// determine if the subsystem to lock on to has a direct line of sight
int hud_lock_on_subsys_ok()
{
ship_subsys *subsys;
vec3d subobj_pos;
object *target_objp;
int in_sight=0;
Assert(Player_ai->target_objnum >= 0);
target_objp = &Objects[Player_ai->target_objnum];
subsys = Player_ai->targeted_subsys;
if ( !subsys ) {
return 0;
}
vm_vec_unrotate(&subobj_pos, &subsys->system_info->pnt, &target_objp->orient);
vm_vec_add2(&subobj_pos, &target_objp->pos);
if ( Player->subsys_in_view < 0 ) {
in_sight = ship_subsystem_in_sight(target_objp, subsys, &View_position, &subobj_pos);
} else {
in_sight = Player->subsys_in_view;
}
return in_sight;
}
/**
* 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);
}
}
// Textured Poly
// +0 int id
// +4 int size
// +8 vec3d normal
// +20 vec3d center
// +32 float radius
// +36 int nverts
// +40 int tmap_num
// +44 nverts*(model_tmap_vert) vertlist (n,u,v)
void moff_tmappoly(ubyte* p, polymodel* pm, model_octant* oct, int just_count)
{
int i, nv;
model_tmap_vert* verts;
nv = w(p + 36);
if (nv < 0)
return;
verts = (model_tmap_vert*)(p + 44);
if ((pm->version < 2003) && !just_count)
{
// Set the "normal_point" part of field to be the center of the polygon
vec3d center_point;
vm_vec_zero(¢er_point);
Assert(Interp_verts != NULL);
for (i = 0; i < nv; i++)
{
vm_vec_add2(¢er_point, Interp_verts[verts[i].vertnum]);
}
center_point.xyz.x /= nv;
center_point.xyz.y /= nv;
center_point.xyz.z /= nv;
*vp(p + 20) = center_point;
float rad = 0.0f;
for (i = 0; i < nv; i++)
{
float dist = vm_vec_dist(¢er_point, Interp_verts[verts[i].vertnum]);
if (dist > rad)
{
rad = dist;
}
}
fl(p + 32) = rad;
}
// Put each face into a particular octant
if (point_in_octant(pm, oct, vp(p + 20)))
{
if (just_count)
oct->nverts++;
else
oct->verts[oct->nverts++] = vp(p + 20);
return;
}
}
object *object_create_debris(object *parent, int subobj_num)
{
int objnum;
object *obj;
polymodel *po;
Assert((parent->type == OBJ_ROBOT) || (parent->type == OBJ_PLAYER) );
objnum = obj_create(OBJ_DEBRIS,0,parent->segnum,&parent->pos,
&parent->orient,Polygon_models[parent->rtype.pobj_info.model_num].submodel_rads[subobj_num],
CT_DEBRIS,MT_PHYSICS,RT_POLYOBJ);
if ((objnum < 0 ) && (Highest_object_index >= MAX_OBJECTS-1)) {
mprintf((1, "Can't create object in object_create_debris.\n"));
Int3();
return NULL;
}
if ( objnum < 0 )
return NULL; // Not enough debris slots!
obj = &Objects[objnum];
Assert(subobj_num < 32);
//Set polygon-object-specific data
obj->rtype.pobj_info.model_num = parent->rtype.pobj_info.model_num;
obj->rtype.pobj_info.subobj_flags = 1<<subobj_num;
obj->rtype.pobj_info.tmap_override = parent->rtype.pobj_info.tmap_override;
//Set physics data for this object
po = &Polygon_models[obj->rtype.pobj_info.model_num];
obj->mtype.phys_info.velocity.x = RAND_MAX/2 - rand();
obj->mtype.phys_info.velocity.y = RAND_MAX/2 - rand();
obj->mtype.phys_info.velocity.z = RAND_MAX/2 - rand();
vm_vec_normalize_quick(&obj->mtype.phys_info.velocity);
vm_vec_scale(&obj->mtype.phys_info.velocity,i2f(10 + (30 * rand() / RAND_MAX)));
vm_vec_add2(&obj->mtype.phys_info.velocity,&parent->mtype.phys_info.velocity);
vm_vec_make(&obj->mtype.phys_info.rotvel,10*0x2000/3,10*0x4000/3,10*0x7000/3);
vm_vec_zero(&obj->mtype.phys_info.rotthrust);
obj->lifeleft = DEBRIS_LIFE;
obj->mtype.phys_info.mass = fixmuldiv(parent->mtype.phys_info.mass,obj->size,parent->size);
obj->mtype.phys_info.drag = 0; //fl2f(0.2); //parent->mtype.phys_info.drag;
return obj;
}
float dock_calc_max_semilatus_rectum_parallel_to_axis(object *objp, axis_type axis)
{
Assert(objp != NULL);
vec3d local_line_end;
vec3d *world_line_start, world_line_end;
dock_function_info dfi;
// to calculate the semilatus rectum, we need a directrix that will be parallel to the axis
// the first endpoint is simply the position of the object
world_line_start = &objp->pos;
// the second endpoint extends in the axis direction
vm_vec_zero(&local_line_end);
switch(axis)
{
case X_AXIS:
local_line_end.xyz.x = 1.0f;
break;
case Y_AXIS:
local_line_end.xyz.y = 1.0f;
break;
case Z_AXIS:
local_line_end.xyz.z = 1.0f;
break;
default:
Int3();
return 0.0f;
}
// rotate and move the endpoint to go through the axis of the actual object
vm_vec_rotate(&world_line_end, &local_line_end, &objp->orient);
vm_vec_add2(&world_line_end, &objp->pos);
// now we have a unit vector starting at the object's position and pointing along the chosen axis
// (although the length doesn't matter, as it's calculated as an endless line)
// now determine the semilatus rectum
// set parameters and call function for the semilatus rectum squared
dfi.parameter_variables.vecp_value = world_line_start;
dfi.parameter_variables.vecp_value2 = &world_line_end;
dock_evaluate_all_docked_objects(objp, &dfi, dock_calc_max_semilatus_rectum_squared_parallel_to_directrix_helper);
// the semilatus rectum is the square root of our result
return fl_sqrt(dfi.maintained_variables.float_value);
}
void supernova_get_eye(vec3d *eye_pos, matrix *eye_orient)
{
// supernova camera pos
vec3d Supernova_camera_pos;
static matrix Supernova_camera_orient;
vec3d at;
vec3d sun_temp, sun_vec;
vec3d view;
// set the controls for the heart of the sun
stars_get_sun_pos(0, &sun_temp);
vm_vec_add2(&sun_temp, &Player_obj->pos);
vm_vec_sub(&sun_vec, &sun_temp, &Player_obj->pos);
vm_vec_normalize(&sun_vec);
// always set the camera pos
vec3d move;
matrix whee;
vm_vector_2_matrix(&whee, &move, NULL, NULL);
vm_vec_scale_add(&Supernova_camera_pos, &Player_obj->pos, &whee.vec.rvec, sn_cam_distance);
vm_vec_scale_add2(&Supernova_camera_pos, &whee.vec.uvec, 30.0f);
//cam->set_position(&Supernova_camera_pos);
*eye_pos = Supernova_camera_pos;
// if we're no longer moving the camera
if(Supernova_time < (SUPERNOVA_CUT_TIME - SUPERNOVA_CAMERA_MOVE_TIME)) {
// *eye_pos = Supernova_camera_pos;
//cam->set_rotation(&Supernova_camera_orient);
*eye_orient = Supernova_camera_orient;
}
// otherwise move it
else {
// get a vector somewhere between the supernova shockwave and the player ship
at = Player_obj->pos;
vm_vec_scale_add2(&at, &sun_vec, sn_distance);
vm_vec_sub(&move, &Player_obj->pos, &at);
vm_vec_normalize(&move);
// linearly move towards the player pos
float pct = ((SUPERNOVA_CUT_TIME - Supernova_time) / SUPERNOVA_CAMERA_MOVE_TIME);
vm_vec_scale_add2(&at, &move, sn_distance * pct);
vm_vec_sub(&view, &at, &Supernova_camera_pos);
vm_vec_normalize(&view);
vm_vector_2_matrix(&Supernova_camera_orient, &view, NULL, NULL);
//cam->set_rotation(&Supernova_camera_orient);
*eye_orient = Supernova_camera_orient;
}
//return supernova_camera;
}
// get a point on the hermite curve.
void herm_spline::herm_get_point(vec3d *out, float u, int k)
{
float a = ( (2.0f * u * u * u) - (3.0f * u * u) + 1 );
float b = ( (-2.0f * u * u * u) + (3.0f * u * u) );
float c = ( (u * u * u) - (2.0f * u * u) + u );
float d = ( (u * u * u) - (u * u) );
vec3d va;
vm_vec_copy_scale(&va, &pts[k], a);
vec3d vb;
vm_vec_copy_scale(&vb, &pts[k+1], b);
vec3d vc;
vm_vec_copy_scale(&vc, &d_pts[k], c);
vec3d vd;
vm_vec_copy_scale(&vd, &d_pts[k+1], d);
vm_vec_add(out, &va, &vb);
vm_vec_add2(out, &vc);
vm_vec_add2(out, &vd);
}
// the derivative of a point on the hermite curve
void herm_spline::herm_get_deriv(vec3d *deriv, float u, int k)
{
float a = ( (6.0f * u * u) - (6.0f * u) );
float b = ( (-6.0f * u * u) + (6.0f * u) );
float c = ( (3.0f * u * u) - (4.0f * u) + 1 );
float d = ( (3.0f * u * u) - (2.0f * u) );
vec3d va;
vm_vec_copy_scale(&va, &pts[k], a);
vec3d vb;
vm_vec_copy_scale(&vb, &pts[k+1], b);
vec3d vc;
vm_vec_copy_scale(&vc, &d_pts[k], c);
vec3d vd;
vm_vec_copy_scale(&vd, &d_pts[k+1], d);
vm_vec_add(deriv, &va, &vb);
vm_vec_add2(deriv, &vc);
vm_vec_add2(deriv, &vd);
}
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);
}
}
// -----------------------------------------------------------------------------
//return the position & orientation of a gun on the control center object
void calc_controlcen_gun_point(vms_vector *gun_point,vms_vector *gun_dir,object *obj,int gun_num)
{
vms_matrix m;
Assert(obj->type == OBJ_CNTRLCEN);
Assert(obj->render_type==RT_POLYOBJ);
Assert(gun_num < N_controlcen_guns);
//instance gun position & orientation
vm_copy_transpose_matrix(&m,&obj->orient);
vm_vec_rotate(gun_point,&controlcen_gun_points[gun_num],&m);
vm_vec_add2(gun_point,&obj->pos);
vm_vec_rotate(gun_dir,&controlcen_gun_dirs[gun_num],&m);
}
// What we're doing here is projecting each object extent onto the directrix, calculating the distance between the
// projected point and the origin, and then taking the maximum distance as the semilatus rectum. We're actually
// maintaining the square of the distance rather than the actual distance, as it's faster to calculate and it gives
// the same result in a greater-than or less-than comparison. When we're done calculating everything for all
// objects (i.e. when we return to the parent function) we take the square root of the final value.
void dock_calc_max_semilatus_rectum_squared_parallel_to_directrix_helper(object *objp, dock_function_info *infop)
{
vec3d world_point, local_point[6], nearest;
polymodel *pm;
int i;
float temp, dist_squared;
// line parameters
vec3d *line_start = infop->parameter_variables.vecp_value;
vec3d *line_end = infop->parameter_variables.vecp_value2;
// We must find world coordinates for each of the six endpoints on the three axes of the object. I looked up
// which axis is front/back, left/right, and up/down, as well as which endpoint is which. It doesn't really
// matter, though, as all we need are the distances.
// grab our model
Assert(objp->type == OBJ_SHIP);
pm = model_get(Ship_info[Ships[objp->instance].ship_info_index].model_num);
// set up the points we want to check
memset(local_point, 0, sizeof(vec3d) * 6);
local_point[0].xyz.x = pm->maxs.xyz.x; // right point (max x)
local_point[1].xyz.x = pm->mins.xyz.x; // left point (min x)
local_point[2].xyz.y = pm->maxs.xyz.y; // top point (max y)
local_point[3].xyz.y = pm->mins.xyz.y; // bottom point (min y)
local_point[4].xyz.z = pm->maxs.xyz.z; // front point (max z)
local_point[5].xyz.z = pm->mins.xyz.z; // rear point (min z)
// check points
for (i = 0; i < 6; i++)
{
// calculate position of point
vm_vec_rotate(&world_point, &local_point[i], &objp->orient);
vm_vec_add2(&world_point, &objp->pos);
// find the nearest point along the line
vm_vec_dist_squared_to_line(&world_point, line_start, line_end, &nearest, &temp);
// find the distance squared between the origin of the line and the point on the line
dist_squared = vm_vec_dist_squared(line_start, &nearest);
// update with farthest distance squared
if (dist_squared > infop->maintained_variables.float_value)
infop->maintained_variables.float_value = dist_squared;
}
}
//given an object and a gun number, return position in 3-space of gun
//fills in gun_point
void calc_gun_point(vms_vector *gun_point,object *obj,int gun_num)
{
polymodel *pm;
robot_info *r;
vms_vector pnt;
vms_matrix m;
int mn; //submodel number
Assert(obj->render_type==RT_POLYOBJ || obj->render_type==RT_MORPH);
Assert(obj->id < N_robot_types);
r = &Robot_info[obj->id];
pm =&Polygon_models[r->model_num];
if (gun_num >= r->n_guns)
{
mprintf((1, "Bashing gun num %d to 0.\n", gun_num));
//Int3();
gun_num = 0;
}
// Assert(gun_num < r->n_guns);
pnt = r->gun_points[gun_num];
mn = r->gun_submodels[gun_num];
//instance up the tree for this gun
while (mn != 0) {
vms_vector tpnt;
vm_angles_2_matrix(&m,&obj->rtype.pobj_info.anim_angles[mn]);
vm_transpose_matrix(&m);
vm_vec_rotate(&tpnt,&pnt,&m);
vm_vec_add(&pnt,&tpnt,&pm->submodel_offsets[mn]);
mn = pm->submodel_parents[mn];
}
//now instance for the entire object
vm_copy_transpose_matrix(&m,&obj->orient);
vm_vec_rotate(gun_point,&pnt,&m);
vm_vec_add2(gun_point,&obj->pos);
}
void physics_apply_whack(vec3d *impulse, vec3d *pos, physics_info *pi, matrix *orient, float mass)
{
vec3d local_torque, torque;
// vec3d npos;
// Detect null vector.
if ((fl_abs(impulse->xyz.x) <= WHACK_LIMIT) && (fl_abs(impulse->xyz.y) <= WHACK_LIMIT) && (fl_abs(impulse->xyz.z) <= WHACK_LIMIT))
return;
// first do the rotational velocity
// calculate the torque on the body based on the point on the
// object that was hit and the momentum being applied to the object
vm_vec_crossprod(&torque, pos, impulse);
vm_vec_rotate ( &local_torque, &torque, orient );
vec3d delta_rotvel;
vm_vec_rotate( &delta_rotvel, &local_torque, &pi->I_body_inv );
vm_vec_scale ( &delta_rotvel, (float) ROTVEL_WHACK_CONST );
vm_vec_add2( &pi->rotvel, &delta_rotvel );
//mprintf(("Whack: %7.3f %7.3f %7.3f\n", pi->rotvel.xyz.x, pi->rotvel.xyz.y, pi->rotvel.xyz.z));
// instant whack on the velocity
// reduce damping on all axes
pi->flags |= PF_REDUCED_DAMP;
update_reduced_damp_timestamp( pi, vm_vec_mag(impulse) );
// find time for shake from weapon to end
int dtime = timestamp_until(pi->afterburner_decay);
if (dtime < WEAPON_SHAKE_TIME) {
pi->afterburner_decay = timestamp( WEAPON_SHAKE_TIME );
}
// Goober5000 - pi->mass should probably be just mass, as specified in the header
vm_vec_scale_add2( &pi->vel, impulse, 1.0f / mass );
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_whack [speed: %f]\n", vm_vec_mag(&pi->vel)));
vm_vec_normalize(&pi->vel);
vm_vec_scale(&pi->vel, (float)RESET_SHIP_SPEED);
}
vm_vec_rotate( &pi->prev_ramp_vel, &pi->vel, orient ); // set so velocity will ramp starting from current speed
// ramped velocity is now affected by collision
}
// Return true if objp will collide with some large object.
// Don't check for an object this ship is docked to.
int collide_predict_large_ship(object *objp, float distance)
{
object *objp2;
vec3d cur_pos, goal_pos;
ship_info *sip;
sip = &Ship_info[Ships[objp->instance].ship_info_index];
cur_pos = objp->pos;
vm_vec_scale_add(&goal_pos, &cur_pos, &objp->orient.vec.fvec, distance);
for ( objp2 = GET_FIRST(&obj_used_list); objp2 != END_OF_LIST(&obj_used_list); objp2 = GET_NEXT(objp2) ) {
if ((objp != objp2) && (objp2->type == OBJ_SHIP)) {
if (Ship_info[Ships[objp2->instance].ship_info_index].flags & (SIF_BIG_SHIP | SIF_HUGE_SHIP)) {
if (dock_check_find_docked_object(objp, objp2))
continue;
if (cpls_aux(&goal_pos, objp2, objp))
return 1;
}
} else if (!(sip->flags & (SIF_BIG_SHIP | SIF_HUGE_SHIP)) && (objp2->type == OBJ_ASTEROID)) {
if (vm_vec_dist_quick(&objp2->pos, &objp->pos) < (distance + objp2->radius)*2.5f) {
vec3d pos, delvec;
int count;
float d1;
d1 = 2.5f * distance + objp2->radius;
count = (int) (d1/(objp2->radius + objp->radius)); // Scale up distance, else looks like there would be a collision.
pos = cur_pos;
vm_vec_normalized_dir(&delvec, &goal_pos, &cur_pos);
vm_vec_scale(&delvec, d1/count);
for (; count>0; count--) {
if (vm_vec_dist_quick(&pos, &objp2->pos) < objp->radius + objp2->radius)
return 1;
vm_vec_add2(&pos, &delvec);
}
}
}
}
return 0;
}
void get_turret_cam_pos(camera *cam, vec3d *pos)
{
object_h obj(cam->get_object_host());
if(!obj.IsValid())
return;
ship* shipp = &Ships[cam->get_object_host()->instance];
ship_subsys* ssp = GET_FIRST(&shipp->subsys_list);
while ( ssp != END_OF_LIST( &shipp->subsys_list ) )
{
if(ssp->system_info->subobj_num == cam->get_object_host_submodel())
{
ship_get_global_turret_gun_info(cam->get_object_host(), ssp, pos, &normal_cache, 1, NULL);
vec3d offset = vmd_zero_vector;
offset.xyz.x = 0.0001f;
vm_vec_add2(pos, &offset); // prevent beam turrets from crashing with a nullvec
break;
}
ssp = GET_NEXT( ssp );
}
}
// ---------------------------------------------------------------------------------------------------
void set_view_target_from_segment(segment *sp)
{
vms_vector tv = ZERO_VECTOR;
int v;
if (Funky_chase_mode)
{
//set_chase_matrix(sp);
}
else {
for (v=0; v<MAX_VERTICES_PER_SEGMENT; v++)
vm_vec_add2(&tv,&Vertices[sp->verts[v]]);
vm_vec_scale(&tv,F1_0/MAX_VERTICES_PER_SEGMENT);
Ed_view_target = tv;
}
Update_flags |= UF_VIEWPOINT_MOVED;
}
void orient_editor::OnOK()
{
vec3d delta, pos;
object *ptr;
UpdateData(TRUE);
pos.xyz.x = convert(m_position_x);
pos.xyz.y = convert(m_position_y);
pos.xyz.z = convert(m_position_z);
if ((((CButton *) GetDlgItem(IDC_POINT_TO_OBJECT))->GetCheck() == 1) ||
(((CButton *) GetDlgItem(IDC_POINT_TO_LOCATION))->GetCheck() == 1))
set_modified();
vm_vec_sub(&delta, &pos, &Objects[cur_object_index].pos);
if (delta.xyz.x || delta.xyz.y || delta.xyz.z)
set_modified();
ptr = GET_FIRST(&obj_used_list);
while (ptr != END_OF_LIST(&obj_used_list)) {
if (ptr->flags & OF_MARKED) {
vm_vec_add2(&ptr->pos, &delta);
update_object(ptr);
}
ptr = GET_NEXT(ptr);
}
ptr = GET_FIRST(&obj_used_list);
while (ptr != END_OF_LIST(&obj_used_list)) {
if (ptr->flags & OF_MARKED)
object_moved(ptr);
ptr = GET_NEXT(ptr);
}
theApp.record_window_data(&Object_wnd_data, this);
CDialog::OnOK();
}
void warp_camera::do_frame(float in_frametime)
{
vec3d new_vel, delta_pos;
apply_physics( c_damping, c_desired_vel.xyz.x, c_vel.xyz.x, in_frametime, &new_vel.xyz.x, &delta_pos.xyz.x );
apply_physics( c_damping, c_desired_vel.xyz.y, c_vel.xyz.y, in_frametime, &new_vel.xyz.y, &delta_pos.xyz.y );
apply_physics( c_damping, c_desired_vel.xyz.z, c_vel.xyz.z, in_frametime, &new_vel.xyz.z, &delta_pos.xyz.z );
c_vel = new_vel;
vm_vec_add2( &c_pos, &delta_pos );
float ot = c_time+0.0f;
c_time += in_frametime;
if ( (ot < 0.667f) && ( c_time >= 0.667f ) ) {
vec3d tmp;
tmp.xyz.z = 4.739f; // always go this fast forward.
// pick x and y velocities so they are always on a
// circle with a 25 m radius.
float tmp_angle = frand()*PI2;
tmp.xyz.x = 22.0f * (float)sin(tmp_angle);
tmp.xyz.y = -22.0f * (float)cos(tmp_angle);
this->set_velocity( &tmp, 0 );
}
if ( (ot < 3.0f ) && ( c_time >= 3.0f ) ) {
vec3d tmp = ZERO_VECTOR;
this->set_velocity( &tmp, 0 );
}
}
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;
}
}
void physics_collide_whack( vec3d *impulse, vec3d *world_delta_rotvel, physics_info *pi, matrix *orient, bool is_landing )
{
vec3d body_delta_rotvel;
// Detect null vector.
if ((fl_abs(impulse->xyz.x) <= WHACK_LIMIT) && (fl_abs(impulse->xyz.y) <= WHACK_LIMIT) && (fl_abs(impulse->xyz.z) <= WHACK_LIMIT))
return;
vm_vec_rotate( &body_delta_rotvel, world_delta_rotvel, orient );
// vm_vec_scale( &body_delta_rotvel, (float) ROTVEL_COLLIDE_WHACK_CONST );
vm_vec_add2( &pi->rotvel, &body_delta_rotvel );
update_reduced_damp_timestamp( pi, vm_vec_mag(impulse) );
// find time for shake from weapon to end
if (!is_landing) {
int dtime = timestamp_until(pi->afterburner_decay);
if (dtime < WEAPON_SHAKE_TIME) {
pi->afterburner_decay = timestamp( WEAPON_SHAKE_TIME );
}
}
pi->flags |= PF_REDUCED_DAMP;
vm_vec_scale_add2( &pi->vel, impulse, 1.0f / pi->mass );
// check that collision does not give ship too much speed
// reset if too high
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_collide_whack [speed: %f]\n", vm_vec_mag(&pi->vel)));
vm_vec_normalize(&pi->vel);
vm_vec_scale(&pi->vel, (float)RESET_SHIP_SPEED);
}
vm_vec_rotate( &pi->prev_ramp_vel, &pi->vel, orient ); // set so velocity will ramp starting from current speed
// ramped velocity is now affected by collision
// rotate previous ramp velocity (in model coord) to be same as vel (in world coords)
}
// apply the EMP effect to all relevant ships
void emp_apply(vec3d *pos, float inner_radius, float outer_radius, float emp_intensity, float emp_time, bool use_emp_time_for_capship_turrets)
{
float actual_intensity, actual_time;
vec3d dist;
float dist_mag;
float scale_factor;
object *target;
ship_obj *so;
missile_obj *mo;
ship_subsys *moveup;
weapon_info *wip_target;
// all machines check to see if the blast hit a bomb. if so, shut it down (can't move anymore)
for( mo = GET_FIRST(&Missile_obj_list); mo != END_OF_LIST(&Missile_obj_list); mo = GET_NEXT(mo) ) {
target = &Objects[mo->objnum];
if(target->type != OBJ_WEAPON){
continue;
}
Assert(target->instance >= 0);
if(target->instance < 0){
continue;
}
Assert(Weapons[target->instance].weapon_info_index >= 0);
if(Weapons[target->instance].weapon_info_index < 0){
continue;
}
// if we have a bomb weapon
wip_target = &Weapon_info[Weapons[target->instance].weapon_info_index];
if((wip_target->weapon_hitpoints > 0) && !(wip_target->wi_flags2 & WIF2_NO_EMP_KILL)) {
// get the distance between the detonation and the target object
vm_vec_sub(&dist, &target->pos, pos);
dist_mag = vm_vec_mag(&dist);
// if the bomb was within 1/4 of the outer radius, castrate it
if(dist_mag <= (outer_radius * 0.25f)){
// memset(&target->phys_info, 0, sizeof(physics_info));
Weapons[target->instance].weapon_flags |= WF_DEAD_IN_WATER;
mprintf(("EMP killing weapon\n"));
}
}
}
// if I'm only a client in a multiplayer game, do nothing
if(MULTIPLAYER_CLIENT){
return;
}
// See if there are any friendly ships present, if so return without preventing msg
for ( so = GET_FIRST(&Ship_obj_list); so != END_OF_LIST(&Ship_obj_list); so = GET_NEXT(so) ) {
target = &Objects[so->objnum];
if(target->type != OBJ_SHIP){
continue;
}
Assert(Objects[so->objnum].instance >= 0);
if(Objects[so->objnum].instance < 0){
continue;
}
Assert(Ships[Objects[so->objnum].instance].ship_info_index >= 0);
if(Ships[Objects[so->objnum].instance].ship_info_index < 0){
continue;
}
// if the ship is a cruiser or cap ship, only apply the EMP effect to turrets
if(Ship_info[Ships[target->instance].ship_info_index].flags & (SIF_BIG_SHIP | SIF_HUGE_SHIP)) {
float capship_emp_time = use_emp_time_for_capship_turrets ? emp_time : MAX_TURRET_DISRUPT_TIME;
moveup = &Ships[target->instance].subsys_list;
if(moveup->next != NULL){
moveup = moveup->next;
}
while(moveup != &Ships[target->instance].subsys_list){
// if this is a turret, disrupt it
if((moveup->system_info != NULL) && (moveup->system_info->type == SUBSYSTEM_TURRET)){
vec3d actual_pos;
// get the distance to the subsys
vm_vec_unrotate(&actual_pos, &moveup->system_info->pnt, &target->orient);
vm_vec_add2(&actual_pos, &target->pos);
vm_vec_sub(&dist, &actual_pos, pos);
dist_mag = vm_vec_mag(&dist);
// if for some reason, the object was outside the blast, radius
if(dist_mag > outer_radius){
// next item
moveup = moveup->next;
continue;
}
// compute a scale factor for the emp effect
scale_factor = 1.0f;
if(dist_mag >= inner_radius){
scale_factor = 1.0f - (dist_mag / outer_radius);
}
scale_factor -= Ship_info[Ships[target->instance].ship_info_index].emp_resistance_mod;
if (scale_factor < 0.0f) {
moveup = moveup->next;
continue;
}
// disrupt the turret
ship_subsys_set_disrupted(moveup, (int)(capship_emp_time * scale_factor));
mprintf(("EMP disrupting subsys %s on ship %s (%f, %f)\n", moveup->system_info->subobj_name, Ships[Objects[so->objnum].instance].ship_name, scale_factor, capship_emp_time * scale_factor));
}
// next item
moveup = moveup->next;
}
}
// otherwise coat the whole ship with the effect. mmmmmmmmm.
else {
// get the distance between the detonation and the target object
vm_vec_sub(&dist, &target->pos, pos);
dist_mag = vm_vec_mag(&dist);
// if for some reason, the object was outside the blast, radius
if(dist_mag > outer_radius){
continue;
}
// compute a scale factor for the emp effect
scale_factor = 1.0f;
if(dist_mag >= inner_radius){
scale_factor = 1.0f - (dist_mag / outer_radius);
}
scale_factor -= Ship_info[Ships[target->instance].ship_info_index].emp_resistance_mod;
if (scale_factor < 0.0f) {
continue;
}
// calculate actual EMP effect values
actual_intensity = emp_intensity * scale_factor;
actual_time = emp_time * scale_factor;
mprintf(("EMP effect s : %f, i : %f, t : %f\n", scale_factor, actual_intensity, actual_time));
// if this effect happened to be on me, start it now
if((target == Player_obj) && !(Game_mode & GM_STANDALONE_SERVER)){
emp_start_local(actual_intensity, actual_time);
}
// if this is a multiplayer game, notify other players of the effect
if(Game_mode & GM_MULTIPLAYER){
Assert(MULTIPLAYER_MASTER);
send_emp_effect(target->net_signature, actual_intensity, actual_time);
}
// now be sure to start the emp effect for the ship itself
emp_start_ship(target, actual_intensity, actual_time);
}
}
}
do_endlevel_frame()
{
static fix timer;
vms_vector save_last_pos;
static fix explosion_wait1=0;
static fix explosion_wait2=0;
static fix bank_rate;
static fix ext_expl_halflife;
save_last_pos = ConsoleObject->last_pos; //don't let move code change this
object_move_all();
ConsoleObject->last_pos = save_last_pos;
if (ext_expl_playing) {
external_explosion.lifeleft -= FrameTime;
do_explosion_sequence(&external_explosion);
if (external_explosion.lifeleft < ext_expl_halflife)
mine_destroyed = 1;
if (external_explosion.flags & OF_SHOULD_BE_DEAD)
ext_expl_playing = 0;
}
if (cur_fly_speed != desired_fly_speed) {
fix delta = desired_fly_speed - cur_fly_speed;
fix frame_accel = fixmul(FrameTime,FLY_ACCEL);
if (abs(delta) < frame_accel)
cur_fly_speed = desired_fly_speed;
else
if (delta > 0)
cur_fly_speed += frame_accel;
else
cur_fly_speed -= frame_accel;
}
//do big explosions
if (!outside_mine) {
if (Endlevel_sequence==EL_OUTSIDE) {
vms_vector tvec;
vm_vec_sub(&tvec,&ConsoleObject->pos,&mine_side_exit_point);
if (vm_vec_dot(&tvec,&mine_exit_orient.fvec) > 0) {
object *tobj;
outside_mine = 1;
tobj = object_create_explosion(exit_segnum,&mine_side_exit_point,i2f(50),VCLIP_BIG_PLAYER_EXPLOSION);
if (tobj) {
external_explosion = *tobj;
tobj->flags |= OF_SHOULD_BE_DEAD;
flash_scale = 0; //kill lights in mine
ext_expl_halflife = tobj->lifeleft;
ext_expl_playing = 1;
}
digi_link_sound_to_pos( SOUND_BIG_ENDLEVEL_EXPLOSION, exit_segnum, 0, &mine_side_exit_point, 0, i2f(3)/4 );
}
}
//do explosions chasing player
if ((explosion_wait1-=FrameTime) < 0) {
vms_vector tpnt;
int segnum;
object *expl;
static int sound_count;
vm_vec_scale_add(&tpnt,&ConsoleObject->pos,&ConsoleObject->orient.fvec,-ConsoleObject->size*5);
vm_vec_scale_add2(&tpnt,&ConsoleObject->orient.rvec,(rand()-RAND_MAX/2)*15);
vm_vec_scale_add2(&tpnt,&ConsoleObject->orient.uvec,(rand()-RAND_MAX/2)*15);
segnum = find_point_seg(&tpnt,ConsoleObject->segnum);
if (segnum != -1) {
expl = object_create_explosion(segnum,&tpnt,i2f(20),VCLIP_BIG_PLAYER_EXPLOSION);
if (rand()<10000 || ++sound_count==7) { //pseudo-random
digi_link_sound_to_pos( SOUND_TUNNEL_EXPLOSION, segnum, 0, &tpnt, 0, F1_0 );
sound_count=0;
}
}
explosion_wait1 = 0x2000 + rand()/4;
}
}
//do little explosions on walls
if (Endlevel_sequence >= EL_FLYTHROUGH && Endlevel_sequence < EL_OUTSIDE)
if ((explosion_wait2-=FrameTime) < 0) {
vms_vector tpnt;
fvi_query fq;
fvi_info hit_data;
//create little explosion on wall
vm_vec_copy_scale(&tpnt,&ConsoleObject->orient.rvec,(rand()-RAND_MAX/2)*100);
vm_vec_scale_add2(&tpnt,&ConsoleObject->orient.uvec,(rand()-RAND_MAX/2)*100);
vm_vec_add2(&tpnt,&ConsoleObject->pos);
if (Endlevel_sequence == EL_FLYTHROUGH)
vm_vec_scale_add2(&tpnt,&ConsoleObject->orient.fvec,rand()*200);
else
vm_vec_scale_add2(&tpnt,&ConsoleObject->orient.fvec,rand()*60);
//find hit point on wall
fq.p0 = &ConsoleObject->pos;
fq.p1 = &tpnt;
fq.startseg = ConsoleObject->segnum;
fq.rad = 0;
fq.thisobjnum = 0;
fq.ignore_obj_list = NULL;
fq.flags = 0;
find_vector_intersection(&fq,&hit_data);
if (hit_data.hit_type==HIT_WALL && hit_data.hit_seg!=-1)
object_create_explosion(hit_data.hit_seg,&hit_data.hit_pnt,i2f(3)+rand()*6,VCLIP_SMALL_EXPLOSION);
explosion_wait2 = (0xa00 + rand()/8)/2;
}
switch (Endlevel_sequence) {
case EL_OFF: return;
case EL_FLYTHROUGH: {
do_endlevel_flythrough(0);
if (ConsoleObject->segnum == transition_segnum) {
int objnum;
Endlevel_sequence = EL_LOOKBACK;
objnum = obj_create(OBJ_CAMERA, 0,
ConsoleObject->segnum,&ConsoleObject->pos,&ConsoleObject->orient,0,
CT_NONE,MT_NONE,RT_NONE);
if (objnum == -1) { //can't get object, so abort
mprintf((1, "Can't get object for endlevel sequence. Aborting endlevel sequence.\n"));
stop_endlevel_sequence();
return;
}
Viewer = endlevel_camera = &Objects[objnum];
select_cockpit(CM_LETTERBOX);
fly_objects[1] = fly_objects[0];
fly_objects[1].obj = endlevel_camera;
fly_objects[1].speed = (5*cur_fly_speed)/4;
fly_objects[1].offset_frac = 0x4000;
vm_vec_scale_add2(&endlevel_camera->pos,&endlevel_camera->orient.fvec,i2f(7));
timer=0x20000;
}
break;
}
case EL_LOOKBACK: {
do_endlevel_flythrough(0);
do_endlevel_flythrough(1);
if (timer>0) {
timer -= FrameTime;
if (timer < 0) //reduce speed
fly_objects[1].speed = fly_objects[0].speed;
}
if (endlevel_camera->segnum == exit_segnum) {
vms_angvec cam_angles,exit_seg_angles;
Endlevel_sequence = EL_OUTSIDE;
timer = i2f(2);
vm_vec_negate(&endlevel_camera->orient.fvec);
vm_vec_negate(&endlevel_camera->orient.rvec);
vm_extract_angles_matrix(&cam_angles,&endlevel_camera->orient);
vm_extract_angles_matrix(&exit_seg_angles,&mine_exit_orient);
bank_rate = (-exit_seg_angles.b - cam_angles.b)/2;
ConsoleObject->control_type = endlevel_camera->control_type = CT_NONE;
//_MARK_("Starting outside");//Commented out by KRB
#ifdef SLEW_ON
slew_obj = endlevel_camera;
#endif
}
break;
}
case EL_OUTSIDE: {
#ifndef SLEW_ON
vms_angvec cam_angles;
#endif
vm_vec_scale_add2(&ConsoleObject->pos,&ConsoleObject->orient.fvec,fixmul(FrameTime,cur_fly_speed));
#ifndef SLEW_ON
vm_vec_scale_add2(&endlevel_camera->pos,&endlevel_camera->orient.fvec,fixmul(FrameTime,-2*cur_fly_speed));
vm_vec_scale_add2(&endlevel_camera->pos,&endlevel_camera->orient.uvec,fixmul(FrameTime,-cur_fly_speed/10));
vm_extract_angles_matrix(&cam_angles,&endlevel_camera->orient);
cam_angles.b += fixmul(bank_rate,FrameTime);
vm_angles_2_matrix(&endlevel_camera->orient,&cam_angles);
#endif
timer -= FrameTime;
if (timer < 0) {
Endlevel_sequence = EL_STOPPED;
vm_extract_angles_matrix(&player_angles,&ConsoleObject->orient);
timer = i2f(3);
}
break;
}
case EL_STOPPED: {
get_angs_to_object(&player_dest_angles,&station_pos,&ConsoleObject->pos);
chase_angles(&player_angles,&player_dest_angles);
vm_angles_2_matrix(&ConsoleObject->orient,&player_angles);
vm_vec_scale_add2(&ConsoleObject->pos,&ConsoleObject->orient.fvec,fixmul(FrameTime,cur_fly_speed));
timer -= FrameTime;
if (timer < 0) {
#ifdef SLEW_ON
slew_obj = endlevel_camera;
_do_slew_movement(endlevel_camera,1,1);
timer += FrameTime; //make time stop
break;
#else
#ifdef SHORT_SEQUENCE
stop_endlevel_sequence();
#else
Endlevel_sequence = EL_PANNING;
vm_extract_angles_matrix(&camera_cur_angles,&endlevel_camera->orient);
timer = i2f(3);
if (Game_mode & GM_MULTI) { // try to skip part of the seq if multiplayer
stop_endlevel_sequence();
return;
}
//mprintf((0,"Switching to pan...\n"));
#endif //SHORT_SEQUENCE
#endif //SLEW_ON
}
break;
}
#ifndef SHORT_SEQUENCE
case EL_PANNING: {
#ifndef SLEW_ON
int mask;
#endif
get_angs_to_object(&player_dest_angles,&station_pos,&ConsoleObject->pos);
chase_angles(&player_angles,&player_dest_angles);
vm_angles_2_matrix(&ConsoleObject->orient,&player_angles);
vm_vec_scale_add2(&ConsoleObject->pos,&ConsoleObject->orient.fvec,fixmul(FrameTime,cur_fly_speed));
#ifdef SLEW_ON
_do_slew_movement(endlevel_camera,1,1);
#else
get_angs_to_object(&camera_desired_angles,&ConsoleObject->pos,&endlevel_camera->pos);
mask = chase_angles(&camera_cur_angles,&camera_desired_angles);
vm_angles_2_matrix(&endlevel_camera->orient,&camera_cur_angles);
if ((mask&5) == 5) {
vms_vector tvec;
Endlevel_sequence = EL_CHASING;
//_MARK_("Done outside");//Commented out -KRB
vm_vec_normalized_dir_quick(&tvec,&station_pos,&ConsoleObject->pos);
vm_vector_2_matrix(&ConsoleObject->orient,&tvec,&surface_orient.uvec,NULL);
desired_fly_speed *= 2;
//mprintf((0,"Switching to chase...\n"));
}
#endif
break;
}
case EL_CHASING: {
fix d,speed_scale;
#ifdef SLEW_ON
_do_slew_movement(endlevel_camera,1,1);
#endif
get_angs_to_object(&camera_desired_angles,&ConsoleObject->pos,&endlevel_camera->pos);
chase_angles(&camera_cur_angles,&camera_desired_angles);
#ifndef SLEW_ON
vm_angles_2_matrix(&endlevel_camera->orient,&camera_cur_angles);
#endif
d = vm_vec_dist_quick(&ConsoleObject->pos,&endlevel_camera->pos);
speed_scale = fixdiv(d,i2f(0x20));
if (d<f1_0) d=f1_0;
get_angs_to_object(&player_dest_angles,&station_pos,&ConsoleObject->pos);
chase_angles(&player_angles,&player_dest_angles);
vm_angles_2_matrix(&ConsoleObject->orient,&player_angles);
vm_vec_scale_add2(&ConsoleObject->pos,&ConsoleObject->orient.fvec,fixmul(FrameTime,cur_fly_speed));
#ifndef SLEW_ON
vm_vec_scale_add2(&endlevel_camera->pos,&endlevel_camera->orient.fvec,fixmul(FrameTime,fixmul(speed_scale,cur_fly_speed)));
if (vm_vec_dist(&ConsoleObject->pos,&station_pos) < i2f(10))
stop_endlevel_sequence();
#endif
break;
}
#endif //ifdef SHORT_SEQUENCE
}
}
int _do_slew_movement(object *obj, int check_keys, int check_joy )
{
int moved = 0;
vms_vector svel, movement; //scaled velocity (per this frame)
vms_matrix rotmat,new_pm;
int joy_x,joy_y,btns;
int joyx_moved,joyy_moved;
vms_angvec rotang;
if (keyd_pressed[KEY_PAD5])
vm_vec_zero(&obj->phys_info.velocity);
if (check_keys) {
obj->phys_info.velocity.x += VEL_SPEED * (key_down_time(KEY_PAD9) - key_down_time(KEY_PAD7));
obj->phys_info.velocity.y += VEL_SPEED * (key_down_time(KEY_PADMINUS) - key_down_time(KEY_PADPLUS));
obj->phys_info.velocity.z += VEL_SPEED * (key_down_time(KEY_PAD8) - key_down_time(KEY_PAD2));
rotang.pitch = (key_down_time(KEY_LBRACKET) - key_down_time(KEY_RBRACKET))/ROT_SPEED;
rotang.bank = (key_down_time(KEY_PAD1) - key_down_time(KEY_PAD3))/ROT_SPEED;
rotang.head = (key_down_time(KEY_PAD6) - key_down_time(KEY_PAD4))/ROT_SPEED;
}
else
rotang.pitch = rotang.bank = rotang.head = 0;
//check for joystick movement
if (check_joy && joy_present) {
joy_get_pos(&joy_x,&joy_y);
btns=joy_get_btns();
joyx_moved = (abs(joy_x - old_joy_x)>JOY_NULL);
joyy_moved = (abs(joy_y - old_joy_y)>JOY_NULL);
if (abs(joy_x) < JOY_NULL) joy_x = 0;
if (abs(joy_y) < JOY_NULL) joy_y = 0;
if (btns)
if (!rotang.pitch) rotang.pitch = fixmul(-joy_y * 512,FrameTime); else;
else
if (joyy_moved) obj->phys_info.velocity.z = -joy_y * 8192;
if (!rotang.head) rotang.head = fixmul(joy_x * 512,FrameTime);
if (joyx_moved) old_joy_x = joy_x;
if (joyy_moved) old_joy_y = joy_y;
}
moved = rotang.pitch | rotang.bank | rotang.head;
vm_angles_2_matrix(&rotmat,&rotang);
vm_matrix_x_matrix(&new_pm,&obj->orient,&rotmat);
obj->orient = new_pm;
vm_transpose_matrix(&new_pm); //make those columns rows
moved |= obj->phys_info.velocity.x | obj->phys_info.velocity.y | obj->phys_info.velocity.z;
svel = obj->phys_info.velocity;
vm_vec_scale(&svel,FrameTime); //movement in this frame
vm_vec_rotate(&movement,&svel,&new_pm);
vm_vec_add2(&obj->pos,&movement);
moved |= (movement.x || movement.y || movement.z);
return moved;
}
// ------------------------------------------------------------------
// swarm_update_direction()
//
// Check if we want to update the direction of a swarm missile.
//
void swarm_update_direction(object *objp, float frametime)
{
weapon_info *wip;
weapon *wp;
object *hobjp;
swarm_info *swarmp;
vec3d obj_to_target;
float vel, target_dist, radius, missile_speed, missile_dist;
physics_info *pi;
Assert(objp->instance >= 0 && objp->instance < MAX_WEAPONS);
wp = &Weapons[objp->instance];
if (wp->swarm_index == -1) {
return;
}
wip = &Weapon_info[wp->weapon_info_index];
hobjp = wp->homing_object;
pi = &Objects[wp->objnum].phys_info;
swarmp = &Swarm_missiles[wp->swarm_index];
// check if homing is lost.. if it is then get a new path to move swarm missile along
if ( swarmp->homing_objnum != -1 && hobjp == &obj_used_list ) {
swarmp->change_timestamp = 1;
swarmp->path_num = -1;
swarmp->homing_objnum = -1;
}
if ( hobjp != &obj_used_list ) {
swarmp->homing_objnum = OBJ_INDEX(hobjp);
}
if ( timestamp_elapsed(swarmp->change_timestamp) ) {
if ( swarmp->path_num == -1 ) {
if ( Objects[objp->parent].type != OBJ_SHIP ) {
//AL: parent ship died... so just pick some random paths
swarmp->path_num = myrand()%4;
} else {
ship *parent_shipp;
parent_shipp = &Ships[Objects[objp->parent].instance];
swarmp->path_num = (parent_shipp->next_swarm_path++)%4;
if ( parent_shipp->next_swarm_path%4 == 0 ) {
swarmp->flags ^= SWARM_POSITIVE_PATH;
}
}
vm_vec_scale_add(&swarmp->original_target, &objp->pos, &objp->orient.vec.fvec, SWARM_CONE_LENGTH);
swarmp->circle_rvec = objp->orient.vec.rvec;
swarmp->circle_uvec = objp->orient.vec.uvec;
swarmp->change_count = 1;
swarmp->change_time = fl2i(SWARM_CHANGE_DIR_TIME + SWARM_TIME_VARIANCE*(frand() - 0.5f) * 2);
vm_vec_zero(&swarmp->last_offset);
missile_speed = pi->speed;
missile_dist = missile_speed * swarmp->change_time/1000.0f;
if ( missile_dist < SWARM_DIST_OFFSET ) {
missile_dist=i2fl(SWARM_DIST_OFFSET);
}
swarmp->angle_offset = (float)(asin(SWARM_DIST_OFFSET / missile_dist));
Assert(!_isnan(swarmp->angle_offset) );
}
swarmp->change_timestamp = timestamp(swarmp->change_time);
// check if swarm missile is homing, if so need to calculate a new target pos to turn towards
if ( hobjp != &obj_used_list && f2fl(Missiontime - wp->creation_time) > 0.5f && ( f2fl(Missiontime - wp->creation_time) > wip->free_flight_time ) ) {
swarmp->original_target = wp->homing_pos;
// Calculate a rvec and uvec that will determine the displacement from the
// intended target. Use crossprod to generate a right vector, from the missile
// up vector and the vector connecting missile to the homing object.
swarmp->circle_uvec = objp->orient.vec.uvec;
swarmp->circle_rvec = objp->orient.vec.rvec;
missile_speed = pi->speed;
missile_dist = missile_speed * swarmp->change_time/1000.0f;
if ( missile_dist < SWARM_DIST_OFFSET ) {
missile_dist = i2fl(SWARM_DIST_OFFSET);
}
swarmp->angle_offset = (float)(asin(SWARM_DIST_OFFSET / missile_dist));
Assert(!_isnan(swarmp->angle_offset) );
}
vm_vec_sub(&obj_to_target, &swarmp->original_target, &objp->pos);
target_dist = vm_vec_mag_quick(&obj_to_target);
swarmp->last_dist = target_dist;
// If homing swarm missile is close to target, let missile home in on original target
if ( target_dist < SWARM_DIST_STOP_SWARMING ) {
swarmp->new_target = swarmp->original_target;
goto swarm_new_target_calced;
}
radius = (float)tan(swarmp->angle_offset) * target_dist;
vec3d rvec_component, uvec_component;
swarmp->change_count++;
if ( swarmp->change_count > 2 ) {
swarmp->flags ^= SWARM_POSITIVE_PATH;
swarmp->change_count = 0;
}
// pick a new path number to follow once at center
if ( swarmp->change_count == 1 ) {
swarmp->path_num = swarmp->path_num + myrand()%3;
if ( swarmp->path_num > 3 ) {
swarmp->path_num = 0;
}
}
vm_vec_zero(&rvec_component);
vm_vec_zero(&uvec_component);
switch ( swarmp->path_num ) {
case 0: // straight up and down
if ( swarmp->flags & SWARM_POSITIVE_PATH )
vm_vec_copy_scale( &uvec_component, &swarmp->circle_uvec, radius);
else
vm_vec_copy_scale( &uvec_component, &swarmp->circle_uvec, -radius);
break;
case 1: // left/right
if ( swarmp->flags & SWARM_POSITIVE_PATH )
vm_vec_copy_scale( &rvec_component, &swarmp->circle_rvec, radius);
else
vm_vec_copy_scale( &rvec_component, &swarmp->circle_rvec, -radius);
break;
case 2: // top/right - bottom/left
if ( swarmp->flags & SWARM_POSITIVE_PATH ) {
vm_vec_copy_scale( &rvec_component, &swarmp->circle_rvec, radius);
vm_vec_copy_scale( &uvec_component, &swarmp->circle_uvec, radius);
}
else {
vm_vec_copy_scale( &rvec_component, &swarmp->circle_rvec, -radius);
vm_vec_copy_scale( &uvec_component, &swarmp->circle_uvec, -radius);
}
break;
case 3: // top-left - bottom/right
if ( swarmp->flags & SWARM_POSITIVE_PATH ) {
vm_vec_copy_scale( &rvec_component, &swarmp->circle_rvec, -radius);
vm_vec_copy_scale( &uvec_component, &swarmp->circle_uvec, radius);
}
else {
vm_vec_copy_scale( &rvec_component, &swarmp->circle_rvec, radius);
vm_vec_copy_scale( &uvec_component, &swarmp->circle_uvec, -radius);
}
break;
default:
Int3();
break;
}
swarmp->new_target = swarmp->original_target;
vm_vec_zero(&swarmp->last_offset);
vm_vec_add(&swarmp->last_offset, &uvec_component, &rvec_component);
vm_vec_add2(&swarmp->new_target, &swarmp->last_offset);
}
else {
if ( hobjp != &obj_used_list && f2fl(Missiontime - wp->creation_time) > 0.5f ) {
swarmp->new_target = swarmp->original_target;
if ( swarmp->last_dist < SWARM_DIST_STOP_SWARMING ) {
swarmp->new_target = wp->homing_pos;
goto swarm_new_target_calced;
}
vm_vec_add2(&swarmp->new_target, &swarmp->last_offset);
}
}
swarm_new_target_calced:
ai_turn_towards_vector(&swarmp->new_target, objp, frametime, wip->turn_time, NULL, NULL, 0.0f, 0);
vel = vm_vec_mag(&objp->phys_info.desired_vel);
vm_vec_copy_scale(&objp->phys_info.desired_vel, &objp->orient.vec.fvec, vel);
}
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 draw_world(grs_canvas *screen_canvas,editor_view *v,segment *mine_ptr,int depth)
{
vms_vector viewer_position;
#if DOUBLE_BUFFER
grs_canvas temp_canvas;
// mprintf(0, "\n");
// if ( screen_canvas == LargeViewBox->canvas ) {
// CurrentBigCanvas ^= 1;
//
// gr_set_current_canvas( BigCanvas[CurrentBigCanvas] );
//
// } else {
gr_init_sub_canvas(&temp_canvas,canv_offscreen,0,0,
screen_canvas->cv_bitmap.bm_w,screen_canvas->cv_bitmap.bm_h);
gr_set_current_canvas(&temp_canvas);
// }
#else
gr_set_current_canvas(screen_canvas);
#endif
//mprintf(0, "\n");
ui_mouse_hide();
//g3_set_points(Segment_points,Vertices);
viewer_position = v->ev_matrix.fvec;
vm_vec_scale(&viewer_position,-v->ev_dist);
vm_vec_add2(&viewer_position,&Ed_view_target);
gr_clear_canvas(0);
g3_start_frame();
g3_set_view_matrix(&viewer_position,&v->ev_matrix,v->ev_zoom);
render_start_frame();
gr_setcolor(PLAINSEG_COLOR);
// Draw all segments or only connected segments.
// We might want to draw all segments if we have broken the mine into pieces.
if (Draw_all_segments)
draw_mine_all(Segments, Automap_test);
else
draw_mine(mine_ptr,depth);
// Draw the found segments
if (!Automap_test) {
draw_warning_segments();
draw_group_segments();
draw_found_segments();
draw_selected_segments();
draw_special_segments();
// Highlight group segment and side.
if (current_group > -1)
if (Groupsegp[current_group]) {
gr_setcolor(GROUPSEG_COLOR);
draw_segment(Groupsegp[current_group]);
gr_setcolor(GROUPSIDE_COLOR);
draw_seg_side(Groupsegp[current_group],Groupside[current_group]);
}
// Highlight marked segment and side.
if (Markedsegp) {
gr_setcolor(MARKEDSEG_COLOR);
draw_segment(Markedsegp);
gr_setcolor(MARKEDSIDE_COLOR);
draw_seg_side(Markedsegp,Markedside);
}
// Highlight current segment and current side.
gr_setcolor(CURSEG_COLOR);
draw_segment(Cursegp);
gr_setcolor(CURSIDE_COLOR);
draw_seg_side(Cursegp,Curside);
gr_setcolor(CUREDGE_COLOR);
draw_side_edge(Cursegp,Curside,Curedge);
// Draw coordinate axes if we are rendering the large view.
if (Show_axes_flag)
if (screen_canvas == LargeViewBox->canvas)
draw_coordinate_axes();
// Label the window
gr_set_fontcolor((v==current_view)?CRED:CWHITE, -1 );
if ( screen_canvas == LargeViewBox->canvas ) {
gr_ustring( 5, 5, "USER VIEW" );
switch (Large_view_index) {
case 0: gr_ustring( 85, 5, "-- TOP"); break;
case 1: gr_ustring( 85, 5, "-- FRONT"); break;
case 2: gr_ustring( 85, 5, "-- RIGHT"); break;
}
} else
#if ORTHO_VIEWS
else if ( screen_canvas == TopViewBox->canvas )
gr_ustring( 5, 5, "TOP" );
else if ( screen_canvas == FrontViewBox->canvas )
gr_ustring( 5, 5, "FRONT" );
else if ( screen_canvas == RightViewBox->canvas )
gr_ustring( 5, 5, "RIGHT" );
#else
Error("Ortho views have been removed, what gives?\n");
#endif
}
// -----------------------------------------------------------------------------------------------------------
// add rotational velocity & acceleration
void do_physics_sim_rot(object *obj)
{
vms_angvec tangles;
vms_matrix rotmat,new_orient;
//fix rotdrag_scale;
physics_info *pi;
Assert(FrameTime > 0); //Get MATT if hit this!
pi = &obj->mtype.phys_info;
if (!(pi->rotvel.x || pi->rotvel.y || pi->rotvel.z || pi->rotthrust.x || pi->rotthrust.y || pi->rotthrust.z))
return;
if (obj->mtype.phys_info.drag) {
int count;
vms_vector accel;
fix drag,r,k;
count = FrameTime / FT;
r = FrameTime % FT;
k = fixdiv(r,FT);
drag = (obj->mtype.phys_info.drag*5)/2;
if (obj->mtype.phys_info.flags & PF_USES_THRUST) {
vm_vec_copy_scale(&accel,&obj->mtype.phys_info.rotthrust,fixdiv(f1_0,obj->mtype.phys_info.mass));
while (count--) {
vm_vec_add2(&obj->mtype.phys_info.rotvel,&accel);
vm_vec_scale(&obj->mtype.phys_info.rotvel,f1_0-drag);
}
//do linear scale on remaining bit of time
vm_vec_scale_add2(&obj->mtype.phys_info.rotvel,&accel,k);
vm_vec_scale(&obj->mtype.phys_info.rotvel,f1_0-fixmul(k,drag));
}
else {
fix total_drag=f1_0;
while (count--)
total_drag = fixmul(total_drag,f1_0-drag);
//do linear scale on remaining bit of time
total_drag = fixmul(total_drag,f1_0-fixmul(k,drag));
vm_vec_scale(&obj->mtype.phys_info.rotvel,total_drag);
}
}
//now rotate object
//unrotate object for bank caused by turn
if (obj->mtype.phys_info.turnroll) {
vms_matrix new_pm;
tangles.p = tangles.h = 0;
tangles.b = -obj->mtype.phys_info.turnroll;
vm_angles_2_matrix(&rotmat,&tangles);
vm_matrix_x_matrix(&new_pm,&obj->orient,&rotmat);
obj->orient = new_pm;
}
tangles.p = fixmul(obj->mtype.phys_info.rotvel.x,FrameTime);
tangles.h = fixmul(obj->mtype.phys_info.rotvel.y,FrameTime);
tangles.b = fixmul(obj->mtype.phys_info.rotvel.z,FrameTime);
vm_angles_2_matrix(&rotmat,&tangles);
vm_matrix_x_matrix(&new_orient,&obj->orient,&rotmat);
obj->orient = new_orient;
if (obj->mtype.phys_info.flags & PF_TURNROLL)
set_object_turnroll(obj);
//re-rotate object for bank caused by turn
if (obj->mtype.phys_info.turnroll) {
vms_matrix new_pm;
tangles.p = tangles.h = 0;
tangles.b = obj->mtype.phys_info.turnroll;
vm_angles_2_matrix(&rotmat,&tangles);
vm_matrix_x_matrix(&new_pm,&obj->orient,&rotmat);
obj->orient = new_pm;
}
check_and_fix_matrix(&obj->orient);
}
void dock_calc_docked_center_helper(object *objp, dock_function_info *infop)
{
// add object position and increment count
vm_vec_add2(infop->maintained_variables.vecp_value, &objp->pos);
infop->maintained_variables.int_value++;
}
// -----------------------------------------------------------------------------------------------------------
//Simulate a physics object for this frame
void do_physics_sim(object *obj)
{
int ignore_obj_list[MAX_IGNORE_OBJS],n_ignore_objs;
int iseg;
int try_again;
int fate=0;
vms_vector frame_vec; //movement in this frame
vms_vector new_pos,ipos; //position after this frame
int count=0;
int objnum;
int WallHitSeg, WallHitSide;
fvi_info hit_info;
fvi_query fq;
vms_vector save_pos;
int save_seg;
fix drag;
fix sim_time;
vms_vector start_pos;
int obj_stopped=0;
fix moved_time; //how long objected moved before hit something
physics_info *pi;
int orig_segnum = obj->segnum;
fix PhysTime = (FrameTime<F1_0/30?F1_0/30:FrameTime);
Assert(obj->movement_type == MT_PHYSICS);
#ifndef NDEBUG
if (Dont_move_ai_objects)
if (obj->control_type == CT_AI)
return;
#endif
pi = &obj->mtype.phys_info;
do_physics_sim_rot(obj);
if (!(pi->velocity.x || pi->velocity.y || pi->velocity.z || pi->thrust.x || pi->thrust.y || pi->thrust.z))
return;
objnum = obj-Objects;
n_phys_segs = 0;
/* As this engine was not designed for that high FPS as we intend, we use F1_0/30 max. for sim_time to ensure
scaling and dot products stay accurate and reliable. The object position intended for this frame will be scaled down later,
after the main collision-loop is done.
This won't make collision results be equal in all FPS settings, but hopefully more accurate, the higher our FPS are.
*/
sim_time = PhysTime; //FrameTime;
//debug_obj = obj;
#ifdef EXTRA_DEBUG
//check for correct object segment
if(!get_seg_masks(&obj->pos,obj->segnum,0,__FILE__,__LINE__).centermask==0) {
//Int3(); Removed by Rob 10/5/94
if (!update_object_seg(obj)) {
if (!(Game_mode & GM_MULTI))
Int3();
compute_segment_center(&obj->pos,&Segments[obj->segnum]);
obj->pos.x += objnum;
}
}
#endif
start_pos = obj->pos;
n_ignore_objs = 0;
Assert(obj->mtype.phys_info.brakes==0); //brakes not used anymore?
//if uses thrust, cannot have zero drag
Assert(!(obj->mtype.phys_info.flags&PF_USES_THRUST) || obj->mtype.phys_info.drag!=0);
//do thrust & drag
// NOTE: this always must be dependent on FrameTime, if sim_time differs!
if ((drag = obj->mtype.phys_info.drag) != 0) {
int count;
vms_vector accel;
fix r,k,have_accel;
count = FrameTime / FT;
r = FrameTime % FT;
k = fixdiv(r,FT);
if (obj->mtype.phys_info.flags & PF_USES_THRUST) {
vm_vec_copy_scale(&accel,&obj->mtype.phys_info.thrust,fixdiv(f1_0,obj->mtype.phys_info.mass));
have_accel = (accel.x || accel.y || accel.z);
while (count--) {
if (have_accel)
vm_vec_add2(&obj->mtype.phys_info.velocity,&accel);
vm_vec_scale(&obj->mtype.phys_info.velocity,f1_0-drag);
}
//do linear scale on remaining bit of time
vm_vec_scale_add2(&obj->mtype.phys_info.velocity,&accel,k);
if (drag)
vm_vec_scale(&obj->mtype.phys_info.velocity,f1_0-fixmul(k,drag));
}
else if (drag)
{
fix total_drag=f1_0;
while (count--)
total_drag = fixmul(total_drag,f1_0-drag);
//do linear scale on remaining bit of time
total_drag = fixmul(total_drag,f1_0-fixmul(k,drag));
vm_vec_scale(&obj->mtype.phys_info.velocity,total_drag);
}
}
do {
try_again = 0;
//Move the object
vm_vec_copy_scale(&frame_vec, &obj->mtype.phys_info.velocity, sim_time);
if ( (frame_vec.x==0) && (frame_vec.y==0) && (frame_vec.z==0) )
break;
count++;
// If retry count is getting large, then we are trying to do something stupid.
if (count > 8) break; // in original code this was 3 for all non-player objects. still leave us some limit in case fvi goes apeshit.
vm_vec_add(&new_pos,&obj->pos,&frame_vec);
ignore_obj_list[n_ignore_objs] = -1;
fq.p0 = &obj->pos;
fq.startseg = obj->segnum;
fq.p1 = &new_pos;
fq.rad = obj->size;
fq.thisobjnum = objnum;
fq.ignore_obj_list = ignore_obj_list;
fq.flags = FQ_CHECK_OBJS;
if (obj->type == OBJ_WEAPON)
fq.flags |= FQ_TRANSPOINT;
if (obj->type == OBJ_PLAYER)
fq.flags |= FQ_GET_SEGLIST;
fate = find_vector_intersection(&fq,&hit_info);
// Matt: Mike's hack.
if (fate == HIT_OBJECT) {
object *objp = &Objects[hit_info.hit_object];
if (((objp->type == OBJ_WEAPON) && (objp->id == PROXIMITY_ID)) || objp->type == OBJ_POWERUP) // do not increase count for powerups since they *should* not change our movement
count--;
}
#ifndef NDEBUG
if (fate == HIT_BAD_P0) {
Int3();
}
#endif
if (obj->type == OBJ_PLAYER) {
int i;
if (n_phys_segs && phys_seglist[n_phys_segs-1]==hit_info.seglist[0])
n_phys_segs--;
for (i=0;(i<hit_info.n_segs) && (n_phys_segs<MAX_FVI_SEGS-1); )
phys_seglist[n_phys_segs++] = hit_info.seglist[i++];
}
ipos = hit_info.hit_pnt;
iseg = hit_info.hit_seg;
WallHitSide = hit_info.hit_side;
WallHitSeg = hit_info.hit_side_seg;
if (iseg==-1) { //some sort of horrible error
if (obj->type == OBJ_WEAPON)
obj->flags |= OF_SHOULD_BE_DEAD;
break;
}
Assert(!((fate==HIT_WALL) && ((WallHitSeg == -1) || (WallHitSeg > Highest_segment_index))));
//if(!get_seg_masks(&hit_info.hit_pnt,hit_info.hit_seg,0).centermask==0)
// Int3();
save_pos = obj->pos; //save the object's position
save_seg = obj->segnum;
// update object's position and segment number
obj->pos = ipos;
if ( iseg != obj->segnum )
obj_relink(objnum, iseg );
//if start point not in segment, move object to center of segment
if (get_seg_masks(&obj->pos,obj->segnum,0,__FILE__,__LINE__).centermask!=0) {
int n;
if ((n=find_object_seg(obj))==-1) {
//Int3();
if (obj->type==OBJ_PLAYER && (n=find_point_seg(&obj->last_pos,obj->segnum))!=-1) {
obj->pos = obj->last_pos;
obj_relink(objnum, n );
}
else {
compute_segment_center(&obj->pos,&Segments[obj->segnum]);
obj->pos.x += objnum;
}
if (obj->type == OBJ_WEAPON)
obj->flags |= OF_SHOULD_BE_DEAD;
}
return;
}
//calulate new sim time
{
//vms_vector moved_vec;
vms_vector moved_vec_n;
fix attempted_dist,actual_dist;
actual_dist = vm_vec_normalized_dir(&moved_vec_n,&obj->pos,&save_pos);
if (fate==HIT_WALL && vm_vec_dot(&moved_vec_n,&frame_vec) < 0) { //moved backwards
//don't change position or sim_time
obj->pos = save_pos;
//iseg = obj->segnum; //don't change segment
obj_relink(objnum, save_seg );
moved_time = 0;
}
else {
fix old_sim_time;
attempted_dist = vm_vec_mag(&frame_vec);
old_sim_time = sim_time;
sim_time = fixmuldiv(sim_time,attempted_dist-actual_dist,attempted_dist);
moved_time = old_sim_time - sim_time;
if (sim_time < 0 || sim_time>old_sim_time) {
sim_time = old_sim_time;
//WHY DOES THIS HAPPEN??
moved_time = 0;
}
}
}
switch( fate ) {
case HIT_WALL: {
vms_vector moved_v;
fix hit_speed=0, wall_part=0;
// Find hit speed
vm_vec_sub(&moved_v,&obj->pos,&save_pos);
wall_part = vm_vec_dot(&moved_v,&hit_info.hit_wallnorm);
if ((wall_part != 0 && moved_time>0 && (hit_speed=-fixdiv(wall_part,moved_time))>0) || obj->type == OBJ_WEAPON || obj->type == OBJ_DEBRIS)
collide_object_with_wall( obj, hit_speed, WallHitSeg, WallHitSide, &hit_info.hit_pnt );
if (obj->type == OBJ_PLAYER)
scrape_player_on_wall(obj, WallHitSeg, WallHitSide, &hit_info.hit_pnt );
Assert( WallHitSeg > -1 );
Assert( WallHitSide > -1 );
if ( !(obj->flags&OF_SHOULD_BE_DEAD) ) {
Assert(! (obj->mtype.phys_info.flags & PF_STICK && obj->mtype.phys_info.flags & PF_BOUNCE)); //can't be bounce and stick
if (obj->mtype.phys_info.flags & PF_STICK) { //stop moving
add_stuck_object(obj, WallHitSeg, WallHitSide);
vm_vec_zero(&obj->mtype.phys_info.velocity);
obj_stopped = 1;
try_again = 0;
}
else { // Slide object along wall
//We're constrained by wall, so subtract wall part from
//velocity vector
wall_part = vm_vec_dot(&hit_info.hit_wallnorm,&obj->mtype.phys_info.velocity);
// if wall_part, make sure the value is sane enough to get usable velocity computed
if (wall_part < 0 && wall_part > -f1_0) wall_part = -f1_0;
if (wall_part > 0 && wall_part < f1_0) wall_part = f1_0;
if (obj->mtype.phys_info.flags & PF_BOUNCE) //bounce off wall
wall_part *= 2; //Subtract out wall part twice to achieve bounce
vm_vec_scale_add2(&obj->mtype.phys_info.velocity,&hit_info.hit_wallnorm,-wall_part);
try_again = 1;
}
}
break;
}
case HIT_OBJECT: {
vms_vector old_vel;
// Mark the hit object so that on a retry the fvi code
// ignores this object.
Assert(hit_info.hit_object != -1);
// Calculcate the hit point between the two objects.
{ vms_vector *ppos0, *ppos1, pos_hit;
fix size0, size1;
ppos0 = &Objects[hit_info.hit_object].pos;
ppos1 = &obj->pos;
size0 = Objects[hit_info.hit_object].size;
size1 = obj->size;
Assert(size0+size1 != 0); // Error, both sizes are 0, so how did they collide, anyway?!?
//vm_vec_scale(vm_vec_sub(&pos_hit, ppos1, ppos0), fixdiv(size0, size0 + size1));
//vm_vec_add2(&pos_hit, ppos0);
vm_vec_sub(&pos_hit, ppos1, ppos0);
vm_vec_scale_add(&pos_hit,ppos0,&pos_hit,fixdiv(size0, size0 + size1));
old_vel = obj->mtype.phys_info.velocity;
collide_two_objects( obj, &Objects[hit_info.hit_object], &pos_hit);
}
// Let object continue its movement
if ( !(obj->flags&OF_SHOULD_BE_DEAD) ) {
//obj->pos = save_pos;
if (obj->mtype.phys_info.flags&PF_PERSISTENT || (old_vel.x == obj->mtype.phys_info.velocity.x && old_vel.y == obj->mtype.phys_info.velocity.y && old_vel.z == obj->mtype.phys_info.velocity.z)) {
//if (Objects[hit_info.hit_object].type == OBJ_POWERUP)
ignore_obj_list[n_ignore_objs++] = hit_info.hit_object;
try_again = 1;
}
}
break;
}
case HIT_NONE:
break;
#ifndef NDEBUG
case HIT_BAD_P0:
Int3(); // Unexpected collision type: start point not in specified segment.
break;
default:
// Unknown collision type returned from find_vector_intersection!!
Int3();
break;
#endif
}
} while ( try_again );
// Pass retry count info to AI.
if (obj->control_type == CT_AI) {
if (count > 0) {
Ai_local_info[objnum].retry_count = count-1;
Total_retries += count-1;
Total_sims++;
}
}
// As sim_time may not base on FrameTime, scale actual object position to get accurate movement
if (PhysTime/FrameTime > 0)
{
vms_vector md;
vm_vec_sub(&md, &obj->pos, &start_pos);
vm_vec_scale(&md, F1_0/((float)PhysTime/FrameTime));
vm_vec_add(&obj->pos,&start_pos, &md);
//check for and update correct object segment
if(!get_seg_masks(&obj->pos, obj->segnum, 0, __FILE__, __LINE__).centermask == 0)
{
if (!update_object_seg(obj)) {
if (!(Game_mode & GM_MULTI))
Int3();
compute_segment_center(&obj->pos,&Segments[obj->segnum]);
obj->pos.x += objnum;
}
}
}
// After collision with objects and walls, set velocity from actual movement
if (!obj_stopped
&& ((obj->type == OBJ_PLAYER) || (obj->type == OBJ_ROBOT) || (obj->type == OBJ_DEBRIS))
&& ((fate == HIT_WALL) || (fate == HIT_OBJECT) || (fate == HIT_BAD_P0))
)
{
vms_vector moved_vec;
vm_vec_sub(&moved_vec,&obj->pos,&start_pos);
vm_vec_copy_scale(&obj->mtype.phys_info.velocity,&moved_vec,fixdiv(f1_0,FrameTime));
}
fix_illegal_wall_intersection(obj, &start_pos);
//Assert(check_point_in_seg(&obj->pos,obj->segnum,0).centermask==0);
//if (obj->control_type == CT_FLYING)
if (obj->mtype.phys_info.flags & PF_LEVELLING)
do_physics_align_object( obj );
//hack to keep player from going through closed doors
if (obj->type==OBJ_PLAYER && obj->segnum!=orig_segnum && (!cheats.ghostphysics) ) {
int sidenum;
sidenum = find_connect_side(&Segments[obj->segnum],&Segments[orig_segnum]);
if (sidenum != -1) {
if (! (WALL_IS_DOORWAY(&Segments[orig_segnum],sidenum) & WID_FLY_FLAG)) {
side *s;
int vertnum,num_faces,i;
fix dist;
int vertex_list[6];
//bump object back
s = &Segments[orig_segnum].sides[sidenum];
create_abs_vertex_lists( &num_faces, vertex_list, orig_segnum, sidenum, __FILE__,__LINE__);
//let's pretend this wall is not triangulated
vertnum = vertex_list[0];
for (i=1;i<4;i++)
if (vertex_list[i] < vertnum)
vertnum = vertex_list[i];
#ifdef COMPACT_SEGS
{
vms_vector _vn;
get_side_normal(&Segments[orig_segnum], sidenum, 0, &_vn );
dist = vm_dist_to_plane(&start_pos, &_vn, &Vertices[vertnum]);
vm_vec_scale_add(&obj->pos,&start_pos,&_vn,obj->size-dist);
}
#else
dist = vm_dist_to_plane(&start_pos, &s->normals[0], &Vertices[vertnum]);
vm_vec_scale_add(&obj->pos,&start_pos,&s->normals[0],obj->size-dist);
#endif
update_object_seg(obj);
}
}
}
//--WE ALWYS WANT THIS IN, MATT AND MIKE DECISION ON 12/10/94, TWO MONTHS AFTER FINAL #ifndef NDEBUG
//if end point not in segment, move object to last pos, or segment center
if (get_seg_masks(&obj->pos,obj->segnum,0,__FILE__,__LINE__).centermask!=0) {
if (find_object_seg(obj)==-1) {
int n;
//Int3();
if (obj->type==OBJ_PLAYER && (n=find_point_seg(&obj->last_pos,obj->segnum))!=-1) {
obj->pos = obj->last_pos;
obj_relink(objnum, n );
}
else {
compute_segment_center(&obj->pos,&Segments[obj->segnum]);
obj->pos.x += objnum;
}
if (obj->type == OBJ_WEAPON)
obj->flags |= OF_SHOULD_BE_DEAD;
}
}
//--WE ALWYS WANT THIS IN, MATT AND MIKE DECISION ON 12/10/94, TWO MONTHS AFTER FINAL #endif
}
// Adds velocity to position
// finds velocity and displacement in local coords
void physics_sim_vel(vec3d * position, physics_info * pi, float sim_time, matrix *orient)
{
vec3d local_disp; // displacement in this frame
vec3d local_v_in; // velocity in local coords at the start of this frame
vec3d local_desired_vel; // desired velocity in local coords
vec3d local_v_out; // velocity in local coords following this frame
vec3d damp;
// Maybe clear the reduced_damp flag.
// This fixes the problem of the player getting near-instantaneous acceleration under unknown circumstances.
// The larger problem is probably that PF_USE_VEL is getting stuck set.
if ((pi->flags & PF_REDUCED_DAMP) && (timestamp_elapsed(pi->reduced_damp_decay))) {
pi->flags &= ~PF_REDUCED_DAMP;
}
// Set up damping constants based on special conditions
// ie. shockwave, collision, weapon, dead
if (pi->flags & PF_DEAD_DAMP) {
// side_slip_time_const is already quite large and now needs to be applied in all directions
vm_vec_make( &damp, pi->side_slip_time_const, pi->side_slip_time_const, pi->side_slip_time_const );
} else if (pi->flags & PF_REDUCED_DAMP) {
// case of shock, weapon, collide, etc.
if ( timestamp_elapsed(pi->reduced_damp_decay) ) {
vm_vec_make( &damp, pi->side_slip_time_const, pi->side_slip_time_const, 0.0f );
} else {
// damp is multiplied by fraction and not fraction^2, gives better collision separation
float reduced_damp_fraction_time_left = timestamp_until( pi->reduced_damp_decay ) / (float) REDUCED_DAMP_TIME;
damp.xyz.x = pi->side_slip_time_const * ( 1 + (REDUCED_DAMP_FACTOR-1) * reduced_damp_fraction_time_left );
damp.xyz.y = pi->side_slip_time_const * ( 1 + (REDUCED_DAMP_FACTOR-1) * reduced_damp_fraction_time_left );
damp.xyz.z = pi->side_slip_time_const * reduced_damp_fraction_time_left * REDUCED_DAMP_FACTOR;
}
} else {
// regular damping
if (pi->use_newtonian_damp) {
vm_vec_make( &damp, pi->side_slip_time_const, pi->side_slip_time_const, pi->side_slip_time_const );
} else {
vm_vec_make( &damp, pi->side_slip_time_const, pi->side_slip_time_const, 0.0f );
}
}
// Note: CANNOT maintain a *local velocity* since a rotation can occur in this frame.
// thus the local velocity of in the next frame can be different (this would require rotate to change local vel
// and this is not desired
// get local components of current velocity
vm_vec_rotate (&local_v_in, &pi->vel, orient);
// get local components of desired velocity
vm_vec_rotate (&local_desired_vel, &pi->desired_vel, orient);
// find updated LOCAL velocity and position in the local x direction
apply_physics (damp.xyz.x, local_desired_vel.xyz.x, local_v_in.xyz.x, sim_time, &local_v_out.xyz.x, &local_disp.xyz.x);
// find updated LOCAL velocity and position in the local y direction
apply_physics (damp.xyz.y, local_desired_vel.xyz.y, local_v_in.xyz.y, sim_time, &local_v_out.xyz.y, &local_disp.xyz.y);
// find updated LOCAL velocity and position in the local z direction
// for player ship, damp should normally be zero, but may be altered in a shockwave
// in death, shockwave,etc. we want damping time const large for all 3 axes
// warp in test - make excessive speed drop exponentially from max allowed
// become (0.01x in 3 sec)
int special_warp_in = FALSE;
float excess = local_v_in.xyz.z - pi->max_vel.xyz.z;
if (excess > 5 && (pi->flags & PF_SPECIAL_WARP_IN)) {
special_warp_in = TRUE;
float exp_factor = float(exp(-sim_time / SPECIAL_WARP_T_CONST));
local_v_out.xyz.z = pi->max_vel.xyz.z + excess * exp_factor;
local_disp.xyz.z = (pi->max_vel.xyz.z * sim_time) + excess * (float(SPECIAL_WARP_T_CONST) * (1.0f - exp_factor));
} else if (pi->flags & PF_SPECIAL_WARP_OUT) {
float exp_factor = float(exp(-sim_time / SPECIAL_WARP_T_CONST));
vec3d temp;
vm_vec_rotate(&temp, &pi->prev_ramp_vel, orient);
float deficeit = temp.xyz.z - local_v_in.xyz.z;
local_v_out.xyz.z = local_v_in.xyz.z + deficeit * (1.0f - exp_factor);
local_disp.xyz.z = (local_v_in.xyz.z * sim_time) + deficeit * (sim_time - (float(SPECIAL_WARP_T_CONST) * (1.0f - exp_factor)));
} else {
apply_physics (damp.xyz.z, local_desired_vel.xyz.z, local_v_in.xyz.z, sim_time, &local_v_out.xyz.z, &local_disp.xyz.z);
}
// maybe turn off special warp in flag
if ((pi->flags & PF_SPECIAL_WARP_IN) && (excess < 5)) {
pi->flags &= ~(PF_SPECIAL_WARP_IN);
}
// update world position from local to world coords using orient
vec3d world_disp;
vm_vec_unrotate (&world_disp, &local_disp, orient);
vm_vec_add2 (position, &world_disp);
// update world velocity
vm_vec_unrotate(&pi->vel, &local_v_out, orient);
if (special_warp_in) {
vm_vec_rotate(&pi->prev_ramp_vel, &pi->vel, orient);
}
}