Merge branch 'klein'

Makefile

@@ -2,20 +2,23 @@ BIN = manigraph
 
 OBJ = \
 	ext/glad/glad.o \
-	src/surface.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.o
+
 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 = \
@@ -30,17 +33,16 @@ WAYLAND-LIB = \
 	wayland
 
 help:
-	@echo "Para compilar el proyecto a tu sistema operativo"
+	@echo "Usage:"
-	@echo "porfavor usa uno de los siguientes comandos:"
 	@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 "Clean"
 	@echo "	$(MAKE) clean"
 
-src/main.o: src/data/axis.h src/data/shaders.h
+src/main.o: src/data/shaders.h
 
 windows: $(OBJ) 
 	cd ext; $(MAKE) -f glfw.mk windows; cd -
@@ -63,7 +65,7 @@ cocoa: $(OBJ)
 	$(CC) -framework OpenGL -o $(BIN) $(OBJ) ext/glfw.a -lGL -lglfw 
 
 wasm: $(OBJ)
-	$(CC) -sUSE_WEBGL2=1 -sUSE_GLFW=3 -o $(BIN).js $(OBJ)
+	$(CC) -sUSE_WEBGL2=1 -sUSE_GLFW=3 -o $(BIN).html $(OBJ)
 	chmod -x $(BIN).wasm
 
 libglfw.so: 
@@ -74,7 +76,9 @@ clean:
 	cd ext; $(MAKE) -f glfw.mk clean; cd -
 
 
+examples: $(EXAMPLES)
+
 .SUFFIXES: .c .o 
 
 .c.o:
-	$(CC) $(CFLAGS) -c -o $@ $<
+	$(CC) -Wno-implicit-function-declaration $(CFLAGS) -c -o $@ $<

example/basic.c

@@ -0,0 +1,92 @@
+#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 = (2 * M_PI) * ((float)coord[0] / grid[0]);
+	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 < 3; ++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/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 = 4;
+
+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, "%03d-cube.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;
+}

include/klein/klein.h

@@ -0,0 +1,48 @@
+#ifdef KLEIN_H
+#error file included twice
+#endif
+#define KLEIN_H
+
+#ifdef KLEIN_IMPLEMENT
+#include <stdio.h>
+#include <stdlib.h>
+#endif
+
+struct klein
+{
+	unsigned long vertex_size;
+	float *vertex, *normals;
+	unsigned char 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, 16, klein.vertex_size * klein.dim, file);
+	fwrite(klein.normals, 16, klein.vertex_size * klein.dim, file);
+
+	fclose(file);
+	return 0;
+}
+#endif

include/klein/norm.h

@@ -0,0 +1,118 @@
+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);
+}

include/klein/parm.h

@@ -0,0 +1,134 @@
+#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 int __factorial(int n)
+{
+	if (n == 1)
+		return 1;
+
+	return n * __factorial(n - 1);
+}
+
+static inline int __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 int i, j, k, o, p, n;
+	unsigned long 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;
+	{
+		unsigned char test = 0;
+		for (o = 0; o < parm.m; o++)
+		{
+			for (p = 0; p < o; p++)
+			{
+				test += 1;
+				klein->vertex_size += parm.grid[p] * parm.grid[o] * 6 * __face(parm.m);
+			}
+		}
+		klein->vertex_size /= test;
+	}
+
+	size = (klein->dim) * (klein->vertex_size);
+	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 < (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 & (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

@@ -3,12 +3,8 @@
 #ifdef EMSCRIPTEN
 #include <GL/gl.h>
 #else
-#ifdef GLAD
 #include <glad.h>
 #include <GLFW/glfw3.h>
-#else
-#include <GL/glew.h>
-#endif
 #endif
 
 void set_clean_color_context(unsigned char r, unsigned char g, unsigned char b)
@@ -22,12 +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;"
@@ -15,94 +15,84 @@ const char * vs =
 	"layout (location = 6) in float aNormal_z;"
 	"layout (location = 7) in float aNormal_w;"
 
-	"uniform uint idx;"
-
-	"uniform uint i;"
 	"uniform float angle;"
+	"uniform float i;"
+	"uniform vec4 color;"
 
 	"uniform mat4 fix;"
 	"uniform mat4 rot;"
-	"uniform mat4 mdl;"
 
-	"flat out uint index;"
 	"out vec3 Normal;"
 	"out vec3 FragPos;"
+	"out vec4 Color;"
 
 	"mat2 rotate2d( float angle )"
 	"{"
-		"return mat2( cos(angle), sin(angle), -sin(angle), cos(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);"
 
-	"	aNormal[i] = (vec2(aNormal[i], aNormal_w) * rotate2d(angle))[0];"
+	"	aNormal[int(i)] = (vec2(aNormal[int(i)], aNormal_w) * "
-	"	aPos[i] = (vec2(aPos[i], aPos_w) * rotate2d(angle))[0];"
+	"rotate2d(angle))[0];"
+	"	aPos[int(i)] = (vec2(aPos[int(i)], aPos_w) * rotate2d(angle))[0];"
 
-	"	Normal = mat3(transpose(inverse(rot*mdl))) * aNormal;"
+	"	Normal = mat3(transpose(inverse(rot))) * aNormal;"
-	"	gl_Position = fix * rot * mdl * vec4( aPos, 1.0 );\n"
+	"	gl_Position = fix * rot * vec4( aPos, 1.0 );\n"
-	"	FragPos = vec3( rot * mdl * vec4(aPos, 1.0));"
+	"	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;"
-
-	"flat in uint index;"
 	"out vec4 FragColor;"
 	"in vec3 Normal;"
 	"in vec3 FragPos;"
+	"in vec4 Color;"
 
 	"void main()"
 	"{"
-	"	vec4 color = texture( palette, vec3(0,0,index)).rgba;"
+	"	FragColor = vec4(pow(vec3(Color),vec3(1.0/2.2)),Color.a);"
-	"	FragColor = vec4(pow(vec3(color),vec3(1.0/2.2)),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;"
 
-    "flat in uint index;"
+	"out vec4 FragColor;"
-    "in vec3 Normal;"
-    "in vec3 FragPos;"
 
-    "out vec4 FragColor;"
+	"void main()"
+	"{"
 
-    "void main()"
+	"   vec3 viewPos = vec3(0, 0, -15);\n"
-    "{"
+	"   vec3 viewDir = normalize(viewPos - FragPos);\n"
-    "   vec4 color = texture(palette, vec3(0, 0, index));\n"
 
-    "   vec3 viewPos = vec3(0, 0, -15);\n"
+	"   vec3 lightPos = viewPos;\n"
-    "   vec3 viewDir = normalize(viewPos - FragPos);\n"
+	"   vec3 lightDir = normalize(lightPos - FragPos);\n"
 
-    "   vec3 lightPos = viewPos;\n"
+	"   vec3 halfwayDir = normalize(lightDir + viewDir);\n"
-    "   vec3 lightDir = normalize(lightPos - FragPos);\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(abs(dot(normalize(Normal), halfwayDir)), 32.0);\n"
+	"   vec3 result = pow((0.5 + 0.5*diffuse + 1.5*specular) * Color.rgb, "
-    "   float diffuse = abs(dot(normalize(Normal), lightDir));\n"
+	"vec3(1.0/2.2));\n"
-
+	"   FragColor = vec4(result, Color.a);\n"
-    "   vec3 result = pow((0.5 + 0.5*diffuse + 1.5*specular) * color.rgb, vec3(1.0/2.2));\n"
+	"}";
-    "   FragColor = vec4(result, color.a);\n"
-    "}";

src/input.c

@@ -128,6 +128,23 @@ void __scroll_callback_input(GLFWwindow *window, double xoffset, double yoffset)
 	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;

src/klein.c

@@ -0,0 +1,44 @@
+#include "main.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 a long 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(16 * size);
+	fread(surface->data, 16, size, file);
+
+	surface->norm = malloc(16 * size);
+	fread(surface->norm, 16, 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>
@@ -16,19 +15,11 @@
 #define M_PI 3.14159
 #endif
 
-float *generate_data_surface(unsigned char *);
+struct projection projection = {.x = 0, .y = 1, .z = 2, .w = 3, .mesh = NULL};
-float *generate_normals_surface(float *, unsigned char);
-
-struct projection projection = {.x = 0, .y = 1, .z = 2, .w = 3};
 
 const char *wname = "manigraph: manifold grapher";
 
-unsigned char palette[][4] = {
+unsigned char color[4] = {0x2F, 0x3C, 0x7E, 0xff};
-	{0xEB, 0xD3, 0xF8, 0xff},
-	{0xEB, 0xD4, 0xF8, 0xff},
-	{0xEB, 0xD5, 0xF8, 0xff},
-	{0x2F, 0x3C, 0x7E, 0xff},
-};
 
 void mlog(char *msg)
 {
@@ -38,9 +29,7 @@ void mlog(char *msg)
 }
 
 window_t window;
-mesh_t m_surface, m_axis;
 id_t shader, shader_plain;
-unsigned char m;
 
 extern volatile unsigned char animate_index;
 
@@ -55,8 +44,10 @@ static inline
 
 	q = poll_input(window);
 
-	load_rot_matrix(shader, q);
+	rot_matrix_load(shader, q);
-	load_rot_matrix(shader_plain, q);
+	rot_matrix_load(shader_plain, q);
+	color_load(shader, color);
+	color_load(shader_plain, color);
 
 	{
 		static float angle = 0;
@@ -73,8 +64,8 @@ static inline
 
 		if (animate_index)
 		{
-			load_uint_to_shader(shader, "i", animate_index - 1);
+			load_float_to_shader(shader, "i", animate_index - 1);
-			load_uint_to_shader(shader_plain, "i", animate_index - 1);
+			load_float_to_shader(shader_plain, "i", animate_index - 1);
 
 			angle += 0.01;
 			load_float_to_shader(shader, "angle", angle);
@@ -83,24 +74,15 @@ static inline
 	}
 	clean_context();
 
-#ifndef DEBUG
+	if (!projection.mesh)
-	load_mdl_matrix(shader_plain, 0, 0);
+		return;
-	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);
-#endif
-	load_mdl_matrix(shader, 0, 3);
-	draw_mesh(m_surface);
 
-	load_mdl_matrix(shader_plain, 0, 3);
+	draw_mesh(shader, projection.mesh);
-	draw_mesh_lines(m_surface);
+	draw_mesh_lines(shader_plain, projection.mesh);
 }
 
 int main(void)
 {
-	id_t texture;
 
 	mlog("[VENTANA] Inicializando...\n");
 	{
@@ -123,12 +105,6 @@ int main(void)
 		set_clean_color_context(0xFF, 0xFF, 0xFF);
 	}
 
-	mlog("[TEXTURE] Inicializando...\n");
-	{
-		texture = create_palette_texture(palette, 4);
-		use_texture(texture);
-	}
-
 	mlog("[SHADER] Inicializando...\n");
 	{
 		if (!(shader = create_shader()))
@@ -138,7 +114,7 @@ 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");
@@ -150,36 +126,7 @@ 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");
-	{
-		float *n_surface, *d_surface;
-		d_surface = generate_data_surface(&m);
-		n_surface = generate_normals_surface(d_surface, m);
-
-		if (!(m_surface = create_mesh(d_surface, n_surface, m)))
-		{
-			mlog("[MESH] Error al inicializar...\n");
-			goto error_mesh_surface;
-		}
-
-		projection.m = m;
-		projection.mesh = m_surface;
-		set_projection_mesh(projection);
-
-		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("[MAIN LOOP] Inicializando...\n");
@@ -193,34 +140,22 @@ int main(void)
 	mlog("[MAIN LOOP] Terminando...\n");
 
 	mlog("[MESH] Destruyendo...\n");
-	destroy_mesh(m_axis);
+	destroy_mesh(projection.mesh);
-	mlog("[MESH] Destruyendo...\n");
-	destroy_mesh(m_surface);
 	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");
+error_context:
-	destroy_mesh(m_axis);
-error_mesh_axis:
-	mlog("[MESH] Destruyendo...\n");
-	destroy_mesh(m_surface);
-error_mesh_surface:
 	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 +4,15 @@
 	error of the shaders.
 */
 
-/* #define DEBUG */
+#define DEBUG
-#define GLAD 
 
-typedef const void * window_t;
+typedef const void *window_t;
 typedef unsigned int id_t;
-typedef void * mesh_t;
+typedef void *mesh_t;
-typedef float * quat_t;
+typedef float *quat_t;
-typedef float * mat4_t;
+typedef float *mat4_t;
 
-/* 
+/*
 	This struct represent the proyection, where:
 		mesh: data of surface.
 		m: the dimention of the surface.
@@ -29,14 +28,32 @@ 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;
+	unsigned long vertex;
+	unsigned char 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);
 
@@ -44,22 +61,22 @@ 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(mesh_t p);
+void draw_mesh_lines(id_t, mesh_t p);
 
 /*
 	Set background color:
@@ -72,7 +89,7 @@ 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);
 
@@ -82,7 +99,8 @@ void use_shader(id_t shader);
 
 enum
 {
-	VERTEX, FRAGMENT
+	VERTEX,
+	FRAGMENT
 };
 
 /*
@@ -91,7 +109,8 @@ 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:
@@ -99,7 +118,7 @@ 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:
@@ -107,7 +126,15 @@ void load_float_to_shader(id_t shader, char * var, float f);
 		u: unsigned int to load
 */
 
-void load_uint_to_shader(id_t shader, char * var, unsigned int u);
+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:
@@ -115,32 +142,28 @@ void load_uint_to_shader(id_t shader, char * var, unsigned int u);
 		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);
+void fix_matrix_load(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);
 
 /*
 	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);
 
@@ -153,12 +176,6 @@ 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);
-
-#ifdef EMSCRIPTEN 
-#ifdef GLAD
-#error undefine GLAD on src/main.h please
-#endif
-#endif

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 / 6, 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_uint_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>
 
@@ -47,36 +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(
+	glBufferData(GL_ARRAY_BUFFER, p->vertex * surface.dim * sizeof(float),
-		GL_ARRAY_BUFFER, p->vertex * m * sizeof(float), d + 1, GL_STATIC_DRAW);
+		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),
+		glBufferData(GL_ELEMENT_ARRAY_BUFFER,
-			n + 1, GL_STATIC_DRAW);
+			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);
-	}
 
 	return p;
 }
@@ -91,19 +91,27 @@ 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);
+#ifndef EMSCRIPTEN
 	glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
+#endif
 	glDrawArrays(GL_TRIANGLES, 0, obj->vertex);
 }
-void draw_mesh_lines(mesh_t p)
+void draw_mesh_lines(id_t shader, mesh_t p)
 {
 	struct obj *obj = p;
 
+	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)
@@ -54,14 +54,15 @@ void load_float_to_shader(unsigned int program, char *var, float f)
 	glUniform1f(glGetUniformLocation(program, var), f);
 }
 
-void load_uint_to_shader(unsigned int program, char *var, unsigned int u)
-{
-	glUseProgram(program);
-	glUniform1ui(glGetUniformLocation(program, var), u);
-}
-
 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

@@ -1,309 +0,0 @@
-#include <complex.h>
-#include <math.h>
-#include <stdlib.h>
-#include <string.h>
-
-#define TEST
-
-#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
-
-#ifdef TEST
-#include <assert.h>
-#endif
-#include <stdio.h>
-
-typedef void (*function_t)(float *, int *, int);
-
-struct parm
-{
-	function_t f;
-	unsigned char m, n;
-	unsigned int grid;
-} parm;
-
-int factorial(int n)
-{
-	if (n == 1)
-		return 1;
-
-	return n * factorial(n - 1);
-}
-
-int numero_caras(int n)
-{
-	if (n == 2)
-		return 1;
-
-	return (1 << (n - 3)) * factorial(n) / factorial(n - 2);
-}
-
-void riemman(float *d_surface, int *coords, int grid)
-{
-	complex double eq;
-	float u = 2 * ((float)coords[0] / grid) - 1;
-	float v = 2 * ((float)coords[1] / grid) - 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)
-{
-	int i;
-
-	for (i = 0; i < parm.m; i++)
-		d_surface[i] = (2 * (float)coord[i] / grid) - 1;
-
-	if (parm.m == 2)
-		d_surface[2] = 0;
-}
-
-void mobius(float *d_surface, int *coord, int grid)
-{
-	const float width = 0.5;
-	float u = (2 * M_PI) * ((float)coord[0] / grid);
-	float v = (2 * width) * ((float)coord[1] / grid) - 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)
-{
-	float u = (2 * M_PI) * ((float)coord[0] / grid);
-	float v = (2 * M_PI) * ((float)coord[1] / grid);
-
-	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)
-{
-	float u = (2 * M_PI) * ((float)coord[0] / grid);
-	float v = (2 * M_PI) * ((float)coord[1] / grid);
-
-	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);
-}
-
-float *generate_data_surface(unsigned char *s)
-{
-	unsigned int i, j, k, o, p, n;
-	long size, q = 0;
-	float *d_surface;
-	int *cara;
-
-	parm.f = klein;
-	parm.m = 2;
-	parm.n = 4;
-	parm.grid = 16;
-
-#ifdef TEST
-	assert(numero_caras(2) == 1);
-	assert(numero_caras(3) == 6);
-	assert(numero_caras(4) == 24);
-#endif
-
-	*s = parm.n;
-
-	cara = malloc(parm.m * sizeof(int));
-	size = parm.grid * parm.grid * 6 * (parm.n) * numero_caras(parm.m);
-	d_surface = malloc((size + 1) * sizeof(float));
-	d_surface[0] = size;
-
-	for (o = 0; o < parm.m; o++)
-	{
-		for (p = 0; p < o; p++)
-		{
-			for (k = 0; k < (1 << (parm.m - 2)); k++)
-			{
-				unsigned char skip = 0;
-				for (n = 0; n < parm.m; n++)
-				{
-					if (n == o || n == p)
-						skip++;
-
-					cara[n] = (k & (1 << (n - skip))) ? parm.grid : 0;
-				}
-
-				for (i = 0; i < parm.grid; i++)
-				{
-					for (j = 0; j < parm.grid; j++)
-					{
-						cara[p] = i;
-						cara[o] = j;
-						parm.f(&d_surface[q + 1], cara, parm.grid);
-						q += parm.n;
-
-						cara[p] = i + 1;
-						cara[o] = j;
-						parm.f(&d_surface[q + 1], cara, parm.grid);
-						q += parm.n;
-
-						cara[p] = i + 1;
-						cara[o] = j + 1;
-						parm.f(&d_surface[q + 1], cara, parm.grid);
-						q += parm.n;
-
-						cara[p] = i;
-						cara[o] = j;
-						parm.f(&d_surface[q + 1], cara, parm.grid);
-						q += parm.n;
-
-						cara[p] = i;
-						cara[o] = j + 1;
-						parm.f(&d_surface[q + 1], cara, parm.grid);
-						q += parm.n;
-
-						cara[p] = i + 1;
-						cara[o] = j + 1;
-						parm.f(&d_surface[q + 1], cara, parm.grid);
-						q += parm.n;
-					}
-				}
-			}
-		}
-	}
-#ifdef TEST
-	assert(q == size);
-#endif
-	return d_surface;
-}
-
-static 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;
-	}
-}
-
-float *generate_normals_surface(float *d, unsigned char m)
-{
-	float *n;
-	n = malloc((*d + 1) * sizeof(float));
-	*n = *d;
-
-	float *norm_vec;
-	norm_vec = malloc(m * sizeof(float));
-
-	for (int i = 0; i < *d; i += 3 * m)
-	{
-
-		__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);
-	}
-
-	free(norm_vec);
-	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

@@ -7,6 +7,7 @@ void __window_callback_input(GLFWwindow *, int, int);
 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 **);
 
 window_t init_window(unsigned int w, unsigned int h, const char *name);
 
@@ -64,6 +65,7 @@ window_t init_window(unsigned int width, unsigned int height, const char *title)
 	glfwSetMouseButtonCallback((GLFWwindow *)window, __mouse_callback_input);
 	glfwSetScrollCallback((GLFWwindow *)window, __scroll_callback_input);
 	glfwSetKeyCallback((GLFWwindow *)window, __key_callback_input);
+	glfwSetDropCallback((GLFWwindow *)window, __drop_callback_input);
 
 	__window_callback_input((GLFWwindow *)window, width, height);