/// <summary>
/// Sets the terrain splat texture at the passed index to the same
/// information provided in the passed material.
/// </summary>
/// <param name="index">Splat index to apply material to (0 - 3)</param>
/// <param name="splat"></param>
/// <param name="mat">Material to apply</param>
void SetMaterialForSplatIndex(int index, SplatSetting splat, Material mat)
{
//Main Texture
mat.SetTexture("_Splat" + index, splat.Diffuse);
mat.SetTextureScale("_Splat" + index, splat.Tiling);
mat.SetTextureOffset("_Splat" + index, splat.Offset);
//Normal Texture
mat.SetTexture("_Normal" + index, splat.Normal);
mat.SetTextureScale("_Normal" + index, splat.Tiling);
mat.SetTextureOffset("_Normal" + index, splat.Offset);
//Smoothness
mat.SetFloat("_Smoothness" + index, splat.Smoothness);
}
/// <summary>
/// Calculates the weights that can be used to create a splatmap
/// based on the passed sample and splats.
/// </summary>
/// <param name="sample">Sample to base calculation on</param>
/// <param name="splat">Splat setting to base calculation on</param>
/// <returns>Weight values in the same order of the </returns>
float[] CalculateWeights(MeshSampler.MeshSample sample)
{
float height = sample.Height;
float angle = sample.Angle;
float[] weights = new float[SplatSettings.Count];
var orderMap = new Dictionary <PlacementType, int>()
{
{ PlacementType.ElevationRange, 0 },
{ PlacementType.Angle, 1 }
};
List <SplatSetting> ordered = SplatSettings
.OrderBy(s => orderMap[s.PlacementType]) //Order elevation before angle
//.OrderBy(s => s.MinRange) //Order lower ranges
//.OrderBy(s => s.IsMinHeight) //Order min height first
.ToList();
for (int i = 0; i < SplatSettings.Count; i++)
{
SplatSetting splat = ordered[i];
float min = splat.IsMinHeight ? float.MinValue : splat.MinRange;
float max = splat.IsMaxHeight ? float.MaxValue : splat.MaxRange;
switch (splat.PlacementType)
{
case PlacementType.Angle:
if (angle > splat.AngleMin && angle < splat.AngleMax)
{
float factor = Mathf.Clamp01(((angle - splat.AngleMin)) / splat.Blend);
weights[i] = factor;
}
break;
case PlacementType.ElevationRange:
if (height > min && height < max)
{
if (i > 0) //Can blend up
{
float factor = Mathf.Clamp01((splat.Blend - (height - min)) / splat.Blend);
weights[i - 1] = factor;
weights[i] = 1 - factor;
}
else
{
weights[i] = 1f;
}
}
break;
}
}
//Normalize weights
float sum = weights.Sum();
for (var i = 0; i < weights.Length; i++)
{
weights[i] /= sum;
}
return(weights);
}