void batching_add_point_bitmap(primitive_batch *batch, vertex *position, float rad, float angle, float depth)
{
Assert(batch->get_render_info().prim_type == PRIM_TYPE_POINTS);
float radius = rad;
radius *= 1.41421356f;//1/0.707, becase these are the points of a square or width and height rad
vec3d PNT(position->world);
vec3d fvec;
// get the direction from the point to the eye
vm_vec_sub(&fvec, &View_position, &PNT);
vm_vec_normalize_safe(&fvec);
// move the center of the sprite based on the depth parameter
if ( depth != 0.0f )
vm_vec_scale_add(&PNT, &PNT, &fvec, depth);
batch_vertex new_particle;
vec3d up;
vm_rot_point_around_line(&up, &vmd_y_vector, angle, &vmd_zero_vector, &vmd_z_vector);
new_particle.position = position->world;
new_particle.radius = radius;
new_particle.uvec = up;
batch->add_point_sprite(&new_particle);
}
void batching_add_point_bitmap(primitive_batch *batch, vertex *position, int orient, float rad, float depth)
{
Assert(batch->get_render_info().prim_type == PRIM_TYPE_POINTS);
float radius = rad;
radius *= 1.41421356f;//1/0.707, becase these are the points of a square or width and height rad
vec3d PNT(position->world);
vec3d fvec;
// get the direction from the point to the eye
vm_vec_sub(&fvec, &View_position, &PNT);
vm_vec_normalize_safe(&fvec);
// move the center of the sprite based on the depth parameter
if ( depth != 0.0f )
vm_vec_scale_add(&PNT, &PNT, &fvec, depth);
batch_vertex new_particle;
vec3d up = {{{ 0.0f, 1.0f, 0.0f }}};
new_particle.position = position->world;
new_particle.radius = radius;
int direction = orient % 4;
switch ( direction ) {
case 0:
up.xyz.x = 0.0f;
up.xyz.y = 1.0f;
up.xyz.z = 0.0f;
break;
case 1:
up.xyz.x = 0.0f;
up.xyz.y = -1.0f;
up.xyz.z = 0.0f;
break;
case 2:
up.xyz.x = -1.0f;
up.xyz.y = 0.0f;
up.xyz.z = 0.0f;
break;
case 3:
up.xyz.x = 1.0f;
up.xyz.y = 0.0f;
up.xyz.z = 0.0f;
break;
}
new_particle.uvec = up;
batch->add_point_sprite(&new_particle);
}
// Creates a bunch of particles. You pass a structure
// rather than a bunch of parameters.
void particle_emit( particle_emitter *pe, int type, int optional_data, float range )
{
int i, n;
if ( !Particles_enabled )
return;
int n1, n2;
// Account for detail
int percent = get_percent(Detail.num_particles);
//Particle rendering drops out too soon. Seems to be around 150 m. Is it detail level controllable? I'd like it to be 500-1000
float min_dist = 125.0f;
float dist = vm_vec_dist_quick( &pe->pos, &Eye_position ) / range;
if ( dist > min_dist ) {
percent = fl2i( i2fl(percent)*min_dist / dist );
if ( percent < 1 ) {
return;
}
}
//mprintf(( "Dist = %.1f, percent = %d%%\n", dist, percent ));
n1 = (pe->num_low*percent)/100;
n2 = (pe->num_high*percent)/100;
// How many to emit?
n = (rand() % (n2-n1+1)) + n1;
if ( n < 1 ) return;
for (i=0; i<n; i++ ) {
// Create a particle
vec3d tmp_vel;
vec3d normal; // What normal the particle emit arond
float radius = (( pe->max_rad - pe->min_rad ) * frand()) + pe->min_rad;
float speed = (( pe->max_vel - pe->min_vel ) * frand()) + pe->min_vel;
float life = (( pe->max_life - pe->min_life ) * frand()) + pe->min_life;
normal.xyz.x = pe->normal.xyz.x + (frand()*2.0f - 1.0f)*pe->normal_variance;
normal.xyz.y = pe->normal.xyz.y + (frand()*2.0f - 1.0f)*pe->normal_variance;
normal.xyz.z = pe->normal.xyz.z + (frand()*2.0f - 1.0f)*pe->normal_variance;
vm_vec_normalize_safe( &normal );
vm_vec_scale_add( &tmp_vel, &pe->vel, &normal, speed );
particle_create( &pe->pos, &tmp_vel, life, radius, type, optional_data );
}
}
void geometry_shader_batcher::draw_bitmap(vertex *position, int orient, float rad, float depth)
{
rad *= 1.41421356f;//1/0.707, becase these are the points of a square or width and height rad
vec3d PNT(position->world);
vec3d fvec;
// get the direction from the point to the eye
vm_vec_sub(&fvec, &View_position, &PNT);
vm_vec_normalize_safe(&fvec);
// move the center of the sprite based on the depth parameter
if ( depth != 0.0f )
vm_vec_scale_add(&PNT, &PNT, &fvec, depth);
particle_pnt new_particle;
vec3d up = {{{0.0f, 1.0f, 0.0f}}};
new_particle.position = position->world;
new_particle.size = rad;
int direction = orient % 4;
if ( direction == 1 ) {
up.xyz.x = 0.0f;
up.xyz.y = -1.0f;
up.xyz.z = 0.0f;
} else if ( direction == 2 ) {
up.xyz.x = -1.0f;
up.xyz.y = 0.0f;
up.xyz.z = 0.0f;
} else if ( direction == 3 ) {
up.xyz.x = 1.0f;
up.xyz.y = 0.0f;
up.xyz.z = 0.0f;
}
new_particle.up = up;
vertices.push_back(new_particle);
}
float g3_draw_laser_htl(vec3d* p0, float width1, vec3d* p1, float width2, int r, int g, int b, uint tmap_flags)
{
width1 *= 0.5f;
width2 *= 0.5f;
vec3d uvec, fvec, rvec, center, reye;
vm_vec_sub(&fvec, p0, p1);
vm_vec_normalize_safe(&fvec);
vm_vec_avg(¢er, p0, p1); //needed for the return value only
vm_vec_sub(&reye, &Eye_position, ¢er);
vm_vec_normalize(&reye);
vm_vec_crossprod(&uvec, &fvec, &reye);
vm_vec_normalize(&uvec);
vm_vec_crossprod(&fvec, &uvec, &reye);
vm_vec_normalize(&fvec);
// if(vm_vec_mag_squared(&uvec)==0) uvec.xyz.y = 1.0f; //in case fvec is exactly equal to matrx.rvec, stick some arbitrary value in uvec
//normalize new perpendicular vector
// vm_vec_normalize(&uvec);
//now recompute right vector, in case it wasn't entirely perpendiclar
vm_vec_crossprod(&rvec, &uvec, &fvec);
// Now have uvec, which is up vector and rvec which is the normal
// of the face.
int i;
vec3d start, end;
vm_vec_scale_add(&start, p0, &fvec, -width1);
vm_vec_scale_add(&end, p1, &fvec, width2);
vec3d vecs[4];
vertex pts[4];
vertex* ptlist[8] =
{
&pts[3],
&pts[2],
&pts[1],
&pts[0],
&pts[0],
&pts[1],
&pts[2],
&pts[3]
};
vm_vec_scale_add(&vecs[0], &start, &uvec, width1);
vm_vec_scale_add(&vecs[1], &end, &uvec, width2);
vm_vec_scale_add(&vecs[2], &end, &uvec, -width2);
vm_vec_scale_add(&vecs[3], &start, &uvec, -width1);
for (i = 0; i < 4; i++)
{
g3_transfer_vertex(&pts[i], &vecs[i]);
}
ptlist[0]->u = 0.0f;
ptlist[0]->v = 0.0f;
ptlist[1]->u = 1.0f;
ptlist[1]->v = 0.0f;
ptlist[2]->u = 1.0f;
ptlist[2]->v = 1.0f;
ptlist[3]->u = 0.0f;
ptlist[3]->v = 1.0f;
ptlist[0]->r = (ubyte)r;
ptlist[0]->g = (ubyte)g;
ptlist[0]->b = (ubyte)b;
ptlist[0]->a = 255;
ptlist[1]->r = (ubyte)r;
ptlist[1]->g = (ubyte)g;
ptlist[1]->b = (ubyte)b;
ptlist[1]->a = 255;
ptlist[2]->r = (ubyte)r;
ptlist[2]->g = (ubyte)g;
ptlist[2]->b = (ubyte)b;
ptlist[2]->a = 255;
ptlist[3]->r = (ubyte)r;
ptlist[3]->g = (ubyte)g;
ptlist[3]->b = (ubyte)b;
ptlist[3]->a = 255;
gr_tmapper(4, ptlist, tmap_flags | TMAP_FLAG_RGB | TMAP_FLAG_GOURAUD | TMAP_FLAG_CORRECT);
return center.xyz.z;
}
void physics_apply_shock(vec3d *direction_vec, float pressure, physics_info *pi, matrix *orient, vec3d *min, vec3d *max, float radius)
{
vec3d normal;
vec3d local_torque, temp_torque, torque;
vec3d impact_vec;
vec3d area;
vec3d sin;
if (radius > MAX_RADIUS) {
return;
}
vm_vec_normalize_safe ( direction_vec );
area.xyz.x = (max->xyz.y - min->xyz.z) * (max->xyz.z - min->xyz.z);
area.xyz.y = (max->xyz.x - min->xyz.x) * (max->xyz.z - min->xyz.z);
area.xyz.z = (max->xyz.x - min->xyz.x) * (max->xyz.y - min->xyz.y);
normal.xyz.x = vm_vec_dotprod( direction_vec, &orient->vec.rvec );
normal.xyz.y = vm_vec_dotprod( direction_vec, &orient->vec.uvec );
normal.xyz.z = vm_vec_dotprod( direction_vec, &orient->vec.fvec );
sin.xyz.x = fl_sqrt( fl_abs(1.0f - normal.xyz.x*normal.xyz.x) );
sin.xyz.y = fl_sqrt( fl_abs(1.0f - normal.xyz.y*normal.xyz.y) );
sin.xyz.z = fl_sqrt( fl_abs(1.0f - normal.xyz.z*normal.xyz.z) );
vm_vec_make( &torque, 0.0f, 0.0f, 0.0f );
// find the torque exerted due to the shockwave hitting each face
// model the effect of the shockwave as if the shockwave were a plane of projectiles,
// all moving in the direction direction_vec. then find the torque as the cross prod
// of the force (pressure * area * normal * sin * scale * mass)
// normal takes account the fraction of the surface exposed to the shockwave
// the sin term is not technically needed but "feels" better
// scale factors out the increase in area with larger objects
// more massive objects get less rotation
// find torque due to forces on the right/left face
if ( normal.xyz.x < 0.0f ) // normal < 0, hits the right face
vm_vec_copy_scale( &impact_vec, &orient->vec.rvec, max->xyz.x * pressure * area.xyz.x * normal.xyz.x * sin.xyz.x / pi->mass );
else // normal > 0, hits the left face
vm_vec_copy_scale( &impact_vec, &orient->vec.rvec, min->xyz.x * pressure * area.xyz.x * -normal.xyz.x * sin.xyz.x / pi->mass );
vm_vec_crossprod( &temp_torque, &impact_vec, direction_vec );
vm_vec_add2( &torque, &temp_torque );
// find torque due to forces on the up/down face
if ( normal.xyz.y < 0.0f )
vm_vec_copy_scale( &impact_vec, &orient->vec.uvec, max->xyz.y * pressure * area.xyz.y * normal.xyz.y * sin.xyz.y / pi->mass );
else
vm_vec_copy_scale( &impact_vec, &orient->vec.uvec, min->xyz.y * pressure * area.xyz.y * -normal.xyz.y * sin.xyz.y / pi->mass );
vm_vec_crossprod( &temp_torque, &impact_vec, direction_vec );
vm_vec_add2( &torque, &temp_torque );
// find torque due to forces on the forward/backward face
if ( normal.xyz.z < 0.0f )
vm_vec_copy_scale( &impact_vec, &orient->vec.fvec, max->xyz.z * pressure * area.xyz.z * normal.xyz.z * sin.xyz.z / pi->mass );
else
vm_vec_copy_scale( &impact_vec, &orient->vec.fvec, min->xyz.z * pressure * area.xyz.z * -normal.xyz.z * sin.xyz.z / pi->mass );
vm_vec_crossprod( &temp_torque, &impact_vec, direction_vec );
vm_vec_add2( &torque, &temp_torque );
// compute delta rotvel, scale according to blast and radius
float scale;
if (radius < MIN_RADIUS) {
scale = 1.0f;
} else {
scale = (MAX_RADIUS - radius)/(MAX_RADIUS-MIN_RADIUS);
}
// set shockwave shake amplitude, duration, flag
pi->shockwave_shake_amp = (float)(MAX_SHAKE*(pressure/STD_PRESSURE)*scale);
pi->shockwave_decay = timestamp( SW_BLAST_DURATION );
pi->flags |= PF_IN_SHOCKWAVE;
// safety dance
if (!(IS_VEC_NULL_SQ_SAFE(&torque))) {
vec3d delta_rotvel;
vm_vec_rotate( &local_torque, &torque, orient );
vm_vec_copy_normalize(&delta_rotvel, &local_torque);
vm_vec_scale(&delta_rotvel, (float)(MAX_ROTVEL*(pressure/STD_PRESSURE)*scale));
// nprintf(("Physics", "rotvel scale %f\n", (MAX_ROTVEL*(pressure/STD_PRESSURE)*scale)));
vm_vec_add2(&pi->rotvel, &delta_rotvel);
}
// set reduced translational damping, set flags
float velocity_scale = (float)MAX_VEL*scale;
pi->flags |= PF_REDUCED_DAMP;
update_reduced_damp_timestamp( pi, velocity_scale*pi->mass );
vm_vec_scale_add2( &pi->vel, direction_vec, velocity_scale );
vm_vec_rotate(&pi->prev_ramp_vel, &pi->vel, orient); // set so velocity will ramp starting from current speed
// check that kick from shockwave is not too large
if (!(pi->flags & PF_USE_VEL) && (vm_vec_mag_squared(&pi->vel) > MAX_SHIP_SPEED*MAX_SHIP_SPEED)) {
// Get DaveA
nprintf(("Physics", "speed reset in physics_apply_shock [speed: %f]\n", vm_vec_mag(&pi->vel)));
vm_vec_normalize(&pi->vel);
vm_vec_scale(&pi->vel, (float)RESET_SHIP_SPEED);
}
}
void batching_add_beam_internal(primitive_batch *batch, vec3d *start, vec3d *end, float width, color *clr, float offset)
{
Assert(batch->get_render_info().prim_type == PRIM_TYPE_TRIS);
vec3d p[4];
batch_vertex verts[6];
vec3d fvec, uvecs, uvece, evec;
vm_vec_sub(&fvec, start, end);
vm_vec_normalize_safe(&fvec);
vm_vec_sub(&evec, &View_position, start);
vm_vec_normalize_safe(&evec);
vm_vec_cross(&uvecs, &fvec, &evec);
vm_vec_normalize_safe(&uvecs);
vm_vec_sub(&evec, &View_position, end);
vm_vec_normalize_safe(&evec);
vm_vec_cross(&uvece, &fvec, &evec);
vm_vec_normalize_safe(&uvece);
vm_vec_scale_add(&p[0], start, &uvecs, width);
vm_vec_scale_add(&p[1], end, &uvece, width);
vm_vec_scale_add(&p[2], end, &uvece, -width);
vm_vec_scale_add(&p[3], start, &uvecs, -width);
//move all the data from the vecs into the verts
//tri 1
verts[0].position = p[3];
verts[1].position = p[2];
verts[2].position = p[1];
//tri 2
verts[3].position = p[3];
verts[4].position = p[1];
verts[5].position = p[0];
//set up the UV coords
//tri 1
verts[0].tex_coord.u = 0.0f;
verts[0].tex_coord.v = 0.0f;
verts[1].tex_coord.u = 1.0f;
verts[1].tex_coord.v = 0.0f;
verts[2].tex_coord.u = 1.0f;
verts[2].tex_coord.v = 1.0f;
//tri 2
verts[3].tex_coord.u = 0.0f;
verts[3].tex_coord.v = 0.0f;
verts[4].tex_coord.u = 1.0f;
verts[4].tex_coord.v = 1.0f;
verts[5].tex_coord.u = 0.0f;
verts[5].tex_coord.v = 1.0f;
for(int i = 0; i < 6; i++) {
verts[i].r = clr->red;
verts[i].g = clr->green;
verts[i].b = clr->blue;
verts[i].a = clr->alpha;
if(offset > 0.0f) {
verts[i].radius = offset;
} else {
verts[i].radius = width;
}
}
batch->add_triangle(&verts[0], &verts[1], &verts[2]);
batch->add_triangle(&verts[3], &verts[4], &verts[5]);
}
void batching_add_laser_internal(primitive_batch *batch, vec3d *p0, float width1, vec3d *p1, float width2, int r, int g, int b)
{
Assert(batch->get_render_info().prim_type == PRIM_TYPE_TRIS);
width1 *= 0.5f;
width2 *= 0.5f;
vec3d uvec, fvec, rvec, center, reye;
vm_vec_sub( &fvec, p0, p1 );
vm_vec_normalize_safe( &fvec );
vm_vec_avg( ¢er, p0, p1 ); // needed for the return value only
vm_vec_sub(&reye, &Eye_position, ¢er);
vm_vec_normalize(&reye);
// compute the up vector
vm_vec_cross(&uvec, &fvec, &reye);
vm_vec_normalize_safe(&uvec);
// ... the forward vector
vm_vec_cross(&fvec, &uvec, &reye);
vm_vec_normalize_safe(&fvec);
// now recompute right vector, in case it wasn't entirely perpendiclar
vm_vec_cross(&rvec, &uvec, &fvec);
// Now have uvec, which is up vector and rvec which is the normal
// of the face.
vec3d start, end;
vm_vec_scale_add(&start, p0, &fvec, -width1);
vm_vec_scale_add(&end, p1, &fvec, width2);
vec3d vecs[4];
batch_vertex verts[6];
vm_vec_scale_add( &vecs[0], &end, &uvec, width2 );
vm_vec_scale_add( &vecs[1], &start, &uvec, width1 );
vm_vec_scale_add( &vecs[2], &start, &uvec, -width1 );
vm_vec_scale_add( &vecs[3], &end, &uvec, -width2 );
verts[0].position = vecs[0];
verts[1].position = vecs[1];
verts[2].position = vecs[2];
verts[3].position = vecs[0];
verts[4].position = vecs[2];
verts[5].position = vecs[3];
verts[0].tex_coord.u = 1.0f;
verts[0].tex_coord.v = 0.0f;
verts[1].tex_coord.u = 0.0f;
verts[1].tex_coord.v = 0.0f;
verts[2].tex_coord.u = 0.0f;
verts[2].tex_coord.v = 1.0f;
verts[3].tex_coord.u = 1.0f;
verts[3].tex_coord.v = 0.0f;
verts[4].tex_coord.u = 0.0f;
verts[4].tex_coord.v = 1.0f;
verts[5].tex_coord.u = 1.0f;
verts[5].tex_coord.v = 1.0f;
verts[0].r = (ubyte)r;
verts[0].g = (ubyte)g;
verts[0].b = (ubyte)b;
verts[0].a = 255;
verts[1].r = (ubyte)r;
verts[1].g = (ubyte)g;
verts[1].b = (ubyte)b;
verts[1].a = 255;
verts[2].r = (ubyte)r;
verts[2].g = (ubyte)g;
verts[2].b = (ubyte)b;
verts[2].a = 255;
verts[3].r = (ubyte)r;
verts[3].g = (ubyte)g;
verts[3].b = (ubyte)b;
verts[3].a = 255;
verts[4].r = (ubyte)r;
verts[4].g = (ubyte)g;
verts[4].b = (ubyte)b;
verts[4].a = 255;
verts[5].r = (ubyte)r;
verts[5].g = (ubyte)g;
verts[5].b = (ubyte)b;
verts[5].a = 255;
batch->add_triangle(&verts[0], &verts[1], &verts[2]);
batch->add_triangle(&verts[3], &verts[4], &verts[5]);
}
void batching_add_bitmap_rotated_internal(primitive_batch *batch, vertex *pnt, float angle, float rad, color *clr, float depth)
{
Assert(batch->get_render_info().prim_type == PRIM_TYPE_TRIS);
float radius = rad;
rad *= 1.41421356f;//1/0.707, becase these are the points of a square or width and height rad
extern float Physics_viewer_bank;
angle -= Physics_viewer_bank;
if ( angle < 0.0f )
angle += PI2;
else if ( angle > PI2 )
angle -= PI2;
vec3d PNT(pnt->world);
vec3d p[4];
vec3d fvec, rvec, uvec;
batch_vertex verts[6];
vm_vec_sub(&fvec, &View_position, &PNT);
vm_vec_normalize_safe(&fvec);
vm_rot_point_around_line(&uvec, &View_matrix.vec.uvec, angle, &vmd_zero_vector, &View_matrix.vec.fvec);
vm_vec_cross(&rvec, &View_matrix.vec.fvec, &uvec);
vm_vec_normalize_safe(&rvec);
vm_vec_cross(&uvec, &View_matrix.vec.fvec, &rvec);
vm_vec_scale_add(&PNT, &PNT, &fvec, depth);
vm_vec_scale_add(&p[0], &PNT, &rvec, rad);
vm_vec_scale_add(&p[2], &PNT, &rvec, -rad);
vm_vec_scale_add(&p[1], &p[2], &uvec, rad);
vm_vec_scale_add(&p[3], &p[0], &uvec, -rad);
vm_vec_scale_add(&p[0], &p[0], &uvec, rad);
vm_vec_scale_add(&p[2], &p[2], &uvec, -rad);
//move all the data from the vecs into the verts
//tri 1
verts[5].position = p[3];
verts[4].position = p[2];
verts[3].position = p[1];
//tri 2
verts[2].position = p[3];
verts[1].position = p[1];
verts[0].position = p[0];
//tri 1
verts[5].tex_coord.u = 0.0f;
verts[5].tex_coord.v = 0.0f;
verts[4].tex_coord.u = 1.0f;
verts[4].tex_coord.v = 0.0f;
verts[3].tex_coord.u = 1.0f;
verts[3].tex_coord.v = 1.0f;
//tri 2
verts[2].tex_coord.u = 0.0f;
verts[2].tex_coord.v = 0.0f;
verts[1].tex_coord.u = 1.0f;
verts[1].tex_coord.v = 1.0f;
verts[0].tex_coord.u = 0.0f;
verts[0].tex_coord.v = 1.0f;
for (int i = 0; i < 6 ; i++) {
verts[i].r = clr->red;
verts[i].g = clr->green;
verts[i].b = clr->blue;
verts[i].a = clr->alpha;
verts[i].radius = radius;
}
batch->add_triangle(&verts[0], &verts[1], &verts[2]);
batch->add_triangle(&verts[3], &verts[4], &verts[5]);
}
void trail_render( trail * trailp )
{
int sections[NUM_TRAIL_SECTIONS];
int num_sections = 0;
int i;
vec3d topv, botv, *fvec, last_pos, tmp_fvec;
vertex top, bot;
int nv = 0;
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) );
// it's a tristrip, so allocate for 2+1
allocate_trail_verts((num_sections * 2) + 1);
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.a = bot.a = l;
if (i > 0) {
float U = i2fl(i);
if (i == num_sections-1) {
// Last one...
vm_vec_avg( ¢erv, &topv, &botv );
if ( !Cmdline_nohtl )
g3_transfer_vertex( &Trail_v_list[nv+2], ¢erv );
else
g3_rotate_vertex( &Trail_v_list[nv+2], ¢erv );
Trail_v_list[nv].a = l;
Trail_v_list[nv].texture_position.u = U;
Trail_v_list[nv].texture_position.v = 1.0f;
Trail_v_list[nv].r = Trail_v_list[nv].g = Trail_v_list[nv].b = l;
nv++;
Trail_v_list[nv].texture_position.u = U;
Trail_v_list[nv].texture_position.v = 0.0f;
Trail_v_list[nv].r = Trail_v_list[nv].g = Trail_v_list[nv].b = l;
nv++;
Trail_v_list[nv].texture_position.u = U + 1.0f;
Trail_v_list[nv].texture_position.v = 0.5f;
Trail_v_list[nv].r = Trail_v_list[nv].g = Trail_v_list[nv].b = 0;
nv++;
} else {
Trail_v_list[nv].texture_position.u = U;
Trail_v_list[nv].texture_position.v = 1.0f;
Trail_v_list[nv].r = Trail_v_list[nv].g = Trail_v_list[nv].b = l;
nv++;
Trail_v_list[nv].texture_position.u = U;
Trail_v_list[nv].texture_position.v = 0.0f;
Trail_v_list[nv].r = Trail_v_list[nv].g = Trail_v_list[nv].b = l;
nv++;
}
}
last_pos = trailp->pos[n];
Trail_v_list[nv] = top;
Trail_v_list[nv+1] = bot;
}
if ( !nv )
return;
if (nv < 3)
Error( LOCATION, "too few verts in trail render\n" );
// there should always be three verts in the last section and 2 everyware else, therefore there should always be an odd number of verts
if ( (nv % 2) != 1 )
Warning( LOCATION, "even number of verts in trail render\n" );
profile_begin("Trail Draw");
gr_set_bitmap( ti->texture.bitmap_id, GR_ALPHABLEND_FILTER, GR_BITBLT_MODE_NORMAL, 1.0f );
gr_render(nv, Trail_v_list, TMAP_FLAG_TEXTURED | TMAP_FLAG_ALPHA | TMAP_FLAG_GOURAUD | TMAP_FLAG_RGB | TMAP_HTL_3D_UNLIT | TMAP_FLAG_TRISTRIP);
profile_end("Trail Draw");
}
void batching_add_bitmap_internal(primitive_batch *batch, vertex *pnt, int orient, float rad, color *clr, float depth)
{
Assert(batch->get_render_info().prim_type == PRIM_TYPE_TRIS);
float radius = rad;
rad *= 1.41421356f;//1/0.707, becase these are the points of a square or width and height rad
vec3d PNT(pnt->world);
vec3d p[4];
vec3d fvec, rvec, uvec;
batch_vertex verts[6];
// get the direction from the point to the eye
vm_vec_sub(&fvec, &View_position, &PNT);
vm_vec_normalize_safe(&fvec);
// get an up vector in the general direction of what we want
uvec = View_matrix.vec.uvec;
// make a right vector from the f and up vector, this r vec is exactly what we want, so...
vm_vec_cross(&rvec, &View_matrix.vec.fvec, &uvec);
vm_vec_normalize_safe(&rvec);
// fix the u vec with it
vm_vec_cross(&uvec, &View_matrix.vec.fvec, &rvec);
// move the center of the sprite based on the depth parameter
if ( depth != 0.0f )
vm_vec_scale_add(&PNT, &PNT, &fvec, depth);
// move one of the verts to the left
vm_vec_scale_add(&p[0], &PNT, &rvec, rad);
// and one to the right
vm_vec_scale_add(&p[2], &PNT, &rvec, -rad);
// now move all oof the verts to were they need to be
vm_vec_scale_add(&p[1], &p[2], &uvec, rad);
vm_vec_scale_add(&p[3], &p[0], &uvec, -rad);
vm_vec_scale_add(&p[0], &p[0], &uvec, rad);
vm_vec_scale_add(&p[2], &p[2], &uvec, -rad);
//move all the data from the vecs into the verts
//tri 1
verts[5].position = p[3];
verts[4].position = p[2];
verts[3].position = p[1];
//tri 2
verts[2].position = p[3];
verts[1].position = p[1];
verts[0].position = p[0];
// set up the UV coords
if ( orient & 1 ) {
// tri 1
verts[5].tex_coord.u = 1.0f;
verts[4].tex_coord.u = 0.0f;
verts[3].tex_coord.u = 0.0f;
// tri 2
verts[2].tex_coord.u = 1.0f;
verts[1].tex_coord.u = 0.0f;
verts[0].tex_coord.u = 1.0f;
} else {
// tri 1
verts[5].tex_coord.u = 0.0f;
verts[4].tex_coord.u = 1.0f;
verts[3].tex_coord.u = 1.0f;
// tri 2
verts[2].tex_coord.u = 0.0f;
verts[1].tex_coord.u = 1.0f;
verts[0].tex_coord.u = 0.0f;
}
if ( orient & 2 ) {
// tri 1
verts[5].tex_coord.v = 1.0f;
verts[4].tex_coord.v = 1.0f;
verts[3].tex_coord.v = 0.0f;
// tri 2
verts[2].tex_coord.v = 1.0f;
verts[1].tex_coord.v = 0.0f;
verts[0].tex_coord.v = 0.0f;
} else {
// tri 1
verts[5].tex_coord.v = 0.0f;
verts[4].tex_coord.v = 0.0f;
verts[3].tex_coord.v = 1.0f;
// tri 2
verts[2].tex_coord.v = 0.0f;
verts[1].tex_coord.v = 1.0f;
verts[0].tex_coord.v = 1.0f;
}
for (int i = 0; i < 6 ; i++) {
verts[i].r = clr->red;
verts[i].g = clr->green;
verts[i].b = clr->blue;
verts[i].a = clr->alpha;
verts[i].radius = radius;
}
batch->add_triangle(&verts[5], &verts[4], &verts[3]);
batch->add_triangle(&verts[2], &verts[1], &verts[0]);
}
float g3_draw_laser_htl(vec3d *p0,float width1,vec3d *p1,float width2, int r, int g, int b, uint tmap_flags)
{
width1 *= 0.5f;
width2 *= 0.5f;
vec3d uvec, fvec, rvec, center, reye, rfvec;
vm_vec_sub( &fvec, p0, p1 );
vm_vec_normalize_safe( &fvec );
vm_vec_copy_scale(&rfvec, &fvec, -1.0f);
vm_vec_avg( ¢er, p0, p1 ); //needed for the return value only
vm_vec_sub(&reye, &Eye_position, ¢er);
vm_vec_normalize(&reye);
// code intended to prevent possible null vector normalize issue - start
if (vm_test_parallel(&reye,&fvec)){
fvec.xyz.x = -reye.xyz.z;
fvec.xyz.y = 0.0f;
fvec.xyz.z = -reye.xyz.x;
}
if (vm_test_parallel(&reye,&rfvec)){
fvec.xyz.x = reye.xyz.z;
fvec.xyz.y = 0.0f;
fvec.xyz.z = reye.xyz.x;
}
// code intended to prevent possible null vector normalize issue - end
vm_vec_crossprod(&uvec,&fvec,&reye);
vm_vec_normalize(&uvec);
vm_vec_crossprod(&fvec,&uvec,&reye);
vm_vec_normalize(&fvec);
//now recompute right vector, in case it wasn't entirely perpendiclar
vm_vec_crossprod(&rvec,&uvec,&fvec);
// Now have uvec, which is up vector and rvec which is the normal
// of the face.
int i;
vec3d start, end;
vm_vec_scale_add(&start, p0, &fvec, -width1);
vm_vec_scale_add(&end, p1, &fvec, width2);
vec3d vecs[4];
vertex pts[4];
vertex *ptlist[8] =
{ &pts[3], &pts[2], &pts[1], &pts[0],
&pts[0], &pts[1], &pts[2], &pts[3]};
vm_vec_scale_add( &vecs[0], &start, &uvec, width1 );
vm_vec_scale_add( &vecs[1], &end, &uvec, width2 );
vm_vec_scale_add( &vecs[2], &end, &uvec, -width2 );
vm_vec_scale_add( &vecs[3], &start, &uvec, -width1 );
for (i=0; i<4; i++ ) {
g3_transfer_vertex( &pts[i], &vecs[i] );
}
ptlist[0]->texture_position.u = 0.0f;
ptlist[0]->texture_position.v = 0.0f;
ptlist[1]->texture_position.u = 1.0f;
ptlist[1]->texture_position.v = 0.0f;
ptlist[2]->texture_position.u = 1.0f;
ptlist[2]->texture_position.v = 1.0f;
ptlist[3]->texture_position.u = 0.0f;
ptlist[3]->texture_position.v = 1.0f;
ptlist[0]->r = (ubyte)r;
ptlist[0]->g = (ubyte)g;
ptlist[0]->b = (ubyte)b;
ptlist[0]->a = 255;
ptlist[1]->r = (ubyte)r;
ptlist[1]->g = (ubyte)g;
ptlist[1]->b = (ubyte)b;
ptlist[1]->a = 255;
ptlist[2]->r = (ubyte)r;
ptlist[2]->g = (ubyte)g;
ptlist[2]->b = (ubyte)b;
ptlist[2]->a = 255;
ptlist[3]->r = (ubyte)r;
ptlist[3]->g = (ubyte)g;
ptlist[3]->b = (ubyte)b;
ptlist[3]->a = 255;
gr_tmapper(4, ptlist,tmap_flags | TMAP_FLAG_RGB | TMAP_FLAG_GOURAUD | TMAP_FLAG_CORRECT);
return center.xyz.z;
}
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;
}
}
float geometry_batcher::draw_laser(vec3d *p0, float width1, vec3d *p1, float width2, int r, int g, int b)
{
width1 *= 0.5f;
width2 *= 0.5f;
vec3d uvec, fvec, rvec, center, reye;
vm_vec_sub( &fvec, p0, p1 );
vm_vec_normalize_safe( &fvec );
vm_vec_avg( ¢er, p0, p1 ); // needed for the return value only
vm_vec_sub(&reye, &Eye_position, ¢er);
vm_vec_normalize(&reye);
// compute the up vector
vm_vec_cross(&uvec, &fvec, &reye);
vm_vec_normalize_safe(&uvec);
// ... the forward vector
vm_vec_cross(&fvec, &uvec, &reye);
vm_vec_normalize_safe(&fvec);
// now recompute right vector, in case it wasn't entirely perpendiclar
vm_vec_cross(&rvec, &uvec, &fvec);
// Now have uvec, which is up vector and rvec which is the normal
// of the face.
vec3d start, end;
vm_vec_scale_add(&start, p0, &fvec, -width1);
vm_vec_scale_add(&end, p1, &fvec, width2);
vec3d vecs[4];
vertex *pts = &vert[n_to_render * 3];
vm_vec_scale_add( &vecs[0], &end, &uvec, width2 );
vm_vec_scale_add( &vecs[1], &start, &uvec, width1 );
vm_vec_scale_add( &vecs[2], &start, &uvec, -width1 );
vm_vec_scale_add( &vecs[3], &end, &uvec, -width2 );
g3_transfer_vertex( &pts[0], &vecs[0] );
g3_transfer_vertex( &pts[1], &vecs[1] );
g3_transfer_vertex( &pts[2], &vecs[2] );
g3_transfer_vertex( &pts[3], &vecs[0] );
g3_transfer_vertex( &pts[4], &vecs[2] );
g3_transfer_vertex( &pts[5], &vecs[3] );
pts[0].texture_position.u = 1.0f;
pts[0].texture_position.v = 0.0f;
pts[1].texture_position.u = 0.0f;
pts[1].texture_position.v = 0.0f;
pts[2].texture_position.u = 0.0f;
pts[2].texture_position.v = 1.0f;
pts[3].texture_position.u = 1.0f;
pts[3].texture_position.v = 0.0f;
pts[4].texture_position.u = 0.0f;
pts[4].texture_position.v = 1.0f;
pts[5].texture_position.u = 1.0f;
pts[5].texture_position.v = 1.0f;
pts[0].r = (ubyte)r;
pts[0].g = (ubyte)g;
pts[0].b = (ubyte)b;
pts[0].a = 255;
pts[1].r = (ubyte)r;
pts[1].g = (ubyte)g;
pts[1].b = (ubyte)b;
pts[1].a = 255;
pts[2].r = (ubyte)r;
pts[2].g = (ubyte)g;
pts[2].b = (ubyte)b;
pts[2].a = 255;
pts[3].r = (ubyte)r;
pts[3].g = (ubyte)g;
pts[3].b = (ubyte)b;
pts[3].a = 255;
pts[4].r = (ubyte)r;
pts[4].g = (ubyte)g;
pts[4].b = (ubyte)b;
pts[4].a = 255;
pts[5].r = (ubyte)r;
pts[5].g = (ubyte)g;
pts[5].b = (ubyte)b;
pts[5].a = 255;
n_to_render += 2;
use_radius = false;
return center.xyz.z;
}
void geometry_batcher::draw_beam(vec3d *start, vec3d *end, float width, float intensity, float offset)
{
vec3d p[4];
vertex *P = &vert[n_to_render * 3];
float *R = &radius_list[n_to_render * 3];
vec3d fvec, uvecs, uvece, evec;
vm_vec_sub(&fvec, start, end);
vm_vec_normalize_safe(&fvec);
vm_vec_sub(&evec, &View_position, start);
vm_vec_normalize_safe(&evec);
vm_vec_cross(&uvecs, &fvec, &evec);
vm_vec_normalize_safe(&uvecs);
vm_vec_sub(&evec, &View_position, end);
vm_vec_normalize_safe(&evec);
vm_vec_cross(&uvece, &fvec, &evec);
vm_vec_normalize_safe(&uvece);
vm_vec_scale_add(&p[0], start, &uvecs, width);
vm_vec_scale_add(&p[1], end, &uvece, width);
vm_vec_scale_add(&p[2], end, &uvece, -width);
vm_vec_scale_add(&p[3], start, &uvecs, -width);
//move all the data from the vecs into the verts
//tri 1
g3_transfer_vertex(&P[0], &p[3]);
g3_transfer_vertex(&P[1], &p[2]);
g3_transfer_vertex(&P[2], &p[1]);
//tri 2
g3_transfer_vertex(&P[3], &p[3]);
g3_transfer_vertex(&P[4], &p[1]);
g3_transfer_vertex(&P[5], &p[0]);
//set up the UV coords
//tri 1
P[0].texture_position.u = 0.0f; P[0].texture_position.v = 0.0f;
P[1].texture_position.u = 1.0f; P[1].texture_position.v = 0.0f;
P[2].texture_position.u = 1.0f; P[2].texture_position.v = 1.0f;
//tri 2
P[3].texture_position.u = 0.0f; P[3].texture_position.v = 0.0f;
P[4].texture_position.u = 1.0f; P[4].texture_position.v = 1.0f;
P[5].texture_position.u = 0.0f; P[5].texture_position.v = 1.0f;
ubyte _color = (ubyte)(255.0f * intensity);
for(int i = 0; i < 6; i++){
P[i].r = P[i].g = P[i].b = P[i].a = _color;
if(offset > 0.0f) {
R[i] = offset;
} else {
R[i] = width;
}
}
n_to_render += 2;
use_radius = true;
}
void geometry_batcher::draw_bitmap(vertex *pnt, float rad, float angle, float depth)
{
float radius = rad;
rad *= 1.41421356f;//1/0.707, becase these are the points of a square or width and height rad
extern float Physics_viewer_bank;
angle -= Physics_viewer_bank;
if ( angle < 0.0f )
angle += PI2;
else if ( angle > PI2 )
angle -= PI2;
vec3d PNT(pnt->world);
vec3d p[4];
vec3d fvec, rvec, uvec;
vertex *P = &vert[n_to_render * 3];
float *R = &radius_list[n_to_render * 3];
vm_vec_sub(&fvec, &View_position, &PNT);
vm_vec_normalize_safe(&fvec);
vm_rot_point_around_line(&uvec, &View_matrix.vec.uvec, angle, &vmd_zero_vector, &View_matrix.vec.fvec);
vm_vec_cross(&rvec, &View_matrix.vec.fvec, &uvec);
vm_vec_normalize_safe(&rvec);
vm_vec_cross(&uvec, &View_matrix.vec.fvec, &rvec);
vm_vec_scale_add(&PNT, &PNT, &fvec, depth);
vm_vec_scale_add(&p[0], &PNT, &rvec, rad);
vm_vec_scale_add(&p[2], &PNT, &rvec, -rad);
vm_vec_scale_add(&p[1], &p[2], &uvec, rad);
vm_vec_scale_add(&p[3], &p[0], &uvec, -rad);
vm_vec_scale_add(&p[0], &p[0], &uvec, rad);
vm_vec_scale_add(&p[2], &p[2], &uvec, -rad);
//move all the data from the vecs into the verts
//tri 1
g3_transfer_vertex(&P[5], &p[3]);
g3_transfer_vertex(&P[4], &p[2]);
g3_transfer_vertex(&P[3], &p[1]);
//tri 2
g3_transfer_vertex(&P[2], &p[3]);
g3_transfer_vertex(&P[1], &p[1]);
g3_transfer_vertex(&P[0], &p[0]);
//tri 1
P[5].texture_position.u = 0.0f; P[5].texture_position.v = 0.0f;
P[4].texture_position.u = 1.0f; P[4].texture_position.v = 0.0f;
P[3].texture_position.u = 1.0f; P[3].texture_position.v = 1.0f;
//tri 2
P[2].texture_position.u = 0.0f; P[2].texture_position.v = 0.0f;
P[1].texture_position.u = 1.0f; P[1].texture_position.v = 1.0f;
P[0].texture_position.u = 0.0f; P[0].texture_position.v = 1.0f;
for (int i = 0; i < 6 ; i++) {
P[i].r = pnt->r;
P[i].g = pnt->g;
P[i].b = pnt->b;
P[i].a = pnt->a;
R[i] = radius;
}
n_to_render += 2;
}
/*
0----1
|\ |
| \ |
3----2
*/
void geometry_batcher::draw_bitmap(vertex *pnt, int orient, float rad, float depth)
{
float radius = rad;
rad *= 1.41421356f;//1/0.707, becase these are the points of a square or width and height rad
vec3d PNT(pnt->world);
vec3d p[4];
vec3d fvec, rvec, uvec;
vertex *P = &vert[n_to_render * 3];
float *R = &radius_list[n_to_render * 3];
// get the direction from the point to the eye
vm_vec_sub(&fvec, &View_position, &PNT);
vm_vec_normalize_safe(&fvec);
// get an up vector in the general direction of what we want
uvec = View_matrix.vec.uvec;
// make a right vector from the f and up vector, this r vec is exactly what we want, so...
vm_vec_cross(&rvec, &View_matrix.vec.fvec, &uvec);
vm_vec_normalize_safe(&rvec);
// fix the u vec with it
vm_vec_cross(&uvec, &View_matrix.vec.fvec, &rvec);
// move the center of the sprite based on the depth parameter
if ( depth != 0.0f )
vm_vec_scale_add(&PNT, &PNT, &fvec, depth);
// move one of the verts to the left
vm_vec_scale_add(&p[0], &PNT, &rvec, rad);
// and one to the right
vm_vec_scale_add(&p[2], &PNT, &rvec, -rad);
// now move all oof the verts to were they need to be
vm_vec_scale_add(&p[1], &p[2], &uvec, rad);
vm_vec_scale_add(&p[3], &p[0], &uvec, -rad);
vm_vec_scale_add(&p[0], &p[0], &uvec, rad);
vm_vec_scale_add(&p[2], &p[2], &uvec, -rad);
//move all the data from the vecs into the verts
//tri 1
g3_transfer_vertex(&P[5], &p[3]);
g3_transfer_vertex(&P[4], &p[2]);
g3_transfer_vertex(&P[3], &p[1]);
//tri 2
g3_transfer_vertex(&P[2], &p[3]);
g3_transfer_vertex(&P[1], &p[1]);
g3_transfer_vertex(&P[0], &p[0]);
// set up the UV coords
if ( orient & 1 ) {
// tri 1
P[5].texture_position.u = 1.0f;
P[4].texture_position.u = 0.0f;
P[3].texture_position.u = 0.0f;
// tri 2
P[2].texture_position.u = 1.0f;
P[1].texture_position.u = 0.0f;
P[0].texture_position.u = 1.0f;
} else {
// tri 1
P[5].texture_position.u = 0.0f;
P[4].texture_position.u = 1.0f;
P[3].texture_position.u = 1.0f;
// tri 2
P[2].texture_position.u = 0.0f;
P[1].texture_position.u = 1.0f;
P[0].texture_position.u = 0.0f;
}
if ( orient & 2 ) {
// tri 1
P[5].texture_position.v = 1.0f;
P[4].texture_position.v = 1.0f;
P[3].texture_position.v = 0.0f;
// tri 2
P[2].texture_position.v = 1.0f;
P[1].texture_position.v = 0.0f;
P[0].texture_position.v = 0.0f;
} else {
// tri 1
P[5].texture_position.v = 0.0f;
P[4].texture_position.v = 0.0f;
P[3].texture_position.v = 1.0f;
// tri 2
P[2].texture_position.v = 0.0f;
P[1].texture_position.v = 1.0f;
P[0].texture_position.v = 1.0f;
}
for (int i = 0; i < 6 ; i++) {
P[i].r = pnt->r;
P[i].g = pnt->g;
P[i].b = pnt->b;
P[i].a = pnt->a;
R[i] = radius;
}
n_to_render += 2;
}
