customProgramCacheKey property

Function customProgramCacheKey
getter/setter pair

In case onBeforeCompile is used, this callback can be used to identify values of settings used in onBeforeCompile, so three.js can reuse a cached shader or recompile the shader for this material as needed.

if(black){
  shader.fragmentShader = shader.fragmentShader.replace('gl_FragColor = vec4(1)', 'gl_FragColor = vec4(0)');
}

material.customProgramCacheKey(){ 
  return black ? '1' : '0';
}

Unlike properties, the callback is not supported by clone, copy and toJson.

Implementation

late Function customProgramCacheKey;