Light::Light(LightType t, float x, float y, float z, float r, float g, float b, float konst/* =1.0f */, float linear/* =0.0f */, float quad/* =0.0f */)
{
type = t;
position = vec3(x, y, z);
if(t == DIRECTIONAL)
TransformDirection(position, currMatrix);
else
TransformPosition(position, currMatrix);
color = Color(r, g, b);
attenuation = vec3(konst, linear, quad);
if(type == DIRECTIONAL)
lightDir = glm::normalize(position);
}
static void ExportSection(ExportContext& Context, const CBaseMeshLod& Lod, const CMeshVertex* Verts, int SectonIndex, FArchive& Ar)
{
guard(ExportSection);
int VertexSize = Context.IsSkeletal() ? sizeof(CSkelMeshVertex) : sizeof(CStaticMeshVertex);
const CMeshSection& S = Lod.Sections[SectonIndex];
bool bLast = (SectonIndex == Lod.Sections.Num()-1);
// Remap section indices to local indices
CIndexBuffer::IndexAccessor_t GetIndex = Lod.Indices.GetAccessor();
TArray<int> indexRemap; // old vertex index -> new vertex index
indexRemap.Init(-1, Lod.NumVerts);
int numLocalVerts = 0;
int numLocalIndices = S.NumFaces * 3;
for (int idx = 0; idx < numLocalIndices; idx++)
{
int vertIndex = GetIndex(S.FirstIndex + idx);
if (indexRemap[vertIndex] == -1)
{
indexRemap[vertIndex] = numLocalVerts++;
}
}
// Prepare buffers
int IndexBufIndex = Context.Data.AddZeroed();
int PositionBufIndex = Context.Data.AddZeroed();
int NormalBufIndex = Context.Data.AddZeroed();
int TangentBufIndex = Context.Data.AddZeroed();
int BonesBufIndex = -1;
int WeightsBufIndex = -1;
if (Context.IsSkeletal())
{
BonesBufIndex = Context.Data.AddZeroed();
WeightsBufIndex = Context.Data.AddZeroed();
}
int UVBufIndex[MAX_MESH_UV_SETS];
for (int i = 0; i < Lod.NumTexCoords; i++)
{
UVBufIndex[i] = Context.Data.AddZeroed();
}
BufferData& IndexBuf = Context.Data[IndexBufIndex];
BufferData& PositionBuf = Context.Data[PositionBufIndex];
BufferData& NormalBuf = Context.Data[NormalBufIndex];
BufferData& TangentBuf = Context.Data[TangentBufIndex];
BufferData* UVBuf[MAX_MESH_UV_SETS];
BufferData* BonesBuf = NULL;
BufferData* WeightsBuf = NULL;
PositionBuf.Setup(numLocalVerts, "VEC3", BufferData::FLOAT, sizeof(CVec3));
NormalBuf.Setup(numLocalVerts, "VEC3", BufferData::FLOAT, sizeof(CVec3));
TangentBuf.Setup(numLocalVerts, "VEC4", BufferData::FLOAT, sizeof(CVec4));
for (int i = 0; i < Lod.NumTexCoords; i++)
{
UVBuf[i] = &Context.Data[UVBufIndex[i]];
UVBuf[i]->Setup(numLocalVerts, "VEC2", BufferData::FLOAT, sizeof(CMeshUVFloat));
}
if (Context.IsSkeletal())
{
BonesBuf = &Context.Data[BonesBufIndex];
WeightsBuf = &Context.Data[WeightsBufIndex];
BonesBuf->Setup(numLocalVerts, "VEC4", BufferData::UNSIGNED_SHORT, sizeof(uint16)*4);
WeightsBuf->Setup(numLocalVerts, "VEC4", BufferData::UNSIGNED_BYTE, sizeof(uint32), /*InNormalized=*/ true);
}
// Prepare and build indices
TArray<int> localIndices;
localIndices.AddUninitialized(numLocalIndices);
int* pIndex = localIndices.GetData();
for (int i = 0; i < numLocalIndices; i++)
{
*pIndex++ = GetIndex(S.FirstIndex + i);
}
if (numLocalVerts <= 65536)
{
IndexBuf.Setup(numLocalIndices, "SCALAR", BufferData::UNSIGNED_SHORT, sizeof(uint16));
for (int idx = 0; idx < numLocalIndices; idx++)
{
IndexBuf.Put<uint16>(indexRemap[localIndices[idx]]);
}
}
else
{
IndexBuf.Setup(numLocalIndices, "SCALAR", BufferData::UNSIGNED_INT, sizeof(uint32));
for (int idx = 0; idx < numLocalIndices; idx++)
{
IndexBuf.Put<uint32>(indexRemap[localIndices[idx]]);
}
}
// Build reverse index map for fast lookup of vertex by its new index.
// It maps new vertex index to old vertex index.
TArray<int> revIndexMap;
revIndexMap.AddUninitialized(numLocalVerts);
for (int i = 0; i < indexRemap.Num(); i++)
{
int newIndex = indexRemap[i];
if (newIndex != -1)
{
revIndexMap[newIndex] = i;
}
}
// Build vertices
for (int i = 0; i < numLocalVerts; i++)
{
int vertIndex = revIndexMap[i];
const CMeshVertex& V = VERT(vertIndex);
CVec3 Position = V.Position;
CVec4 Normal, Tangent;
Unpack(Normal, V.Normal);
Unpack(Tangent, V.Tangent);
// Unreal (and we are) using normal.w for computing binormal. glTF
// uses tangent.w for that. Make this value exactly 1.0 of -1.0 to make glTF
// validator happy.
#if 0
// There's some problem: V.Normal.W == 0x80 -> -1.008 instead of -1.0
if (Normal.w > 1.001 || Normal.w < -1.001)
{
appError("%X -> %g\n", V.Normal.Data, Normal.w);
}
#endif
Tangent.w = (Normal.w < 0) ? -1 : 1;
TransformPosition(Position);
TransformDirection(Normal);
TransformDirection(Tangent);
Normal.Normalize();
Tangent.Normalize();
// Fill buffers
PositionBuf.Put(Position);
NormalBuf.Put(Normal.xyz);
TangentBuf.Put(Tangent);
UVBuf[0]->Put(V.UV);
}
// Compute bounds for PositionBuf
CVec3 Mins, Maxs;
ComputeBounds((CVec3*)PositionBuf.Data, numLocalVerts, sizeof(CVec3), Mins, Maxs);
char buf[256];
appSprintf(ARRAY_ARG(buf), "[ %g, %g, %g ]", VECTOR_ARG(Mins));
PositionBuf.BoundsMin = buf;
appSprintf(ARRAY_ARG(buf), "[ %g, %g, %g ]", VECTOR_ARG(Maxs));
PositionBuf.BoundsMax = buf;
if (Context.IsSkeletal())
{
for (int i = 0; i < numLocalVerts; i++)
{
int vertIndex = revIndexMap[i];
const CMeshVertex& V0 = VERT(vertIndex);
const CSkelMeshVertex& V = static_cast<const CSkelMeshVertex&>(V0);
int16 Bones[NUM_INFLUENCES];
static_assert(NUM_INFLUENCES == 4, "Code designed for 4 influences");
static_assert(sizeof(Bones) == sizeof(V.Bone), "Unexpected V.Bones size");
memcpy(Bones, V.Bone, sizeof(Bones));
for (int j = 0; j < NUM_INFLUENCES; j++)
{
// We have INDEX_NONE as list terminator, should replace with something else for glTF
if (Bones[j] == INDEX_NONE)
{
Bones[j] = 0;
}
}
BonesBuf->Put(*(uint64*)&Bones);
WeightsBuf->Put(V.PackedWeights);
}
}
// Secondary UVs
for (int uvIndex = 1; uvIndex < Lod.NumTexCoords; uvIndex++)
{
BufferData* pBuf = UVBuf[uvIndex];
const CMeshUVFloat* srcUV = Lod.ExtraUV[uvIndex-1];
for (int i = 0; i < numLocalVerts; i++)
{
int vertIndex = revIndexMap[i];
pBuf->Put(srcUV[vertIndex]);
}
}
// Write primitive information to json
Ar.Printf(
" {\n"
" \"attributes\" : {\n"
" \"POSITION\" : %d,\n"
" \"NORMAL\" : %d,\n"
" \"TANGENT\" : %d,\n",
PositionBufIndex, NormalBufIndex, TangentBufIndex
);
if (Context.IsSkeletal())
{
Ar.Printf(
" \"JOINTS_0\" : %d,\n"
" \"WEIGHTS_0\" : %d,\n",
BonesBufIndex, WeightsBufIndex
);
}
for (int i = 0; i < Lod.NumTexCoords; i++)
{
Ar.Printf(
" \"TEXCOORD_%d\" : %d%s\n",
i, UVBufIndex[i], i < (Lod.NumTexCoords-1) ? "," : ""
);
}
Ar.Printf(
" },\n"
" \"indices\" : %d,\n"
" \"material\" : %d\n"
" }%s\n",
IndexBufIndex, SectonIndex,
SectonIndex < (Lod.Sections.Num()-1) ? "," : ""
);
unguard;
}
void TransformRay(Ray &ray, const mat4 &matrix)
{
TransformPosition(ray.origin, matrix);
TransformDirection(ray.direction, matrix);
ray.direction = glm::normalize(ray.direction);
}
