lighting & shading

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Lighting & Shading. Illumination. Without. Local. Global. Global Illumination. Interaction with matter Consider multiple reflections, transmission, shadows Rendering Equation :. BRDF. Local Illumination - Phong Lighting. General Idea: - PowerPoint PPT Presentation

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Lighting & Shadingcomputer graphics & visualizationcomputer graphics & visualizationSeminar SS 2010 Game Engine DesignLighting & ShadingIllumination

WithoutLocalGlobalcomputer graphics & visualizationSeminar SS 2010 Game Engine DesignLighting & ShadingGlobal IlluminationInteraction with matter Consider multiple reflections, transmission, shadows Rendering Equation:

BRDFcomputer graphics & visualizationSeminar SS 2010 Game Engine DesignLighting & Shading3Local Illumination - Phong LightingGeneral Idea:Consider only (non-area) light sources that are directly visible from the point on the objects surface without reflections.Each point is illuminated independent of its global surroundings (except self-occlusion of light sources)Idea: Approximate illumination by three additive components, representing ambient, diffuse and specular lighting.computer graphics & visualizationSeminar SS 2010 Game Engine DesignLighting & Shading4Local IlluminationAmbient LightingHack for replacing true global illumination(i.e. light bouncing off from other objects)No directionIncoming light component that is identical everywhere in the whole scene

whereka is the ambient material coefficient of reflection with0.0

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