dirlight

The dirlight shader module is a lightweight alternative to the full lighting module. It applies a single directional-light dot product and is intended for simple materials or examples that do not need multiple light sources.

Props

lightDirection?: [number, number, number]

Direction of the light in world space.

Usage

In the vertex shader, pass the transformed normal to the module:

dirlight_setNormal(normalize(worldNormal));

In the fragment shader, filter the output color:

fragColor = dirlight_filterColor(fragColor);

Uniforms

{
  lightDirection: 'vec3<f32>'
}

The default light direction is [1, 1, 2].

Shader Functions

dirlight_setNormal(normal)

Stores the surface normal for later lighting evaluation.

dirlight_filterColor(color)

Applies a single directional Lambert-style term to the input color.

Remarks

• dirlight is intentionally simple and does not share the lighting module's multi-light uniform layout.
• If you need ambient light, multiple lights, or shared scene lighting across several material modules, use lighting instead.