public float sampleTrilinear(Array3D <float> noise, Vector3 pos)
{
var min = pos.ToFloored();
var f = pos - min;
/*var q000 = noise.GetTiled(new Point3(0, 0, 0) + min);
* var q100 = noise.GetTiled(new Point3(1, 0, 0) + min);
* var q010 = noise.GetTiled(new Point3(0, 1, 0) + min);
* var q001 = noise.GetTiled(new Point3(0, 0, 1) + min);
* var q110 = noise.GetTiled(new Point3(1, 1, 0) + min);
* var q011 = noise.GetTiled(new Point3(0, 1, 1) + min);
* var q101 = noise.GetTiled(new Point3(1, 0, 1) + min);
* var q111 = noise.GetTiled(new Point3(1, 1, 1) + min);*/
var x0 = TWMath.nfmod(min.X + 0, noise.Size.X);;
var y0 = TWMath.nfmod(min.Y + 0, noise.Size.Y);
var z0 = TWMath.nfmod(min.Z + 0, noise.Size.Z);
var x1 = TWMath.nfmod(x0 + 1, noise.Size.X);
var y1 = TWMath.nfmod(y0 + 1, noise.Size.Y);
var z1 = TWMath.nfmod(z0 + 1, noise.Size.Z);
var q000 = noise.GetFast(x0, y0, z0);
var q100 = noise.GetFast(x1, y0, z0);
var q010 = noise.GetFast(x0, y1, z0);
var q001 = noise.GetFast(x0, y0, z1);
var q110 = noise.GetFast(x1, y1, z0);
var q011 = noise.GetFast(x0, y1, z1);
var q101 = noise.GetFast(x1, y0, z1);
var q111 = noise.GetFast(x1, y1, z1);
var ret = TWMath.triLerp(f.dx(), q000, q100, q001, q101, q010, q110, q011, q111);
return(ret);
}
public void TestDensityCalcPerformance()
{
var dens = VoxelTerrainGenerationTest.createDensityFunction5Perlin(11, 10);
var times = 10000;
var s = new Stopwatch();
s.Start();
for (int i = 0; i < times; i++)
{
float a = dens(new Vector3(1));
}
s.Stop();
var densityEval = s.Elapsed.TotalSeconds / times;
Console.WriteLine("Density evaluation: 100% - {0} ms", +densityEval * 1000);
s.Reset();
s.Start();
for (int i = 0; i < times * 5; i++)// 5 trilerps per density lookup
{
float a = TWMath.triLerp(new Vector3(0.5f), 4, 7, 8, 6, 4, 8, 9, 7);
}
s.Stop();
var trilerp = s.Elapsed.TotalSeconds / times;
Console.WriteLine("Trilerp : {0:###}% - {1}ms", trilerp / densityEval * 100, trilerp * 1000);
var ar = new Array3D <float>(new Point3(16, 16, 16));
s.Reset();
s.Start();
for (int i = 0; i < times * 5 * 8; i++)// 8 getTiled per trilerp and 5 trilerps per density lookup
{
/*var pos = new Point3(5, 5, 5);
* pos.X = TWMath.nfmod(pos.X, ar.Size.X);
* pos.Y = TWMath.nfmod(pos.Y, ar.Size.Y);
* pos.Z = TWMath.nfmod(pos.Z, ar.Size.Z);
* float a = ar.arr[pos.X, pos.Y, pos.Z];*/
float a = ar.GetTiled(new Point3(5, 5, 5));
}
s.Stop();
var getTiled = s.Elapsed.TotalSeconds / times;
Console.WriteLine("GetTiled : {0:###}% - {1}ms", getTiled / densityEval * 100, getTiled * 1000);
}
