Version 1 (modified by osg, 7 years ago)

Initial description of example

This example program demonstrates the use of several shadow techniques that are available in osg or that are currently under development.

Volumetric shadowing

Not fully implemented yet

Shadow mapping

Standard depth shadow mapping

Soft shadow maps

Needs shader model 3.0+ support.

Parallel split shadow maps

Currently under development

Program arguments

argument description
-h or --help Display this information.
--positionalLight Use a positional light.
--directionalLight Use a direction light.
--noUpdate Disable the updating the of light source.
--base Add a base geometry to test shadows.
--sv Select ShadowVolume implementation.
--ssm Select SoftShadowMap implementation.
--sm Select ShadowMap implementation.
--pssm Select ParallelSplitShadowMap implementation.
--mapcount ParallelSplitShadowMap texture count.
--mapres ParallelSplitShadowMap texture resolution.
--debug-color ParallelSplitShadowMap display debugging color (only the first 3 maps are color r=0,g=1,b=2.")
--minNearSplit ParallelSplitShadowMap shadow map near offset.
--maxFarDist ParallelSplitShadowMap max far distance to shadow.
--moveVCamFactor ParallelSplitShadowMap move the virtual frustum behind the real camera, (also back ground object can cast shadow).
--NVidea ParallelSplitShadowMap set default PolygonOffset for NVidea.
--PolyOffset?-Factor ParallelSplitShadowMap set PolygonOffset factor.
--PolyOffset?-Unit" ParallelSplitShadowMap set PolygonOffset unit.
--CullFaceFront ParallelSplitShadowMap add a cull face: front.
-1 Use test model one.
-2 Use test model two.
-3 Use test model three.
--two-sided Use two-sided stencil extension for shadow volumes.
--two-pass Use two-pass stencil for shadow volumes.

Key handlers

key description
1 Select trackballmanipulator
2 Select flightmanipulator
3 Select drivemanipulator
4 Select terrainmanipulator
5 Select animationpathmanipulator
s Cycle through statistics modes
w Cycle through solid, wire and point modes
l Toggle lighting
t Toggle textures