//======================================================================================
// Creates all needed model references in portal areas, chaining them to both the area and the entityDef. Bumps tr.viewCount.
public static void R_CreateEntityRefs(IRenderEntity def)
{
int i; Vector3 v;
var transformed = stackalloc Vector3[8];
if (def.parms.hModel == null)
{
def.parms.hModel = renderModelManager.DefaultModel();
}
// if the entity hasn't been fully specified due to expensive animation calcs for md5 and particles, use the provided conservative bounds.
def.referenceBounds = def.parms.callback != null ? def.parms.bounds : def.parms.hModel.Bounds(def.parms);
// some models, like empty particles, may not need to be added at all
if (def.referenceBounds.IsCleared)
{
return;
}
if (r_showUpdates.Bool && (
def.referenceBounds[1].x - def.referenceBounds[0].x > 1024 ||
def.referenceBounds[1].y - def.referenceBounds[0].y > 1024))
{
common.Printf($"big entityRef: {def.referenceBounds[1].x - def.referenceBounds[0].x},{def.referenceBounds[1].y - def.referenceBounds[0].y}\n");
}
for (i = 0; i < 8; i++)
{
v.x = def.referenceBounds[i & 1][0];
v.y = def.referenceBounds[(i >> 1) & 1][1];
v.z = def.referenceBounds[(i >> 2) & 1][2];
R_LocalPointToGlobal(def.modelMatrix, v, out transformed[i]);
}
// bump the view count so we can tell if an area already has a reference
tr.viewCount++;
// push these points down the BSP tree into areas
def.world.PushVolumeIntoTree(def, null, 8, transformed);
}
// are dangling edges that are outside the light frustum still making planes?
public static SrfTriangles R_CreateVertexProgramTurboShadowVolume(IRenderEntity ent, SrfTriangles tri, IRenderLight light, ref SrfCullInfo cullInfo)
{
int i, j; SrfTriangles newTri; GlIndex[] indexes; byte *facing;
var tri_indexes = tri.indexes; var tri_silEdges = tri.silEdges;
R_CalcInteractionFacing(ent, tri, light, ref cullInfo);
if (r_useShadowProjectedCull.Bool)
{
R_CalcInteractionCullBits(ent, tri, light, ref cullInfo);
}
var numFaces = tri.numIndexes / 3;
var numShadowingFaces = 0;
facing = cullInfo.facing;
// if all the triangles are inside the light frustum
if (cullInfo.cullBits == Interaction.LIGHT_CULL_ALL_FRONT || !r_useShadowProjectedCull.Bool)
{
// count the number of shadowing faces
for (i = 0; i < numFaces; i++)
{
numShadowingFaces += facing[i];
}
numShadowingFaces = numFaces - numShadowingFaces;
}
else
{
// make all triangles that are outside the light frustum "facing", so they won't cast shadows
indexes = tri_indexes;
var modifyFacing = cullInfo.facing;
var cullBits = cullInfo.cullBits;
for (j = i = 0; i < tri.numIndexes; i += 3, j++)
{
if (modifyFacing[j] == 0)
{
var i1 = indexes[i + 0];
var i2 = indexes[i + 1];
var i3 = indexes[i + 2];
if ((cullBits[i1] & cullBits[i2] & cullBits[i3]) != 0)
{
modifyFacing[j] = 1;
}
else
{
numShadowingFaces++;
}
}
}
}
// no faces are inside the light frustum and still facing the right way
if (numShadowingFaces == 0)
{
return(null);
}
// shadowVerts will be NULL on these surfaces, so the shadowVerts will be taken from the ambient surface
newTri = R_AllocStaticTriSurf();
newTri.numVerts = tri.numVerts * 2;
// alloc the max possible size
#if USE_TRI_DATA_ALLOCATOR
R_AllocStaticTriSurfIndexes(newTri, (numShadowingFaces + tri.numSilEdges) * 6);
GlIndex tempIndexes = newTri.indexes;
GlIndex shadowIndexes = newTri.indexes;
#else
GlIndex *tempIndexes = stackalloc GlIndex[tri.numSilEdges * 6 + intX.ALLOC16]; tempIndexes = (GlIndex *)_alloca16(tempIndexes);
GlIndex *shadowIndexes = tempIndexes;
#endif
// create new triangles along sil planes
SilEdge sil;
for (sil = tri_silEdges, i = tri.numSilEdges; i > 0; i--, sil++)
{
int f1 = facing[sil.p1], f2 = facing[sil.p2];
if ((f1 ^ f2) == 0)
{
continue;
}
int v1 = sil.v1 << 1, v2 = sil.v2 << 1;
// set the two triangle winding orders based on facing without using a poorly-predictable branch
shadowIndexes[0] = v1;
shadowIndexes[1] = v2 ^ f1;
shadowIndexes[2] = v2 ^ f2;
shadowIndexes[3] = v1 ^ f2;
shadowIndexes[4] = v1 ^ f1;
shadowIndexes[5] = v2 ^ 1;
shadowIndexes += 6;
}
int numShadowIndexes = shadowIndexes - tempIndexes;
// we aren't bothering to separate front and back caps on these
newTri.numIndexes = newTri.numShadowIndexesNoFrontCaps = numShadowIndexes + numShadowingFaces * 6;
newTri.numShadowIndexesNoCaps = numShadowIndexes;
newTri.shadowCapPlaneBits = SHADOW_CAP_INFINITE;
#if USE_TRI_DATA_ALLOCATOR
// decrease the size of the memory block to only store the used indexes
R_ResizeStaticTriSurfIndexes(newTri, newTri.numIndexes);
#else
// allocate memory for the indexes
R_AllocStaticTriSurfIndexes(newTri, newTri.numIndexes);
// copy the indexes we created for the sil planes
Simd.Memcpy(newTri.indexes, tempIndexes, numShadowIndexes * sizeof(GlIndex));
#endif
// these have no effect, because they extend to infinity
newTri.bounds.Clear();
// put some faces on the model and some on the distant projection
indexes = tri_indexes;
shadowIndexes = newTri.indexes + numShadowIndexes;
for (i = 0, j = 0; i < tri.numIndexes; i += 3, j++)
{
if (facing[j] != 0)
{
continue;
}
var i0 = indexes[i + 0] << 1; shadowIndexes[2] = i0; shadowIndexes[3] = i0 ^ 1;
var i1 = indexes[i + 1] << 1; shadowIndexes[1] = i1; shadowIndexes[4] = i1 ^ 1;
var i2 = indexes[i + 2] << 1; shadowIndexes[0] = i2; shadowIndexes[5] = i2 ^ 1;
shadowIndexes += 6;
}
return(newTri);
}