private static void ApplyParentTransform(SpriterSpatialInfo child, SpriterSpatialInfo parent)
{
float px = parent.ScaleX * child.X;
float py = parent.ScaleY * child.Y;
double angleRad = parent.Angle * Math.PI / 180;
float s = (float)Math.Sin(angleRad);
float c = (float)Math.Cos(angleRad);
child.X = px * c - py * s + parent.X;
child.Y = px * s + py * c + parent.Y;
child.ScaleX *= parent.ScaleX;
child.ScaleY *= parent.ScaleY;
child.Angle = parent.Angle + Math.Sign(parent.ScaleX * parent.ScaleY) * child.Angle;
child.Angle %= 360.0f;
}
private static SpriterSpatialInfo Interpolate(SpriterSpatialInfo a, SpriterSpatialInfo b, float f, int spin)
{
return new SpriterSpatialInfo
{
Angle = AngleLinear(a.Angle, b.Angle, spin, f),
X = Linear(a.X, b.X, f),
Y = Linear(a.Y, b.Y, f),
ScaleX = Linear(a.ScaleX, b.ScaleX, f),
ScaleY = Linear(a.ScaleY, b.ScaleY, f)
};
}
private static void FillFrom(SpriterSpatialInfo target, SpriterSpatialInfo source)
{
target.Alpha = source.Alpha;
target.Angle = source.Angle;
target.ScaleX = source.ScaleX;
target.ScaleY = source.ScaleY;
target.X = source.X;
target.Y = source.Y;
}
private static SpriterSpatialInfo Copy(SpriterSpatialInfo info)
{
SpriterSpatialInfo copy = new SpriterSpatialInfo();
FillFrom(copy, info);
return copy;
}