/// <summary>
/// Applies VertexBuffer over pipeline and into device and outputs the buffer onto the screen.
/// </summary>
public void Draw()
{
var device = Drawing.Direct3DDevice;
var deviceOptions =
new DeviceOption(device).AddRenderState(RenderState.AlphaBlendEnable, true)
.AddTexture(0, null)
.AddPixelShader(null)
.AddRenderState(RenderState.SourceBlend, RenderState.SourceBlendAlpha)
.AddRenderState(RenderState.DestinationBlend, RenderState.DestinationBlendAlpha)
.AddStreamSource(0, buffer, 0, Utilities.SizeOf <Vertex>())
.AddVertexFormat(VertexFormat.Diffuse | VertexFormat.PositionRhw);
if (Smooth)
{
deviceOptions.AddRenderState(RenderState.MultisampleAntialias, true);
deviceOptions.AddRenderState(RenderState.AntialiasedLineEnable, true);
}
device.Clear(ClearFlags.Target, new ColorBGRA(255f, 255f, 255f, 255f), 0f, 1);
using (new DeviceOptions(deviceOptions))
{
device.DrawPrimitives(PrimitiveType.LineStrip, 0, Resolution);
}
}
/// <summary>
/// Draw a circle directly without instancing a new circle, external drawing method.
/// </summary>
/// <param name="position">Position to draw the Circle</param>
/// <param name="radius">Circle Radius</param>
/// <param name="rotate">Circle Rotation</param>
/// <param name="type">Circle Type</param>
/// <param name="smooth">Smooth Circle</param>
/// <param name="resolution">Circle Resolution</param>
/// <param name="color">Circle Color</param>
public static void Draw(Vector2 position,
float radius,
int rotate,
CircleType type,
bool smooth,
int resolution,
ColorBGRA color)
{
var vertexVertices = new Vertex[resolution + 2];
var angle = rotate * System.Math.PI / 180;
var x = position.X;
var y = position.Y;
var pi = (type == CircleType.Full)
? System.Math.PI
: (type == CircleType.Half) ? System.Math.PI / 2 : System.Math.PI / 4;
var device = Drawing.Direct3DDevice;
#region Circle
byte[] b = { color.R, color.G, color.B, color.A };
var bgr = BitConverter.ToInt32(b, 0);
for (var i = 0; i < vertexVertices.Length; ++i)
{
vertexVertices[i] = new Vertex
{
X = (float)(x - radius * System.Math.Cos(i * (2 * pi / resolution))),
Y = (float)(y - radius * System.Math.Sin(i * (2 * pi / resolution))),
Z = 0f,
Rhw = 1f,
Color = bgr
};
}
#endregion
#region Set Angle
for (var i = 0; i < vertexVertices.Length; ++i)
{
vertexVertices[i].X =
(float)
(x + System.Math.Cos(angle) * (vertexVertices[i].X - x) -
System.Math.Sin(angle) * (vertexVertices[i].Y - y));
vertexVertices[i].Y =
(float)
(y + System.Math.Sin(angle) * (vertexVertices[i].X - x) -
System.Math.Cos(angle) * (vertexVertices[i].Y - y));
}
#endregion
#region Buffer
var buffer = new VertexBuffer(
device, vertexVertices.Length * Utilities.SizeOf <Vertex>(), Usage.WriteOnly, VertexFormat.Diffuse,
Pool.Default);
var vertices = buffer.Lock(0, vertexVertices.Length * Utilities.SizeOf <Vertex>(), LockFlags.None);
foreach (var v in vertexVertices)
{
vertices.Write(v);
}
buffer.Unlock();
#endregion
#region Draw
var deviceOptions =
new DeviceOption(device).AddRenderState(RenderState.AlphaBlendEnable, true)
.AddTexture(0, null)
.AddPixelShader(null)
.AddRenderState(RenderState.SourceBlend, RenderState.SourceBlendAlpha)
.AddRenderState(RenderState.DestinationBlend, RenderState.DestinationBlendAlpha)
.AddStreamSource(0, buffer, 0, Utilities.SizeOf <Vertex>())
.AddVertexFormat(VertexFormat.PositionRhw | VertexFormat.Diffuse);
if (smooth)
{
deviceOptions.AddRenderState(RenderState.MultisampleAntialias, true);
deviceOptions.AddRenderState(RenderState.AntialiasedLineEnable, true);
}
using (new DeviceOptions(deviceOptions))
{
device.DrawPrimitives(PrimitiveType.LineStrip, 0, resolution);
}
#endregion
buffer.Dispose();
}
