func MarchingCubes(volume Volume, extents math3d.Vector, cubeSize float32) *render.Mesh {
defer util.EndTiming(util.StartTiming("MarchingCubes(%v, %v, %v)", volume, extents, cubeSize))
var verticies []math3d.Vector
var x, y, z float32
if cubeSize <= 0 {
panic("Cube size was 0 or negative!")
}
// FIXME, seed at the start of the game
r := rand.New(rand.NewSource(100))
finalMesh := new(render.Mesh)
for x = 0; x < extents.X; x += cubeSize {
for y = 0; y < extents.Y; y += cubeSize {
for z = 0; z < extents.Z; z += cubeSize {
verticies = marchCube(volume, x, y, z, cubeSize)
for _, vertex := range verticies {
finalMesh.VertexList = append(finalMesh.VertexList, vertex.X)
finalMesh.VertexList = append(finalMesh.VertexList, vertex.Y)
finalMesh.VertexList = append(finalMesh.VertexList, vertex.Z)
finalMesh.ColorList = append(finalMesh.ColorList, r.Float32())
finalMesh.ColorList = append(finalMesh.ColorList, r.Float32())
finalMesh.ColorList = append(finalMesh.ColorList, r.Float32())
}
}
}
}
return finalMesh
}
