Introduction to OpenGL Pipeline From Programmer View

1. Introduction to OpenGL Pipeline From Programmer View Tong-Yee Lee

2. OpenGL Transformation Pipeline normalized device eye object clip window v e r t e x Modelview Matrix Projection Matrix Perspective Division Viewport Transform Modelview Projection Modelview glTranslate{fd}( x, y, z ) glRotate{fd}( angle, x, y, z ) glScale{fd}( x, y, z ) l l l

3. 3D Transformations

4. OpenGL transformation Matrices

5. tripod OpenGL Transformation Pipeline normalized device eye object clip window v e r t e x Modelview Matrix Projection Matrix Perspective Division Viewport Transform Modelview Projection Modelview l l l gluLookAt( eyex, eyey, eyez, aimx, aimy, aimz, upx, upy, upz )

6. Changes of Coordinate System World coordinate system Camera (eye) coordinate system

7. normalized device eye object clip window v e r t e x viewing volume Modelview Matrix Projection Matrix Perspective Division Viewport Transform Modelview Projection Modelview model l l l OpenGL Transformation Pipeline Perspective projection • Orthographic parallel projection

9. Perspective projection • gluPerspective( fovy, aspect, zNear, zFar ) • glFrustum(left,right,bottom,top,zNear,zFar) • Orthographic parallel projection • glOrtho(left,right,bottom,top,zNear,zFar) • gluOrtho2D( left, right, bottom, top )

10. normalized device eye object clip window v e r t e x Modelview Matrix Projection Matrix Perspective Division Viewport Transform Modelview Projection Modelview l l l h w glViewport( 0, 0, (GLsizei) w, (GLsizei) h );

11. glMaterialfv( face, property, value ); glNormal3f( x, y, z ) glLightfv( light, property, value );