Method BuildVertexBuffer

source/common/models/models_md3.cpp:243–298

//===========================================================================

void FMD3Model::BuildVertexBuffer(FModelRenderer *renderer)
{
	if (!GetVertexBuffer(renderer->GetType()))
	{
		LoadGeometry();

		unsigned int vbufsize = 0;
		unsigned int ibufsize = 0;

		for (unsigned i = 0; i < Surfaces.Size(); i++)
		{
			MD3Surface * surf = &Surfaces[i];
			vbufsize += Frames.Size() * surf->numVertices;
			ibufsize += 3 * surf->numTriangles;
		}

		auto vbuf = renderer->CreateVertexBuffer(true, Frames.Size() == 1);
		SetVertexBuffer(renderer->GetType(), vbuf);

		FModelVertex *vertptr = vbuf->LockVertexBuffer(vbufsize);
		unsigned int *indxptr = vbuf->LockIndexBuffer(ibufsize);

		assert(vertptr != nullptr && indxptr != nullptr);

		unsigned int vindex = 0, iindex = 0;

		for (unsigned i = 0; i < Surfaces.Size(); i++)
		{
			MD3Surface * surf = &Surfaces[i];

			surf->vindex = vindex;
			surf->iindex = iindex;
			for (unsigned j = 0; j < Frames.Size() * surf->numVertices; j++)
			{
				MD3Vertex* vert = &surf->Vertices[j];

				FModelVertex *bvert = &vertptr[vindex++];

				int tc = j % surf->numVertices;
				bvert->Set(vert->x, vert->z, vert->y, surf->Texcoords[tc].s, surf->Texcoords[tc].t);
				bvert->SetNormal(vert->nx, vert->nz, vert->ny);
			}

			for (unsigned k = 0; k < surf->numTriangles; k++)
			{
				for (int l = 0; l < 3; l++)
				{
					indxptr[iindex++] = surf->Tris[k].VertIndex[l];
				}
			}
			surf->UnloadGeometry();
		}
		vbuf->UnlockVertexBuffer();
		vbuf->UnlockIndexBuffer();
	}
}