void opengl_create_view_matrix(matrix4 *out, const vec3d *pos, const matrix *orient)
{
vec3d scaled_pos;
vec3d inv_pos;
matrix scaled_orient = *orient;
matrix inv_orient;
vm_vec_copy_scale(&scaled_pos, pos, -1.0f);
vm_vec_scale(&scaled_orient.vec.fvec, -1.0f);
vm_copy_transpose(&inv_orient, &scaled_orient);
vm_vec_rotate(&inv_pos, &scaled_pos, &scaled_orient);
vm_matrix4_set_transform(out, &inv_orient, &inv_pos);
}
static matrix4 create_view_matrix(const vec3d *pos, const matrix *orient)
{
vec3d scaled_pos;
vec3d inv_pos;
matrix scaled_orient = *orient;
matrix inv_orient;
vm_vec_copy_scale(&scaled_pos, pos, -1.0f);
vm_vec_scale(&scaled_orient.vec.fvec, -1.0f);
vm_copy_transpose(&inv_orient, &scaled_orient);
vm_vec_rotate(&inv_pos, &scaled_pos, &scaled_orient);
matrix4 out;
vm_matrix4_set_transform(&out, &inv_orient, &inv_pos);
return out;
}
void model_collide_preprocess_subobj(vec3d *pos, matrix *orient, polymodel *pm, polymodel_instance *pmi, int subobj_num)
{
submodel_instance *smi = &pmi->submodel[subobj_num];
smi->mc_base = *pos;
smi->mc_orient = *orient;
int i = pm->submodel[subobj_num].first_child;
while ( i >= 0 ) {
angles angs = pmi->submodel[i].angs;
bsp_info * csm = &pm->submodel[i];
matrix tm = IDENTITY_MATRIX;
vm_vec_unrotate(pos, &csm->offset, &smi->mc_orient );
vm_vec_add2(pos, &smi->mc_base);
if( vm_matrix_same(&tm, &csm->orientation)) {
// if submodel orientation matrix is identity matrix then don't bother with matrix ops
vm_angles_2_matrix(&tm, &angs);
} else {
matrix rotation_matrix = csm->orientation;
vm_rotate_matrix_by_angles(&rotation_matrix, &angs);
matrix inv_orientation;
vm_copy_transpose(&inv_orientation, &csm->orientation);
vm_matrix_x_matrix(&tm, &rotation_matrix, &inv_orientation);
}
vm_matrix_x_matrix(orient, &smi->mc_orient, &tm);
model_collide_preprocess_subobj(pos, orient, pm, pmi, i);
i = csm->next_sibling;
}
}
/**
* nstance at specified point with specified orientation
*
* if matrix==NULL, don't modify matrix. This will be like doing an offset
* if pos==NULL, no position change
*/
void g3_start_instance_matrix(const vec3d *pos, const matrix *orient, bool set_api)
{
vec3d tempv;
matrix tempm,tempm2;
Assert( G3_count == 1 );
Assert(instance_depth<MAX_INSTANCE_DEPTH);
instance_stack[instance_depth].m = View_matrix;
instance_stack[instance_depth].p = View_position;
instance_stack[instance_depth].lm = Light_matrix;
instance_stack[instance_depth].lb = Light_base;
instance_stack[instance_depth].om = Object_matrix;
instance_stack[instance_depth].op = Object_position;
instance_depth++;
// Make sure orient is valid
if (!orient) {
orient = &vmd_identity_matrix; // Assume no change in orient
}
if ( pos ) {
//step 1: subtract object position from view position
vm_vec_sub2(&View_position,pos);
//step 2: rotate view vector through object matrix
vm_vec_rotate(&tempv,&View_position,orient);
View_position = tempv;
vm_vec_unrotate(&tempv,pos,&Object_matrix);
vm_vec_add2(&Object_position, &tempv);
} else {
// No movement, leave View_position alone
}
//step 3: rotate object matrix through view_matrix (vm = ob * vm)
vm_copy_transpose(&tempm2,orient);
vm_matrix_x_matrix(&tempm,&tempm2,&View_matrix);
View_matrix = tempm;
vm_matrix_x_matrix(&Object_matrix,&instance_stack[instance_depth-1].om,orient);
// Update the lighting matrix
matrix saved_orient = Light_matrix;
vec3d saved_base = Light_base;
if ( pos ) {
vm_vec_unrotate(&Light_base,pos,&saved_orient );
vm_vec_add2(&Light_base, &saved_base );
} else {
// No movement, light_base doesn't change.
}
vm_matrix_x_matrix(&Light_matrix,&saved_orient, orient);
if(!Cmdline_nohtl && set_api)
gr_start_instance_matrix(pos, orient);
}
// This function recursively checks a submodel and its children
// for a collision with a vector.
void mc_check_subobj( int mn )
{
vec3d tempv;
vec3d hitpt; // used in bounding box check
bsp_info * sm;
int i;
Assert( mn >= 0 );
Assert( mn < Mc_pm->n_models );
if ( (mn < 0) || (mn>=Mc_pm->n_models) ) return;
sm = &Mc_pm->submodel[mn];
if (sm->no_collisions) return; // don't do collisions
if (sm->nocollide_this_only) goto NoHit; // Don't collide for this model, but keep checking others
// Rotate the world check points into the current subobject's
// frame of reference.
// After this block, Mc_p0, Mc_p1, Mc_direction, and Mc_mag are correct
// and relative to this subobjects' frame of reference.
vm_vec_sub(&tempv, Mc->p0, &Mc_base);
vm_vec_rotate(&Mc_p0, &tempv, &Mc_orient);
vm_vec_sub(&tempv, Mc->p1, &Mc_base);
vm_vec_rotate(&Mc_p1, &tempv, &Mc_orient);
vm_vec_sub(&Mc_direction, &Mc_p1, &Mc_p0);
// bail early if no ray exists
if ( IS_VEC_NULL(&Mc_direction) ) {
return;
}
if (Mc_pm->detail[0] == mn) {
// Quickly bail if we aren't inside the full model bbox
if (!mc_ray_boundingbox( &Mc_pm->mins, &Mc_pm->maxs, &Mc_p0, &Mc_direction, NULL)) {
return;
}
// If we are checking the root submodel, then we might want to check
// the shield at this point
if ((Mc->flags & MC_CHECK_SHIELD) && (Mc_pm->shield.ntris > 0 )) {
mc_check_shield();
return;
}
}
if (!(Mc->flags & MC_CHECK_MODEL)) {
return;
}
Mc_submodel = mn;
// Check if the ray intersects this subobject's bounding box
if ( mc_ray_boundingbox(&sm->min, &sm->max, &Mc_p0, &Mc_direction, &hitpt) ) {
if (Mc->flags & MC_ONLY_BOUND_BOX) {
float dist = vm_vec_dist( &Mc_p0, &hitpt );
// If the ray is behind the plane there is no collision
if (dist < 0.0f) {
goto NoHit;
}
// The ray isn't long enough to intersect the plane
if ( !(Mc->flags & MC_CHECK_RAY) && (dist > Mc_mag) ) {
goto NoHit;
}
// If the ray hits, but a closer intersection has already been found, return
if ( Mc->num_hits && (dist >= Mc->hit_dist) ) {
goto NoHit;
}
Mc->hit_dist = dist;
Mc->hit_point = hitpt;
Mc->hit_submodel = Mc_submodel;
Mc->hit_bitmap = -1;
Mc->num_hits++;
} else {
// The ray intersects this bounding box, so we have to check all the
// polygons in this submodel.
if ( Cmdline_old_collision_sys ) {
model_collide_sub(sm->bsp_data);
} else {
if (Mc->lod > 0 && sm->num_details > 0) {
bsp_info *lod_sm = sm;
for (i = Mc->lod - 1; i >= 0; i--) {
if (sm->details[i] != -1) {
lod_sm = &Mc_pm->submodel[sm->details[i]];
//mprintf(("Checking %s collision for %s using %s instead\n", Mc_pm->filename, sm->name, lod_sm->name));
break;
}
}
model_collide_bsp(model_get_bsp_collision_tree(lod_sm->collision_tree_index), 0);
} else {
model_collide_bsp(model_get_bsp_collision_tree(sm->collision_tree_index), 0);
}
}
}
}
NoHit:
// If we're only checking one submodel, return
if (Mc->flags & MC_SUBMODEL) {
return;
}
// If this subobject doesn't have any children, we're done checking it.
if ( sm->num_children < 1 ) return;
// Save instance (Mc_orient, Mc_base, Mc_point_base)
matrix saved_orient = Mc_orient;
vec3d saved_base = Mc_base;
// Check all of this subobject's children
i = sm->first_child;
while ( i >= 0 ) {
angles angs;
bool blown_off;
bool collision_checked;
bsp_info * csm = &Mc_pm->submodel[i];
if ( Mc_pmi ) {
angs = Mc_pmi->submodel[i].angs;
blown_off = Mc_pmi->submodel[i].blown_off;
collision_checked = Mc_pmi->submodel[i].collision_checked;
} else {
angs = csm->angs;
blown_off = csm->blown_off ? true : false;
collision_checked = false;
}
// Don't check it or its children if it is destroyed
// or if it's set to no collision
if ( !blown_off && !collision_checked && !csm->no_collisions ) {
if ( Mc_pmi ) {
Mc_orient = Mc_pmi->submodel[i].mc_orient;
Mc_base = Mc_pmi->submodel[i].mc_base;
vm_vec_add2(&Mc_base, Mc->pos);
} else {
//instance for this subobject
matrix tm = IDENTITY_MATRIX;
vm_vec_unrotate(&Mc_base, &csm->offset, &saved_orient );
vm_vec_add2(&Mc_base, &saved_base );
if( vm_matrix_same(&tm, &csm->orientation)) {
// if submodel orientation matrix is identity matrix then don't bother with matrix ops
vm_angles_2_matrix(&tm, &angs);
} else {
matrix rotation_matrix = csm->orientation;
vm_rotate_matrix_by_angles(&rotation_matrix, &angs);
matrix inv_orientation;
vm_copy_transpose(&inv_orientation, &csm->orientation);
vm_matrix_x_matrix(&tm, &rotation_matrix, &inv_orientation);
}
vm_matrix_x_matrix(&Mc_orient, &saved_orient, &tm);
}
mc_check_subobj( i );
}
i = csm->next_sibling;
}
}
void HudGaugeReticle::getFirepointStatus() {
//First, get the player ship
ship_info* sip;
ship* shipp;
polymodel* pm;
Assert(Objects[Player->objnum].type == OBJ_SHIP);
if (Objects[Player->objnum].type == OBJ_SHIP) {
shipp = &Ships[Objects[Player->objnum].instance];
sip = &Ship_info[shipp->ship_info_index];
//Get the player eyepoint
pm = model_get(sip->model_num);
if (pm->n_view_positions == 0) {
mprintf(("Model %s does not have a defined eyepoint. Firepoint display could not be generated\n", pm->filename));
} else {
if (pm->n_guns > 0) {
eye eyepoint = pm->view_positions[shipp->current_viewpoint];
vec2d ep = { eyepoint.pnt.xyz.x, eyepoint.pnt.xyz.y };
for (int i = 0; i < pm->n_guns; i++) {
int bankactive = 0;
ship_weapon *swp = &shipp->weapons;
if (!timestamp_elapsed(shipp->weapons.next_primary_fire_stamp[i]))
bankactive = 1;
else if (timestamp_elapsed(shipp->weapons.primary_animation_done_time[i]))
bankactive = 1;
else if (i == shipp->weapons.current_primary_bank || shipp->flags[Ship::Ship_Flags::Primary_linked])
bankactive = 2;
int num_slots = pm->gun_banks[i].num_slots;
for (int j = 0; j < num_slots; j++) {
int fpactive = bankactive;
if (sip->flags[Ship::Info_Flags::Dyn_primary_linking]) {
// If this firepoint is not among the next shot(s) to be fired, dim it one step
if ( !( (j >= (shipp->last_fired_point[i]+1) % num_slots) && (j <= (shipp->last_fired_point[i]+swp->primary_bank_slot_count[i]) % num_slots) ) ) {
fpactive--;
}
} else if (Weapon_info[swp->primary_bank_weapons[i]].wi_flags[Weapon::Info_Flags::Cycle]) {
// If this firepoint is not the next one to be fired, dim it one step
if (j != (shipp->last_fired_point[i]+1) % num_slots) {
fpactive--;
}
}
vec3d fpfromeye;
matrix eye_orient, player_transpose;
vm_copy_transpose(&player_transpose, &Objects[Player->objnum].orient);
vm_matrix_x_matrix(&eye_orient, &player_transpose, &Eye_matrix);
vm_vec_rotate(&fpfromeye, &pm->gun_banks[i].pnt[j], &eye_orient);
firepoint tmp = { { fpfromeye.xyz.x - ep.x, ep.y - fpfromeye.xyz.y }, fpactive };
fp.push_back(tmp);
}
}
}
}
}
}
