/// <summary>
/// Renders the voronoi diagram.
/// </summary>
public void Render(Graphics g, ScreenTrans zoom, RenderParameter renderColors)
{
this.renderColors = renderColors;
var points = data.VoronoiPoints;
var edges = data.VoronoiEdges;
if (points != null && edges != null)
{
uint k;
PointF p0, p1;
int n = edges.Length / 2;
for (int i = 0; i < n; i++)
{
// First endpoint of voronoi edge
k = edges[2 * i];
p0 = new PointF(points[2 * k], points[2 * k + 1]);
// Second endpoint of voronoi edge
k = edges[2 * i + 1];
p1 = new PointF(points[2 * k], points[2 * k + 1]);
// Render the edge
if (zoom.ViewportContains(p0.X, p0.Y) ||
zoom.ViewportContains(p1.X, p1.Y))
{
p0 = zoom.WorldToScreen(p0.X, p0.Y);
p1 = zoom.WorldToScreen(p1.X, p1.Y);
g.DrawLine(renderColors.VoronoiLine, p0, p1);
}
}
}
}
private void RenderPoints(Graphics g)
{
int i, k, n;
PointF pt;
float[] pts = data.Points;
// Draw input points
n = data.NumberOfInputPoints;
for (i = 0; i < n; i++)
{
k = 2 * i;
if (ignoreBounds || zoom.ViewportContains(pts[k], pts[k + 1]))
{
pt = zoom.WorldToScreen(pts[k], pts[k + 1]);
g.FillEllipse(renderColors.Point, pt.X - 1.5f, pt.Y - 1.5f, 3, 3);
}
}
// Draw Steiner points
n = pts.Length / 2;
for (; i < n; i++)
{
k = 2 * i;
if (ignoreBounds || zoom.ViewportContains(pts[k], pts[k + 1]))
{
pt = zoom.WorldToScreen(pts[k], pts[k + 1]);
g.FillEllipse(renderColors.SteinerPoint, pt.X - 1.5f, pt.Y - 1.5f, 3, 3);
}
}
}