public override void Update()
{
using (vkvg.Context ctx = new vkvg.Context(vkvgSurf))
{
ctx.SetSource(1, 1, 1);
ctx.Paint();
ctx.LineWidth = 6;
ctx.SetSource(0.1, 0.1, 0.1, 0.8);
ctx.MoveTo(points [0]);
ctx.CurveTo(points [1].X, points [1].Y, points [2].X, points [2].Y, points [3].X, points [3].Y);
ctx.Stroke();
ctx.LineWidth = 1;
ctx.SetSource(0.2, 0.2, 0.2, 1);
ctx.MoveTo(points[0]);
ctx.LineTo(points[1]);
ctx.MoveTo(points[2]);
ctx.LineTo(points[3]);
ctx.Stroke();
ctx.SetSource(0.5, 0.5, 1, 0.9);
for (int i = 0; i < points.Length; i++)
{
if (i == curPoint)
{
continue;
}
ctx.Arc(points[i].X, points [i].Y, cpRadius, 0, Math.PI * 2.0);
}
ctx.FillPreserve();
ctx.Stroke();
if (curPoint < 0)
{
return;
}
ctx.SetSource(1, 0.4, 0.4, 0.9);
ctx.Arc(points [curPoint].X, points [curPoint].Y, selRadius, 0, Math.PI * 2.0);
ctx.FillPreserve();
ctx.Stroke();
}
}
static void DrawRoundedRectangle(vkvg.Context gr, double x, double y, double width, double height, double radius)
{
if ((radius > height / 2) || (radius > width / 2))
{
radius = Math.Min(height / 2, width / 2);
}
gr.MoveTo(x, y + radius);
gr.Arc(x + radius, y + radius, radius, Math.PI, -Math.PI / 2);
gr.LineTo(x + width - radius, y);
gr.Arc(x + width - radius, y + radius, radius, -Math.PI / 2, 0);
gr.LineTo(x + width, y + height - radius);
gr.Arc(x + width - radius, y + height - radius, radius, 0, Math.PI / 2);
gr.LineTo(x + radius, y + height);
gr.Arc(x + radius, y + height - radius, radius, Math.PI / 2, Math.PI);
gr.ClosePath();
}
void vkvgDraw()
{
using (vkvg.Context ctx = new vkvg.Context(vkvgSurf)) {
ctx.SetSource(1.0, 1.0, 1.0);
ctx.Paint();
ctx.Translate(100, 100);
ctx.Scale(3, 3);
ctx.SetSource(0.1, 0.1, 0.1);
ctx.Arc(100, 100, 10.0, 0, Math.PI * 2.0);
ctx.LineWidth = 1.0;
ctx.Stroke();
}
}
public override void Update()
{
using (vkvg.Context ctx = new vkvg.Context(vkvgSurf))
{
ctx.Clear();
for (int i = 0; i < iterations; i++)
{
float x = (float)(rnd.NextDouble() * Width);
float y = (float)(rnd.NextDouble() * Height);
float r = 0.2f * (float)(rnd.NextDouble() * Width) + 1.0f;
randomize_color(ctx);
ctx.Arc(x, y, r, 0, 2.0f * Math.PI);
ctx.Fill();
if (i % 50 == 0)
{
ctx.Flush();
}
}
}
}