Game Development Reference
In-Depth Information
Fig 2.17 A 3D model in Blender showing normals for each plane in blue. To turn this on, select the object and,
in Edit Mode, click on Draw Normals in the Mesh Tools 1 panel.
light source
viewer/camera
normal
a
b
plane
Fig 2.18 Vectors used in calculating the strength of lighting on a plane; a vector to the viewer, the normal and
a vector to the light source.
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