/**
* Render one triangle of a shield hit effect on one ship.
* Each frame, the triangle needs to be rotated into global coords.
*
* @param trip pointer to triangle in global array
* @param orient orientation of object shield is associated with
* @param pos center point of object
* @param r Red colour
* @param g Green colour
* @param b Blue colour
*/
void render_shield_triangle(gshield_tri *trip, matrix *orient, vec3d *pos, ubyte r, ubyte g, ubyte b)
{
int j;
vec3d pnt;
vertex *verts[3];
vertex points[3];
if (trip->trinum == -1)
return; // Means this is a quad, must have switched detail_level.
for (j=0; j<3; j++ ) {
// Rotate point into world coordinates
vm_vec_unrotate(&pnt, &trip->verts[j].pos, orient);
vm_vec_add2(&pnt, pos);
// Pnt is now the x,y,z world coordinates of this vert.
// For this example, I am just drawing a sphere at that point.
if (!Cmdline_nohtl) g3_transfer_vertex(&points[j],&pnt);
else g3_rotate_vertex(&points[j], &pnt);
points[j].texture_position.u = trip->verts[j].u;
points[j].texture_position.v = trip->verts[j].v;
Assert((trip->verts[j].u >= 0.0f) && (trip->verts[j].u <= UV_MAX));
Assert((trip->verts[j].v >= 0.0f) && (trip->verts[j].v <= UV_MAX));
verts[j] = &points[j];
}
verts[0]->r = r;
verts[0]->g = g;
verts[0]->b = b;
verts[1]->r = r;
verts[1]->g = g;
verts[1]->b = b;
verts[2]->r = r;
verts[2]->g = g;
verts[2]->b = b;
vec3d norm;
Poly_count++;
vm_vec_perp(&norm,&verts[0]->world,&verts[1]->world,&verts[2]->world);
int flags=TMAP_FLAG_TEXTURED | TMAP_FLAG_RGB | TMAP_FLAG_GOURAUD;
if (!Cmdline_nohtl) flags |= TMAP_HTL_3D_UNLIT;
if ( vm_vec_dot(&norm,&verts[1]->world ) >= 0.0 ) {
vertex *vertlist[3];
vertlist[0] = verts[2];
vertlist[1] = verts[1];
vertlist[2] = verts[0];
g3_draw_poly( 3, vertlist, flags);
} else {
g3_draw_poly( 3, verts, flags);
}
}
void render_low_detail_shield_bitmap(gshield_tri *trip, matrix *orient, vec3d *pos, ubyte r, ubyte g, ubyte b)
{
int j;
vec3d pnt;
vertex verts[4];
for (j=0; j<4; j++ ) {
// Rotate point into world coordinates
vm_vec_unrotate(&pnt, &trip->verts[j].pos, orient);
vm_vec_add2(&pnt, pos);
// Pnt is now the x,y,z world coordinates of this vert.
if(!Cmdline_nohtl) g3_transfer_vertex(&verts[j], &pnt);
else g3_rotate_vertex(&verts[j], &pnt);
verts[j].texture_position.u = trip->verts[j].u;
verts[j].texture_position.v = trip->verts[j].v;
}
verts[0].r = r;
verts[0].g = g;
verts[0].b = b;
verts[1].r = r;
verts[1].g = g;
verts[1].b = b;
verts[2].r = r;
verts[2].g = g;
verts[2].b = b;
verts[3].r = r;
verts[3].g = g;
verts[3].b = b;
vec3d norm;
vm_vec_perp(&norm, &trip->verts[0].pos, &trip->verts[1].pos, &trip->verts[2].pos);
vertex *vertlist[4];
if ( vm_vec_dot(&norm, &trip->verts[1].pos ) < 0.0 ) {
vertlist[0] = &verts[3];
vertlist[1] = &verts[2];
vertlist[2] = &verts[1];
vertlist[3] = &verts[0];
g3_draw_poly( 4, vertlist, TMAP_FLAG_TEXTURED | TMAP_FLAG_RGB | TMAP_FLAG_GOURAUD | TMAP_HTL_3D_UNLIT);
} else {
vertlist[0] = &verts[0];
vertlist[1] = &verts[1];
vertlist[2] = &verts[2];
vertlist[3] = &verts[3];
g3_draw_poly( 4, vertlist, TMAP_FLAG_TEXTURED | TMAP_FLAG_RGB | TMAP_FLAG_GOURAUD | TMAP_HTL_3D_UNLIT);
}
}
//like g3_draw_poly(), but checks to see if facing. If surface normal is
//NULL, this routine must compute it, which will be slow. It is better to
//pre-compute the normal, and pass it to this function. When the normal
//is passed, this function works like g3_check_normal_facing() plus
//g3_draw_poly().
//returns -1 if not facing, 1 if off screen, 0 if drew
bool g3_check_and_draw_poly(int nv,g3s_point **pointlist,vms_vector *norm,vms_vector *pnt)
{
if (do_facing_check(norm,pointlist,pnt))
return g3_draw_poly(nv,pointlist);
else
return 255;
}
//draw a polygon that is always facing you
//returns 1 if off screen, 0 if drew
bool g3_draw_rod_flat(g3s_point *bot_point,fix bot_width,g3s_point *top_point,fix top_width)
{
if (calc_rod_corners(bot_point,bot_width,top_point,top_width))
return 0;
return g3_draw_poly(4,rod_point_list);
}
void draw_face( vertex *v1, vertex *v2, vertex *v3 )
{
vec3d norm;
vertex *vertlist[3];
vm_vec_perp(&norm,&v1->world, &v2->world, &v3->world);
if ( vm_vec_dot(&norm, &v1->world ) >= 0.0 ) {
vertlist[0] = v3;
vertlist[1] = v2;
vertlist[2] = v1;
} else {
vertlist[0] = v1;
vertlist[1] = v2;
vertlist[2] = v3;
}
g3_draw_poly( 3, vertlist, TMAP_FLAG_TEXTURED | TMAP_HTL_3D_UNLIT );
}
//calls the object interpreter to render an object. The object renderer
//is really a seperate pipeline. returns true if drew
bool g3_draw_polygon_model(ubyte *p,grs_bitmap **model_bitmaps,vms_angvec *anim_angles,g3s_lrgb model_light,fix *glow_values)
{
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,vp(p+4),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],vp(p+8),n);
p += n*sizeof(struct vms_vector) + 8;
break;
}
case OP_FLATPOLY: {
int nv = w(p+2);
Assert( nv < MAX_POINTS_PER_POLY );
if (g3_check_normal_facing(vp(p+4),vp(p+16)) > 0) {
int i;
#ifdef FADE_FLATPOLY
short c;
unsigned char cc;
int l;
#endif
// DPH: Now we treat this color as 15bpp
// gr_setcolor(w(p+28));
#ifndef FADE_FLATPOLY
gr_setcolor(gr_find_closest_color_15bpp(w(p + 28)));
#else
//l = (32 * model_light) >> 16;
l = f2i(fixmul(i2f(32), (model_light.r+model_light.g+model_light.b)/3));
if (l<0) l = 0;
else if (l>32) l = 32;
cc = gr_find_closest_color_15bpp(w(p+28));
c = gr_fade_table[(l<<8)|cc];
gr_setcolor(c);
#endif
for (i=0;i<nv;i++)
point_list[i] = Interp_point_list + wp(p+30)[i];
g3_draw_poly(nv,point_list);
}
p += 30 + ((nv&~1)+1)*2;
break;
}
case OP_TMAPPOLY: {
int nv = w(p+2);
g3s_uvl *uvl_list;
Assert( nv < MAX_POINTS_PER_POLY );
if (g3_check_normal_facing(vp(p+4),vp(p+16)) > 0) {
int i;
g3s_lrgb light, *lrgb_list;
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++)
{
uvl_list[i].l = (light.r+light.g+light.b)/3;
lrgb_list[i].r = light.r;
lrgb_list[i].g = light.g;
lrgb_list[i].b = light.b;
}
for (i=0;i<nv;i++)
point_list[i] = Interp_point_list + wp(p+30)[i];
g3_draw_tmap(nv,point_list,uvl_list,lrgb_list,model_bitmaps[w(p+28)]);
d_free(lrgb_list);
}
p += 30 + ((nv&~1)+1)*2 + nv*12;
break;
}
case OP_SORTNORM:
if (g3_check_normal_facing(vp(p+16),vp(p+4)) > 0) { //facing
//draw back then front
g3_draw_polygon_model(p+w(p+30),model_bitmaps,anim_angles,model_light,glow_values);
g3_draw_polygon_model(p+w(p+28),model_bitmaps,anim_angles,model_light,glow_values);
}
else { //not facing. draw front then back
g3_draw_polygon_model(p+w(p+28),model_bitmaps,anim_angles,model_light,glow_values);
g3_draw_polygon_model(p+w(p+30),model_bitmaps,anim_angles,model_light,glow_values);
}
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;
default:
Error("invalid polygon model\n");
}
return 1;
}
//calls the object interpreter to render an object. The object renderer
//is really a seperate pipeline. returns true if drew
bool g3_draw_polygon_model(void *model_ptr, grs_bitmap **model_bitmaps, vms_angvec *anim_angles, fix model_light, fix *glow_values) {
ubyte *p = (ubyte*)model_ptr;
int current_poly = 0;
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, vp(p + 4), 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], vp(p + 8), n);
p += n*sizeof(struct vms_vector) + 8;
break;
}
case OP_FLATPOLY: {
int nv = w(p + 2);
Assert(nv < MAX_POINTS_PER_POLY);
if (g3_check_normal_facing(vp(p + 4), vp(p + 16)) > 0) {
int i;
gr_setcolor(w(p + 28));
for (i = 0; i<nv; i++)
point_list[i] = Interp_point_list + wp(p + 30)[i];
g3_draw_poly(nv, point_list);
}
p += 30 + ((nv&~1) + 1) * 2;
break;
}
case OP_TMAPPOLY: {
int nv = w(p + 2);
g3s_uvl *uvl_list;
Assert(nv < MAX_POINTS_PER_POLY);
if (g3_check_normal_facing(vp(p + 4), vp(p + 16)) > 0) {
int i;
fix light;
//calculate light from surface normal
if (glow_num < 0) { //no glow
light = -vm_vec_dot(&View_matrix.fvec, vp(p + 16));
light = f1_0 / 4 + (light * 3) / 4;
light = fixmul(light, model_light);
}
else { //yes glow
light = 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++)
uvl_list[i].l = light;
for (i = 0; i<nv; i++)
point_list[i] = Interp_point_list + wp(p + 30)[i];
g3_draw_tmap(nv, point_list, uvl_list, model_bitmaps[w(p + 28)]);
}
p += 30 + ((nv&~1) + 1) * 2 + nv * 12;
break;
}
case OP_SORTNORM:
if (g3_check_normal_facing(vp(p + 16), vp(p + 4)) > 0) { //facing
//draw back then front
g3_draw_polygon_model(p + w(p + 30), model_bitmaps, anim_angles, model_light, glow_values);
g3_draw_polygon_model(p + w(p + 28), model_bitmaps, anim_angles, model_light, glow_values);
}
else { //not facing. draw front then back
g3_draw_polygon_model(p + w(p + 28), model_bitmaps, anim_angles, model_light, glow_values);
g3_draw_polygon_model(p + w(p + 30), model_bitmaps, anim_angles, model_light, glow_values);
}
p += 32;
break;
case OP_RODBM: {
g3s_point rod_bot_p, rod_top_p;
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), f1_0);
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;
default:
Int3();
}
return 1;
}
