public GradientDemo()
{
//solid brush
_solidBrush = new SolidBrush(Color.Blue);
//1. linear gradient
_linearGrBrush = new LinearGradientBrush(
new PointF(0, 0), new PointF(200, 200),
new ColorStop[]
{
new ColorStop(0.0f, Drawing.Color.Black),
new ColorStop(0.20f, Drawing.Color.Red),
new ColorStop(0.50f, Drawing.KnownColors.OrangeRed),
new ColorStop(0.75f, Drawing.Color.Yellow)
});
//2. circular gradient
_circularGrBrush = new RadialGradientBrush(
new PointF(50, 20), new PointF(300, 20),
new ColorStop[]
{
//for test different colors
new ColorStop(0.0f, Drawing.Color.Yellow),
new ColorStop(0.25f, Drawing.Color.Blue),
new ColorStop(0.50f, Drawing.Color.Green),
new ColorStop(0.75f, Drawing.Color.Yellow),
});
//3. polygon gradient: this version, just a simple rect
//PolygonGradientBrush.ColorVertex2d[] vertices = new PolygonGradientBrush.ColorVertex2d[]
// {
// new PolygonGradientBrush.ColorVertex2d(5,50,KnownColors.OrangeRed),
// new PolygonGradientBrush.ColorVertex2d(50,50,Color.Black),
// new PolygonGradientBrush.ColorVertex2d(50,5,Color.Yellow),
// new PolygonGradientBrush.ColorVertex2d(5,5,Color.Blue),
// };
//PolygonGradientBrush.ColorVertex2d[] vertices = new PolygonGradientBrush.ColorVertex2d[]
//{
// new PolygonGradientBrush.ColorVertex2d(5,300,KnownColors.OrangeRed),
// new PolygonGradientBrush.ColorVertex2d(300,300,Color.Black),
// new PolygonGradientBrush.ColorVertex2d(300,5,Color.Yellow),
// new PolygonGradientBrush.ColorVertex2d(5,5,Color.Blue),
//};
//PolygonGradientBrush.ColorVertex2d[] vertices = new PolygonGradientBrush.ColorVertex2d[]
//{
// new PolygonGradientBrush.ColorVertex2d(5,5,Color.Blue),
// new PolygonGradientBrush.ColorVertex2d(220,5,Color.Yellow),
// new PolygonGradientBrush.ColorVertex2d(220,100,Color.Black),
// new PolygonGradientBrush.ColorVertex2d(5,220,KnownColors.OrangeRed),
//};
PolygonGradientBrush.ColorVertex2d[] vertices = new PolygonGradientBrush.ColorVertex2d[]
{
new PolygonGradientBrush.ColorVertex2d(0, 0, Color.Blue),
new PolygonGradientBrush.ColorVertex2d(300, 0, Color.Yellow),
new PolygonGradientBrush.ColorVertex2d(300, 300, Color.Black),
new PolygonGradientBrush.ColorVertex2d(0, 300, KnownColors.OrangeRed),
};
_polygonGradientBrush = new PolygonGradientBrush(vertices);
using (Tools.BorrowVxs(out var v1, out var v2))
using (Tools.BorrowPathWriter(v1, out PathWriter p))
{
p.MoveTo(0, 0);
p.LineTo(50, 20);
p.LineTo(10, 100);
p.CloseFigure();
AffineMat aff1 = AffineMat.GetScaleMat(2);
_triangleVxs = v1.CreateTrim(aff1);
AffineMat tx = AffineMat.GetTranslateMat(200, 220);
_triangleVxs2 = tx.TransformToVxs(_triangleVxs, v2).CreateTrim();
}
}
public override void Init()
{
//actualImage2 = LoadImage(RootDemoPath.Path + "\\plain01.png");
_memBmp = LoadImage(RootDemoPath.Path + "\\02.jpg");
_mat = AffineMat.GetTranslateMat(50, 50);
}