Tessellation for Displacement Map Application
Displacement mapping involves perturbing the base surface along its normal using specified displacement values to create a new displaced surface. This can be performed through the parameterization over a 2D domain of the base surface , its normal field , and the displacement scalar field . As Figure 1 indicates, the mapping technique displaces the position on the surface along its normal by an offset , read from a displacement map, resulting in the displaced position . We define the points on the new displaced surface as .
Cross section of the displaced surface.