public void DrawEllipse(Ellipse ellipse, float ringWidth, int slices = 64)
{
float innerRadiusRatio = 1 - (ringWidth / ellipse.RadiusX);
float[] offsets;
var solidColor = Color as SolidColor;
if (solidColor != null)
{
Color = RadialGradient.New(Color.Name,
new[]
{
new GradientStop(SharpDX.Mathematics.Color.Transparent, 0),
new GradientStop(solidColor.Color, innerRadiusRatio), new GradientStop(solidColor.Color, 1)
});
}
EllipseColorShader shader = ChooseEllipseOutlineShader(innerRadiusRatio, Color, out offsets);
Color4[] colors = shader(ellipse, Color, offsets.Length * slices, slices);
int[] indices;
Vector3[] vertices = EllipseMesh.CreateRingMesh(ellipse, offsets, slices, Transform, out indices);
var vertexArray = new VertexPositionColor[vertices.Length];
for (int i = 0; i < vertices.Length; i++)
{
vertexArray[i] = new VertexPositionColor()
{
Position = vertices[i], Color = colors[i]
}
}
;
shapes.Add(new ShapeMeshDescription()
{
Vertices = vertexArray, Indices = indices
});
}