Esempio n. 1
0
package terrain

import "sync"
import "github.com/larspensjo/Go-simplex-noise/simplexnoise"
import "github.com/CasualSuperman/dfc/items"

const chunk_horiz_dim = 64
const chunk_vert_dim = 128

type chunk struct {
	// Temperature is at a slightly lower res than discrete tiles are.
	temperature [chunk_horiz_dim / 4][chunk_horiz_dim / 4][chunk_vert_dim / 4]items.Temperature

	fluids    [chunk_horiz_dim][chunk_horiz_dim][chunk_vert_dim]Fluid
	tickCount uint8
}

type Chunk interface {
	Tick(*sync.WaitGroup)
}

var _ = simplexnoise.Noise1(0)
Esempio n. 2
0
func DoTestSimplexNoise() {
	var min, max float64

	min, max = 1, -1
	const iter = 1e7
	var sum float64
	for i := 0; i < iter; i++ {
		switch rnd := simplexnoise.Noise1(float64(i) * 1.827231321); {
		case rnd < min:
			min = rnd
			sum += rnd
		case rnd > max:
			max = rnd
			sum += rnd
		default:
			sum += rnd
		}
	}
	// fmt.Printf("DoTestSimplexNoise simplexnoise.Noise1 min %v, max %v, average %v\n", min, max, sum/iter)
	DoTestCheck("DoTestSimplexNoise simplexnoise.Noise1 min=-1.0", math.Abs(min+1) < 1e-3)
	DoTestCheck("DoTestSimplexNoise simplexnoise.Noise1 max=1.0", math.Abs(max-1) < 1e-3)
	DoTestCheck("DoTestSimplexNoise simplexnoise.Noise1 average=0.0", math.Abs(sum/iter) < 0.04) // Not very good, off by more than 3%

	min, max = 1, -1
	sum = 0
	for i := 0; i < iter; i++ {
		switch rnd := simplexnoise.Noise2(float64(i)*1.827411321, float64(i)*7.12312781); {
		case rnd < min:
			min = rnd
			sum += rnd
		case rnd > max:
			max = rnd
			sum += rnd
		default:
			sum += rnd
		}
	}
	// fmt.Printf("DoTestSimplexNoise simplexnoise.Noise2 min %v, max %v, average %v\n", min, max, sum/iter)
	DoTestCheck("DoTestSimplexNoise simplexnoise.Noise2 min=-1.0", math.Abs(min+1) < 1e-3)
	DoTestCheck("DoTestSimplexNoise simplexnoise.Noise2 max=1.0", math.Abs(max-1) < 1e-3)
	DoTestCheck("DoTestSimplexNoise simplexnoise.Noise2 average=0.0", math.Abs(sum/iter) < 1e-4)

	min, max = 1, -1
	sum = 0
	for i := 0; i < iter; i++ {
		switch rnd := simplexnoise.Noise3(float64(i)*1.827131321, float64(i)*7.12372381, float64(i)*4.923716223); {
		case rnd < min:
			min = rnd
			sum += rnd
		case rnd > max:
			max = rnd
			sum += rnd
		default:
			sum += rnd
		}
	}
	// fmt.Printf("DoTestSimplexNoise simplexnoise.Noise3 min %v, max %v, average %v\n", min, max, sum/iter)
	DoTestCheck("DoTestSimplexNoise simplexnoise.Noise3 min=-1.0", math.Abs(min+1) < 1e-3)
	DoTestCheck("DoTestSimplexNoise simplexnoise.Noise3 max=1.0", math.Abs(max-1) < 1e-3)
	DoTestCheck("DoTestSimplexNoise simplexnoise.Noise3 average=0.0", math.Abs(sum/iter) < 1e-4)
}