geometryc benchmark

geometryc.txt

I have tested two large obj file with geometryc.


ApCity               uncompressed     zip            lzma
No Index compress      1,366,519      486,989       337,053
Index compress         1,244,034      432,734       296,368
Index+Vertex DWORD     1,244,034      388,990       300,717

Salle
No Index compress     28,663,702     17,863,876    11,664,913
Index compress        23,113,376     15,139,086    10,015,495
Index+Vertex DWORD    23,113,376     13,574,481    10,216,997

Horde3D geometry format stores vertex data per channel instead of the interleaved format that geometryc uses.
I tried deinterleaving the data that seems to be good for zip compression but bad for lzma.
We are using lzma for package compression on mobile. So geometryc's method is better.

Vertex DWORD compression
#if 0
	
	int numDwords = stride / 4;
	
	for (uint32_t dw = 0; dw < numDwords; ++dw)
		
		for (uint32_t v = 0; v < _numVertices; ++v)
			
			write(_writer, _vertices + v * stride + dw * 4, 4);

#else
	
	write(_writer, _vertices, _numVertices*stride);

#endif