3D Real-time Cave Painting Style Renderer May 2001

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v. 1.0

This demo application uses the techniques I used for cartoon rendering

to achieve a rendering in the style of a cave painting.

Like the Cartoon style renderer, a 1D texture table is used to select

regions for shading. The table contains alpha channel values so the shading

is also blended with the background.

For the ink lines, a more sketched style is achieved by drawing the silhouette

multiple times, randomly jittering the endpoints. To make the random lines into

continuous strokes, edges are precalculated and combined into potential strokes.

The edges are sorted in object space from top-bottom and left-right to allow them

to be rendered in a more artistic style. As all these calculations are made

at startup, when rendered, it is simply a matter of walking the edge list and drawing

any edges that are visible.

Manipulating the View

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LMB to Rotate view in X and Y

LMB+SHIFT to Rotate in Z

RMB to Translate in Z

RMB+SHIFT to Translate in X and Y