A triangle-strip fan starts with the correct winding and all the sub-
sequent triangles must point the same direction.
When modeling regular geometry it’s best to align the strips side by
side as shown in Figure 13-5. Be sure to avoid the edges that can’t
be part of a longer strip (called “singleton strips”).
The Triangles Determine the Shading
Gouraud shading, which is the default in OpenGL real-time display
mode and is available in most 3D game engines, is based on the ver-
tices of the triangles as mentioned at the beginning of this chapter.
When we analyze the wireframe of the sphere and the Gouraud
shading shown in Figure 13-6, we can see how the structure of the
wireframe influences the final look of mesh shading.
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Chapter 13 – Modeling for Games
Figure 13-4: Triangle-strip fan.
Figure 13-5: Continuous edges through a plane are ideal for regular
geometry.