void warpin_batch_draw_face( int texture, 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;
}
batch_add_tri(texture, TMAP_FLAG_TEXTURED | TMAP_HTL_3D_UNLIT | TMAP_FLAG_EMISSIVE, vertlist, 1.0f);
}
void trail_add_batch(trail * trailp)
{
int sections[NUM_TRAIL_SECTIONS];
int num_sections = 0;
int i;
vec3d topv, botv, *fvec, last_pos, tmp_fvec;
vertex top, bot, top_prev, bot_prev;
float w;
ubyte l;
vec3d centerv;
if (trailp->tail == trailp->head)
return;
// if this trail is on the player ship, and he's in any padlock view except rear view, don't draw
if ((Player_ship != NULL) && trail_is_on_ship(trailp, Player_ship) &&
(Viewer_mode & (VM_PADLOCK_UP | VM_PADLOCK_LEFT | VM_PADLOCK_RIGHT)))
{
return;
}
trail_info *ti = &trailp->info;
int n = trailp->tail;
do {
n--;
if (n < 0)
n = NUM_TRAIL_SECTIONS - 1;
if (trailp->val[n] > 1.0f)
break;
sections[num_sections++] = n;
} while (n != trailp->head);
if (num_sections <= 0)
return;
Assertion(ti->texture.bitmap_id != -1, "Weapon trail %s could not be loaded", ti->texture.filename); // We can leave this as an assert, but tell them how to fix it. --Chief
memset(&top, 0, sizeof(vertex));
memset(&bot, 0, sizeof(vertex));
memset(&top_prev, 0, sizeof(vertex));
memset(&bot_prev, 0, sizeof(vertex));
float w_size = (ti->w_end - ti->w_start);
float a_size = (ti->a_end - ti->a_start);
int num_faded_sections = ti->n_fade_out_sections;
for (i = 0; i < num_sections; i++) {
n = sections[i];
float init_fade_out = 1.0f;
if ((num_faded_sections > 0) && (i < num_faded_sections)) {
init_fade_out = ((float)i) / (float)num_faded_sections;
}
w = trailp->val[n] * w_size + ti->w_start;
if (init_fade_out != 1.0f) {
l = (ubyte)fl2i((trailp->val[n] * a_size + ti->a_start) * 255.0f * init_fade_out * init_fade_out);
}
else {
l = (ubyte)fl2i((trailp->val[n] * a_size + ti->a_start) * 255.0f);
}
if (i == 0) {
if (num_sections > 1) {
vm_vec_sub(&tmp_fvec, &trailp->pos[n], &trailp->pos[sections[i + 1]]);
vm_vec_normalize_safe(&tmp_fvec);
fvec = &tmp_fvec;
}
else {
fvec = &tmp_fvec;
fvec->xyz.x = 0.0f;
fvec->xyz.y = 0.0f;
fvec->xyz.z = 1.0f;
}
}
else {
vm_vec_sub(&tmp_fvec, &last_pos, &trailp->pos[n]);
vm_vec_normalize_safe(&tmp_fvec);
fvec = &tmp_fvec;
}
trail_calc_facing_pts(&topv, &botv, fvec, &trailp->pos[n], w);
if (!Cmdline_nohtl) {
g3_transfer_vertex(&top, &topv);
g3_transfer_vertex(&bot, &botv);
}
else {
g3_rotate_vertex(&top, &topv);
g3_rotate_vertex(&bot, &botv);
}
top.r = top.g = top.b = l;
bot.r = bot.g = bot.b = l;
top.a = bot.a = l;
float U = i2fl(i);
top.texture_position.u = U;
top.texture_position.v = 1.0f;
bot.texture_position.u = U;
bot.texture_position.v = 0.0f;
if (i > 0) {
if (i == num_sections - 1) {
// Last one...
vm_vec_avg(¢erv, &topv, &botv);
vertex center_vert = vertex();
if (!Cmdline_nohtl)
g3_transfer_vertex(¢er_vert, ¢erv);
else
g3_rotate_vertex(¢er_vert, ¢erv);
center_vert.texture_position.u = U + 1.0f;
center_vert.texture_position.v = 0.5f;
center_vert.a = center_vert.r = center_vert.g = center_vert.b = l;
vertex tri[3];
tri[1] = top_prev;
tri[2] = bot_prev;
tri[0] = center_vert;
batch_add_tri(
ti->texture.bitmap_id,
TMAP_FLAG_TEXTURED | TMAP_FLAG_ALPHA | TMAP_FLAG_GOURAUD | TMAP_FLAG_RGB | TMAP_HTL_3D_UNLIT,
tri,
1.0f
);
} else {
vertex quad[4];
quad[0] = top_prev;
quad[1] = bot_prev;
quad[2] = bot;
quad[3] = top;
batch_add_quad(
ti->texture.bitmap_id,
TMAP_FLAG_TEXTURED | TMAP_FLAG_ALPHA | TMAP_FLAG_GOURAUD | TMAP_FLAG_RGB | TMAP_HTL_3D_UNLIT,
quad,
1.0f
);
}
}
last_pos = trailp->pos[n];
top_prev = top;
bot_prev = bot;
}
}
