func (fa *MazeArena) Block(bc coords.Block) mapgen.Block {
if bc.X >= 32 || bc.X < -32 ||
bc.Z >= 128 || bc.Z < -128 ||
bc.Y < 16 {
return mapgen.BLOCK_DIRT
}
val := noise.Perlin(float64(bc.X)/16, float64(bc.Z)/16, fa.seed)
isWall := val-math.Floor(val) < 0.05
if bc.Y == 21 && isWall {
return mapgen.BLOCK_SPAWN
}
if bc.Y < 20 && isWall {
return mapgen.BLOCK_STONE
}
return mapgen.BLOCK_AIR
}
func (pa *PerlinArena) heightAt(x, z float64) float64 {
quality := 2.0
height := 0.0
for i := 0; i < 4; i++ {
height += noise.Perlin(x/quality, z/quality, pa.seed) * quality
quality *= 4
}
pow := math.Pow
max := math.Max
abs := math.Abs
mult := 0.1 * pow(1.05,
max(abs(x)-32, 0)+
max(abs(z)-128, 0))
height = height*mult + float64(coords.ChunkHeight)/2
return height
}