protected void Max(Heightmap background)
{
for (int i = 0; i < result.Length; i++)
{
result[i] = Mathf.Max(result[i], background[i]);
}
}
protected void Average(Heightmap background, float opacity)
{
for (int i = 0; i < result.Length; i++)
{
result[i] = ((result[i] * opacity) + background[i]) * 0.5f;
}
}
protected void Multiply(Heightmap background, float opacity)
{
for (int i = 0; i < result.Length; i++)
{
result[i] = (result[i] * opacity) * background[i];
}
}
public override void Execute()
{
float height = GetInputValue("height", this.height);
result = new Heightmap();
result.Fill(height);
}
public Heightmap Copy()
{
Heightmap clone = MemberwiseClone() as Heightmap;
clone.matrix = new float[matrix.Length];
matrix.CopyTo(clone.matrix, 0);
return(clone);
}
public override object OnRequestValue(Port port)
{
if (result == null)
{
// Grab an updated input Heightmap, cache, and then run the
// transform method on it and notify listeners once complete.
map = GetInputValue <Heightmap>("map");
if (map != null)
{
result = map.Copy();
Execute();
}
onUpdateResult?.Invoke(result);
}
return(result);
}
public override void Execute()
{
Rect region = GetInputValue("region", this.region);
int octaves = GetInputValue("octaves", this.octaves);
float amplitude = GetInputValue("amplitude", this.amplitude);
float lacunarity = GetInputValue("lacunarity", this.lacunarity);
float invScale = 1f / GetInputValue("scale", scale);
result = new Heightmap();
const float gain = 0.5f;
float ystep = region.height / Heightmap.Size;
float xstep = region.width / Heightmap.Size;
// Algorithm from https://thebookofshaders.com/13/
float ry = region.y;
for (int y = 0; y <= Heightmap.Size; y++, ry += ystep)
{
float rx = region.x;
for (int x = 0; x <= Heightmap.Size; x++, rx += xstep)
{
float fx = rx * invScale;
float fy = ry * invScale;
float height = 0f;
float amp = amplitude;
for (int j = 0; j < octaves; j++)
{
height += amp * Noise(fx, fy);
fx *= lacunarity;
fy *= lacunarity;
amp *= gain;
}
result[x, y] = height;
}
}
}
public override void Execute()
{
Rect region = GetInputValue("region", this.region);
float invScale = 1.0f / GetInputValue("scale", scale);
result = new Heightmap();
float ystep = region.height / Heightmap.Size;
float xstep = region.width / Heightmap.Size;
float ry = region.y;
for (int y = 0; y <= Heightmap.Size; y++, ry += ystep)
{
float rx = region.x;
for (int x = 0; x <= Heightmap.Size; x++, rx += xstep)
{
result[x, y] = Mathf.PerlinNoise(rx * invScale, ry * invScale);
}
}
}
public override void Execute()
{
Heightmap background = GetInputValue("background", this.background);
float opacity = GetInputValue("opacity", this.opacity);
// No output until we have both inputs
if (background == null)
{
result = null;
return;
}
switch (mode)
{
case BlendMode.Add:
Add(background, opacity);
break;
case BlendMode.Multiply:
Multiply(background, opacity);
break;
case BlendMode.Average:
Average(background, opacity);
break;
case BlendMode.Min:
Min(background);
break;
case BlendMode.Max:
Max(background);
break;
case BlendMode.Abs:
Abs();
break;
}
}
public void DirtyResult()
{
result = null;
}