//put a cube on the screen
draw_cube()
{
int i,sn;
short cube_vert_nums[9];
//find 8 free vertices
for (i=0;i<9;i++) {
int vn;
vn = cube_vert_nums[i] = alloc_vert();
vm_vec_add(&Vertices[vn],&cube_position,&cube_coords[i]);
}
g3_rotate_list(9,cube_vert_nums);
//fudge perspecive by using z value from cube center for all verts
for (i=0;i<8;i++)
Segment_points[cube_vert_nums[i]].z = Segment_points[cube_vert_nums[8]].z;
//draw six sides
for (sn=0;sn<6;sn++) {
short side_vert_nums[4];
for (i=0;i<4;i++) side_vert_nums[3-i] = cube_vert_nums[Side_to_verts[sn][i]];
// gr_setcolor(sn+1);
// g3_check_and_draw_poly(4,side_vert_nums,NULL);
g3_check_and_draw_tmap(4,side_vert_nums,cube_uvls,Texture[39+sn]->bitmap,NULL);
}
//free 8 free vertices
for (i=0;i<8;i++) free_vert(cube_vert_nums[i]);
}
//alternate interpreter for morphing object
bool g3_draw_morphing_model(ubyte *p,grs_bitmap **model_bitmaps,vms_angvec *anim_angles,g3s_lrgb model_light,vms_vector *new_points)
{
fix *glow_values = NULL;
glow_num = -1; //glow off by default
while (w(p) != OP_EOF)
switch (w(p)) {
case OP_DEFPOINTS: {
int n = w(p+2);
rotate_point_list(Interp_point_list,new_points,n);
p += n*sizeof(struct vms_vector) + 4;
break;
}
case OP_DEFP_START: {
int n = w(p+2);
int s = w(p+4);
rotate_point_list(&Interp_point_list[s],new_points,n);
p += n*sizeof(struct vms_vector) + 8;
break;
}
case OP_FLATPOLY: {
int nv = w(p+2);
int i,ntris;
gr_setcolor(w(p+28));
for (i=0;i<2;i++)
point_list[i] = Interp_point_list + wp(p+30)[i];
for (ntris=nv-2;ntris;ntris--) {
point_list[2] = Interp_point_list + wp(p+30)[i++];
g3_check_and_draw_poly(3,point_list,NULL,NULL);
point_list[1] = point_list[2];
}
p += 30 + ((nv&~1)+1)*2;
break;
}
case OP_TMAPPOLY: {
int nv = w(p+2);
g3s_uvl *uvl_list;
g3s_lrgb light, *lrgb_list;
g3s_uvl morph_uvls[3];
int i,ntris;
MALLOC(lrgb_list, g3s_lrgb, nv);
//calculate light from surface normal
if (glow_num < 0) //no glow
{
light.r = light.g = light.b = -vm_vec_dot(&View_matrix.fvec,vp(p+16));
light.r = f1_0/4 + (light.r*3)/4;
light.r = fixmul(light.r,model_light.r);
light.g = f1_0/4 + (light.g*3)/4;
light.g = fixmul(light.g,model_light.g);
light.b = f1_0/4 + (light.b*3)/4;
light.b = fixmul(light.b,model_light.b);
}
else //yes glow
{
light.r = light.g = light.b = glow_values[glow_num];
glow_num = -1;
}
//now poke light into l values
uvl_list = (g3s_uvl *) (p+30+((nv&~1)+1)*2);
for (i=0;i<nv;i++)
{
lrgb_list[i].r = light.r;
lrgb_list[i].g = light.g;
lrgb_list[i].b = light.b;
}
for (i=0;i<3;i++)
morph_uvls[i].l = (light.r+light.g+light.b)/3;
for (i=0;i<2;i++) {
point_list[i] = Interp_point_list + wp(p+30)[i];
morph_uvls[i].u = uvl_list[i].u;
morph_uvls[i].v = uvl_list[i].v;
}
for (ntris=nv-2;ntris;ntris--) {
point_list[2] = Interp_point_list + wp(p+30)[i];
morph_uvls[2].u = uvl_list[i].u;
morph_uvls[2].v = uvl_list[i].v;
i++;
g3_check_and_draw_tmap(3,point_list,uvl_list,lrgb_list,model_bitmaps[w(p+28)],NULL,NULL);
point_list[1] = point_list[2];
morph_uvls[1].u = morph_uvls[2].u;
morph_uvls[1].v = morph_uvls[2].v;
}
p += 30 + ((nv&~1)+1)*2 + nv*12;
d_free(lrgb_list);
break;
}
case OP_SORTNORM:
if (g3_check_normal_facing(vp(p+16),vp(p+4)) > 0) { //facing
//draw back then front
g3_draw_morphing_model(p+w(p+30),model_bitmaps,anim_angles,model_light,new_points);
g3_draw_morphing_model(p+w(p+28),model_bitmaps,anim_angles,model_light,new_points);
}
else { //not facing. draw front then back
g3_draw_morphing_model(p+w(p+28),model_bitmaps,anim_angles,model_light,new_points);
g3_draw_morphing_model(p+w(p+30),model_bitmaps,anim_angles,model_light,new_points);
}
p += 32;
break;
case OP_RODBM: {
g3s_point rod_bot_p,rod_top_p;
g3s_lrgb rodbm_light = { f1_0, f1_0, f1_0 };
g3_rotate_point(&rod_bot_p,vp(p+20));
g3_rotate_point(&rod_top_p,vp(p+4));
g3_draw_rod_tmap(model_bitmaps[w(p+2)],&rod_bot_p,w(p+16),&rod_top_p,w(p+32),rodbm_light);
p+=36;
break;
}
case OP_SUBCALL: {
vms_angvec *a;
if (anim_angles)
a = &anim_angles[w(p+2)];
else
a = &zero_angles;
g3_start_instance_angles(vp(p+4),a);
g3_draw_polygon_model(p+w(p+16),model_bitmaps,anim_angles,model_light,glow_values);
g3_done_instance();
p += 20;
break;
}
case OP_GLOW:
if (glow_values)
glow_num = w(p+2);
p += 4;
break;
}
return 1;
}