public static Texture2D GeneratedSimplexTexture(Terrain terrain, HeightLayerProperties properties)
{
Texture2D _working;
int _resolution;
//_sizeX = _terrain.terrainData.heightmapWidth;
//_sizeY = _terrain.terrainData.heightmapHeight;
_resolution = terrain.terrainData.heightmapResolution;
_working = new Texture2D(_resolution, _resolution, TextureFormat.R16, true);
_working.name = "Heightmap Noise Texture";
_working.wrapMode = TextureWrapMode.Clamp;
FillTextureWithNoise(_resolution, _working, properties);
return(_working);
}
private static void FillTextureWithNoise(int resolution, Texture2D inputTexture, HeightLayerProperties properties)
{
int _resolution = resolution;
float _stepSize = 1f / _resolution;
Vector3 point00 = new Vector3(-0.5f, -0.5f) + properties.Offset.Value;
Vector3 point10 = new Vector3(0.5f, -0.5f) + properties.Offset.Value;
Vector3 point01 = new Vector3(-0.5f, 0.5f) + properties.Offset.Value;
Vector3 point11 = new Vector3(0.5f, 0.5f) + properties.Offset.Value;
Vector3 _texturePoint = new Vector2();
float _noiseSample;
for (int y = 0; y < _resolution; y++)
{
Vector3 point0 = Vector3.Lerp(point00, point01, (y + 0.5f) * _stepSize);
Vector3 point1 = Vector3.Lerp(point10, point11, (y + 0.5f) * _stepSize);
for (int x = 0; x < _resolution; x++)
{
Vector3 point = Vector3.Lerp(point0, point1, (x + 0.5f) * _stepSize);
_noiseSample = SimplexNoise.SampleSum(point,
properties.Frequency.Value,
properties.Amplitude.Value,
properties.Octaves.Value,
properties.Lacunarity.Value,
properties.Persistance.Value);
_noiseSample = _noiseSample * 0.5f + 0.5f;
Color _noiseColor = Color.white * _noiseSample;
inputTexture.SetPixel(x, y, _noiseColor);
}
}
inputTexture.Apply();
}
public HeightLayer(int _position)
{
Name = string.Format("Height Layer {0}", _position);
Position = _position;
LayerProperties = new HeightLayerProperties();
}
