SimpleOpenGlControl Step 1: public Form1() { InitializeComponent(); int height = simpleOpenGlControl1.Height; int width = simpleOpenGlControl1.Width; simpleOpenGlControl1.InitializeContexts(); Gl .glViewport(0, 0, width,height); Gl .glMatrixMode( Gl .GL_PROJECTION); Gl .glLoadIdentity(); Glu .gluPerspective(45.0f, ( double)width / (double)height, 0.01f, 5000.0f); } double xrot, yrot, zrot = 0; Initialize our workspace and variables that will control the rotation of our figure simpleOpenGlControl1.InitializeContexts() Initialize out control context or work area. Gl .glViewport().-Our work area Gl .glMatrixMode().- Specify which matrix is the current matrix Gl .GL_PROJECTION .- Defines the properties of the camera that views the objects Gl .GL_MODELVIEW.- matrix defines how your objects are transformed Glu .gluPerspective.- set up a perspective projection matrix Step 2: Now we are ready to start drawing. For this we will use the Paint event of the control. private void simpleOpenGlControl1_Paint( object sender, PaintEventArgs e) // OnPaint event { Gl .glClear( Gl .GL_COLOR_BUFFER_BIT | Gl .GL_DEPTH_BUFFER_BIT); //clear buffers to preset values Gl .glMatrixMode( Gl .GL_MODELVIEW); Gl .glLoadIdentity(); // load the identity matrix Gl .glTranslated(0, 0, -4); //moves our figure (x,y,z) Gl .glRotated(xrot += 0.5, 1, 0, 0); //rotate on x Gl .glRotated(yrot += 0.3, 0, 1, 0); //rotate on y Gl .glRotated(zrot += 0.2, 0, 0, 1); //rotate on z //face 1 Gl .glBegin( Gl .GL_LINE_LOOP); //start drawing GL_LINE_LOOP is the connection mode Gl .glColor3ub(255, 0, 255); Gl .glVertex3d(1, 1, -1); Gl .glVertex3d(1, -1, -1); Gl .glVertex3d(-1, -1, -1); Gl .glVertex3d(-1, 1, -1); Gl .glEnd(); //face 2 Gl .glBegin( Gl .GL_LINE_LOOP); Gl .glColor3ub(0, 255, 255); Gl .glVertex3d(-1, -1, -1); Gl .glVertex3d(1, -1, -1); Gl .glVertex3d(1, -1, 1); Gl .glVertex3d(-1, -1, 1); Gl .glEnd(); //face 3 Gl .glBegin( Gl .GL_LINE_LOOP); Gl .glColor3ub(255, 255, 0); Gl .glVertex3d(-1, 1, -1); Gl .glVertex3d(-1, -1, -1); Gl .glVertex3d(-1, -1, 1); Gl .glVertex3d(-1, 1, 1); Gl .glEnd(); //face 4 Gl .glBegin( Gl .GL_LINE_LOOP); Gl .glColor3ub(0, 0, 255); Gl .glVertex3d(1, 1, 1); Gl .glVertex3d(1, -1, 1); Gl .glVertex3d(1, -1, -1); Gl .glVertex3d(1, 1, -1); Gl .glEnd(); //face 5 Gl .glBegin( Gl .GL_LINE_LOOP); Gl .glColor3ub(0, 255, 0); Gl .glVertex3d(-1, 1, -1); Gl .glVertex3d(-1, 1, 1); Gl .glVertex3d(1, 1, 1); Gl .glVertex3d(1, 1, -1); Gl .glEnd(); //face 6 Gl .glBegin( Gl .GL_LINE_LOOP); Gl .glColor4d(255, 0, 0, 100); Gl .glVertex3d(-1, 1, 1); Gl .glVertex3d(-1, -1, 1); Gl .glVertex3d(1, -1, 1); Gl .glVertex3d(1, 1, 1); Gl .glEnd(); } Gl .glTranslated(0, 0, -4); //moves our figure (x,y,z) Gl .glRotated(xrot += 0.5, 1, 0, 0); //rotate on x Gl .glRotated(yrot += 0.3, 0, 1, 0); //rotate on y Gl .glRotated(zrot += 0.2, 0, 0, 1); //rotate on z Applies rotation and translation matrix to our figure.
Posted on: Sun, 13 Jul 2014 17:17:22 +0000
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