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Simple Light Sources

Simple Light Sources. Types. Directional All light rays have the same direction Simulates parallel rays of sun. Point Light Source Light originates from specific point in world space Light ray has to be formed from object point to light source point. Spotlight

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Simple Light Sources

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  1. Simple Light Sources CSE 681

  2. Types • Directional • All light rays have the same direction • Simulates parallel rays of sun • Point Light Source • Light originates from specific point in world space • Light ray has to be formed from object point to light source point • Spotlight • Point light source with direction of greatest intensity • Optionally has hood outside of which no light is emitted CSE 681

  3. Directional L Where L is constant for all objects in scene N L N CSE 681

  4. Point Light Source L L is formed for each illuminated point or face or object N N L CSE 681

  5. Spotlight (Warn model) Intensity of light falls off according to deviation from D q q L D Clamp to zero N Diffuse: N L N L Hood (optional) If cos(q) > -Li.D Ignore light N L CSE 681

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