gpu-curtains/dist/esm/core/shaders/chunks/fragment/body/get-IBL-indirect-radiance.mjs

gpu-curtains is a 3D WebGPU rendering engine. It can be used as a standalone 3D engine, but also includes extra classes focused on mapping 3d objects to DOM elements; It allows users to synchronize values such as position, sizing, or scale between them.

//#region src/core/shaders/chunks/fragment/body/get-IBL-indirect-radiance.ts
/**
* Get the environment map indirect radiance (specular).
* @param parameters - Parameters to use to apply PBR shading.
* @param parameters.extensionsUsed - {@link PBRFragmentShaderInputParams.extensionsUsed | extensionsUsed} to check if anisotropy is enabled.
* @param parameters.environmentMap - {@link extras/environmentMap/EnvironmentMap.EnvironmentMap | EnvironmentMap} to use for indirect radiance if any.
* @returns - String with environment map indirect radiance applied to `radiance` (`vec3f`).
*/
const getIBLIndirectRadiance = ({ extensionsUsed = [], environmentMap = null }) => {
	let iblIndirectSpecular = "";
	if (environmentMap) if (extensionsUsed.includes("KHR_materials_anisotropy")) iblIndirectSpecular += `
  iblRadiance += getIBLIndirectAnisotropyRadiance(
    normal,
    viewDirection,
    roughness,
    ${environmentMap.sampler.name},
    ${environmentMap.specularTexture.options.name},
    envRotation,
    envSpecularIntensity,
    anisotropyB,
    anisotropy
  );
  
  radiance += iblRadiance;`;
	else iblIndirectSpecular += `
  iblRadiance += getIBLIndirectRadiance(
    normal,
    viewDirection,
    roughness,
    ${environmentMap.sampler.name},
    ${environmentMap.specularTexture.options.name},
    envRotation,
    envSpecularIntensity,
  );
  
  radiance += iblRadiance;`;
	return iblIndirectSpecular;
};
//#endregion
export { getIBLIndirectRadiance };