void DrawScene(DrawingContext dc) {
dc.Rect(Color.FromArgb(0, 0, 0, 0), 0, 0, 500, 500);
dc.Ellipse(Colors.Red, 250, 250, 20, 20);
for (int i = 0; i < 5; ++i) {
dc.PushTransform(new RotateTransform(36*i, 250, 250));
dc.Ellipse(Colors.Gray, 3, 250, 250, 40, 150);
dc.Ellipse(Colors.Black,
250 + 40*Math.Cos(angle[i]*0.05),
250 + 150*Math.Sin(angle[i]*0.05),
8, 8);
dc.Pop();
}
}
void DrawScene(DrawingContext dc) {
dc.Rect(Color.FromArgb(255, 0, 0, 30), 0, 0, 500, 500);
// sun
dc.Ellipse(Colors.Yellow, 250, 250, 30, 30);
Planet(dc);
Stars(dc);
}
void DrawSun(DrawingContext dc) {
dc.Ellipse(Colors.Yellow, sunX, 50, 40, 40);
}
void DrawBall(DrawingContext dc) {
dc.Ellipse(Colors.Black, ballX, ballY, ballSize, ballSize);
}
void DrawBall(DrawingContext dc)
{
dc.Ellipse(Colors.Black, x, y, 10, 10);
dc.Ellipse(Colors.Black, a, y + 50, 10, 10);
}
void Stars(DrawingContext dc) {
var r = new Random(99);
for (int i = 0; i < 50; ++i) {
dc.Ellipse(Colors.White, r.Next(0, 501), r.Next(0, 501), 1, 1);
}
}
void Planet(DrawingContext dc) {
dc.Ellipse(Colors.Red,
250 + 100*Math.Cos(angle1*0.05),
250 + 100*Math.Sin(angle1*0.05),
10, 10);
}
