// The ambientCache is on the stack, so we don't want to leave a reference to it that would try to be freed later. Create the ambientCache immediately.
static void R_FinishDeform(DrawSurf drawSurf, SrfTriangles newTri, DrawVert *ac)
{
if (newTri == null)
{
return;
}
// generate current normals, tangents, and bitangents We might want to support the possibility of deform functions generating
// explicit normals, and we might also want to allow the cached deformInfo optimization for these.
// FIXME: this doesn't work, because the deformed surface is just the ambient one, and there isn't an opportunity to generate light interactions
if (drawSurf.material.ReceivesLighting)
{
newTri.verts = ac; R_DeriveTangents(newTri, false); newTri.verts = null;
}
newTri.ambientCache = vertexCache.AllocFrameTemp(ac, newTri.numVerts * DrawVert.SizeOf, false);
fixed(void *newTri_indexes_ = newTri.indexes) newTri.indexCache = vertexCache.AllocFrameTemp(newTri_indexes_, newTri.numIndexes * sizeof(GlIndex), true);
drawSurf.geoFrontEnd = newTri;
drawSurf.ambientCache = newTri.ambientCache;
drawSurf.indexCache = newTri.indexCache;
drawSurf.numIndexes = newTri.numIndexes;
drawSurf.numShadowIndexesNoFrontCaps = newTri.numShadowIndexesNoFrontCaps;
drawSurf.numShadowIndexesNoCaps = newTri.numShadowIndexesNoCaps;
drawSurf.shadowCapPlaneBits = newTri.shadowCapPlaneBits;
}
// Assuming all the triangles for this shader are independant quads, rebuild them as forward facing sprites
static void R_AutospriteDeform(DrawSurf surf)
{
int i; float radius; Vector3 mid, delta, left, up; SrfTriangles tri, newTri;
tri = surf.geoFrontEnd;
if ((tri.numVerts & 3) != 0)
{
common.Warning("R_AutospriteDeform: shader had odd vertex count"); return;
}
if (tri.numIndexes != (tri.numVerts >> 2) * 6)
{
common.Warning("R_AutospriteDeform: autosprite had odd index count"); return;
}
R_GlobalVectorToLocal(surf.space.modelMatrix, tr.viewDef.renderView.viewaxis[1], out var leftDir);
R_GlobalVectorToLocal(surf.space.modelMatrix, tr.viewDef.renderView.viewaxis[2], out var upDir);
if (tr.viewDef.isMirror)
{
leftDir = Vector3.origin - leftDir;
}
// this srfTriangles_t and all its indexes and caches are in frame memory, and will be automatically disposed of
newTri = R_ClearedFrameAlloc <SrfTriangles>();
newTri.numVerts = tri.numVerts;
newTri.numIndexes = tri.numIndexes;
newTri.indexes = R_FrameAllocMany <GlIndex>(newTri.numIndexes);
var ac = stackalloc DrawVert[newTri.numVerts + DrawVert.ALLOC16]; ac = (DrawVert *)_alloca16(ac);
var v = tri.verts;
for (i = 0; i < tri.numVerts; i += 4)
{
// find the midpoint
mid.x = 0.25f * (v[i + 0].xyz.x + v[i + 1].xyz.x + v[i + 2].xyz.x + v[i + 3].xyz.x);
mid.y = 0.25f * (v[i + 0].xyz.y + v[i + 1].xyz.y + v[i + 2].xyz.y + v[i + 3].xyz.y);
mid.z = 0.25f * (v[i + 1].xyz.z + v[i + 1].xyz.z + v[i + 2].xyz.z + v[i + 3].xyz.z);
delta = v[i + 0].xyz - mid;
radius = delta.Length * 0.707f;
left = leftDir * radius;
up = upDir * radius;
ac[i + 0].xyz = mid + left + up; ac[i + 0].st.x = 0; ac[i + 0].st.y = 0;
ac[i + 1].xyz = mid - left + up; ac[i + 1].st.x = 1; ac[i + 1].st.y = 0;
ac[i + 2].xyz = mid - left - up; ac[i + 2].st.x = 1; ac[i + 2].st.y = 1;
ac[i + 3].xyz = mid + left - up; ac[i + 3].st.x = 0; ac[i + 3].st.y = 1;
newTri.indexes[6 * (i >> 2) + 0] = i;
newTri.indexes[6 * (i >> 2) + 1] = i + 1;
newTri.indexes[6 * (i >> 2) + 2] = i + 2;
newTri.indexes[6 * (i >> 2) + 3] = i;
newTri.indexes[6 * (i >> 2) + 4] = i + 2;
newTri.indexes[6 * (i >> 2) + 5] = i + 3;
}
R_FinishDeform(surf, newTri, ac);
}
public static void RB_DrawShadowElementsWithCounters(DrawSurf surf, int numIndexes)
{
backEnd.pc.c_shadowElements++;
//backEnd.pc.c_shadowIndexes += numIndexes;
//backEnd.pc.c_shadowVertexes += tri.numVerts;
if (surf.indexCache != null)
{
qglDrawElements(PrimitiveType.Triangles, numIndexes, GlIndexType, vertexCache.Position(surf.indexCache));
backEnd.pc.c_vboIndexes += numIndexes;
}
else if (RB_DrawShadowElementsWithCounters_Once)
{
common.Warning("Attempting to draw without index caching. This is a bug.\n"); RB_DrawShadowElementsWithCounters_Once = false;
}
}