nuclear@12: #include <stdlib.h>
nuclear@12: #include "ggen.h"
nuclear@12: #include "mesh.h"
nuclear@12: 
nuclear@12: #define X1	65536
nuclear@12: #define VERTEX(x, y, z)	\
nuclear@12: 	do { \
nuclear@12: 		*vptr++ = x; \
nuclear@12: 		*vptr++ = y; \
nuclear@12: 		*vptr++ = z; \
nuclear@12: 	} while(0)
nuclear@12: 
nuclear@13: #define COLOR(r, g, b) \
nuclear@13: 	do { \
nuclear@13: 		*cptr++ = r; \
nuclear@13: 		*cptr++ = g; \
nuclear@13: 		*cptr++ = b; \
nuclear@13: 	} while(0)
nuclear@13: 
nuclear@12: int gen_box(struct mesh *m)
nuclear@12: {
nuclear@13: 	int i;
nuclear@14: 	int num_faces = 12;
nuclear@14: 	int num_verts = num_faces * 3;
nuclear@12: 	int32_t v[8][3] = {
nuclear@12: 		{-X1, -X1, -X1}, {X1, -X1, -X1}, {X1, -X1, X1}, {-X1, -X1, X1},
nuclear@12: 		{-X1, X1, -X1}, {X1, X1, -X1}, {X1, X1, X1}, {-X1, X1, X1}
nuclear@12: 	};
nuclear@13: 	int32_t *vptr, *cptr;
nuclear@12: 
nuclear@12: 
nuclear@14: 	m->prim = X3D_TRIANGLES;
nuclear@12: 	m->nverts = num_verts;
nuclear@13: 	if(!(m->verts = malloc(num_verts * 3 * sizeof *m->verts))) {
nuclear@12: 		return -1;
nuclear@12: 	}
nuclear@12: 	vptr = m->verts;
nuclear@12: 
nuclear@13: 	if(!(m->colors = malloc(num_verts * 3 * sizeof *m->colors))) {
nuclear@13: 		return -1;
nuclear@13: 	}
nuclear@13: 	cptr = m->colors;
nuclear@13: 
nuclear@12: 	/* -Y */
nuclear@12: 	VERTEX(v[0][0], v[0][1], v[0][2]);
nuclear@12: 	VERTEX(v[1][0], v[1][1], v[1][2]);
nuclear@12: 	VERTEX(v[2][0], v[2][1], v[2][2]);
nuclear@14: 	for(i=0; i<3; i++) COLOR(32768, 0, 32768);
nuclear@14: 
nuclear@14: 	VERTEX(v[0][0], v[0][1], v[0][2]);
nuclear@14: 	VERTEX(v[2][0], v[2][1], v[2][2]);
nuclear@12: 	VERTEX(v[3][0], v[3][1], v[3][2]);
nuclear@14: 	for(i=0; i<3; i++) COLOR(65536, 0, 65536);
nuclear@13: 
nuclear@12: 	/* +Y */
nuclear@14: 	VERTEX(v[7][0], v[7][1], v[7][2]);
nuclear@14: 	VERTEX(v[6][0], v[6][1], v[6][2]);
nuclear@14: 	VERTEX(v[5][0], v[5][1], v[5][2]);
nuclear@14: 	for(i=0; i<3; i++) COLOR(0, 32768, 0);
nuclear@14: 
nuclear@14: 	VERTEX(v[7][0], v[7][1], v[7][2]);
nuclear@14: 	VERTEX(v[5][0], v[5][1], v[5][2]);
nuclear@12: 	VERTEX(v[4][0], v[4][1], v[4][2]);
nuclear@14: 	for(i=0; i<3; i++) COLOR(0, 65536, 0);
nuclear@13: 
nuclear@12: 	/* -Z */
nuclear@12: 	VERTEX(v[0][0], v[0][1], v[0][2]);
nuclear@12: 	VERTEX(v[4][0], v[4][1], v[4][2]);
nuclear@12: 	VERTEX(v[5][0], v[5][1], v[5][2]);
nuclear@14: 	for(i=0; i<3; i++) COLOR(32768, 32768, 0);
nuclear@14: 
nuclear@14: 	VERTEX(v[0][0], v[0][1], v[0][2]);
nuclear@14: 	VERTEX(v[5][0], v[5][1], v[5][2]);
nuclear@12: 	VERTEX(v[1][0], v[1][1], v[1][2]);
nuclear@14: 	for(i=0; i<3; i++) COLOR(65536, 65536, 0);
nuclear@13: 
nuclear@12: 	/* +Z */
nuclear@12: 	VERTEX(v[2][0], v[2][1], v[2][2]);
nuclear@12: 	VERTEX(v[6][0], v[6][1], v[6][2]);
nuclear@12: 	VERTEX(v[7][0], v[7][1], v[7][2]);
nuclear@14: 	for(i=0; i<3; i++) COLOR(0, 0, 32768);
nuclear@14: 
nuclear@14: 	VERTEX(v[2][0], v[2][1], v[2][2]);
nuclear@14: 	VERTEX(v[7][0], v[7][1], v[7][2]);
nuclear@12: 	VERTEX(v[3][0], v[3][1], v[3][2]);
nuclear@14: 	for(i=0; i<3; i++) COLOR(0, 0, 65536);
nuclear@13: 
nuclear@12: 	/* +X */
nuclear@12: 	VERTEX(v[1][0], v[1][1], v[1][2]);
nuclear@12: 	VERTEX(v[5][0], v[5][1], v[5][2]);
nuclear@12: 	VERTEX(v[6][0], v[6][1], v[6][2]);
nuclear@14: 	for(i=0; i<3; i++) COLOR(32768, 0, 0);
nuclear@14: 
nuclear@14: 	VERTEX(v[1][0], v[1][1], v[1][2]);
nuclear@14: 	VERTEX(v[6][0], v[6][1], v[6][2]);
nuclear@12: 	VERTEX(v[2][0], v[2][1], v[2][2]);
nuclear@14: 	for(i=0; i<3; i++) COLOR(65536, 0, 0);
nuclear@13: 
nuclear@12: 	/* -X */
nuclear@12: 	VERTEX(v[3][0], v[3][1], v[3][2]);
nuclear@12: 	VERTEX(v[7][0], v[7][1], v[7][2]);
nuclear@12: 	VERTEX(v[4][0], v[4][1], v[4][2]);
nuclear@14: 	for(i=0; i<3; i++) COLOR(0, 32768, 32768);
nuclear@14: 
nuclear@14: 	VERTEX(v[3][0], v[3][1], v[3][2]);
nuclear@14: 	VERTEX(v[4][0], v[4][1], v[4][2]);
nuclear@12: 	VERTEX(v[0][0], v[0][1], v[0][2]);
nuclear@14: 	for(i=0; i<3; i++) COLOR(0, 65536, 65536);
nuclear@12: 
nuclear@12: 	return 0;
nuclear@12: }