void CreatePerlinGradientTexture(byte[] permutations)
{
Vector4nsb[] gradients = new Vector4nsb[] {
new Vector4nsb(1, 1, 0, 0), new Vector4nsb(-1, 1, 0, 0), new Vector4nsb(1, -1, 0, 0), new Vector4nsb(-1, -1, 0, 0),
new Vector4nsb(1, 0, 1, 0), new Vector4nsb(-1, 0, 1, 0), new Vector4nsb(1, 0, -1, 0), new Vector4nsb(-1, 0, -1, 0),
new Vector4nsb(0, 1, 1, 0), new Vector4nsb(0, -1, 1, 0), new Vector4nsb(0, 1, -1, 0), new Vector4nsb(0, -1, -1, 0),
new Vector4nsb(1, 1, 0, 0), new Vector4nsb(0, -1, 1, 0), new Vector4nsb(-1, 1, 0, 0), new Vector4nsb(0, -1, -1, 0)
};
Vector4nsb[] data = new Vector4nsb[256];
#if false
new NormalizedColor(0, -1, -1, -1),
new NormalizedColor(0, -1, -1, 1),
new NormalizedColor(0, -1, 1, -1),
new NormalizedColor(0, -1, 1, 1),
new NormalizedColor(0, 1, -1, -1),
new NormalizedColor(0, 1, -1, 1),
new NormalizedColor(0, 1, 1, -1),
new NormalizedColor(0, 1, 1, 1),
new NormalizedColor(-1, -1, 0, -1),
new NormalizedColor(-1, 1, 0, -1),
new NormalizedColor(1, -1, 0, -1),
new NormalizedColor(1, 1, 0, -1),
new NormalizedColor(-1, -1, 0, 1),
new NormalizedColor(-1, 1, 0, 1),
new NormalizedColor(1, -1, 0, 1),
new NormalizedColor(1, 1, 0, 1),
new NormalizedColor(-1, 0, -1, -1),
new NormalizedColor(1, 0, -1, -1),
new NormalizedColor(-1, 0, -1, 1),
new NormalizedColor(1, 0, -1, 1),
new NormalizedColor(-1, 0, 1, -1),
new NormalizedColor(1, 0, 1, -1),
new NormalizedColor(-1, 0, 1, 1),
new NormalizedColor(1, 0, 1, 1),
new NormalizedColor(0, -1, -1, 0),
new NormalizedColor(0, -1, -1, 0),
new NormalizedColor(0, -1, 1, 0),
new NormalizedColor(0, -1, 1, 0),
new NormalizedColor(0, 1, -1, 0),
new NormalizedColor(0, 1, -1, 0),
new NormalizedColor(0, 1, 1, 0),
new NormalizedColor(0, 1, 1, 0),
#endif
for (int i = 0; i < 256; i++)
{
data[i] = gradients[permutations[i] % gradients.Length];
}
var texture = new Texture2D();
texture.Data(data.Length, 1, Formats.Vector4nsb, data);
Program.Uniforms["PerlinGradientTexture"].Set(texture);
}
/// <summary>Read a <see cref="Vector4nsb"/>.</summary>
public static void ReadVector4nsb(this BinaryReader reader , out Vector4nsb result)
{
result.X = reader.ReadNormalizedSByte();
result.Y = reader.ReadNormalizedSByte();
result.Z = reader.ReadNormalizedSByte();
result.W = reader.ReadNormalizedSByte();
return;
}
/// <summary>Read an array of <c>Vector4nsb</c> values.</summary>
public static Vector4nsb[] ReadArrayVector4nsb(this BinaryReader reader, int count)
{
Vector4nsb[] array = new Vector4nsb[count]; reader.ReadArray(array, 0, count); return array;
}
void CreatePerlinGradientTexture(byte[] permutations)
{
Vector4nsb[] gradients = new Vector4nsb[] {
new Vector4nsb(1, 1, 0, 0), new Vector4nsb(-1, 1, 0, 0), new Vector4nsb(1, -1, 0, 0), new Vector4nsb(-1, -1, 0, 0),
new Vector4nsb(1, 0, 1, 0), new Vector4nsb(-1, 0, 1, 0), new Vector4nsb(1, 0, -1, 0), new Vector4nsb(-1, 0, -1, 0),
new Vector4nsb(0, 1, 1, 0), new Vector4nsb(0, -1, 1, 0), new Vector4nsb(0, 1, -1, 0), new Vector4nsb(0, -1, -1, 0),
new Vector4nsb(1, 1, 0, 0), new Vector4nsb(0, -1, 1, 0), new Vector4nsb(-1, 1, 0, 0), new Vector4nsb(0, -1, -1, 0)
};
Vector4nsb[] data = new Vector4nsb[256];
#if false
new NormalizedColor(0, -1, -1, -1),
new NormalizedColor(0, -1, -1, 1),
new NormalizedColor(0, -1, 1, -1),
new NormalizedColor(0, -1, 1, 1),
new NormalizedColor(0, 1, -1, -1),
new NormalizedColor(0, 1, -1, 1),
new NormalizedColor(0, 1, 1, -1),
new NormalizedColor(0, 1, 1, 1),
new NormalizedColor(-1, -1, 0, -1),
new NormalizedColor(-1, 1, 0, -1),
new NormalizedColor(1, -1, 0, -1),
new NormalizedColor(1, 1, 0, -1),
new NormalizedColor(-1, -1, 0, 1),
new NormalizedColor(-1, 1, 0, 1),
new NormalizedColor(1, -1, 0, 1),
new NormalizedColor(1, 1, 0, 1),
new NormalizedColor(-1, 0, -1, -1),
new NormalizedColor(1, 0, -1, -1),
new NormalizedColor(-1, 0, -1, 1),
new NormalizedColor(1, 0, -1, 1),
new NormalizedColor(-1, 0, 1, -1),
new NormalizedColor(1, 0, 1, -1),
new NormalizedColor(-1, 0, 1, 1),
new NormalizedColor(1, 0, 1, 1),
new NormalizedColor(0, -1, -1, 0),
new NormalizedColor(0, -1, -1, 0),
new NormalizedColor(0, -1, 1, 0),
new NormalizedColor(0, -1, 1, 0),
new NormalizedColor(0, 1, -1, 0),
new NormalizedColor(0, 1, -1, 0),
new NormalizedColor(0, 1, 1, 0),
new NormalizedColor(0, 1, 1, 0),
#endif
for (int i = 0; i < 256; i++)
data[i] = gradients[permutations[i] % gradients.Length];
var texture = new Texture2D();
texture.Data(data.Length, 1, Formats.Vector4nsb, data);
Program.Uniforms["PerlinGradientTexture"].Set(texture);
}
