Use DirectX for this. Christian Graus Driven to the arms of OSX by Vista.

Dear all Regards following is my code for zooming a triangle, but it is not working , i think some problem in GLlookAt(); ----------------CODE---------------------- protected override void OnSizeChanged(EventArgs e) { base.OnSizeChanged(e); System.Drawing.Size s = Size; width = (double)s.Width; height = (double)s.Height; GL.glViewport(0,0,s.Width,s.Height); GL.glMatrixMode(GL.GL_PROJECTION); GL.glLoadIdentity(); GL.gluPerspective(60.0, (float)s.Width / (float)s.Height, 1.0, 50.0); GL.glMatrixMode(GL.GL_MODELVIEW); GL.glLoadIdentity(); } public override void glDraw() { GL.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT); // Clear Screen And Depth Buffer GL.glLoadIdentity(); // Reset The Current Modelview Matrix GL.gluLookAt(0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 1.0, 0.0); GL.glLoadIdentity(); GL.glTranslatef(-1.5f, 0.0f, -6.0f); // Move Left 1.5 Units And Into The Screen 6.0 GL.glBegin(GL.GL_TRIANGLES); // Drawing Using Triangles GL.glVertex3f(0.0f, 1.0f, 0.0f); // Top GL.glVertex3f(-1.0f, -1.0f, 0.0f); // Bottom Left GL.glVertex3f(1.0f, -1.0f, 0.0f); // Bottom Right GL.glEnd(); this.Refresh(); // GL.glFlush(); } ----------------------End---------------------------------------------------- kindly help me while zooming the above triangle. waiting for your help regards david:(( david

Me-thinks he's looking for some prewritten code to hand in for class credit. A guide to posting questions on CodeProject[^] Dave Kreskowiak Microsoft MVP Visual Developer - Visual Basic      2006, 2007

Dear Graus Regards! i need the drawing editor just like the one available on the link www.codeproject.com/useritems/DrawToolsRedux.asp in C# and OpenGl.means programming of all the Drawing Editor in C# u:((sing OpenGl. Thanking n advance. Regrds David david

Please don't change your question completely while someone is answering it - now the answer doesn't match the question anymore :doh: Again, the article's discussion is the appropriate place to ask this question, too. Regards, mav -- Black holes are the places where God divided by 0...

Look here - very good explanation on integrating OpenGL and C#. ------------------------- Listen up! Teamwork means staying out of my way! (Seifer, Final Fantasy 8).

Use Tao. It's a framework written by the Mono project guys which implements the original opengGl functions in .NET. http://www.taoframework.com/[^]

See here and scroll to thread no 6. I got same problem several days ago "Courage choose who will follow, Fate choose who will lead" - Lord Gunner, Septerra Core "Press any key to continue, where's the ANY key ?" - Homer Simpsons Drinking gives me amazing powers of insight. I can solve all the worlds problems when drunk, but can never remember the solutions in the morning. - Michael P Butler to Paul Watson on 12/08/03

Following the "brute force and pig-ignorance" approach, I do the following to print an image (C code, but it should give the idea): // get the printer height and width iPageX = GetDeviceCaps (hdcPrn, HORZRES) ; iPageY = GetDeviceCaps (hdcPrn, VERTRES) ; // To make neater printouts, make a border of 10% iTopMargin = iPageY / 10; iLeftMargin = iPageX / 10; // Leaving the area we potentially use as follows: iPageX = iPageX - iLeftMargin - iLeftMargin; iPageY = iPageY - iTopMargin - iTopMargin; // ############################################ // Left out here - do some stuff to get my image and the page into the // same aspect ratio // ############################################ // Copy the DI bitmap to the printer StretchDIBits(hdcPrn, iLeftMargin, iTopMargin, iPageX , iPageY, 0, 0, iImageMaxX, iImageMaxY, lvpBits, lpBitMapHeader, DIB_RGB_COLORS, SRCCOPY); I hope I haven't missed any relevant steps!