Capsule light
Capsule light, as the name implies, is a light source shaped as a capsule. Unlike spot and point light sources that have a point origin, the capsule light source has a line at its origin and it is emitting light evenly in all directions. The following screenshot shows a red capsule light source:
Capsule lights can be used to represent fluorescent tubes or a lightsaber.
Getting ready
Capsules can be thought of as a sphere split into two halves, which are then extruded by the length of the capsule light's line length. The following figure shows the line start point A and end points B and R are the light's range:
How to do it...
Capsule
Get HLSL Development Cookbook now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.