Добрый день.
Помогите пожалуйста с GLU_TESS_COMBINE, мне надо закрасить полигон у которого линии пересекаются.
Пишу на C#, использую Tao.
Вот как делаю:
| Код |
private void UserControl1_Load(object sender, EventArgs e)
{
this.InitializeContexts();
this.SwapBuffers();
Gl.glClearColor(255f, 255f, 0f, 0f);
ClearControl();
}
private void UserControl1_SizeChanged(object sender, EventArgs e)
{
ClearControl();
}
public void ClearControl()
{
Gl.glClear(Gl.GL_COLOR_BUFFER_BIT | Gl.GL_DEPTH_BUFFER_BIT);
Gl.glViewport(0, 0, this.Width, this.Height);
Gl.glMatrixMode(Gl.GL_PROJECTION);
Gl.glLoadIdentity();
Glu.gluOrtho2D(0, this.Width, 0, this.Height);
}
void MyBegin(int mode)
{
Gl.glBegin(mode);
}
void MyEnd()
{
Gl.glEnd();
}
/*void MyVertex3dv(double[] v)
{
Gl.glVertex3dv(v);
//Gl.glVertex2dv(v);
}*/
void MyVertex2f(double[] db)
{
Gl.glVertex2d(db[0], 0);
}
private void MyVertex3dv(System.IntPtr vertexData)
{
double[] v = new double[3];
System.Runtime.InteropServices.Marshal.Copy(vertexData, v, 0, 3);
Gl.glVertex3dv(v);
}
public void DrawPolygon(Pen pen, PointF[] pt)
{
Glu.GLUtesselator t = Glu.gluNewTess();
Glu.gluTessProperty(t, Glu.GLU_TESS_WINDING_RULE, Glu.GLU_TESS_WINDING_POSITIVE);
Glu.gluTessProperty(t, Glu.GLU_TESS_WINDING_RULE, Glu.GLU_TESS_WINDING_NONZERO);
Glu.gluTessProperty(t, Glu.GLU_TESS_BOUNDARY_ONLY, Gl.GL_FALSE); // закрашивать полигон
Glu.gluTessCallback(t, Glu.GLU_TESS_BEGIN, new Glu.TessBeginCallback(MyBegin));
Glu.gluTessCallback(t, Glu.GLU_TESS_END, new Glu.TessEndCallback(MyEnd));
Glu.gluTessCallback(t, Glu.GLU_TESS_VERTEX, new Glu.TessVertexCallback(MyVertex3dv));
Glu.gluTessCallback(t, Glu.GLU_TESS_COMBINE, new Glu.TessCombineCallback1(Combine));
Glu.gluTessNormal(t, 0, 0, 1);
Glu.gluTessBeginPolygon(t, IntPtr.Zero);
Glu.gluTessBeginContour(t);
for (int i = 0; i <= pt.Length - 1; i++)
{
double[] dbPoint = new double[3];
dbPoint[0] = pt[i].X;
dbPoint[1] = this.Height - pt[i].Y;
dbPoint[2] = 0;
Glu.gluTessVertex(t, dbPoint, dbPoint);
}
Glu.gluTessEndContour(t);
Glu.gluTessEndPolygon(t);
Glu.gluDeleteTess(t);
}
private static void Combine(double[] coordinates, double[] vertexData, float[] weight, double[] dataOut)
{
double[] vertex = new double[6];
int i;
vertex[0] = coordinates[0];
vertex[1] = coordinates[1];
vertex[2] = coordinates[2];
for (i = 3; i < 5; i++)
{
vertex[i] = weight[0] * vertexData[i] + weight[1] * vertexData[i] + weight[2] * vertexData[i] + weight[3] * vertexData[i];
}
dataOut = vertex;
|
выдает ошибку на строке:
| Код |
Glu.gluTessCallback(t, Glu.GLU_TESS_COMBINE, new Glu.TessCombineCallback1(Combine));
|
текст ошибки:
Array size control parameter must be an integral type.
может что упустил?
|
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