Page 202 - DCAP504_Computer Graphics

Unit 13: Advanced Computer Graphics

The following figure 13.3 depicts the view of a texture mapping a geometric model.

Figure 13.3: Texture Mapping

Source: http://www.cs.kent.edu/~farrell/cg05/lectures/cg22.pdf
2. Environmental or Reflection Mapping: Environmental or reflection mapping uses a picture from
the environment in order to texture the maps. It also enables you to simulate high specific
surfaces.

Figure 13.4: Environment Mapping

Source: http://www.cs.kent.edu/~farrell/cg05/lectures/cg22.pdf
Environmental mapping is a technique used to approximate the appearance of reflective surfaces
by a pre-computed texture image. There are several methods used to store the surrounding
environment. They are:
(a) Sphere Mapping Technique: In sphere mapping technique the single texture contains the
image of the surroundings as reflected on a mirror ball. This method is surpassed by the cube
mapping technique.
(b) Cube Mapping Technique: In cube mapping technique the environment is projected onto six
faces of a cube. These projections are then stored as six square textures and are unfolded into

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