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 TestBufferData(t *testing.T) {
buf := newBuffer(16 * 4)
defer buf.Delete()
gl.BufferData(gl.ARRAY_BUFFER, 16*4, &array, gl.STATIC_READ)
if gl.GetError() != gl.NO_ERROR {
t.Error("pointer to array failed")
}
gl.BufferData(gl.ARRAY_BUFFER, 16*4, slice, gl.STATIC_READ)
if gl.GetError() != gl.NO_ERROR {
t.Error("slice failed")
}
gl.BufferData(gl.ARRAY_BUFFER, 16*4, nil, gl.STATIC_READ)
if gl.GetError() != gl.NO_ERROR {
t.Error("nil pointer failed")
}
}
func newBuffer(bytes int) gl.Buffer {
buf := gl.GenBuffer()
buf.Bind(gl.ARRAY_BUFFER)
gl.BufferData(gl.ARRAY_BUFFER, bytes, slice, gl.STATIC_READ)
return buf
}