/// <summary>
/// Scale the NDC rectangle to the dimensions given.
/// </summary>
/// <param name="icrc">Context.</param>
void IRequireTransforms.Transforms(IChartRenderContext icrc)
{
var matx = MatrixSupport.ProjectForQuadrant(4, icrc.SeriesArea);
Rectangle.Transform = new MatrixTransform()
{
Matrix = matx
};
}
/// <summary>
/// The geometry is a circle of radius 10 centered at (0,0).
/// </summary>
/// <param name="area">Projection area.</param>
/// <returns>MP matrix for this component's geometry.</returns>
Matrix IProvideCustomTransform.TransformFor(Rect area)
{
var range = 2.0 * RADIUS;
var mmatx = new Matrix(1.0 / range, 0, 0, -1.0 / range, RADIUS / range, RADIUS / range);
var pmatx = MatrixSupport.ProjectForQuadrant(4, area);
// lock aspect ratio to smallest dimension so it's a circle
var scale = Math.Min(pmatx.M11, pmatx.M22);
pmatx.M11 = pmatx.M22 = scale;
// TODO adjust offset so it's centered
var matx = MatrixSupport.Multiply(mmatx, pmatx);
_trace.Verbose($"{Name} mat:{matx} M:{mmatx} P:{pmatx}");
return(matx);
}
