perspective shadow maps

Implementation Diary (html)

basics

Polygon ordering (CW,CCW) type(convex,concave) with C source code

creating shadows discussion of various technics to create shadows in OpenGL, but the ideas are the same for other api's. Note the text about Shadow Map Trade-offs which describes some of the motivations for perspective shadow maps namely perspective aliasing artefacts

The Z Coordinate and Perspective Projection for OpenGL, but useful for everyone using a z-buffer

Projections with math basics plus how it is done in OpenGL, the most comprehensive page about this stuff i've found ( cached )

Why Map Z is essential knowlege to comprehend the psm algorithm ( cached )

Mapping Z you need to understand this stuff to fully comprehend the problems with the psm algorithm ( cached )

Why a scene in perspective space is linear in 1/Z, rather than in Z explains a few points about perspective projection matrixes

a list of some shadow mapping algorithms with short explanations, bibliography and links to the papers (html)

the algorithm

Perspective Shadow Maps summarises the idea of the paper, with a recipe for computing the perspective shadow map matrix

a discussion of problems with perspective shadow maps

a discussion why perspective shadow maps should not work in general outdoor scenes

a newsgroup thread about the problems of various shadow map technics in outdoor scenes, with a great deal about the difficulties with perspective shadow maps and similar approaches

implementations

X-Box implementation for simple cases (D3D)

advanced

Real-Time Perspective Optimal Shadow Maps (thesis)[pdf]

misc. papers and files about perpspective shadow maps and related topics [directory]