/// <summary>
/// Ridged multifractal value. Range 0.0 : 1.0
/// </summary>
/// <param name="pos"></param>
/// <param name="opts"></param>
/// <returns></returns>
public float Ridged(Vector3 pos, NoiseOptions opts)
{
//Setup
double total = 0.0f;
float amplitude = 0.5f;
double previous = 1.0f;
float freq = opts.frequency;
//FastRandom rng = new FastRandom (opts.seed);
//Value is between -1 an 1
for (int i = 0; i < opts.octaves; i++)
{
//int sx = rng.Next(-10000, 10000);
//int sy = rng.Next(-10000, 10000);
//int sz = rng.Next(-10000, 10000);
double value = Noise(
(pos.x + opts.offset.x) * freq - opts.seed,
(pos.y + opts.offset.y) * freq - opts.seed,
(pos.z + opts.offset.z) * freq - opts.seed
);
total += Ridge(value) * amplitude * previous;
previous = value;
freq *= opts.lacunarity;
amplitude *= opts.persistence;
}
//Return the processed value
return((float)total);
}
/// <summary>
/// FBM Sum value, Range -1.0 : 1.0
/// </summary>
/// <param name="pos"></param>
/// <param name="opts"></param>
/// <returns></returns>
public float Sum(Vector3 pos, NoiseOptions opts)
{
//Setup
double total = 0.0f;
float maxAmplitude = 0.0f;
float amplitude = 1.0f;
float frequency = opts.frequency;
float persistence = opts.persistence;
//FastRandom rng = new FastRandom (opts.seed);
//Value is between -1 an 1
for (int i = 0; i < opts.octaves; i++)
{
//int sx = rng.Next(-10000, 10000);
//int sy = rng.Next(-10000, 10000);
//int sz = rng.Next(-10000, 10000);
total += Noise(
(pos.x + opts.offset.x) * frequency - opts.seed,
(pos.y + opts.offset.y) * frequency - opts.seed,
(pos.z + opts.offset.z) * frequency - opts.seed
) * amplitude;
frequency *= opts.lacunarity;
maxAmplitude += amplitude;
amplitude *= persistence;
}
float noise = ((float)total) / maxAmplitude;
//Return the processed value
return(noise);
}
public NoiseOptions(NoiseOptions other)
{
this.octaves = other.octaves;
this.persistence = other.persistence;
this.frequency = other.frequency;
this.lacunarity = other.lacunarity;
this.offset = other.offset;
}
private void FillTexture(Texture2D t, Face face, NoiseOptions opts, float discrete = -1000)
{
float w = t.width - 1;
float h = t.height - 1;
Perlin perl = new Perlin();
for (int i = 0; i <= w; i++)
{
for (int j = 0; j <= h; j++)
{
float xp = 0, yp = 0, zp = 0;
switch (face)
{
case Face.Top:
yp = 1;
xp = (i / w) * 2 - 1;
zp = 1 - (j / h) * 2;
break;
case Face.Bottom:
yp = -1;
xp = (i / w) * 2 - 1;
zp = (j / h) * 2 - 1;
break;
case Face.Left:
xp = -1;
zp = 1 - (i / w) * 2;
yp = 1 - (j / h) * 2;
break;
case Face.Back:
zp = -1;
xp = (i / w) * 2 - 1;
yp = 1 - (j / h) * 2;
break;
case Face.Right:
xp = 1;
zp = (i / w) * 2 - 1;
yp = 1 - (j / h) * 2;
break;
case Face.Front:
zp = 1;
xp = 1 - (i / w) * 2;
yp = 1 - (j / h) * 2;
break;
}
Vector3 pos = IMeshService.Spherify(new Vector3(xp, yp, zp));
float n = perl.Sum(pos, opts);
t.SetPixel(i, j, (discrete <= 1 && discrete >= -1) ? (n < discrete ? a : b) : Color.Lerp(a, b, (n + 1) * 0.5f));
}
}
}
public void Draw(NoiseOptions opts, float discrete = -1000)
{
//Ensure textures exist
TestExistance();
//Generate Textures
FillTexture(top, Face.Top, opts, discrete);
FillTexture(bottom, Face.Bottom, opts, discrete);
FillTexture(left, Face.Left, opts, discrete);
FillTexture(right, Face.Right, opts, discrete);
FillTexture(front, Face.Front, opts, discrete);
FillTexture(back, Face.Back, opts, discrete);
//Apply textures
top.Apply();
bottom.Apply();
left.Apply();
right.Apply();
front.Apply();
back.Apply();
//Draw Textures
GUILayout.BeginVertical();
GUILayout.Label(top);
GUILayout.BeginHorizontal();
GUILayout.Label(back);
GUILayout.Label(right);
GUILayout.Label(front);
GUILayout.Label(left);
GUILayout.EndHorizontal();
GUILayout.Label(bottom);
GUILayout.EndVertical();
}
