public static void DrawSquare(double x, double y, double dimension, Color color)
{
double halfDimension = dimension / 2;
GLUtil.SetColor(color);
Gl.glBegin(Gl.GL_LINES);
{
// Top left to top right
Gl.glVertex2d(x - halfDimension, y + halfDimension);
Gl.glVertex2d(x + halfDimension, y + halfDimension);
// Top right to bottom right
Gl.glVertex2d(x + halfDimension, y + halfDimension);
Gl.glVertex2d(x + halfDimension, y - halfDimension);
// Bottom right to bottom left
Gl.glVertex2d(x + halfDimension, y - halfDimension);
Gl.glVertex2d(x - halfDimension, y - halfDimension);
// Bottom left to top left
Gl.glVertex2d(x - halfDimension, y - halfDimension);
Gl.glVertex2d(x - halfDimension, y + halfDimension);
}
Gl.glEnd();
}
public static void DrawCircle(Circle circle, Color color)
{
GLUtil.SetColor(color);
Gl.glBegin(Gl.GL_LINE_LOOP);
PlotCircleVertices(circle.X, circle.Y, circle.Radius);
Gl.glEnd();
}
public void DrawTriangles(Color color)
{
GLUtil.SetColor(color);
foreach (Triangle triangle in _indexedTriMesh)
{
DrawTriangle(color, triangle.A, triangle.B, triangle.C);
DrawTriangleCentroid(color, triangle);
}
}
public void DrawNodePaths(Color color)
{
GLUtil.SetColor(color);
foreach (NavNode startNode in _allNodes)
{
foreach (NavNode endNode in startNode.Links)
{
PrimitiveDrawer.DrawLine2d(startNode.Position, endNode.Position);
}
}
}
internal static void DrawFilledCircle(Point point, double radius, Color color)
{
GLUtil.SetColor(color);
Gl.glBegin(Gl.GL_TRIANGLE_FAN);
{
Gl.glVertex2d(point.X, point.Y);
PlotCircleVertices(point.X, point.Y, radius);
Gl.glVertex2d(point.X + radius * Math.Cos(0), point.Y + radius * Math.Sin(0));
}
Gl.glEnd();
}
public static void DrawPolygon(Polygon polygon, Color color)
{
GLUtil.SetColor(color);
Gl.glBegin(Gl.GL_LINE_STRIP);
{
foreach (Point p in polygon)
{
Gl.glVertex2d(p.X, p.Y);
}
}
Point point = polygon.VertexList.First();
Gl.glVertex2d(point.X, point.Y);
Gl.glEnd();
}
public static void DrawCrosshair(double x, double y, double dimension, Color color)
{
double halfDimension = dimension / 2;
GLUtil.SetColor(color);
Gl.glBegin(Gl.GL_LINES);
{
// Left to right
Gl.glVertex2d(x - halfDimension, y);
Gl.glVertex2d(x + halfDimension, y);
// Top to bottom
Gl.glVertex2d(x, y + halfDimension);
Gl.glVertex2d(x, y - halfDimension);
}
Gl.glEnd();
}
public static void DrawFilledPolygon(Polygon polygon, Color color)
{
Triangulator tr = new Triangulator(polygon.VertexList.ToArray());
int[] indices = tr.Triangulate();
GLUtil.SetColor(color);
Gl.glBegin(Gl.GL_TRIANGLES);
{
foreach (int index in indices)
{
Point p = polygon.VertexList[index];
Gl.glVertex2d(p.X, p.Y);
}
}
Gl.glEnd();
}