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Light Influencing Bounds
A light's illumination is bounded to a region of influence
Shapes within the region may be lit by the light
Light bounding:
Enables controlled lighting in large scenes
Avoids over-lighting a scene when using multiple lights
Saves lighting computation time
A light region of influence is a bounded volume:
Sphere, box, polytope, or combination using
Bounds
To make a global light, use a huge bounding sphere
By default, lights have no influencing bounds and illuminate nothing!
Common error: forgetting to set influencing bounds
A light bounding volume can be relative to:
The light's coordinate system
A Bounding leaf's coordinate system
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VRarchitect
<
ANU lectures
:
Computer Graphics
:
Illumination and Shading in J3D
>
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Contact
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[
Prev. : 9 / 23 : Spot Lights
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Next : 11 / 23 : Light Influencing Bounds : Examples
]