Projective texture mapping: Difference between revisions

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'''Projective texture mapping''' is a method of [[texture mapping]] that allows a textured image to be projected onto a scene as if by a [[slide projector]]. Projective texture mapping is useful in a variety of lighting techniques and it's is the starting point for [[shadow mapping]].

Projective texture mapping is essentially a special [[Matrix (mathematics)|matrix]] [[Coordinate system#Transformations|transformation]] which is performed per-vertex and then linearly interpolated as standard texture mapping.

{{ambox|text='''Highly technical reading'''<br/>The following content assumes the reader is confident with real time [[3d3D computer graphics]] and related technologies such as the involved processing in [[graphics processing unit]]s, with a basic mathematical background. Knowledge of the [[OpenGL]] API is encouraged, although not required.}}

== Fixed function pipeline approach ==