/**
* 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);
}
}
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 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 );
}
bool do_facing_check(vms_vector *norm,g3s_point **vertlist,vms_vector *p)
{
if (norm) { //have normal
Assert(norm->x || norm->y || norm->z);
return g3_check_normal_facing(p,norm);
}
else { //normal not specified, so must compute
vms_vector tempv;
//get three points (rotated) and compute normal
vm_vec_perp(&tempv,&vertlist[0]->p3_vec,&vertlist[1]->p3_vec,&vertlist[2]->p3_vec);
return (vm_vec_dot(&tempv,&vertlist[1]->p3_vec) < 0);
}
}
