func initVoxels() {
s := 164096
voxels := glvox.NewOctree(s)
glvox.ReadBinvox("../res/skull256.binvox", voxels, 896, 896, 896)
data := voxels.Index
buf := gl.GenBuffer()
buf.Bind(gl.TEXTURE_BUFFER)
gl.BufferData(gl.TEXTURE_BUFFER, len(data)*4, data, gl.STATIC_DRAW)
gl.ActiveTexture(gl.TEXTURE0)
tex := gl.GenTexture()
tex.Bind(gl.TEXTURE_BUFFER)
gl.TexBuffer(gl.TEXTURE_BUFFER, gl.R32I, buf)
voxelsLoc := prg.GetUniformLocation("voxels")
voxelsLoc.Uniform1i(0)
var value [1]int32
gl.GetIntegerv(gl.MAX_TEXTURE_BUFFER_SIZE, value[:])
fmt.Println("max texture buffer size:", value[0]/1024/1024, "MiB")
sizeLoc := prg.GetUniformLocation("size")
sizeLoc.Uniform1i(int(voxels.Size))
fmt.Println("voxel data uploaded:", len(voxels.Index)*4/1024/1024, "MiB")
}
func TestReadBinvox(t *testing.T) {
voxels := glvox.NewOctree(1256)
err := glvox.ReadBinvox("skull.binvox", voxels, 0, 0, 0)
if err != nil {
t.Error(err)
}
if voxels.Size <= 0 {
t.Error("dimension > 0 expected, was", voxels.Size)
}
indexCount := len(voxels.Index) / 8
if indexCount != 642216 {
t.Error("index size 642216 expected, was", indexCount)
}
longJump := int32(0)
for i := int32(0); i < int32(indexCount); i++ {
for j := int32(0); j < 8; j++ {
idx := voxels.Index[i<<3+j]
if idx <= 0 {
continue
}
jump := idx - i
if jump > longJump {
longJump = jump
}
}
}
fmt.Println("longest jump", longJump)
avgJump := int32(0)
jumpCount := int32(0)
for i := int32(0); i < int32(indexCount); i++ {
for j := int32(0); j < 8; j++ {
idx := voxels.Index[i<<3+j]
if idx <= 0 {
continue
}
avgJump += idx - i
jumpCount++
}
}
avgJump /= jumpCount
fmt.Println("average jump", avgJump)
}