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Lighting

Adding Lights

One white global light illuminates the scene by default. This can be changed through a light manager object and a certain number of lights (limited by OpenGL). The first step is to add the object called LightManager, preferably at the top of the scene file.

<LightManager />

After that, we can add 3 different kinds of lights :

  • a positional light (parameters : color, position) ;

    <PositionalLight name="light2" color="0 1 0" attenuation="0.1" position="0.5 -0.7 2" />

  • a directional light (parameters : color, direction) ;

    <DirectionalLight name="light2" color="0 0 1" direction="1 1 0" />

  • a spotlight (parameters : color, position, direction, cut off, exponent, attenuation)

     <SpotLight name="light1" color="1 0 0" position="0.5 0.7 2" cutoff="25" exponent="1" />

Example