func (self *ArrayVoxelField) AddValue(from, to v.Vector3i, eval VoxelFunc) {
from.SubIP(v.Vector3i{self.translateX, self.translateY, self.translateZ})
to.SubIP(v.Vector3i{self.translateX, self.translateY, self.translateZ})
for z := from.Z; z < to.Z; z++ {
for y := from.Y; y < to.Y; y++ {
for x := from.X; x < to.X; x++ {
if x < 0 || y < 0 || z < 0 ||
x >= self.sizeX || y >= self.sizeY || z >= self.sizeZ {
continue
}
id := x + y*self.sizeX + z*self.sizeX*self.sizeY
v := int(self.data[id]) + eval(x+self.translateX, y+self.translateY, z+self.translateZ)
if v < 0 {
v = 0
} else if v > 255 {
v = 255
}
self.data[id] = byte(v)
}
}
}
}
