Merge: alan -> main

src/data/axis.h

@@ -6,6 +6,7 @@
 #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,

src/main.c

@@ -1,9 +1,10 @@
 #include "main.h"
-#include "data/cube.h"
 #include "data/axis.h"
 #include "data/shaders.h"
+#include <stdlib.h>
 #include <GL/glew.h>
 #include <stdlib.h>
+
 #include <cglm/vec3.h>
 
 #define WIDTH 512
@@ -49,6 +50,7 @@ float * fill_normal( float * d )
 }
 
 const char * wname = "manigraph: manifold grapher";
+float * generate_surface();
 
 int main( void )
 {
@@ -82,11 +84,13 @@ int main( void )
 
 	/* Fill m_cube */
 	{
-		float * n_cube;
+		float * n_cube, *d_cube;
+		d_cube = generate_surface(16);
 		n_cube = fill_normal( d_cube );
 		if( !( m_cube = create_mesh( d_cube, n_cube, coordanate ) ) )
 			goto error_mesh_cube; 
 		free( n_cube );
+		free( d_cube);
 	}
 
 	/* Fill m_axis */
@@ -116,8 +120,10 @@ int main( void )
 		load_mdl_matrix( shader_plain, 2, 2 );
 		draw_mesh( m_axis );
 #endif
+
 		load_mdl_matrix( shader, 0, 3 );
 		draw_mesh( m_cube );
+
 	}
 
 	destroy_mesh( m_axis );

src/surface.c

@@ -0,0 +1,92 @@
+#include <stdio.h>
+#include <math.h>
+#include <stdlib.h>
+
+#ifndef M_PI
+#define M_PI 3.14159265358979323846
+#endif
+
+typedef void(*function_t)(float*,int, int, int);
+
+void mobius(float *d_surface, int i, int j, int grid_size)
+{
+	const float width = 0.5;
+	float u = (2*M_PI) * ((float)i/grid_size );
+	float v = (2*width) * ((float)j/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 toro(float *d_surface, int i, int j, int grid_size)
+{
+	float u = (2*M_PI) * ((float)i/grid_size );
+	float v = (2*M_PI) * ((float)j/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 i, int j, int grid_size)
+{
+	float u = (2*M_PI) * ((float)i/grid_size );
+	float v = (2*M_PI) * ((float)j/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[2] = sin(v)*sin(u/2);
+}
+
+float * generate_surface(int grid_size)
+{
+	long size = grid_size*grid_size*2*3*3*2;
+	function_t f = klein;
+	float * d_surface;
+	int k=0;
+
+	d_surface = malloc((size+1)*sizeof(float));
+	d_surface[0] = size;
+
+	for (int i = 0; i < grid_size; i++)
+	{ 
+		for (int j = 0; j < grid_size; j++)
+		{
+			// triangle 1, front
+			f(&d_surface[k + 1], i, j, grid_size);
+			k+=3;
+			f(&d_surface[k + 1], i + 1, j, grid_size);
+			k+=3;
+			f(&d_surface[k + 1], i + 1, j + 1, grid_size);
+			k+=3;
+
+			// triangle 1, back
+			f(&d_surface[k + 1], i + 1, j + 1, grid_size);
+			k+=3;
+			f(&d_surface[k + 1], i + 1, j, grid_size);
+			k+=3;
+			f(&d_surface[k + 1], i, j, grid_size);
+			k+=3;
+
+			// triangle 2, font
+			f(&d_surface[k + 1], i, j, grid_size);
+			k+=3;
+			f(&d_surface[k + 1], i, j + 1, grid_size);
+			k+=3;
+			f(&d_surface[k + 1], i + 1, j + 1, grid_size);
+			k+=3;
+
+			// triangle 2, back
+			f(&d_surface[k + 1], i + 1, j + 1, grid_size);
+			k+=3;
+			f(&d_surface[k + 1], i, j + 1, grid_size);
+			k+=3;
+			f(&d_surface[k + 1], i, j, grid_size);
+			k+=3;
+		}
+	}
+
+	return d_surface;
+}