OpenGL - 3D Shapes

Using the same #d cube files you have been working on, make changes to view your first quadric. A sphere.

Quadrics uses GLU to render 3D shapes such as spheres, disks, and cylinders.

In glbox.cpp (in paintGL):

To create a quadric use:
GLUquadricObj* q = gluNewQuadric( );
The default values are probably not what you want, so then you have to specify the rendering attributes.
This controls the orientation of the sphere either outside to view from the outside, or inside to - can you guess?!
gluQuadricOrientation(q, GLU_OUTSIDE);
If you wish to light your quadrics you need to specify smooth shading.
gluQuadricNormals(q, GLU_SMOOTH);
You can choose the drawing style of the quadric. Try changing this value to see the effects of: GLU_POINT, GLU_SILHOUETTE, GLU_FILL.
gluQuadricDrawStyle ( q, GLU_LINE );
Finally draw the type of quadric. Try drawing gluCylinder(), gluDisk(), or gluPartialDisk() as well.
gluSphere ( q, 1.8, 10, 10 );
Remember you will have to delete the quadri when you are finished. using:.
gluDeleteQuadric();

Remember to check the documentation.

Read chapter 3 of the OpenGL Programming Guide: Viewing. Pay special attention to Matrices and how OpenGL deals with them.

Here is an updated and re-commented version of the files. www.cpsc.ucalgary.ca/~pj/453/box/3DSphere/

Useful References

Contact me
email: pj@cpsc.ucalgary.ca
Tel: (403) 220 7041.