czm_sunDirectionWC

An automatic GLSL uniform representing the normalized direction to the sun in world coordinates. This is commonly used for directional lighting computations.

Example

// GLSL declaration
uniform vec3 czm_sunDirectionWC;

See:

• uniformState#sunDirectionWC
• czm_sunPositionWC
• czm_sunDirectionEC

Source:

• aticUniforms.js