public void ConstructorToVector4(IPixel packedVector, float[] expectedVector4Components)
{
// Arrange
int precision = 2;
// using float array to work around a bug in xunit corruptint the state of any Vector4 passed as MemberData
Vector4 expectedVector4 = new Vector4(expectedVector4Components[0], expectedVector4Components[1], expectedVector4Components[2], expectedVector4Components[3]);
// Act
Vector4 vector4 = packedVector.ToVector4();
// Assert
Assert.Equal(expectedVector4.X, vector4.X, precision);
Assert.Equal(expectedVector4.Y, vector4.Y, precision);
Assert.Equal(expectedVector4.Z, vector4.Z, precision);
Assert.Equal(expectedVector4.W, vector4.W, precision);
}
public void FromVector4ToVector4(IPixel packedVector, float[] vector4ComponentsToPack)
{
// Arrange
int precision = 2;
Vector4 vector4ToPack = new Vector4(vector4ComponentsToPack[0], vector4ComponentsToPack[1], vector4ComponentsToPack[2], vector4ComponentsToPack[3]);
packedVector.PackFromVector4(vector4ToPack);
// Act
Vector4 vector4 = packedVector.ToVector4();
// Assert
Assert.Equal(vector4ToPack.X, vector4.X, precision);
Assert.Equal(vector4ToPack.Y, vector4.Y, precision);
Assert.Equal(vector4ToPack.Z, vector4.Z, precision);
Assert.Equal(vector4ToPack.W, vector4.W, precision);
}
public static IImageProcessingContext <TPixel> Tint <TPixel>(this IImageProcessingContext <TPixel> source, IPixel color, float amount = 1) where TPixel : struct, IPixel <TPixel>
{
var rgb = color.ToVector4() * amount;
var filter = new Matrix4x4()
{
M11 = 1 - amount,
M22 = 1 - amount,
M33 = 1 - amount,
M41 = rgb.X,
M42 = rgb.Y,
M43 = rgb.Z,
M44 = 1
};
return(source.Filter(filter));
}
public _LerpColorSampler(ITextureSampler <float> source, IPixel odd, IPixel even)
{
_Source = source;
_OddColor = odd.ToVector4();
_EvenColor = even.ToVector4();
}