274 lines
No EOL
9 KiB
C#
274 lines
No EOL
9 KiB
C#
#region --- License ---
|
|
/* Copyright (c) 2006-2008 the OpenTK team
|
|
* See license.txt for licensing details
|
|
*/
|
|
#endregion
|
|
|
|
using System;
|
|
using System.Diagnostics;
|
|
|
|
using OpenTK;
|
|
using OpenTK.OpenGL;
|
|
using OpenTK.OpenGL.Enums;
|
|
using OpenTK.OpenAL;
|
|
using OpenTK.OpenAL.Enums;
|
|
using OpenTK.Audio;
|
|
using OpenTK.Input;
|
|
using System.Runtime.InteropServices;
|
|
|
|
namespace Examples
|
|
{
|
|
[Example("GLU Tesselation Functions Test", ExampleCategory.OpenGL, 10)]
|
|
public class Test : GameWindow
|
|
{
|
|
int startList;
|
|
IntPtr tess;
|
|
|
|
// Define the signatures for the callback functions, and declare the callbacks.
|
|
delegate void BeginCallbackDelegate(BeginMode mode);
|
|
delegate void EndCallbackDelegate();
|
|
delegate void VertexCallbackDelegate(IntPtr v);
|
|
delegate void ErrorCallbackDelegate(GluErrorCode code);
|
|
unsafe delegate void CombineCallbackDelegate(
|
|
[MarshalAs(UnmanagedType.LPArray, SizeConst = 3)]double[] coordinates,
|
|
[MarshalAs(UnmanagedType.LPArray, SizeConst = 4)]double*[] vertexData,
|
|
[MarshalAs(UnmanagedType.LPArray, SizeConst = 4)]float[] weight,
|
|
double** dataOut);
|
|
|
|
BeginCallbackDelegate tessBegin;
|
|
EndCallbackDelegate tessEnd;
|
|
ErrorCallbackDelegate tessError;
|
|
VertexCallbackDelegate tessVertex;
|
|
CombineCallbackDelegate tessCombine;
|
|
|
|
public Test() : base()
|
|
{
|
|
Keyboard.KeyDown += KeyDownHandler;
|
|
}
|
|
|
|
#region --- GLU Tessellation callbacks ---
|
|
|
|
#region BeginHandler
|
|
|
|
void BeginHandler(BeginMode mode)
|
|
{
|
|
GL.Begin(mode);
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region EndHandler
|
|
|
|
void EndHandler()
|
|
{
|
|
GL.End();
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region VertexHandler
|
|
|
|
void VertexHandler(IntPtr v)
|
|
{
|
|
unsafe { GL.Vertex3((double*)v); }
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region ErrorHandler
|
|
|
|
void ErrorHandler(GluErrorCode code)
|
|
{
|
|
System.Windows.Forms.MessageBox.Show(
|
|
String.Format("GLU Error {0}: {1}", code.ToString(), Glu.ErrorString(code)),
|
|
"An error occured while tesselating.");
|
|
this.Exit();
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region CombineHandler
|
|
|
|
unsafe double*[] combineData;
|
|
int data_index = 0;
|
|
unsafe void CombineHandler(double[] coordinates, double*[] data, float[] weight, double** dataOut)
|
|
{
|
|
// Workaround Mono 1.2.6 bug with unsafe inline initializers
|
|
if (combineData == null)
|
|
combineData = new double*[16];
|
|
|
|
double* out_data = combineData[data_index] = (double*)Marshal.AllocHGlobal(6 * sizeof(double));
|
|
int i;
|
|
|
|
out_data[0] = coordinates[0];
|
|
out_data[1] = coordinates[1];
|
|
out_data[2] = coordinates[2];
|
|
|
|
for (i = 3; i < 6; i++)
|
|
{
|
|
double* real_data = (double*)data[i-3];
|
|
out_data[i] = weight[0] * real_data[0] +
|
|
weight[1] * real_data[1] +
|
|
weight[2] * real_data[2] +
|
|
weight[3] * real_data[3];
|
|
}
|
|
data_index++;
|
|
|
|
*dataOut = out_data;
|
|
}
|
|
|
|
#endregion
|
|
|
|
#endregion
|
|
|
|
#region KeyDownHandler
|
|
|
|
public void KeyDownHandler(KeyboardDevice sender, Key key)
|
|
{
|
|
switch (key)
|
|
{
|
|
case Key.Escape:
|
|
this.Exit();
|
|
return;
|
|
}
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region OnResize
|
|
|
|
protected override void OnResize(OpenTK.Platform.ResizeEventArgs e)
|
|
{
|
|
GL.Viewport(0, 0, Width, Height);
|
|
GL.MatrixMode(MatrixMode.Projection);
|
|
GL.LoadIdentity();
|
|
Glu.Ortho2D(0.0, (double)Width, 0.0, (double)Height);
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region OnLoad
|
|
|
|
public override void OnLoad(EventArgs e)
|
|
{
|
|
double[][] rect = new double[4][] {
|
|
new double[] {50.0, 50.0, 0.0},
|
|
new double[] {200.0, 50.0, 0.0},
|
|
new double[] {200.0, 200.0, 0.0},
|
|
new double[] {50.0, 200.0, 0.0}
|
|
};
|
|
double[][] tri = new double[3][] {
|
|
new double[] {75.0, 75.0, 0.0},
|
|
new double[] {125.0, 175.0, 0.0},
|
|
new double[] {175.0, 75.0, 0.0}
|
|
};
|
|
double[][] star = new double[5][] {
|
|
new double[] {250.0, 50.0, 0.0, 1.0, 0.0, 1.0},
|
|
new double[] {325.0, 200.0, 0.0, 1.0, 1.0, 0.0},
|
|
new double[] {400.0, 50.0, 0.0, 0.0, 1.0, 1.0},
|
|
new double[] {250.0, 150.0, 0.0, 1.0, 0.0, 0.0},
|
|
new double[] {400.0, 150.0, 0.0, 0.0, 1.0, 0.0}
|
|
};
|
|
|
|
GL.ClearColor(System.Drawing.Color.SteelBlue);
|
|
|
|
tess = Glu.NewTess();
|
|
startList = GL.GenLists(3);
|
|
|
|
tessVertex = this.VertexHandler;
|
|
tessBegin = this.BeginHandler;
|
|
tessEnd = this.EndHandler;
|
|
tessError = this.ErrorHandler;
|
|
unsafe { tessCombine = this.CombineHandler; }
|
|
Trace.Assert(tessVertex != null, "Failed to load tesselator callback function.");
|
|
Trace.Assert(tessBegin != null, "Failed to load tesselator begin callback function.");
|
|
Trace.Assert(tessEnd != null, "Failed to load tesselator end callback function.");
|
|
Trace.Assert(tessError != null, "Failed to load tesselator error callback function.");
|
|
Trace.Assert(tessCombine != null, "Failed to load tesselator combine callback function.");
|
|
|
|
Glu.TessCallback(tess, TessCallback.TessVertex, tessVertex);
|
|
Glu.TessCallback(tess, TessCallback.TessBegin, tessBegin);
|
|
Glu.TessCallback(tess, TessCallback.TessEnd, tessEnd);
|
|
Glu.TessCallback(tess, TessCallback.TessError, tessError);
|
|
|
|
// rectangle with triangular hole inside
|
|
GL.NewList(startList, ListMode.Compile);
|
|
GL.ShadeModel(ShadingModel.Flat);
|
|
Glu.TessBeginPolygon(tess, IntPtr.Zero);
|
|
Glu.TessBeginContour(tess);
|
|
Glu.TessVertex(tess, rect[0], rect[0]);
|
|
Glu.TessVertex(tess, rect[1], rect[1]);
|
|
Glu.TessVertex(tess, rect[2], rect[2]);
|
|
Glu.TessVertex(tess, rect[3], rect[3]);
|
|
Glu.TessEndContour(tess);
|
|
Glu.TessBeginContour(tess);
|
|
Glu.TessVertex(tess, tri[0], tri[0]);
|
|
Glu.TessVertex(tess, tri[1], tri[1]);
|
|
Glu.TessVertex(tess, tri[2], tri[2]);
|
|
Glu.TessEndContour(tess);
|
|
Glu.TessEndPolygon(tess);
|
|
GL.EndList();
|
|
|
|
Glu.TessCallback(tess, TessCallback.TessVertex, tessVertex);
|
|
Glu.TessCallback(tess, TessCallback.TessBegin, tessBegin);
|
|
Glu.TessCallback(tess, TessCallback.TessEnd, tessEnd);
|
|
Glu.TessCallback(tess, TessCallback.TessError, tessError);
|
|
Glu.TessCallback(tess, TessCallback.TessCombine, tessCombine);
|
|
|
|
// smooth shaded, self-intersecting star
|
|
GL.NewList(startList + 1, ListMode.Compile);
|
|
GL.ShadeModel(ShadingModel.Smooth);
|
|
Glu.TessWindingRuleProperty(tess, TessWinding.TessWindingPositive);
|
|
Glu.TessBeginPolygon(tess, IntPtr.Zero);
|
|
Glu.TessBeginContour(tess);
|
|
Glu.TessVertex(tess, star[0], star[0]);
|
|
Glu.TessVertex(tess, star[1], star[1]);
|
|
Glu.TessVertex(tess, star[2], star[2]);
|
|
Glu.TessVertex(tess, star[3], star[3]);
|
|
Glu.TessVertex(tess, star[4], star[4]);
|
|
Glu.TessEndContour(tess);
|
|
Glu.TessEndPolygon(tess);
|
|
GL.EndList();
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region OnUnload
|
|
|
|
public override void OnUnload(EventArgs e)
|
|
{
|
|
if (tess != IntPtr.Zero)
|
|
Glu.DeleteTess(tess);
|
|
GL.DeleteLists(startList, 3);
|
|
while (data_index != 0)
|
|
unsafe { Marshal.FreeHGlobal((IntPtr)combineData[data_index--]); }
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region OnRenderFrame
|
|
|
|
public override void OnRenderFrame(RenderFrameEventArgs e)
|
|
{
|
|
GL.Clear(ClearBufferMask.ColorBufferBit);
|
|
|
|
GL.Color3(1.0f, 1.0f, 1.0f);
|
|
GL.CallList(startList);
|
|
GL.CallList(startList + 1);
|
|
GL.Flush();
|
|
|
|
this.SwapBuffers();
|
|
}
|
|
|
|
#endregion
|
|
|
|
public static void Main()
|
|
{
|
|
using (Test test = new Test())
|
|
{
|
|
Utilities.SetWindowTitle(test);
|
|
test.Run(30.0, 0.0);
|
|
}
|
|
}
|
|
}
|
|
} |