static qboolean IsMirror( const drawSurf_t *drawSurf, int entityNum )
{
int i;
cplane_t originalPlane, plane;
trRefEntity_t *e;
float d;
// create plane axis for the portal we are seeing
R_PlaneForSurface( drawSurf->surface, &originalPlane );
// rotate the plane if necessary
if ( entityNum != REFENTITYNUM_WORLD )
{
tr.currentEntityNum = entityNum;
tr.currentEntity = &tr.refdef.entities[entityNum];
// get the orientation of the entity
R_RotateForEntity( tr.currentEntity, &tr.viewParms, &tr.ori );
// rotate the plane, but keep the non-rotated version for matching
// against the portalSurface entities
R_LocalNormalToWorld( originalPlane.normal, plane.normal );
plane.dist = originalPlane.dist + DotProduct( plane.normal, tr.ori.origin );
// translate the original plane
originalPlane.dist = originalPlane.dist + DotProduct( originalPlane.normal, tr.ori.origin );
}
else
{
plane = originalPlane;
}
// locate the portal entity closest to this plane.
// origin will be the origin of the portal, origin2 will be
// the origin of the camera
for ( i = 0 ; i < tr.refdef.num_entities ; i++ )
{
e = &tr.refdef.entities[i];
if ( e->e.reType != RT_PORTALSURFACE ) {
continue;
}
d = DotProduct( e->e.origin, originalPlane.normal ) - originalPlane.dist;
if ( d > 64 || d < -64) {
continue;
}
// if the entity is just a mirror, don't use as a camera point
if ( e->e.oldorigin[0] == e->e.origin[0] &&
e->e.oldorigin[1] == e->e.origin[1] &&
e->e.oldorigin[2] == e->e.origin[2] )
{
return qtrue;
}
return qfalse;
}
return qfalse;
}
/*
========================
R_MirrorViewBySurface
========================
*/
static viewDef_t *R_MirrorViewBySurface( drawSurf_t *drawSurf ) {
viewDef_t *parms;
orientation_t surface, camera;
idPlane originalPlane, plane;
// copy the viewport size from the original
parms = (viewDef_t *)R_FrameAlloc( sizeof( *parms ) );
*parms = *tr.viewDef;
parms->renderView.viewID = 0; // clear to allow player bodies to show up, and suppress view weapons
parms->isSubview = true;
parms->isMirror = true;
// create plane axis for the portal we are seeing
R_PlaneForSurface( drawSurf->geo, originalPlane );
R_LocalPlaneToGlobal( drawSurf->space->modelMatrix, originalPlane, plane );
surface.origin = plane.Normal() * -plane[3];
surface.axis[0] = plane.Normal();
surface.axis[0].NormalVectors( surface.axis[1], surface.axis[2] );
surface.axis[2] = -surface.axis[2];
camera.origin = surface.origin;
camera.axis[0] = -surface.axis[0];
camera.axis[1] = surface.axis[1];
camera.axis[2] = surface.axis[2];
// set the mirrored origin and axis
R_MirrorPoint( tr.viewDef->renderView.vieworg, &surface, &camera, parms->renderView.vieworg );
R_MirrorVector( tr.viewDef->renderView.viewaxis[0], &surface, &camera, parms->renderView.viewaxis[0] );
R_MirrorVector( tr.viewDef->renderView.viewaxis[1], &surface, &camera, parms->renderView.viewaxis[1] );
R_MirrorVector( tr.viewDef->renderView.viewaxis[2], &surface, &camera, parms->renderView.viewaxis[2] );
// make the view origin 16 units away from the center of the surface
idVec3 viewOrigin = ( drawSurf->geo->bounds[0] + drawSurf->geo->bounds[1] ) * 0.5;
viewOrigin += ( originalPlane.Normal() * 16 );
R_LocalPointToGlobal( drawSurf->space->modelMatrix, viewOrigin, parms->initialViewAreaOrigin );
// set the mirror clip plane
parms->numClipPlanes = 1;
parms->clipPlanes[0] = -camera.axis[0];
parms->clipPlanes[0][3] = -( camera.origin * parms->clipPlanes[0].Normal() );
return parms;
}
/*
=================
R_GetPortalOrientation
entityNum is the entity that the portal surface is a part of, which may
be moving and rotating.
Returns qtrue if it should be mirrored
=================
*/
qboolean R_GetPortalOrientations( drawSurf_t *drawSurf, int entityNum,
orientation_t *surface, orientation_t *camera,
vec3_t pvsOrigin, qboolean *mirror ) {
int i;
cplane_t originalPlane, plane;
trRefEntity_t *e;
float d;
vec3_t transformed;
// create plane axis for the portal we are seeing
R_PlaneForSurface( drawSurf->surface, &originalPlane );
// rotate the plane if necessary
if ( entityNum != REFENTITYNUM_WORLD ) {
tr.currentEntityNum = entityNum;
tr.currentEntity = &tr.refdef.entities[entityNum];
// get the orientation of the entity
R_RotateForEntity( tr.currentEntity, &tr.viewParms, &tr.ori );
// rotate the plane, but keep the non-rotated version for matching
// against the portalSurface entities
R_LocalNormalToWorld( originalPlane.normal, plane.normal );
plane.dist = originalPlane.dist + DotProduct( plane.normal, tr.ori.origin );
// translate the original plane
originalPlane.dist = originalPlane.dist + DotProduct( originalPlane.normal, tr.ori.origin );
} else {
plane = originalPlane;
}
VectorCopy( plane.normal, surface->axis[0] );
PerpendicularVector( surface->axis[1], surface->axis[0] );
CrossProduct( surface->axis[0], surface->axis[1], surface->axis[2] );
// locate the portal entity closest to this plane.
// origin will be the origin of the portal, origin2 will be
// the origin of the camera
for ( i = 0 ; i < tr.refdef.num_entities ; i++ ) {
e = &tr.refdef.entities[i];
if ( e->e.reType != RT_PORTALSURFACE ) {
continue;
}
d = DotProduct( e->e.origin, originalPlane.normal ) - originalPlane.dist;
if ( d > 64 || d < -64) {
continue;
}
// get the pvsOrigin from the entity
VectorCopy( e->e.oldorigin, pvsOrigin );
// if the entity is just a mirror, don't use as a camera point
if ( e->e.oldorigin[0] == e->e.origin[0] &&
e->e.oldorigin[1] == e->e.origin[1] &&
e->e.oldorigin[2] == e->e.origin[2] ) {
VectorScale( plane.normal, plane.dist, surface->origin );
VectorCopy( surface->origin, camera->origin );
VectorSubtract( vec3_origin, surface->axis[0], camera->axis[0] );
VectorCopy( surface->axis[1], camera->axis[1] );
VectorCopy( surface->axis[2], camera->axis[2] );
*mirror = qtrue;
return qtrue;
}
// project the origin onto the surface plane to get
// an origin point we can rotate around
d = DotProduct( e->e.origin, plane.normal ) - plane.dist;
VectorMA( e->e.origin, -d, surface->axis[0], surface->origin );
// now get the camera origin and orientation
VectorCopy( e->e.oldorigin, camera->origin );
AxisCopy( e->e.axis, camera->axis );
VectorSubtract( vec3_origin, camera->axis[0], camera->axis[0] );
VectorSubtract( vec3_origin, camera->axis[1], camera->axis[1] );
// optionally rotate
if ( e->e.oldframe ) {
// if a speed is specified
if ( e->e.frame ) {
// continuous rotate
d = (tr.refdef.time/1000.0f) * e->e.frame;
VectorCopy( camera->axis[1], transformed );
RotatePointAroundVector( camera->axis[1], camera->axis[0], transformed, d );
CrossProduct( camera->axis[0], camera->axis[1], camera->axis[2] );
} else {
// bobbing rotate, with skinNum being the rotation offset
d = sin( tr.refdef.time * 0.003f );
d = e->e.skinNum + d * 4;
VectorCopy( camera->axis[1], transformed );
RotatePointAroundVector( camera->axis[1], camera->axis[0], transformed, d );
CrossProduct( camera->axis[0], camera->axis[1], camera->axis[2] );
}
}
else if ( e->e.skinNum ) {
d = e->e.skinNum;
VectorCopy( camera->axis[1], transformed );
RotatePointAroundVector( camera->axis[1], camera->axis[0], transformed, d );
CrossProduct( camera->axis[0], camera->axis[1], camera->axis[2] );
}
*mirror = qfalse;
return qtrue;
}
// if we didn't locate a portal entity, don't render anything.
// We don't want to just treat it as a mirror, because without a
// portal entity the server won't have communicated a proper entity set
// in the snapshot
// unfortunately, with local movement prediction it is easily possible
// to see a surface before the server has communicated the matching
// portal surface entity, so we don't want to print anything here...
//ri->Printf( PRINT_ALL, "Portal surface without a portal entity\n" );
return qfalse;
}
/*
========================
R_MirrorViewBySurface
========================
*/
static viewDef_t* R_MirrorViewBySurface( const drawSurf_t* drawSurf )
{
// copy the viewport size from the original
viewDef_t* parms = ( viewDef_t* )R_FrameAlloc( sizeof( *parms ) );
*parms = *tr.viewDef;
parms->renderView.viewID = 0; // clear to allow player bodies to show up, and suppress view weapons
parms->isSubview = true;
parms->isMirror = true;
parms->isObliqueProjection = false;
// create plane axis for the portal we are seeing
idPlane originalPlane, plane;
R_PlaneForSurface( drawSurf->frontEndGeo, originalPlane );
R_LocalPlaneToGlobal( drawSurf->space->modelMatrix, originalPlane, plane );
orientation_t surface;
surface.origin = plane.Normal() * -plane[3];
surface.axis[0] = plane.Normal();
surface.axis[0].NormalVectors( surface.axis[1], surface.axis[2] );
surface.axis[2] = -surface.axis[2];
orientation_t camera;
camera.origin = surface.origin;
camera.axis[0] = -surface.axis[0];
camera.axis[1] = surface.axis[1];
camera.axis[2] = surface.axis[2];
// set the mirrored origin and axis
R_MirrorPoint( tr.viewDef->renderView.vieworg, &surface, &camera, parms->renderView.vieworg );
R_MirrorVector( tr.viewDef->renderView.viewaxis[0], &surface, &camera, parms->renderView.viewaxis[0] );
R_MirrorVector( tr.viewDef->renderView.viewaxis[1], &surface, &camera, parms->renderView.viewaxis[1] );
R_MirrorVector( tr.viewDef->renderView.viewaxis[2], &surface, &camera, parms->renderView.viewaxis[2] );
// make the view origin 16 units away from the center of the surface
const idVec3 center = (drawSurf->frontEndGeo->bounds[0] + drawSurf->frontEndGeo->bounds[1]) * 0.5f;
const idVec3 viewOrigin = center + (originalPlane.Normal() * 16.0f);
R_LocalPointToGlobal(drawSurf->space->modelMatrix, viewOrigin, parms->initialViewAreaOrigin);
// set the mirror clip plane
parms->numClipPlanes = 1;
parms->clipPlanes[0] = -camera.axis[0];
parms->clipPlanes[0][3] = -( camera.origin * parms->clipPlanes[0].Normal() );
if (r_waterReflectFix.GetBool() && !parms->is2Dgui && drawSurf->material->GetSurfaceType() == SURFTYPE_MIRROR)
{
parms->isObliqueProjection = true;
float dist = parms->clipPlanes[0].Dist();
float viewdist = parms->renderView.vieworg * parms->clipPlanes[0].Normal();
float fDist = -dist + viewdist;
static const float fudge = 2.f; //fudge avoids depth precision artifacts when performing oblique projection
if (fDist > fudge || fDist < -fudge)
{
if (fDist < 0.f)
fDist += fudge;
else
fDist -= fudge;
}
parms->clipPlanes[0][3] = fDist;
R_SetupViewMatrix(parms);
R_SetupProjectionMatrix(parms);
R_ObliqueProjection(parms);
}
return parms;
}
