internal static SizeF ProjectionVector(SizeF project, SizeF ontoDirection)
{
// calculates the projection of the first parameter in the direction given by the second parameter as a vector
// i.e. the vector would be in direction szOntoDirection, and the magnitude is the projection of szProject in this direction
float multiply = project.DotProduct(ontoDirection) / ontoDirection.DotProduct(ontoDirection);
// this is actually ProjectionScalar (szProject, szOnto)/Scalar (szOnto) - but it is faster written this way
return(ontoDirection.MultiplyBy(multiply));
}
internal static float ProjectionScalar(SizeF project, SizeF ontoDirection)
{
// calculates the projection of the first parameter in the direction given by the second parameter. (i.e. length of first parameter in the direction of the second)
//The length of the second parameter does not affect the result
return(project.DotProduct(ontoDirection) / ontoDirection.Length());
}