feat(main.c, input.c): Print important information to stdout

Makefile

@@ -1,88 +1,80 @@
 BIN = manigraph
 
 OBJ = \
-	src/surface.o \
+	ext/glad/glad.o \
 	src/context.o \
-	src/texture.o \
 	src/window.o \
-	src/matrix.o \
 	src/shader.o \
+	src/klein.o \
 	src/input.o \
+	src/load.o \
 	src/mesh.o \
 	src/main.o 
 
+EXAMPLES = \
+	example/basic \
+	example/riemman \
+	example/n-cube \
+	example/n-hilbert-cube \
+	example/light-cone \
+	example/lens
+
 CFLAGS = \
 	-I./ext/cglm/include  \
 	-I./ext/glfw/include  \
+	-I./ext/glad  \
+	-I./include  \
 	-Wall -Wno-unused-function -std=c99 -D_GNU_SOURCE \
 
-WAYLAND-LIB = \
-	xdg-shell \
-	relative-pointer-unstable-v1 \
-	xdg-decoration-unstable-v1 \
-	pointer-constraints-unstable-v1 \
-	viewporter \
-	idle-inhibit-unstable-v1  \
-	fractional-scale-v1 \
-	xdg-activation-v1 \
-	wayland
-
 help:
-	@echo "Para compilar el proyecto a tu sistema operativo"
-	@echo "porfavor usa uno de los siguientes comandos:"
+	@echo "Usage:"
 	@echo "	$(MAKE) windows"
 	@echo "	$(MAKE) linux-x11"
 	@echo "	$(MAKE) linux-wayland"
 	@echo "	$(MAKE) cocoa"
 	@echo "	$(MAKE) CC=emcc wasm"
-	@echo "Para limpiar los archivos compilados se puede usar"
+	@echo "Examples"
+	@echo "	$(MAKE) examples"
+	@echo "Clean"
 	@echo "	$(MAKE) clean"
-	@echo "Para ejecturar el programa sin instalarlos se puede usar:"
-	@echo "	$(MAKE) run-linux"
 
-src/main.o: src/data/axis.h src/data/shaders.h
+src/main.o: src/data/shaders.h
 
-# WINDOWS
-windows: $(OBJ) glfw.dll
-	$(CC) $(CFLAGS) $(OBJ) -o $(BIN) -L. -lglfw -lopengl32 -lglew32 
+windows: $(OBJ) 
+	#cd ext; $(MAKE) -f glfw.mk windows; cd -
+	$(CC) $(CFLAGS) $(OBJ) -o $(BIN) -L. -lglfw -lopengl32  -lgdi32
 
 glfw.dll:
 	$(CC) -fPIC -shared -D_GLFW_WIN32 -D_GLFW_BUILD_DLL ./ext/glfw/src/*.c -o $@ -lgdi32 
 
-src/main.o: src/data/shaders.h src/data/axis.h
-
 # LINUX
 linux-wayland: $(OBJ)
-	for i in $(WAYLAND-LIB); \
-	do  \
-		wayland-scanner client-header ext/glfw/deps/wayland/$$i.xml ext/glfw/deps/wayland/$$i-client-protocol.h; \
-		wayland-scanner private-code ext/glfw/deps/wayland/$$i.xml ext/glfw/deps/wayland/$$i-client-protocol-code.h; \
-	done
-	$(MAKE) DFLAGS="-D_GLFW_WAYLAND" libglfw.so
-	$(CC) -o $(BIN) $(OBJ) -L. -lGLEW -lGL -lglfw -lm
+	cd ext; $(MAKE) -f glfw.mk linux-wayland; cd -
+	$(CC) -o $(BIN) $(OBJ) ext/libglfw.a -lm
 
 linux-x11: $(OBJ)
-	$(MAKE) DFLAGS="-D_GLFW_X11" libglfw.so
-	$(CC) -o $(BIN) $(OBJ) -L. -lGLEW -lGL -lglfw -lm
+	cd ext; $(MAKE) -f glfw.mk linux-x11; cd -
+	$(CC) -o $(BIN) $(OBJ) ext/libglfw.a -lm 
 
-run-linux:
-	LD_LIBRARY_PATH=. ./$(BIN)
-
-# COCOA
 cocoa: $(OBJ)
-	$(MAKE) DFLAGS="-D_GLFW_COCOA" libglfw.so
-	$(CC) -framework OpenGL -o $(BIN) $(OBJ) -L. -lGLEW -lGL -lglfw 
+	cd ext; $(MAKE) -f glfw.mk cocoa; cd -
+	$(CC) -framework OpenGL -o $(BIN) $(OBJ) ext/glfw.a -lGL -lglfw 
 
 wasm: $(OBJ)
-	$(CC) -sUSE_WEBGL2=1 -sUSE_GLFW=3 -o mani.html $(OBJ)
-
-libglfw.so: 
-	$(CC) -fPIC -shared $(DFLAGS) -D_GLFW_BUILD_DLL -Iext/glfw/deps/wayland ./ext/glfw/src/*.c -o $@ 
+	$(CC) -sUSE_WEBGL2=1 -sUSE_GLFW=3 -o $(BIN).html $(OBJ)
+	chmod -x $(BIN).wasm
 
 clean:
-	rm $(OBJ) $(BIN) ext/glfw/deps/wayland/*.h
+	rm $(OBJ) $(BIN) $(EXAMPLES)
+	cd ext; $(MAKE) -f glfw.mk clean; cd -
+
+
+examples: $(EXAMPLES)
 
 .SUFFIXES: .c .o 
 
-.c.o: src/main.h
-	$(CC) $(CFLAGS) -c -o $@ $<
+.c.o:
+	$(CC) -Wno-implicit-function-declaration $(CFLAGS) -c -o $@ $<
+
+.c:
+	$(CC) -I include  -o $@ $< -lm

README.md

@@ -1,92 +1,62 @@
-# Manigraph: Graficadora de variedades
-Diaz Camacho Pedro Emilio
+# Manigraph
+Manigraph is a cutting-edge tool for multidimentional surface visualization,
+capable of handling over a hundred dimensions. It allows users to interactively
+explore each dimension in an intuitive and dynamic way. 
+Import your .klein files, which represents multidimentional surface.
 
-# Resumen
-manigraph es un graficador interactiva de variedades que lee archivos binarios, con la información de
-una variedad multidimensional y grafica esta variedad en una proyección tridimensional.
+# Building
+Manigraph is written in C99, and uses OpenGL 2.0 for the rendering. So you just
+need a C compiler to build this project.
 
-# Dependencias
-Para poder compilar el proyecto hace falta lo siguiente.
-## Programas
-- `cc`: Cualquier compilador de C.
-- `git`: Gestor de dependencias. (Opcional)
-- `make`: Herramienta para compilar automáticamente. (Opcional) 
-
-## Librerías
-- `openGL`: A cross-platform API for rendering 2D and 3D graphics. (no incluida)
-- `glew`: The OpenGL Extension Wrangler Library (no incluida)
-- `glfw`: A multi-platform library for OpenGL, OpenGL ES, Vulkan, window and input.
-- `cglm`: Highly Optimized 2D / 3D Graphics Math (glm) for C.
-### Linux
-Para compilar `glfw` en linux hacen falta las siguientes librerías. (no incluidas)
-- `x11`: libXcursor-devel libXi-devel libXinerama-devel libXrandr-devel
-- `wayland`: libwayland-dev libxkbcommon-dev wayland-protocols
-
-# Descargas
-- [git](https://git-scm.com/downloads/win)
-- [MinGW](https://github.com/niXman/mingw-builds-binaries/releases)
-- [glew](https://glew.sourceforge.net/)
-
-# Clonar el código fuente
+## Source code
 ```
-git clone https://gitea.adles.top/software/manigraph.git
+git clone https://gitea.axiolutions.top/software/manigraph.git
 cd manigraph
 git submodule update --init --recursive
 ```
 
-# Compilación
-Para compilar manualmente el proyecto se puede usar `make` o ejecutar los comandos manualmente
-en el código fuente de `manigraph`.
+##  Dependecies
+You may need system specific dependecies to build *Manigraph*. 
+[Reference](https://www.glfw.org/docs/3.3/compile.html#compile_deps)
 
-## Make
-Los siguientes comandos sirven para compilar `manigraph` deacuerdo al sistema operativo.
+### Linux
+- `x11`: libXcursor-devel libXi-devel libXinerama-devel libXrandr-devel
+- `wayland`: libwayland-dev libxkbcommon-dev wayland-protocols
+
+## Commands
+A C compiler is needed for building *Manigraph*. and any of those commands
 
 ```
 make windows
+./compile.bat
 make linux-x11
 make linux-wayland
 make cocoa
+make CC=emcc wasm
 ```
 
-## Manualmente
-se pueden compilar el proyecto  manualmente sin necesidad del programa `make`.
+# Flow of Manigraph
+![Flow of Manigraph](doc/flow.svg)
 
-### GLFW
-Si tienes problemas compilando `GLFW` puedes checar su página web oficial
-explicando el tema: [Compiling GLFW](https://www.glfw.org/docs/3.3/compile.html).
+# Design
+Manigraph is a program designed with sustainability in mind. It is built to be 
+portable, resource-efficient, and easy to maintain and scale. The program 
+follows a Data-Oriented Programming (DOP) paradigm, where each file is 
+responsible for a specific data type and manages its own dependencies. Each 
+function is named after the file it resides in, ensuring a clear organization
+and structure.
 
-#### Windows
-```
-cc -fPIC -shared -D_GLFW_WIN32 -D_GLFW_BUILD_DLL ./ext/glfw/src/*.c -o glfw.dll -lgdi32
-```
+The independence of data types allows for efficient scaling and maintenance. 
+The main file is a special case in this design: it is responsible for combining
+all the data types in a comprehensive manner, actng as the workflow of the program.
 
-#### Linux
-```
-cc -fPIC -shared -D_GLFW_X11 -D_GLFW_BUILD_DLL ./ext/glfw/src/*.c -o libglfw.so
-cc -fPIC -shared -D_GLFW_WAYLAND -D_GLFW_BUILD_DLL ./ext/glfw/src/*.c -o libglfw.so
-```
+# Contributing
+Before commiting use `clang-format`, for coding style consistency. Your 
+contribution must be whitin the design principles and the concept of Manigraph.
 
-#### Mac
-```
-cc -fPIC -shared -D_GLFW_COCOA -D_GLFW_BUILD_DLL ./ext/glfw/src/*.c -o libglfw.so
-```
+The following diagram illustrates the relationships between files, showing how 
+they are connected through dependencies. It also highlights the scenarios where
+files are not independent of one another,
 
-### Manigraph
-#### Windows
-```
-cc -I ext/cglm/include/ -I ext/glfw/include/ src/*.c -o manigraph -L. -lglfw -lopengl32 -lglew32
-```
-#### Linux
-```
-cc -I ext/cglm/include/ -I ext/glfw/include/ src/*.c -o manigraph -L. -lglfw -lGL -lGLEW
-```
-#### Mac
-```
-cc -framework GL -I ext/cglm/include/ -I ext/glfw/include/ src/*.c -o manigraph -L. -lglfw -lGLEW
-```
+![File layout](doc/file_layout.svg)
 
-# Ejecutar
-En linux se puede ejecutar el programa sin instalar la libreria de glfw usando:
-```
-LD_LIBRARY_PATH=. ./manigraph
-```

doc/es/dev/estructura-archivos.md

@@ -1,80 +0,0 @@
-# Estructura de archivos
-Díaz Camacho Pedro Emilio
-
-# Headers
-## main.h
-Este archivo incluye los prototipos internos, que va a usar el programa
-funge como api interna para los desarrolladores y debe estar bien documentada.
-
-# codigo fuente
-
-## main.c
-Este archivo debe configurar el programa antes de iniciarse, avisar de los problemas
-que eviten que el programa se ejecute correctamente, iniciar y terminar los objetos que use el
-programa, así como ejecutar la función principal
-### Depende de
-- <GL/gl.h>
-
-## context.c
-En este archivo se escoge un color para limpiar la pantalla y tiene una función para limpiar
-tanto lo dibujado en pantalla, como distintos buffers gráficos.
-### Depende de
-- <GL/gl.h>
-
-## input.c
-Incluye la función `poll_input`, que se ejecuta en cada ciclo del programa y devuelve un
-cuaternion de tipo `float *` que representa la rotación total del cubo, después de interactuar 
-con el programa.
-### Depende de
-- <GLFW/glfw3.h>
-- <cglm/quat.h>
-
-## matrix.c
-Incluye las funciónes para configurar y cargar en la GPU las 3 matrices principales.
-- `fix_matrix` esta matriz no cambia y se usa para configurar la perspectiva y la vista que
-va a usar el programa en todo momento.
-- `mdl_matrix` esta matriz depende de cada mesh y describe la rotación única de cada objeto,
-se usa para rotar los ejes ortogonamente con un indice.
-- `rot_matrix` esta matriz describe la rotación total de todos los objetos y se configura con
-un cuaternio
-### Depende de
-- <cglm/mat4.h>
-- <cglm/cam.h>
-- <cglm/quat.h>
-
-## mesh.c
-Este archivo se usa para crear, destruir y dibujar objetos de tipo `mesh`, un `mesh` es una
-colección de triángulos que describen un objeto multidimensional.
-### Depende de
-- <GL/gl.h>
-- <stdlib.h>
-
-## shader.c
-Debe crear, destruir y usar los shaders, estos shaders son programas para la gpu escritos en glsl para
-además aquí se carga memoria en gpu con las funciónes `gload_`
-### Depende de
-- <GL/gl.h>
-
-## texture.c
-Debe cargar, usar y destruir las texturas, que va a usar la gpu,  también crea una textura 
-para una paleta de colores definida, esto para manipular fácilmente los colores que usará el programa.
-### Depende de
-- <GL/gl.h>
-
-## window.c
-Crea, usa, limpie y cierra una ventana, una ventana tiene un contexto de OpenGL asociado para poder
-dibujar objetos en ella, tiene una función especial para avisar si la ventana está abierta para
-dibujar.
-### Depende de
-- <GLFW/glfw3.h>
-
-# Datos
-## data/cube.h
-Aquí esta la información del mesh de un cubo, este se va a borrar cuando podamos
-importar meshes para graficarlos.
-
-## data/axis.h
-Aquí está el mesh de un solo eje, este se va a rotar para hacer los otros 2 ejes.
-
-## data/shaders.h
-Aquí estan los shaders en glsl para dibujar en pantalla

doc/es/dev/tipos.md

@@ -1,43 +0,0 @@
-# Tipos de datos del proyecto
-Díaz Camacho Pedro Emilio
-
-# Introducción
-En este archivo vamos a detallar los tipos de datos únicos del programa, estos
-tipos de datos son estructuras que representan objetos computacionales y son
-necesarios para integrar las distintas partes del programa.
-
-## window_t
-En `window.c` tenemos una estructura que es la ventana y esta se representa por `window_t`,
-este tipo de dato es un pointer que es manejado por `glfw`.
-
-## id_t
-`id_t` es un tipo de dato que representa objetos de `OpenGL`, estos datos
-normalmente vienen enumerados, y en `manigraph` se usan para representar `shaders`, 
-`programs` y `texture`.
-
-## mesh_t
-Este es un tipo de dato usado para interactuar con `mesh.c`, este representa la triangulación de un
-objeto gráfico y funciona ocultando las variables que `OpenGL` necesita en un `void *`.
-
-## mat4_t
-`mat4_t` se usará para representar las matrices, se usará este tipo de dato exclusivamente
-en `matrix.c` y funcionará con el tipo de dato `mat4` de `cglm`.
-
-## quat_t
-Este tipo de dato sirve para representar un quaternio, este quaternio representa la rotación
-del objeto gráficado en la proyección tridimensional, y se usará para crear una matriz que
-pueda entender `glsl`.
-
-## narray
-`narray` es un tipo de dato que funciona como un `array` enumerado, esto significa que el primer
-elemento del `array` dice cuantos elementos tiene este, sin contar el primer elemento, y los demas elementos 
-funcionan como un `array` normal. 
-
-esta estructura nos ayuda a trabajar con arrays de tamaños arbitrario de forma óptima y sin tener que marcar el
-último elemento de forma especial.
-
-### narray_u8_t
-es un `narray` para `char` y `unsigned char`.
-### narray_float_t
-es un `narray` para `float`.
-

doc/es/tech/diseno.md

@@ -1,59 +0,0 @@
-# Manual de Diseño
-Diaz Camacho Pedro Emilio
-
-# Objetivos
-## Prioridad alta
-- [ ] El programa debe actualizarse cuando interactuan con el.
-- [ ] El usuario quiere:
-	- [X] Ver 3 ejes en todo momento.
-	- [ ] Ver que ejes esta viendo.
-	- [ ] Ver cuantos ejes hay.
-- [X] El usuario quiere:
-	- [X] Rotar estos ejes,
-	- [X] Ver donde quedan los ejes despues de la rotados.
-- [ ] El usuario experimentado quiere ejecutar el programa y pasar la variedad:
-	- [ ] Como argumento del programa.
-	- [ ] Desde la entrada estandar del programa.
-
-## Prioridad media
-
-- [ ] El usuario quiere:
-	- [ ] Cambiar los ejes que se ven por pares.
-	- [ ] Cambiar los ejes donde esta la informacion de los ejes.
-- [ ] El usuario quiere interactuar con el programa:
-	- [ ] Usando solo el mouse.
-	- [ ] Usando solo el teclado.
-
-## Prioridad baja
-- [ ] El usuario quiere guardar las transformaciones como un archivo GIF.
-
-# Camino
-
-0. Graficadora de un cubo.
-	1. Se hace un programa que muestre un cubo.
-	1. Se muestran los 3 ejes del cubo
-	1. Se rota el cubo en sus 3 ejes usando el teclado.
-	1. Se rota el cubo en sus 3 ejes usando el mouse.
-	1. Se muestran la etiqueta de los ejes.
-	1. Se hace el formato de objetos multidimensionales.
-0. Programa ejemplo
-	1. Se hace un programa que divida un cuadrado en triangulos.
-	1. Se mapea cada vertice del triangulo en un punto de la cinta de 
-	mobius usando una parametrizacion
-	1. Se mapea cada vertice del triangulo en un punto de la botella de
-		klein usando una parametrizacion
-	1. Se divide cada lado de un cubo de n dimensiones, en triangulos.
-
-0. Graficadora de variedades
-	1. Se generaliza el programa para usar este formato.
-	1. Se muestran la informacion de los ejes mostrados y cuantos hay.
-	1. Se pueden cambiar los ejes por pares
-		1. Usando el mouse.
-		1. Usando el teclado.
-0. Detalles.
-	1. Se anima el cambio de eje.
-	1. Se hace el generador de GIF.
-	1. Se puede cambiar el shader 
-	1. Documentacion
-
-

doc/es/tech/problemas.md

@@ -1,22 +0,0 @@
-# Problemas esperados al desarrollar
-Diaz Camacho Pedro Emilio
-
-## OpenGL esperan objetos tridimensionales, no de n dimensiones.
-
-Usando glVertexAttribPointer podemos pasar las coordenadas que 
-queramos de los puntos de las variedades, y con ello usar objetos 3D en
-el shader.
-
-## Rotar ejes por pares en una animacion continua.
-- Con glVertexAttribPointer podemos pasar las coordenadas del eje 
-seleccionado, al shader.
-- Con la funcion mix del shader y bloqueando el input, podemos hacer 
-una animacion pasando una variable con la cpu.
-- Cuando la animacion termine intercambiar los indices del layout, 
-usando glVertexAttribPointer otra vez.
-
-## Volumen de la variedad.
-Dado que la funcion parametrizadora es continua, mandamos la frontera
-de un n-cubo a la frontera de una variedad, por lo que solo basta 
-graficar la frontera de la variedad.
-

doc/es/user.md

@@ -1,19 +0,0 @@
-# Manual de usario para Manigraph
-Manigraph es un graficador interactivo de variedades que lee archivos
-binarios de una variedad multidimensional y los proyecta a 3 dimensiones.
-
-# Glosario
-Llamaremos a los 3 ejes de la proyección tridimensional `X`, `Y` y `Z`,
-este sistema de coordenadas es derecho con el eje `Z` apuntando afuera de la pantalla
-
-# Controles
-## Teclado
-- `Q` Rota el eje `X` de forma horaria.
-- `W` Rota el eje `X` de forma antihoraria.
-- `A` Rota el eje `Y` de forma horaria.
-- `S` Rota el eje `Y` de forma antihoraria.
-- `Z` Rota el eje `Z` de forma horaria.
-- `X` Rota el eje `Z` de forma antihoraria.
-## Mouse
-- Hacer `click` en un eje lo selecciona.
-- El `scroll` del mouse hace girar al eje seleccionado.

example/basic.c

@@ -0,0 +1,95 @@
+#include <math.h>
+#include <stdio.h>
+
+#define KLEIN_IMPLEMENT
+#include <klein/klein.h>
+#include <klein/norm.h>
+#include <klein/parm.h>
+
+#ifndef M_PI
+#define M_PI 3.14159265358979323846
+#endif
+
+void cube(float *d_surface, int *coord, unsigned char *grid)
+{
+	int i;
+
+	for (i = 0; i < 4; i++)
+		d_surface[i] = (2 * (float)coord[i] / grid[i]) - 1;
+
+	if (4 == 2)
+		d_surface[2] = 0;
+}
+
+void mobius(float *d_surface, int *coord, unsigned char *grid)
+{
+	const float width = 0.5;
+	float u = (2 * M_PI) * ((float)coord[0] / grid[0]);
+	float v = (2 * width) * ((float)coord[1] / grid[1]) - width;
+
+	d_surface[0] = cos(u) + v * cos(u / 2) * cos(u);
+	d_surface[1] = sin(u) + v * cos(u / 2) * sin(u);
+	d_surface[2] = v * sin(u / 2);
+}
+
+void torus(float *d_surface, int *coord, unsigned char *grid)
+{
+	float u = (M_PI) * ((float)coord[0] / grid[0]) + M_PI;
+	float v = (2 * M_PI) * ((float)coord[1] / grid[1]);
+
+	d_surface[0] = (1 + 0.5 * cos(v)) * cos(u);
+	d_surface[1] = (1 + 0.5 * cos(v)) * sin(u);
+	d_surface[2] = 0.5 * sin(v);
+}
+
+void klein(float *d_surface, int *coord, unsigned char *grid)
+{
+	float u = (2 * M_PI) * ((float)coord[0] / grid[0]);
+	float v = (2 * M_PI) * ((float)coord[1] / grid[1]);
+
+	d_surface[0] = (0.5 * cos(v) + 0.5) * cos(u);
+	d_surface[1] = (0.5 * cos(v) + 0.5) * sin(u);
+	d_surface[2] = sin(v) * cos(u / 2);
+	d_surface[3] = sin(v) * sin(u / 2);
+}
+
+int main(void)
+{
+	unsigned char i = 0;
+	const char *file_name[] = {"mobius.klein", "torus.klein", "klein.klein"};
+	struct parm parametrization[] = {
+		{
+			 .grid = (unsigned char[]){16, 4},
+
+			 .m = 2,
+			 .n = 3,
+			 .f = mobius,
+		 },
+		{
+			.grid = (unsigned char[]){16, 8},
+			.m = 2,
+			.n = 3,
+			.f = torus,
+		},
+		{
+			.grid = (unsigned char[]){16, 16},
+			.m = 2,
+			.n = 4,
+			.f = klein,
+		},
+	};
+
+	for (i = 0; i < 4; ++i)
+	{
+		struct klein klein;
+		printf("writing %s\n", file_name[i]);
+
+		klein_parametrize(&klein, parametrization[i]);
+		klein_normalize(&klein);
+		klein_export_file(klein, file_name[i]);
+
+		free(klein.vertex);
+		free(klein.normals);
+	}
+	return 0;
+}

example/lens.c

@@ -0,0 +1,54 @@
+#include <math.h>
+#include <stdio.h>
+
+#define KLEIN_IMPLEMENT
+#include <klein/klein.h>
+#include <klein/norm.h>
+#include <klein/parm.h>
+
+int p = 37;
+int q = 7;
+
+void lens(float *d_surface, int *coord, unsigned char * grid)
+{
+
+	float norm = 0;
+	float sphere[4];
+
+	for (int i = 0; i < 4; i++)
+		sphere[i] = ((float)coord[i] / grid[i]) - 0.5;
+
+	for(int i = 0; i < 4; i++)
+		norm += sphere[i] * sphere[i];
+
+	for (int i = 0; i < 4; i++)
+		sphere[i] = sphere[i] / sqrt(norm);
+	
+	d_surface[0] = (sphere[0] * cos(2 * M_PI / p)) - (sphere[1] * sin(2 * M_PI / p));
+	d_surface[1] = (sphere[0] * sin(2 * M_PI / p)) + (sphere[1] * cos(2 * M_PI / p));
+	d_surface[2] = (sphere[2] * cos(2 * M_PI * q / p)) - (sphere[3] * sin(2 * M_PI * q / p));
+	d_surface[3] = (sphere[2] * sin(2 * M_PI * q / p)) + (sphere[3] * cos(2 * M_PI * q / p));
+}
+
+int main(void)
+{
+	char file_name[0xff];
+	struct klein klein;
+	struct parm parametrization = {
+		.grid = (unsigned char[]){8, 8,8,8},
+		.m = 4,
+		.n = 4,
+		.f = lens,
+	};
+
+	snprintf(file_name, 0xff, "lens-%03d-%03d.klein", p, q);
+	printf("writing %s\n", file_name);
+
+	klein_parametrize(&klein, parametrization);
+	klein_normalize(&klein);
+	klein_export_file(klein, file_name);
+
+	free(klein.vertex);
+	free(klein.normals);
+	return 0;
+}

example/n-cube.c

@@ -0,0 +1,50 @@
+#include <math.h>
+#include <stdio.h>
+
+#define KLEIN_IMPLEMENT
+#include <klein/klein.h>
+#include <klein/norm.h>
+#include <klein/parm.h>
+
+#ifndef M_PI
+#define M_PI 3.14159265358979323846
+#endif
+
+unsigned char dim = 17;
+
+void cube(float *d_surface, int *coord, unsigned char *grid)
+{
+	int i;
+
+	for (i = 0; i < dim; i++)
+		d_surface[i] = (2 * (float)coord[i] / grid[i]) - 1;
+
+	if (dim == 2)
+		d_surface[2] = 0;
+}
+
+int main(void)
+{
+	unsigned char i;
+	char file_name[0xff];
+	struct klein klein;
+	struct parm parametrization = {
+		.m = dim,
+		.n = dim,
+		.f = cube,
+	};
+
+	parametrization.grid = malloc(dim);
+	
+	for (i = 0; i < dim; ++i)
+		parametrization.grid[i] = 1 + i;
+
+	snprintf(file_name, 0xff, "cube-%03d.klein", dim);
+	printf("writing %s\n", file_name);
+
+	klein_parametrize(&klein, parametrization);
+	klein_normalize(&klein);
+	klein_export_file(klein, file_name);
+
+	return 0;
+}

example/riemman.c

@@ -0,0 +1,50 @@
+#include <complex.h>
+#include <math.h>
+#include <stdio.h>
+
+#define KLEIN_IMPLEMENT
+#include <klein/klein.h>
+#include <klein/norm.h>
+#include <klein/parm.h>
+
+#ifndef CMPLX
+#define CMPLX(a, b) (a + I * b)
+#endif
+
+complex float f(complex float z) { return csqrt(z); }
+
+void riemman(float *d_surface, int *coords, unsigned char *grid)
+{
+	complex float eq;
+	float u = 2 * ((float)coords[0] / grid[0]) - 1;
+	float v = 2 * ((float)coords[1] / grid[1]) - 1;
+
+	eq = f(CMPLX(u, v));
+
+	d_surface[0] = u;
+	d_surface[1] = v;
+	d_surface[2] = creal(eq);
+	d_surface[3] = cimag(eq);
+}
+
+int main(void)
+{
+	const char *file_name = "riemman.klein";
+	struct klein klein;
+	struct parm parametrization = {
+		.grid = (unsigned char[]){16, 4},
+		.m = 2,
+		.n = 4,
+		.f = riemman,
+	};
+
+	printf("writing %s\n", file_name);
+
+	klein_parametrize(&klein, parametrization);
+	klein_normalize(&klein);
+	klein_export_file(klein, file_name);
+
+	free(klein.vertex);
+	free(klein.normals);
+	return 0;
+}

ext/glfw.mk

@@ -0,0 +1,71 @@
+BIN = libglfw.a
+OBJ = \
+	glfw/src/context.o \
+	glfw/src/egl_context.o \
+	glfw/src/glx_context.o \
+	glfw/src/init.o \
+	glfw/src/input.o \
+	glfw/src/linux_joystick.o \
+	glfw/src/monitor.o \
+	glfw/src/null_init.o \
+	glfw/src/null_joystick.o \
+	glfw/src/null_monitor.o \
+	glfw/src/null_window.o \
+	glfw/src/osmesa_context.o \
+	glfw/src/platform.o \
+	glfw/src/posix_module.o \
+	glfw/src/posix_poll.o \
+	glfw/src/posix_thread.o \
+	glfw/src/posix_time.o \
+	glfw/src/vulkan.o \
+	glfw/src/wgl_context.o \
+	glfw/src/win32_init.o \
+	glfw/src/win32_joystick.o \
+	glfw/src/win32_module.o \
+	glfw/src/win32_monitor.o \
+	glfw/src/win32_thread.o \
+	glfw/src/win32_time.o \
+	glfw/src/win32_window.o \
+	glfw/src/window.o \
+	glfw/src/wl_init.o \
+	glfw/src/wl_monitor.o \
+	glfw/src/wl_window.o \
+	glfw/src/x11_init.o \
+	glfw/src/x11_monitor.o \
+	glfw/src/x11_window.o \
+	glfw/src/xkb_unicode.o 
+
+WAYLAND-LIB = \
+	xdg-shell \
+	relative-pointer-unstable-v1 \
+	xdg-decoration-unstable-v1 \
+	pointer-constraints-unstable-v1 \
+	viewporter \
+	idle-inhibit-unstable-v1  \
+	fractional-scale-v1 \
+	xdg-activation-v1 \
+	wayland
+
+windows: 
+	$(MAKE) $(OBJ) CFLAGS="-D_GLFW_WIN32 -Iglfw/deps/wayland"
+	$(AR) rsc $(BIN) $(OBJ)
+
+linux-x11: 
+	$(MAKE) $(OBJ) CFLAGS="-D_GLFW_X11 -Iglfw/deps/wayland"
+	$(AR) rsc $(BIN) $(OBJ)
+
+
+linux-wayland: 
+	for i in $(WAYLAND-LIB); \
+	do  \
+		wayland-scanner client-header glfw/deps/wayland/$$i.xml glfw/deps/wayland/$$i-client-protocol.h; \
+		wayland-scanner private-code glfw/deps/wayland/$$i.xml glfw/deps/wayland/$$i-client-protocol-code.h; \
+	done
+	$(MAKE) $(OBJ) CFLAGS="-D_GLFW_WAYLAND -fPIC -Iglfw/deps/wayland"
+	$(AR) rsc $(BIN) $(OBJ)
+
+
+
+clean:
+	rm $(OBJ) $(BIN)
+	rm glfw/deps/wayland/*.h

include/klein/klein.h

@@ -0,0 +1,50 @@
+#ifdef KLEIN_H
+#error file included twice
+#endif
+#define KLEIN_H
+
+#include <stdint.h>
+
+#ifdef KLEIN_IMPLEMENT
+#include <stdio.h>
+#include <stdlib.h>
+#endif
+
+struct klein
+{
+	float *vertex, *normals;
+	uint64_t vertex_size;
+	uint8_t dim;
+};
+
+/*
+	The klein format must have:
+		5 bytes with klein.
+		1 byte empty for expantions
+		1 byte with the dimention of the surface
+
+*/
+
+static inline
+int klein_export_file(struct klein klein, const char * filename);
+
+
+#ifdef KLEIN_IMPLEMENT
+static inline
+int klein_export_file(struct klein klein, const char * filename)
+{
+	FILE *file = fopen(filename, "wb");
+	if (!file)
+		return 1;
+
+	fwrite("KLEIN", 1, 5, file);
+	fwrite("\0", 1, 1, file);
+	fwrite(&klein.dim, 1, 1, file);
+	fwrite(&klein.vertex_size, 8, 1, file);
+	fwrite(klein.vertex, 4, klein.vertex_size * klein.dim, file);
+	fwrite(klein.normals, 4, klein.vertex_size * klein.dim, file);
+
+	fclose(file);
+	return 0;
+}
+#endif

include/klein/norm.h

@@ -0,0 +1,132 @@
+#ifdef KLEIN_NORM_H
+#error file included twice
+#endif
+#define KLEIN_NORM_H
+
+
+#ifndef KLEIN_H
+#warning Please include klein/klein.h
+#endif
+
+void klein_normalize(struct klein * klein);
+
+#ifdef KLEIN_IMPLEMENT
+static inline
+void __calculate_normal( float *p1, float *p2, float *p3, float *normal, unsigned char n)
+{ unsigned char i;
+	float alpha;
+	float *v1, *v2, *v3;
+	float *u1, *u2, *u3;
+
+	v1 = malloc(n * sizeof(float));
+	v2 = malloc(n * sizeof(float));
+	v3 = malloc(n * sizeof(float));
+	u1 = malloc(n * sizeof(float));
+	u2 = malloc(n * sizeof(float));
+	u3 = malloc(n * sizeof(float));
+
+	/*
+		Calculate a normal vector of a plain using Gram-Schmidt process
+	*/
+	{
+		for (i = 0; i < n; ++i)
+		{
+			v1[i] = p2[i] - p1[i];
+			v2[i] = p3[i] - p1[i];
+			v3[i] = p1[i];
+		}
+
+		for (i = 0; i < n; ++i)
+		{
+			u1[i] = v1[i];
+		}
+
+		{
+			float proj[n];
+			float dot_v2_u1 = 0.0f, dot_u1_u1 = 0.0f;
+			for (i = 0; i < n; ++i)
+			{
+				dot_v2_u1 += v2[i] * u1[i];
+				dot_u1_u1 += u1[i] * u1[i];
+			}
+			alpha = dot_v2_u1 / dot_u1_u1;
+
+			for (i = 0; i < n; ++i)
+			{
+				proj[i] = u1[i] * alpha;
+				u2[i] = v2[i] - proj[i];
+			}
+		}
+
+		{
+			float proj1[n], proj2[n];
+			float dot_v3_u1 = 0.0f, dot_u1_u1 = 0.0f;
+			float dot_v3_u2 = 0.0f, dot_u2_u2 = 0.0f;
+
+			for (i = 0; i < n; ++i)
+			{
+				dot_v3_u1 += v3[i] * u1[i];
+				dot_u1_u1 += u1[i] * u1[i];
+			}
+			for (i = 0; i < n; ++i)
+			{
+				proj1[i] = u1[i] * (dot_v3_u1 / dot_u1_u1);
+			}
+
+			for (i = 0; i < n; ++i)
+			{
+				dot_v3_u2 += v3[i] * u2[i];
+				dot_u2_u2 += u2[i] * u2[i];
+			}
+			for (i = 0; i < n; ++i)
+			{
+				proj2[i] = u2[i] * (dot_v3_u2 / dot_u2_u2);
+				u3[i] = v3[i] - proj1[i] - proj2[i];
+			}
+		}
+
+		float magnitude = 0.0f;
+		for (i = 0; i < n; ++i)
+		{
+			magnitude += u3[i] * u3[i];
+		}
+		magnitude = sqrtf(magnitude);
+
+		for (i = 0; i < n; ++i)
+		{
+			normal[i] = u3[i] / magnitude;
+		}
+
+		free(v1);
+		free(v2);
+		free(v3);
+		free(u1);
+		free(u2);
+		free(u3);
+		return;
+	}
+}
+
+void klein_normalize(struct klein * klein)
+{
+	unsigned long i;
+	unsigned char j;
+	float *norm_vec;
+
+	klein->normals = malloc((klein->dim * klein->vertex_size) * sizeof(float));
+	norm_vec = malloc(klein->dim * sizeof(float));
+
+	for (i = 0; i < klein->vertex_size; i += 3 * klein->dim)
+	{
+		__calculate_normal(klein->vertex + i, klein->vertex + i + klein->dim, klein->vertex + i + 2 * klein->dim, norm_vec, klein->dim);
+		for (j = 0; j < klein->dim; ++j )
+		{
+			(klein->normals + i)[j]=norm_vec[j];
+			(klein->normals + i + klein->dim)[j]=norm_vec[j];
+			(klein->normals + i + 2*klein->dim)[j]=norm_vec[j];
+		}
+	}
+
+	free(norm_vec);
+}
+#endif

include/klein/parm.h

@@ -0,0 +1,136 @@
+#ifndef KLEIN_H
+#warning Please include klein/klein.h before klein/parm.h
+#endif
+
+#ifdef KLEIN_PARM_H
+#error file included twice
+#endif
+#define KLEIN_PARM_H
+
+
+typedef void (*function_t)(float *, int *, unsigned char *);
+
+struct parm
+{
+	unsigned char *grid;
+	unsigned char m, n;
+	function_t f;
+};
+
+
+void klein_parametrize( struct klein * klein, struct parm parm );
+
+#ifdef KLEIN_IMPLEMENT
+#ifdef TEST
+#include <assert.h>
+#endif
+
+static inline uint64_t __factorial(uint64_t n)
+{
+	if (n == 1)
+		return 1;
+
+	return n * __factorial(n - 1);
+}
+
+static inline uint64_t __face(int n)
+{
+	if (n == 2)
+		return 1;
+
+	return (1 << (n - 3)) * __factorial(n) / __factorial(n - 2);
+}
+
+void klein_parametrize( struct klein * klein, struct parm parm)
+{
+	unsigned long i, j,  o, p, n;
+	uint64_t k, size, q = 0;
+	int *face;
+
+#ifdef TEST
+	assert(__face(2) == 1);
+	assert(__face(3) == 6);
+	assert(__face(4) == 24);
+#endif
+
+	klein->dim = parm.n;
+	klein->vertex_size = 0;
+	{
+		uint64_t test = 0;
+
+		for (o = 0; o < parm.m; o++)
+			for (p = 0; p < o; p++)
+				test += 1;
+
+
+		for (o = 0; o < parm.m; o++)
+			for (p = 0; p < o; p++)
+				klein->vertex_size += (uint64_t)parm.grid[p] * parm.grid[o] * 6 * __face(parm.m)/test;
+
+	}
+
+	size = klein->vertex_size*klein->dim;
+
+	klein->vertex = malloc(size * sizeof(float));
+	face = malloc(parm.m * sizeof(int));
+
+
+	for (o = 0; o < parm.m; o++)
+	{
+		for (p = 0; p < o; p++)
+		{
+			for (k = 0; k < ((uint64_t)1 << (parm.m - 2)); k++)
+			{
+				unsigned char skip = 0;
+				for (n = 0; n < parm.m; n++)
+				{
+					if (n == o || n == p)
+						skip++;
+
+					face[n] = (k & ((uint64_t)1 << (n - skip))) ? parm.grid[n] : 0;
+				}
+
+				for (i = 0; i < parm.grid[p]; i++)
+				{
+					for (j = 0; j < parm.grid[o]; j++)
+					{
+						face[p] = i;
+						face[o] = j;
+						parm.f(&klein->vertex[q], face, parm.grid);
+						q += parm.n;
+
+						face[p] = i + 1;
+						face[o] = j;
+						parm.f(&klein->vertex[q], face, parm.grid);
+						q += parm.n;
+
+						face[p] = i + 1;
+						face[o] = j + 1;
+						parm.f(&klein->vertex[q], face, parm.grid);
+						q += parm.n;
+
+						face[p] = i;
+						face[o] = j;
+						parm.f(&klein->vertex[q], face, parm.grid);
+						q += parm.n;
+
+						face[p] = i;
+						face[o] = j + 1;
+						parm.f(&klein->vertex[q], face, parm.grid);
+						q += parm.n;
+
+						face[p] = i + 1;
+						face[o] = j + 1;
+						parm.f(&klein->vertex[q], face, parm.grid);
+						q += parm.n;
+					}
+				}
+			}
+		}
+	}
+
+#ifdef TEST
+	assert(q == size);
+#endif
+}
+#endif

src/context.c

@@ -3,18 +3,13 @@
 #ifdef EMSCRIPTEN
 #include <GL/gl.h>
 #else
-#ifdef GLAD
-#include <GLFW/glfw3.h>
 #include <glad.h>
-#else
-#include <GL/glew.h>
-#endif
+#include <GLFW/glfw3.h>
 #endif
 
 void set_clean_color_context(unsigned char r, unsigned char g, unsigned char b)
 {
 	glEnable(GL_DEPTH_TEST);
-
 	glClearColor((float)r / 0xff, (float)g / 0xff, (float)b / 0xff, 1.0);
 }
 
@@ -23,12 +18,7 @@ int init_context(void)
 #ifdef EMSCRIPTEN
 	return 1;
 #else
-#ifdef GLAD
-
 	return gladLoadGLLoader((GLADloadproc)glfwGetProcAddress);
-#else
-	return glewInit();
-#endif
 #endif
 }
 

src/data/axis.h

@@ -1,40 +0,0 @@
-#undef A
-#undef B 
-#undef C 
-#undef D
-#undef E
-#undef F
-#undef G 
-#undef H
-
-#define A -2.0,-0.05,-0.05,
-#define B -2.0,-0.05, 0.05,
-#define C -2.0, 0.05,-0.05,
-#define D -2.0, 0.05, 0.05,
-#define E  2.0,-0.05,-0.05,
-#define F  2.0,-0.05, 0.05,
-#define G  2.0, 0.05,-0.05,
-#define H  2.0, 0.05, 0.05,
-
-float d_axis[] =
-{
-	3*3*2*6,
-
-	A C E
-	G E C
-
-	E G F
-	H F G
-
-	F H B
-	D B H
-
-	B D A
-	C A D 
-
-	C D G
-	H G D
-
-	E B A
-	B E F
-};

src/data/shaders.h

@@ -1,4 +1,4 @@
-const char * vs =
+const char *vs =
 #ifdef EMSCRIPTEN
 	"#version 300 es\n"
 	"precision highp float;"
@@ -15,79 +15,84 @@ const char * vs =
 	"layout (location = 6) in float aNormal_z;"
 	"layout (location = 7) in float aNormal_w;"
 
-	"uniform float idx;"
+	"uniform float angle;"
+	"uniform float i;"
+	"uniform vec4 color;"
+
 	"uniform mat4 fix;"
 	"uniform mat4 rot;"
-	"uniform mat4 mdl;"
 
-	"out float index;"
 	"out vec3 Normal;"
 	"out vec3 FragPos;"
+	"out vec4 Color;"
+
+	"mat2 rotate2d( float angle )"
+	"{"
+	"return mat2( cos(angle), sin(angle), -sin(angle), cos(angle) );"
+	"}"
 
 	"void main()"
 	"{"
-	"	index=idx;"
+	"	Color=color;"
+
 	"	vec3 aNormal = vec3(aNormal_x,aNormal_y,aNormal_z);"
 	"	vec3 aPos = vec3(aPos_x,aPos_y,aPos_z);"
-	"	Normal = mat3(transpose(inverse(rot*mdl))) * aNormal;"
-	"	gl_Position = fix * rot * mdl * vec4( aPos, 1.0 );\n"
-	"	FragPos = vec3( rot * mdl * vec4(aPos, 1.0));"
+
+	"	aNormal[int(i)] = (vec2(aNormal[int(i)], aNormal_w) * "
+	"rotate2d(angle))[0];"
+	"	aPos[int(i)] = (vec2(aPos[int(i)], aPos_w) * rotate2d(angle))[0];"
+
+	"	Normal = mat3(transpose(inverse(rot))) * aNormal;"
+	"	gl_Position = fix * rot * vec4( aPos, 1.0 );\n"
+	"	FragPos = vec3( rot * vec4(aPos, 1.0));"
 	"}";
 
-	
-const char * fs_plain =
+const char *fs_plain =
 #ifdef EMSCRIPTEN
 	"#version 300 es\n"
-
 	"precision highp float;"
-	"precision highp sampler2DArray;"
 #else
 	"#version 330 core\n"
 #endif
-	"uniform sampler2DArray palette;"
-
-	"in float index;"
 	"out vec4 FragColor;"
 	"in vec3 Normal;"
 	"in vec3 FragPos;"
+	"in vec4 Color;"
 
 	"void main()"
 	"{"
-	"	FragColor = texture( palette, vec3( 0, 0, index ) ).rgba;"
+	"	FragColor = vec4(pow(vec3(Color),vec3(1.0/1.0)),Color.a);"
 	"}";
 
-const char * fs =
+const char *fs =
 #ifdef EMSCRIPTEN
-    "#version 300 es\n"
+	"#version 300 es\n"
 	"precision highp float;"
-	"precision highp sampler2DArray;"
 #else
-    "#version 330 core\n"
+	"#version 330 core\n"
 #endif
 
-    "uniform sampler2DArray palette;"
+	"in vec3 Normal;"
+	"in vec3 FragPos;"
+	"in vec4 Color;"
 
-    "in float index;"
-    "in vec3 Normal;"
-    "in vec3 FragPos;"
+	"out vec4 FragColor;"
 
-    "out vec4 FragColor;"
+	"void main()"
+	"{"
 
-    "void main()"
-    "{"
-    "   vec4 color = texture(palette, vec3(0, 0, index));\n"
+	"   vec3 viewPos = vec3(0, 0, -15);\n"
+	"   vec3 viewDir = normalize(viewPos - FragPos);\n"
 
-    "   vec3 viewPos = vec3(0, 0, -15);\n"
-    "   vec3 viewDir = normalize(viewPos - FragPos);\n"
+	"   vec3 lightPos = viewPos;\n"
+	"   vec3 lightDir = normalize(lightPos - FragPos);\n"
 
-    "   vec3 lightPos = viewPos;\n"
-    "   vec3 lightDir = normalize(lightPos - FragPos);\n"
+	"   vec3 halfwayDir = normalize(lightDir + viewDir);\n"
 
-    "   vec3 halfwayDir = normalize(lightDir + viewDir);\n"
+	"   float specular = pow(abs(dot(normalize(Normal), halfwayDir)), 32.0);\n"
+	"   float diffuse = abs(dot(normalize(Normal), lightDir));\n"
 
-    "   float specular = pow(max(dot(normalize(Normal), halfwayDir), 0.0), 16.0);\n"
-    "   float diffuse = max(dot(normalize(Normal), lightDir), 0.0);\n"
-
-    "   vec3 result = (0.5 + 0.5 * diffuse + specular) * color.rgb;\n"
-    "   FragColor = vec4(result, color.a);\n"
-    "}";
+	"   vec3 result = pow((0.5 + 0.5*diffuse + 1*specular) * Color.rgb, "
+	"vec3(1.0/2.2));\n"
+	"   FragColor = vec4(result, Color.a);\n"
+	"}";

src/input.c

@@ -1,4 +1,5 @@
 #include "main.h"
+#include <glad.h>
 #include <GLFW/glfw3.h>
 #include <cglm/quat.h>
 #include <stdio.h>
@@ -9,7 +10,9 @@ unsigned char selected_axis = 0;
 int window_width;
 int window_height;
 
-versor q = GLM_QUAT_IDENTITY_INIT;
+static versor q = GLM_QUAT_IDENTITY_INIT;
+unsigned char animate_index = 0;
+
 
 vec3 axis[3] = {
 	{1, 0, 0},
@@ -19,6 +22,23 @@ vec3 axis[3] = {
 
 extern struct projection projection;
 
+static inline
+void __input_update_q(versor p)
+{
+	glm_quat_mul(p, q, q);
+	glm_quat_rotatev(p, axis[0], axis[0]);
+	glm_quat_rotatev(p, axis[1], axis[1]);
+	glm_quat_rotatev(p, axis[2], axis[2]);
+	glm_quat_normalize(q);
+}
+
+void __error_callback_input(int x, const char * msg )
+{
+	mlog("[GLFW] ");
+	mlog(msg);
+	mlog("\n");
+}
+
 void __key_callback_input(
 	GLFWwindow *window, int key, int scancode, int action, int mods)
 {
@@ -40,7 +60,7 @@ void __key_callback_input(
 		if (selected_coord == projection.z)
 			return;
 
-		selected_coord = projection.w;
+		projection.w = selected_coord;
 	}
 
 	if (projection.w >= projection.m)
@@ -49,25 +69,30 @@ void __key_callback_input(
 	switch (key)
 	{
 		unsigned char tmp;
-
-	case GLFW_KEY_P:
+	case GLFW_KEY_Z:
 		tmp = projection.w;
 		projection.w = projection.x;
 		projection.x = tmp;
+
+		animate_index = 1;
 		break;
-	case GLFW_KEY_O:
+	case GLFW_KEY_X:
 		tmp = projection.w;
 		projection.w = projection.y;
 		projection.y = tmp;
+		animate_index = 2;
 		break;
-	case GLFW_KEY_I:
+	case GLFW_KEY_C:
 		tmp = projection.w;
 		projection.w = projection.z;
 		projection.z = tmp;
+		animate_index = 3;
 		break;
+	default:
+		return;
 	}
 
-	set_projection_mesh(projection);
+	printf("[AXIS] (X,Y,Z,W) = (%d,%d,%d,%d)\n", projection.x, projection.y, projection.z, projection.w);
 	return;
 }
 
@@ -82,80 +107,138 @@ void __window_callback_input(GLFWwindow *window, int w, int h)
 	glViewport((w - m) / 2, (h - m) / 2, m, m);
 }
 
-void __mouse_callback_input(
-	GLFWwindow *window, int button, int action, int mods)
+static double xpos_s, ypos_s;
+static char lbutton_down = 0;
+
+void __mouse_callback_input(GLFWwindow* window, int button, int action, int mods)
 {
-	unsigned char green_value;
-	double xpos, ypos;
+	if( button == GLFW_MOUSE_BUTTON_LEFT && action == GLFW_PRESS)
+		lbutton_down = 1;
 
-	if (button != GLFW_MOUSE_BUTTON_LEFT || action != GLFW_PRESS)
-		return;
-
-	glfwGetCursorPos(window, &xpos, &ypos);
-	glReadPixels((int)xpos, (int)(window_height - ypos), 1, 1, GL_GREEN,
-		GL_UNSIGNED_BYTE, &green_value);
-
-	switch (green_value)
+	if( button == GLFW_MOUSE_BUTTON_LEFT && action == GLFW_RELEASE)
 	{
-	case 0xD3:
-	case 0xD4:
-	case 0xD5:
-		selected_axis = green_value - 0xD3;
+		glfwGetCursorPos(window, &xpos_s, &ypos_s);
+		lbutton_down = 0;
 	}
+
+}
+
+void __cursor_callback_input(
+	GLFWwindow *window, double xpos, double ypos)
+{
+	if( lbutton_down )
+	{
+		versor p = GLM_QUAT_IDENTITY_INIT;
+		glm_quatv(p, ANGLE, (vec3){-1*(ypos-ypos_s),(xpos-xpos_s),0});
+		__input_update_q(p);
+	}
+
 }
 
 void __scroll_callback_input(GLFWwindow *window, double xoffset, double yoffset)
 {
 	versor p = GLM_QUAT_IDENTITY_INIT;
+	versor r = GLM_QUAT_IDENTITY_INIT;
 
-	glm_quatv(p, yoffset * ANGLE, axis[selected_axis]);
-
+	// glm_quatv(p, yoffset * ANGLE, axis[selected_axis]);
+	glm_quatv(p, yoffset * ANGLE * 2, (vec3){-1, 0, 0});
+	glm_quatv(r, xoffset * ANGLE * 2, (vec3){0, 1, 0});
 	glm_quat_mul(p, q, q);
+	glm_quat_mul(r, q, q);
+
 	glm_quat_rotatev(p, axis[0], axis[0]);
 	glm_quat_rotatev(p, axis[1], axis[1]);
 	glm_quat_rotatev(p, axis[2], axis[2]);
+
+	glm_quat_rotatev(r, axis[0], axis[0]);
+	glm_quat_rotatev(r, axis[1], axis[1]);
+	glm_quat_rotatev(r, axis[2], axis[2]);
+}
+
+void __drop_callback_input(GLFWwindow *window, int count, char **path)
+{
+	struct surface surface;
+
+	if (create_surface_klein(*path, &surface))
+		return;
+
+	if (!(projection.mesh = create_mesh(surface)))
+		return;
+
+	projection.m = surface.dim;
+	set_projection_mesh(projection);
+
+	free(surface.norm);
+	free(surface.data);
 }
 
 quat_t poll_input(window_t window)
 {
 	versor p = GLM_QUAT_IDENTITY_INIT;
 
-	if (glfwGetKey((GLFWwindow *)window, 'Q') == GLFW_PRESS)
+	if (glfwGetKey((GLFWwindow *)window, 'W') == GLFW_PRESS)
 	{
 		glm_quatv(p, ANGLE, axis[0]);
 		goto end;
 	}
-	if (glfwGetKey((GLFWwindow *)window, 'W') == GLFW_PRESS)
+	if (glfwGetKey((GLFWwindow *)window, 'S') == GLFW_PRESS)
 	{
 		glm_quatv(p, -ANGLE, axis[0]);
 		goto end;
 	}
 	if (glfwGetKey((GLFWwindow *)window, 'A') == GLFW_PRESS)
-	{
-		glm_quatv(p, ANGLE, axis[1]);
-		goto end;
-	}
-	if (glfwGetKey((GLFWwindow *)window, 'S') == GLFW_PRESS)
 	{
 		glm_quatv(p, -ANGLE, axis[1]);
 		goto end;
 	}
-	if (glfwGetKey((GLFWwindow *)window, 'Z') == GLFW_PRESS)
+	if (glfwGetKey((GLFWwindow *)window, 'D') == GLFW_PRESS)
+	{
+		glm_quatv(p, ANGLE, axis[1]);
+		goto end;
+	}
+	if (glfwGetKey((GLFWwindow *)window, 'Q') == GLFW_PRESS)
 	{
 		glm_quatv(p, ANGLE, axis[2]);
 		goto end;
 	}
-	if (glfwGetKey((GLFWwindow *)window, 'X') == GLFW_PRESS)
+	if (glfwGetKey((GLFWwindow *)window, 'E') == GLFW_PRESS)
 	{
 		glm_quatv(p, -ANGLE, axis[2]);
 		goto end;
 	}
 
+	if (glfwGetKey((GLFWwindow *)window, GLFW_KEY_UP) == GLFW_PRESS)
+	{
+		glm_quatv(p, ANGLE, (vec3){1,0,0});
+		goto end;
+	}
+	if (glfwGetKey((GLFWwindow *)window, GLFW_KEY_DOWN) == GLFW_PRESS)
+	{
+		glm_quatv(p, -ANGLE, (vec3){1,0,0});
+		goto end;
+	}
+	if (glfwGetKey((GLFWwindow *)window, GLFW_KEY_RIGHT) == GLFW_PRESS)
+	{
+		glm_quatv(p, ANGLE, (vec3){0,1,0});
+		goto end;
+	}
+	if (glfwGetKey((GLFWwindow *)window, GLFW_KEY_LEFT) == GLFW_PRESS)
+	{
+
+		glm_quatv(p, -ANGLE, (vec3){0,1,0});
+		goto end;
+	}
+
 end:
-	glm_quat_mul(p, q, q);
-	glm_quat_rotatev(p, axis[0], axis[0]);
-	glm_quat_rotatev(p, axis[1], axis[1]);
-	glm_quat_rotatev(p, axis[2], axis[2]);
-	glm_quat_normalize(q);
+/*
+	// LOG INFO
+	if (0)
+	{
+		printf("QUAT: %2.5f %2.5f %2.5f %2.5f\n", q[0], q[1], q[2], q[3]);
+		printf("\n");
+	}
+*/
+
+	__input_update_q(p);
 	return q;
 }

src/klein.c

@@ -0,0 +1,45 @@
+#include "main.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+
+/*
+	KLEIN Format:
+		5 bytes with KLEIN
+		1 byte empty for scaling
+		1 byte with the dimention of the surface
+		8 bytes interprated as an int  with the number of vertex
+		n bytes with the vertex data of the surface
+		n bytes with the normal data of the surface
+
+	where n is the size of the vertex and normal data that could be 
+	calculated as the dimention of the surface  time the number of vertes 
+	time the size of a 16 bytes float.
+*/
+
+int create_surface_klein(unsigned char *path, struct surface *surface)
+{
+	unsigned long size;
+	char buffer[5];
+	FILE *file = fopen(path, "rb");
+	if (!file)
+		return 1;
+
+	fread(buffer, 1, 5, file);
+
+	if (strncmp(buffer, "KLEIN", 5))
+		return 1;
+
+	fread(buffer, 1, 1, file);
+	fread(&surface->dim, 1, 1, file);
+	fread(&surface->vertex, 8, 1, file);
+
+	size = surface->dim * surface->vertex;
+
+	surface->data = malloc(4 * size);
+	fread(surface->data, 4, size, file);
+
+	surface->norm = malloc(4 * size);
+	fread(surface->norm, 4, size, file);
+	return 0;
+}

src/load.c

@@ -0,0 +1,34 @@
+#include "main.h"
+#include <cglm/cam.h>
+#include <cglm/mat4.h>
+#include <cglm/quat.h>
+
+void fix_matrix_load(id_t shader, float ratio)
+{
+	mat4 m, n;
+	const int d = 7;
+
+	glm_lookat((vec3){0, 0, -d}, (vec3){0, 0, 0}, (vec3){0, 1, 0}, m);
+	glm_perspective(CGLM_PI / 6, ratio, d - 3, d + 3, n);
+	glm_mat4_mul(n, m, m);
+
+	load_mat4_to_shader(shader, "fix", (mat4_t)m);
+}
+
+void rot_matrix_load(id_t shader, quat_t q)
+{
+	mat4 m;
+	glm_quat_mat4(q, m);
+	load_mat4_to_shader(shader, "rot", (mat4_t)m);
+}
+
+void color_load(id_t shader, unsigned char color[4])
+{
+	float res[4];
+
+	res[0] = (float)color[0] / 0xff;
+	res[1] = (float)color[1] / 0xff;
+	res[2] = (float)color[2] / 0xff;
+	res[3] = (float)color[3] / 0xff;
+	load_float4_to_shader(shader, "color", res);
+}

src/main.c

@@ -1,5 +1,4 @@
 #include "main.h"
-#include "data/axis.h"
 #include "data/shaders.h"
 
 #include <stdio.h>
@@ -12,19 +11,33 @@
 #include <emscripten.h>
 #endif
 
-float *generate_data_surface(unsigned int, unsigned char *);
-float *generate_normals_surface(float *, unsigned char);
+#ifndef M_PI
+#define M_PI 3.14159
+#endif
+
+struct projection projection = {.x = 0, .y = 1, .z = 2, .w = 3, .mesh = NULL};
 
 const char *wname = "manigraph: manifold grapher";
+const char *input_map = 
+	"\n"
+	"DRAG AND DROP: Graph a klein file from the file system\n"
+	"LEFT-CLICK:    Rotate surface on DRAG direction\n"
+	"SCROLL:        Rotate surface on SCROLL direction\n"
+	"\n"
+	"W,S:        Rotate sufrace on X axis\n"
+	"A,D:        Rotate sufrace on Y axis\n"
+	"Q,E:        Rotate sufrace on Z axis\n"
+	"LEFT-RIGHT: Rotate sufrace Horizontally\n"
+	"UP-DOWN:    Rotate sufrace Vetrically\n"
+	"\n"
+	"Z:       Rotate W axis to X axis\n"
+	"X:       Rotate W axis to Y axis\n"
+	"C:       Rotate W axis to Z axis\n"
+	"1-9:     Rotate n axis to W axis\n"
+	"\n"
+;
 
-struct projection projection = {.x = 0, .y = 1, .z = 2, .w = 3};
-
-unsigned char palette[][4] = {
-	{0xEB, 0xD3, 0xF8, 0xff},
-	{0xEB, 0xD4, 0xF8, 0xff},
-	{0xEB, 0xD5, 0xF8, 0xff},
-	{0x7A, 0x1C, 0xAC, 0xff},
-};
+unsigned char color[4] = {0x2F, 0x3C, 0x7E, 0xff};
 
 void mlog(char *msg)
 {
@@ -34,39 +47,60 @@ void mlog(char *msg)
 }
 
 window_t window;
-mesh_t m_surface, m_axis;
 id_t shader, shader_plain;
 
+extern volatile unsigned char animate_index;
+
 #ifndef EMSCRIPTEN
 static inline
 #endif
-void main_loop(void)
+
+	void
+	main_loop(void)
 {
 	quat_t q;
 
 	q = poll_input(window);
-	load_rot_matrix(shader, q);
-	load_rot_matrix(shader_plain, q);
 
+	rot_matrix_load(shader, q);
+	rot_matrix_load(shader_plain, q);
+	color_load(shader, color);
+	color_load(shader_plain, color);
+
+	{
+		static float angle = 0;
+
+		if (angle > M_PI / 2)
+		{
+			animate_index = 0;
+			angle = 0;
+
+			load_float_to_shader(shader, "angle", angle);
+			load_float_to_shader(shader_plain, "angle", angle);
+			set_projection_mesh(projection);
+		}
+
+		if (animate_index)
+		{
+			load_float_to_shader(shader, "i", animate_index - 1);
+			load_float_to_shader(shader_plain, "i", animate_index - 1);
+
+			angle += 0.01;
+			load_float_to_shader(shader, "angle", angle);
+			load_float_to_shader(shader_plain, "angle", angle);
+		}
+	}
 	clean_context();
 
-#ifndef DEBUG
-	load_mdl_matrix(shader_plain, 0, 0);
-	draw_mesh(m_axis);
-	load_mdl_matrix(shader_plain, 1, 1);
-	draw_mesh(m_axis);
-	load_mdl_matrix(shader_plain, 2, 2);
-	draw_mesh(m_axis);
-	load_mdl_matrix(shader, 0, 3);
-#else
-	load_mdl_matrix(shader_plain, 0, 3);
-#endif
-	draw_mesh(m_surface);
+	if (!projection.mesh)
+		return;
+
+	draw_mesh(shader, projection.mesh);
+	draw_mesh_lines(shader_plain, projection.mesh);
 }
 
 int main(void)
 {
-	id_t texture;
 
 	mlog("[VENTANA] Inicializando...\n");
 	{
@@ -86,13 +120,7 @@ int main(void)
 			mlog("[CONTEXT] Error al inicializar...\n");
 			goto error_context;
 		}
-		set_clean_color_context(0x2E, 0x07, 0x3F);
-	}
-
-	mlog("[TEXTURE] Inicializando...\n");
-	{
-		texture = create_palette_texture(palette, 4);
-		use_texture(texture);
+		set_clean_color_context(0xFF, 0xFF, 0xFF);
 	}
 
 	mlog("[SHADER] Inicializando...\n");
@@ -104,7 +132,7 @@ int main(void)
 		}
 		load_program_to_shader(shader, vs, VERTEX);
 		load_program_to_shader(shader, fs, FRAGMENT);
-		load_fix_matrix(shader, (float)WIDTH / HEIGHT);
+		fix_matrix_load(shader, (float)WIDTH / HEIGHT);
 	}
 
 	mlog("[SHADER] Inicializando...\n");
@@ -116,42 +144,17 @@ int main(void)
 		}
 		load_program_to_shader(shader_plain, vs, VERTEX);
 		load_program_to_shader(shader_plain, fs_plain, FRAGMENT);
-		load_fix_matrix(shader_plain, (float)WIDTH / HEIGHT);
+		fix_matrix_load(shader_plain, (float)WIDTH / HEIGHT);
 	}
 
-	mlog("[MESH] Inicializando...\n");
-	{
-		unsigned char m;
-		float *n_surface, *d_surface;
-		d_surface = generate_data_surface(16, &m);
-		n_surface = generate_normals_surface(d_surface, m);
-
-		projection.m = m;
-
-		if (!(m_surface = create_mesh(d_surface, n_surface, m)))
-		{
-			mlog("[MESH] Error al inicializar...\n");
-			goto error_mesh_surface;
-		}
-
-		projection.mesh = m_surface;
-
-		free(n_surface);
-		free(d_surface);
-	}
-
-	mlog("[MESH] Inicializando...\n");
-	{
-		if (!(m_axis = create_mesh(d_axis, NULL, 3)))
-		{
-			mlog("[MESH] Error al inicializar...\n");
-			goto error_mesh_axis;
-		}
-	}
+	mlog("[INPUTS] Imprimiendo...\n");
+	printf(input_map);
 
 	mlog("[MAIN LOOP] Inicializando...\n");
+
 #ifdef EMSCRIPTEN
-	emscripten_set_main_loop(&main_loop, 0, 1);
+	emscripten_set_main_loop(&main_loop, 60, 1);
+	return 0;
 #else
 	while (is_open_window(window))
 		main_loop();
@@ -159,34 +162,22 @@ int main(void)
 	mlog("[MAIN LOOP] Terminando...\n");
 
 	mlog("[MESH] Destruyendo...\n");
-	destroy_mesh(m_axis);
-	mlog("[MESH] Destruyendo...\n");
-	destroy_mesh(m_surface);
+	destroy_mesh(projection.mesh);
 	mlog("[SHADER] Destruyendo...\n");
 	destroy_shader(shader_plain);
 	mlog("[SHADER] Destruyendo...\n");
 	destroy_shader(shader);
-	mlog("[TEXTURE] Destruyendo...\n");
-	destroy_texture(texture);
 	mlog("[WINDOW] Destruyendo...\n");
 	close_window(window);
 	return 0;
 
-	mlog("[MESH] Destruyendo...\n");
-	destroy_mesh(m_axis);
-error_mesh_axis:
-	mlog("[MESH] Destruyendo...\n");
-	destroy_mesh(m_surface);
-error_mesh_surface:
+error_context:
 	mlog("[SHADER] Destruyendo...\n");
 	destroy_shader(shader_plain);
 error_shader_plain:
 	mlog("[SHADER] Destruyendo...\n");
 	destroy_shader(shader);
 error_shader:
-	mlog("[TEXTURE] Destruyendo...\n");
-	destroy_texture(texture);
-error_context:
 	mlog("[WINDOW] Destruyendo...\n");
 	close_window(window);
 error_window:

src/main.h

@@ -4,16 +4,17 @@
 	error of the shaders.
 */
 
-/* #define DEBUG */
-/* #define GLAD  */
+#include <stdint.h>
+#define DEBUG
+#define GLFW_INCLUDE_NONE
 
-typedef const void * window_t;
+typedef const void *window_t;
 typedef unsigned int id_t;
-typedef void * mesh_t;
-typedef float * quat_t;
-typedef float * mat4_t;
+typedef void *mesh_t;
+typedef float *quat_t;
+typedef float *mat4_t;
 
-/* 
+/*
 	This struct represent the proyection, where:
 		mesh: data of surface.
 		m: the dimention of the surface.
@@ -29,14 +30,32 @@ struct projection
 	unsigned char m, x, y, z, w;
 };
 
-/* 
+/*
+	this structure has all the information to generate
+	a mesh, where:
+		data: the buffer with the vertex coords
+		norm: the buffer with the norm coords
+		vertex: the number of vertex
+		dim: the dimentions of the surface
+*/
+
+struct surface
+{
+	float *data, *norm;
+	uint64_t vertex;
+	uint8_t dim;
+};
+
+/*
 	Init window:
 		w: default width;
 		h: default height;
 		name: Name of the window.
 */
 
-window_t init_window(unsigned int w, unsigned int h, const char * name);
+int create_surface_klein( unsigned char *, struct surface *  );
+
+window_t init_window(unsigned int w, unsigned int h, const char *name);
 
 void use_window(window_t window);
 
@@ -44,20 +63,22 @@ int is_open_window(window_t window);
 
 void close_window(window_t window);
 
-/* 
+/*
 	Create mesh:
 		d: array of floats with the vertex data.
 		n: array of floats with the normal data.
 		m: Dimention of mesh
 */
 
-mesh_t create_mesh( float * d, float * n, unsigned char m );
+mesh_t create_mesh(struct surface);
 
-void set_projection_mesh( struct projection );
+void set_projection_mesh(struct projection);
 
 void destroy_mesh(mesh_t p);
 
-void draw_mesh(mesh_t p);
+void draw_mesh(id_t, mesh_t p);
+
+void draw_mesh_lines(id_t, mesh_t p);
 
 /*
 	Set background color:
@@ -70,7 +91,7 @@ void set_clean_color_context(unsigned char r, unsigned char g, unsigned char b);
 
 void clean_context(void);
 
-int init_context( void );
+int init_context(void);
 
 void destroy_shader(id_t shader);
 
@@ -80,7 +101,8 @@ void use_shader(id_t shader);
 
 enum
 {
-	VERTEX, FRAGMENT
+	VERTEX,
+	FRAGMENT
 };
 
 /*
@@ -89,7 +111,8 @@ enum
 		type: VERTEX or FRAGMENT
 */
 
-unsigned char load_program_to_shader(id_t shader, const char * src, unsigned int type);
+unsigned char load_program_to_shader(
+	id_t shader, const char *src, unsigned int type);
 
 /*
 	load float to shader:
@@ -97,7 +120,23 @@ unsigned char load_program_to_shader(id_t shader, const char * src, unsigned int
 		f: float to load
 */
 
-void load_float_to_shader(id_t shader, char * var, float f);
+void load_float_to_shader(id_t shader, char *var, float f);
+
+/*
+	load unsigned int to shader:
+		var: name of glsl variable.
+		u: unsigned int to load
+*/
+
+void load_uint_to_shader(id_t shader, char *var, unsigned int u);
+
+/*
+	load float[4] to shader:
+		var: name of glsl variable.
+		f: float[4] to load
+*/
+
+void load_float4_to_shader(id_t shader, char *var, float f[4]);
 
 /*
 	load matrix 4 to shader:
@@ -105,32 +144,28 @@ void load_float_to_shader(id_t shader, char * var, float f);
 		m: Matrix to load
 */
 
-void load_mat4_to_shader(id_t shader, char * var, mat4_t m);
+void load_mat4_to_shader(id_t shader, char *var, mat4_t m);
 
 /*
 	Generate and load fix matrix, this matrix
 	has the information of the perspective and
 	camera information.
-		
+
 		ratio: default ratio of window.
 */
-void load_fix_matrix(id_t shader, float ratio);
-
-/*
-	Generate and load model matrix, it also sets the color
-	to draw.
-		i: From {0,1,2} select one of 3 ortogonal rotations,
-		   One for each axis.	
-		c: Color index of the pallete.
-*/
-void load_mdl_matrix(id_t shader, unsigned char i, unsigned char c);
+void fix_matrix_load(id_t shader, float ratio);
 
 /*
 	Generate and load rotation matrix.
 		q: quaterinon describing the rotation.
 */
 
-void load_rot_matrix(id_t shader, quat_t q);
+void rot_matrix_load(id_t shader, quat_t q);
+
+/*
+ */
+
+void color_load(id_t shader, unsigned char color[4]);
 
 id_t config_texture(unsigned short type);
 
@@ -143,6 +178,6 @@ void destroy_texture(id_t texture);
 		colors: array of color values (rgba in hex ).
 		n: number of color on colors.
 */
-id_t create_palette_texture(const unsigned char colors[][4], unsigned char n );
+id_t create_palette_texture(const unsigned char colors[][4], unsigned char n);
 
 quat_t poll_input(window_t window);

src/matrix.c

@@ -1,50 +0,0 @@
-#include "main.h"
-#include <cglm/cam.h>
-#include <cglm/mat4.h>
-#include <cglm/quat.h>
-
-mat4 ortho[] = {
-	{
-		{1, 0, 0, 0},
-		{0, 1, 0, 0},
-		{0, 0, 1, 0},
-		{0, 0, 0, 1},
-	},
-	{
-		{0, 1, 0, 0},
-		{-1, 0, 0, 0},
-		{0, 0, 1, 0},
-		{0, 0, 0, 1},
-	},
-	{
-		{0, 0, 1, 0},
-		{0, 1, 0, 0},
-		{-1, 0, 0, 0},
-		{0, 0, 0, 1},
-	},
-};
-
-void load_fix_matrix(id_t shader, float ratio)
-{
-	mat4 m, n;
-	const int d = 7;
-
-	glm_lookat((vec3){0, 0, -d}, (vec3){0, 0, 0}, (vec3){0, 1, 0}, m);
-	glm_perspective(CGLM_PI / 4, ratio, d - 3, d + 3, n);
-	glm_mat4_mul(n, m, m);
-
-	load_mat4_to_shader(shader, "fix", (mat4_t)m);
-}
-
-void load_mdl_matrix(id_t shader, unsigned char i, unsigned char c)
-{
-	load_float_to_shader(shader, "idx", c);
-	load_mat4_to_shader(shader, "mdl", (mat4_t)ortho[i]);
-}
-
-void load_rot_matrix(id_t shader, quat_t q)
-{
-	mat4 m;
-	glm_quat_mat4(q, m);
-	load_mat4_to_shader(shader, "rot", (mat4_t)m);
-}

src/mesh.c

@@ -1,9 +1,11 @@
 #include "main.h"
-#ifdef GLAD
-#include <glad.h>
+
+#ifdef EMSCRIPTEN
+#include <GL/gl.h>
 #else
-#include <GL/glew.h>
+#include <glad.h>
 #endif
+
 #include <stdio.h>
 #include <stdlib.h>
 
@@ -47,49 +49,34 @@ void set_projection_mesh(struct projection projection)
 	This trick can be done with glVertexAttribPointer.
 */
 
-mesh_t create_mesh(float *d, float *n, unsigned char m)
+mesh_t create_mesh(struct surface surface)
 {
 	unsigned char i;
 	struct obj *p;
 
 	p = malloc(sizeof(struct obj));
 
-	p->vertex = (*d) / m;
+	p->vertex = surface.vertex;
 
 	glGenVertexArrays(1, &p->vao);
 	glBindVertexArray(p->vao);
 
 	glGenBuffers(1, &p->d_vbo);
 	glBindBuffer(GL_ARRAY_BUFFER, p->d_vbo);
-	glBufferData(
-		GL_ARRAY_BUFFER, p->vertex * m * sizeof(float), d + 1, GL_STATIC_DRAW);
+	glBufferData(GL_ARRAY_BUFFER, p->vertex * surface.dim * sizeof(float),
+		surface.data, GL_STATIC_DRAW);
 
-	if (n)
+	if (surface.norm)
 	{
 		glGenBuffers(1, &p->n_vbo);
 		glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, p->n_vbo);
-		glBufferData(GL_ELEMENT_ARRAY_BUFFER, p->vertex * m * sizeof(float),
-			n + 1, GL_STATIC_DRAW);
+		glBufferData(GL_ELEMENT_ARRAY_BUFFER,
+			p->vertex * surface.dim * sizeof(float), surface.norm,
+			GL_STATIC_DRAW);
 	}
 
-	for (i = 0; i < 4; ++i)
-	{
+	for (i = 0; i < 8; ++i)
 		glEnableVertexAttribArray(i);
-		glEnableVertexAttribArray(i + 4);
-	}
-
-	{
-		struct projection projection = {
-			.x = 0,
-			.y = 1,
-			.z = 2,
-			.w = 3,
-		};
-
-		projection.m = m;
-		projection.mesh = p;
-		set_projection_mesh(projection);
-	}
 
 	return p;
 }
@@ -104,18 +91,28 @@ void destroy_mesh(mesh_t p)
 	free(p);
 }
 
-void draw_mesh(mesh_t p)
+void draw_mesh(id_t shader, mesh_t p)
 {
 	struct obj *obj = p;
 
+	glUseProgram(shader);
 	glBindVertexArray(obj->vao);
-#ifdef DEBUG
-	{
-		int i;
-		for (i = 0; i < obj->vertex; i += 3)
-			glDrawArrays(GL_LINE_LOOP, i, 3);
-	}
-#else
+#ifndef EMSCRIPTEN
+	glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
+#endif
 	glDrawArrays(GL_TRIANGLES, 0, obj->vertex);
+}
+void draw_mesh_lines(id_t shader, mesh_t p)
+{
+	struct obj *obj = p;
+
+	glLineWidth(4);
+	glUseProgram(shader);
+	glBindVertexArray(obj->vao);
+#ifndef EMSCRIPTEN
+	glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
+	glDrawArrays(GL_TRIANGLES, 0, obj->vertex);
+#else
+	glDrawArrays(GL_LINES, 0, obj->vertex);
 #endif
 }

src/shader.c

@@ -1,20 +1,20 @@
 #include "main.h"
 
-#ifdef GLAD
+#ifndef EMSCRIPTEN
 #include <glad.h>
 #else
-#include <GL/glew.h>
+#include <GL/gl.h>
 #endif
 
 #ifdef DEBUG
 #include <stdio.h>
 #endif
 
-void destroy_shader(unsigned int shader) { return glDeleteProgram(shader); }
+void destroy_shader(unsigned int shader) { glDeleteProgram(shader); }
 
 unsigned int create_shader(void) { return glCreateProgram(); }
 
-void use_shader(unsigned int program) { return glUseProgram(program); }
+void use_shader(unsigned int program) { glUseProgram(program); }
 
 unsigned char load_program_to_shader(
 	unsigned int program, const char *src, unsigned int i)
@@ -59,3 +59,10 @@ void load_mat4_to_shader(unsigned int program, char *var, float *mat)
 	glUseProgram(program);
 	glUniformMatrix4fv(glGetUniformLocation(program, var), 1, 0, mat);
 }
+
+void load_float4_to_shader(unsigned int program, char *var, float float4[4])
+{
+	glUseProgram(program);
+	glUniform4f(glGetUniformLocation(program, var), float4[0], float4[1],
+		float4[2], float4[3]);
+}

src/surface.c

@@ -1,234 +0,0 @@
-#include <complex.h>
-#include <math.h>
-#include <stdlib.h>
-
-#define CGLM_ALL_UNALIGNED
-#include <cglm/vec3.h>
-#include <cglm/vec4.h>
-
-#ifndef M_PI
-#define M_PI 3.14159265358979323846
-#endif
-
-#ifndef CMPLX
-#define CMPLX(a,b) (a+I*b)
-#endif
-
-void riemman(float *d_surface, int * coords, int grid_size)
-{
-	complex double eq;
-	float u = 2 * ((float)coords[0] / grid_size) - 1;
-	float v = 2 * ((float)coords[1] / grid_size) - 1;
-
-	eq = csqrt(CMPLX(u,v));
-
-	d_surface[0] = u;
-	d_surface[1] = v;
-	d_surface[2] = creal(eq);
-	d_surface[3] = cimag(eq);
-}
-
-
-void cube( float *d_surface, int * coord, int grid_size )
-{
-	unsigned char i;
-
-	for(int i=0; i<4; i++ )
-		d_surface[i]=(float)coord[i]/grid_size;
-}
-
-void mobius(float *d_surface, int * coord, int grid_size)
-{
-	const float width = 0.5;
-	float u = (2 * M_PI) * ((float)coord[0] / grid_size);
-	float v = (2 * width) * ((float)coord[1] / grid_size) - width;
-
-	d_surface[0] = cos(u) + v * cos(u / 2) * cos(u);
-	d_surface[1] = sin(u) + v * cos(u / 2) * sin(u);
-	d_surface[2] = v * sin(u / 2);
-}
-
-void torus(float *d_surface, int * coord, int grid_size)
-{
-	float u = (2 * M_PI) * ((float)coord[0] / grid_size);
-	float v = (2 * M_PI) * ((float)coord[1] / grid_size);
-
-	d_surface[0] = (1 + 0.5 * cos(v)) * cos(u);
-	d_surface[1] = (1 + 0.5 * cos(v)) * sin(u);
-	d_surface[2] = 0.5 * sin(v);
-}
-
-void klein(float *d_surface, int * coord, int grid_size)
-{
-	float u = (2 * M_PI) * ((float)coord[0] / grid_size);
-	float v = (2 * M_PI) * ((float)coord[1]/ grid_size);
-
-	d_surface[0] = (0.5 * cos(v) + 0.5) * cos(u);
-	d_surface[1] = (0.5 * cos(v) + 0.5) * sin(u);
-	d_surface[2] = sin(v) * cos(u / 2);
-	d_surface[3] = sin(v) * sin(u / 2);
-}
-
-typedef void (*function_t)(float *, int *, int);
-
-float *generate_data_surface(int grid_size, unsigned char *s)
-{
-	unsigned int i, j, k, o, p, l, n, m;
-	long size, q=0;
-	function_t f;
-	float *d_surface;
-
-	const int dim =2;
-	int cara[dim];
-	char bits[dim+1];
-	bits[dim]=0;
-
-	f =klein ;
-	*s = 4;
-
-	size = grid_size * grid_size * 6 * (*s) * 24;
-	d_surface = malloc((size + 1) * sizeof(float));
-	d_surface[0] = size;
-	
-	for(o = 0; o < dim; o ++)
-	{  
-		for (p = 0; p < o; p++)
-		{
-			for (k = 0; k < (1 << (dim-2)); k++)
-			{
-				unsigned char skip=0;
-				for(n = 0; n < dim-2; n++)
-				{
-					if( n==(o-1) || n==p )
-						skip++;
-
-					cara[n+skip] = (k & (1<<n))?grid_size:0;
-				}
-
-				for(i = 0; i < grid_size; i++)
-				{
-					for (j = 0; j < grid_size; j++)
-					{
-						cara[o] = i;
-						cara[p] = j;
-						f(&d_surface[q + 1], cara, grid_size);
-						q += *s;
-
-						cara[o] = i + 1;
-						cara[p] = j;
-						f(&d_surface[q + 1], cara, grid_size);
-						q += *s;
-
-						cara[o] = i + 1;
-						cara [p] = j + 1;
-						f(&d_surface[q + 1], cara, grid_size);
-						q += *s;
-
-						cara[o] = i;
-						cara [p] = j; 
-						f(&d_surface[q + 1], cara, grid_size);
-						q += *s;
-
-						cara[o] = i;
-						cara [p] = j + 1;
-						f(&d_surface[q + 1], cara, grid_size);
-						q += *s;
-
-						cara[o] = i + 1;
-						cara [p] = j + 1;
-						f(&d_surface[q + 1], cara, grid_size);
-						q += *s;
-					}
-				}
-			}	
-		}
-	}
-
-	return d_surface;
-}
-
-
-
-static void __calculate_normal(
-	float *p1, float *p2, float *p3, float *normal, unsigned char n)
-{
-	float alpha;
-	vec4 v1, v2, v3;
-	vec4 u1, u2, u3;
-
-	switch (n)
-	{
-	case 3:
-
-		glm_vec3_sub(p2, p1, v1);
-		glm_vec3_sub(p3, p1, v2);
-
-		glm_vec3_cross(v1, v2, normal);
-		glm_vec3_normalize(normal);
-		return;
-
-	case 4:
-
-		/*
-			In Grant-Shmidth we need 3 linearly independian vector that forms a
-		   basis, so we can have a ortonormal version of that basis, since, we
-		   must have v1 = p3 - p1 v2 = p2 - p1 Then v3 = p1, will most certantly
-		   be linerly independiant to v1 and v2.
-		*/
-		glm_vec4_sub(p2, p1, v1);
-		glm_vec4_sub(p3, p1, v2);
-		glm_vec4_copy(p1, v3);
-
-		/* Setup U1 */
-		{
-			glm_vec4_copy(v1, u1);
-		}
-
-		/* Setup U2 */
-		{
-			vec4 proj;
-
-			alpha = glm_vec4_dot(v2, u1) / glm_vec4_dot(u1, u1);
-			glm_vec4_scale(u1, alpha, proj);
-
-			glm_vec4_sub(v2, proj, u2);
-		}
-
-		/* Setup U3 */
-		{
-			vec4 proj1, proj2;
-
-			alpha = glm_vec4_dot(v3, u1) / glm_vec4_dot(u1, u1);
-			glm_vec4_scale(u1, alpha, proj1);
-
-			alpha = glm_vec4_dot(v3, u2) / glm_vec4_dot(u2, u2);
-			glm_vec4_scale(u2, alpha, proj2);
-
-			glm_vec4_sub(v3, proj1, u3);
-			glm_vec4_sub(u3, proj2, u3);
-		}
-
-		glm_vec4_copy(u3, normal);
-		glm_vec4_normalize(normal);
-		return;
-	}
-}
-
-float *generate_normals_surface(float *d, unsigned char m)
-{
-	float *n;
-	n = malloc((*d + 1) * sizeof(float));
-	*n = *d;
-	for (int i = 0; i < *d; i += 3 * m)
-	{
-
-		vec4 norm_vec;
-
-		__calculate_normal(
-			(d + 1) + i, (d + 1) + i + m, (d + 1) + i + 2 * m, norm_vec, m);
-		glm_vec3_copy(norm_vec, (n + 1) + i);
-		glm_vec3_copy(norm_vec, (n + 1) + i + m);
-		glm_vec3_copy(norm_vec, (n + 1) + i + 2 * m);
-	}
-	return n;
-}

src/texture.c

@@ -1,38 +0,0 @@
-#include "main.h"
-#ifdef GLAD
-#include <glad.h>
-#else
-#include <GL/glew.h>
-#endif
-
-#define TYPE GL_TEXTURE_2D_ARRAY
-
-static id_t __config_texture(unsigned short type)
-{
-	id_t texture;
-
-	glGenTextures(1, &texture);
-	glBindTexture(TYPE, texture);
-
-	{
-		glTexParameteri(TYPE, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
-		glTexParameteri(TYPE, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
-	}
-
-	return texture;
-}
-
-void use_texture(id_t texture) { return glBindTexture(TYPE, texture); }
-
-void destroy_texture(unsigned int texture)
-{
-	return glDeleteTextures(1, &texture);
-}
-
-id_t create_palette_texture(const unsigned char colors[][4], unsigned char n)
-{
-	id_t texture = __config_texture(TYPE);
-	glTexImage3D(
-		TYPE, 0, GL_RGBA, 1, 1, n, 0, GL_RGBA, GL_UNSIGNED_BYTE, colors);
-	return texture;
-}

src/window.c

@@ -4,9 +4,12 @@
 #include <time.h>
 
 void __window_callback_input(GLFWwindow *, int, int);
+void __cursor_callback_input(GLFWwindow *, double, double);
 void __mouse_callback_input(GLFWwindow *, int, int, int);
 void __scroll_callback_input(GLFWwindow *, double, double);
 void __key_callback_input(GLFWwindow *, int, int, int, int);
+void __drop_callback_input(GLFWwindow *, int, const char **);
+void __error_callback_input(int, const char *);
 
 window_t init_window(unsigned int w, unsigned int h, const char *name);
 
@@ -32,8 +35,12 @@ static void __limit_fps_window(int max_fps)
 		struct timespec sleep_time;
 		sleep_time.tv_sec = 0;
 		sleep_time.tv_nsec = (long)((frame_time - elapsed_time) * 1e9);
-		nanosleep(&sleep_time, NULL);
 
+#ifdef _WIN32
+		usleep(sleep_time.tv_nsec/1000);
+#else
+		nanosleep(&sleep_time, NULL);
+#endif
 		current_time = glfwGetTime();
 	}
 
@@ -43,6 +50,7 @@ static void __limit_fps_window(int max_fps)
 window_t init_window(unsigned int width, unsigned int height, const char *title)
 {
 	window_t window;
+	glfwSetErrorCallback(__error_callback_input);
 
 	if (!glfwInit())
 		return NULL;
@@ -50,6 +58,7 @@ window_t init_window(unsigned int width, unsigned int height, const char *title)
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
 	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+	glfwWindowHint(GLFW_OPENGL_DEBUG_CONTEXT, 1); 
 
 	window = (window_t)glfwCreateWindow(width, height, title, NULL, NULL);
 	if (!(window))
@@ -61,11 +70,11 @@ window_t init_window(unsigned int width, unsigned int height, const char *title)
 	glfwMakeContextCurrent((GLFWwindow *)(window));
 
 	glfwSetWindowSizeCallback((GLFWwindow *)window, __window_callback_input);
+	glfwSetCursorPosCallback((GLFWwindow *)window, __cursor_callback_input);
 	glfwSetMouseButtonCallback((GLFWwindow *)window, __mouse_callback_input);
 	glfwSetScrollCallback((GLFWwindow *)window, __scroll_callback_input);
 	glfwSetKeyCallback((GLFWwindow *)window, __key_callback_input);
-
-	__window_callback_input((GLFWwindow *)window, width, height);
+	glfwSetDropCallback((GLFWwindow *)window, __drop_callback_input);
 
 	return window;
 }