Vector2 RandomVariation(Rand hash, Vector2 reference, float fraction)
{
float variationMin = reference.x * fraction;
float variationMax = reference.y * fraction;
return new Vector2 (
hash.Range (reference.x - variationMin, reference.x + variationMin),
hash.Range (reference.y - variationMax, reference.y + variationMax)
);
}
float RandomVariation(Rand hash, float reference, float fraction)
{
float variation = reference * fraction;
return hash.Range (reference - variation, reference + variation);
}
void RandomizeTrees(Rand hash, bool newTheme = true)
{
generator.initialLength = RandomVariation (hash, referenceGenerator.initialLength, 0.3f);
generator.initialWidth = RandomVariation (hash, referenceGenerator.initialWidth, 0.7f);
generator.smallBranchBias = RandomVariation (hash, referenceGenerator.smallBranchBias, 1.0f);
generator.turn1 = RandomVariation (hash, referenceGenerator.turn1, 1.3f);
generator.turn2 = RandomVariation (hash, referenceGenerator.turn2, 1.3f);
generator.turn3 = RandomVariation (hash, referenceGenerator.turn3, 1.3f);
generator.roll1 = RandomVariation (hash, referenceGenerator.roll1, 1.3f);
generator.roll2 = RandomVariation (hash, referenceGenerator.roll2, 1.3f);
generator.roll3 = RandomVariation (hash, referenceGenerator.roll3, 1.3f);
generator.lengthScale1 = RandomVariation (hash, referenceGenerator.lengthScale1, 0.3f);
generator.lengthScale2 = RandomVariation (hash, referenceGenerator.lengthScale2, 0.3f);
generator.lengthScale3 = RandomVariation (hash, referenceGenerator.lengthScale3, 0.3f);
generator.lengthScale1 = Clamp (generator.lengthScale1, 0.05f, 0.95f);
generator.lengthScale2 = Clamp (generator.lengthScale2, 0.05f, 0.95f);
generator.lengthScale3 = Clamp (generator.lengthScale3, 0.05f, 0.95f);
generator.e = RandomVariation (hash, referenceGenerator.e, 0.2f);
generator.branchNo = referenceGenerator.branchNo;
generator.iter = hash.Range (9, 10+1);
if (newTheme)
generator.showLeaves = (hash.value < 0.85f);
generator.leafMid = RandomVariation (hash, referenceGenerator.leafMid, 0.9f);
generator.leafRotate = RandomVariation (hash, referenceGenerator.leafRotate, 0.5f);
generator.gravity = RandomVariation (hash, referenceGenerator.gravity, 1.5f);
}
void RandomizePlacement(Rand hash, bool newTheme = true)
{
placementSeed = hash.Next () % 1000;
if (newTheme)
baseDist = hash.Range (0.50f, 0.75f);
noiseSize1 = RandomVariation (hash, referenceParameters.noiseSize1, 0.3f);
noiseSize2 = RandomVariation (hash, referenceParameters.noiseSize2, 0.5f);
threshold = RandomVariation (hash, referenceParameters.threshold, 0.15f);
randomness = RandomVariation (hash, referenceParameters.randomness, 0.5f);
scaleBase = RandomVariation (hash, referenceParameters.scaleBase, 0.3f);
}
List<Color> GetPrimaryColors(Color baseColor, Rand hash)
{
List<Color> colors = new List<Color> ();
colors.Add (baseColor);
Vector4 hsv = ColorUtility.RGBToHSV (baseColor);
int selector = hash.Range (0, 2);
if (selector == 0) {
hsv.x += 0.49f;
colors.Add (ColorUtility.HSVToRGB (hsv));
}
else if (selector == 1) {
hsv.x += 1/3f;
colors.Add (ColorUtility.HSVToRGB (hsv));
hsv.x += 1/3f;
colors.Add (ColorUtility.HSVToRGB (hsv));
}
return colors;
}
void AddVariationColors(List<Color> colors, Rand rand)
{
int index = rand.Range (0, colors.Count);
float t = rand.Range (0.3f, 0.7f);
Color newColor = LerpColorInHSV (
colors[index],
colors[(index + 1) % colors.Count],
t
);
colors.Add (newColor);
}