@luma.gl/shadertools/dist/esm/modules/phong-lighting/phong-lighting.js

Shader module system for luma.gl

import { lights } from '../lights/lights';
import lightingShader from './phong-lighting.glsl';
const INITIAL_MODULE_OPTIONS = {};

function getMaterialUniforms(material) {
  const {
    ambient = 0.35,
    diffuse = 0.6,
    shininess = 32,
    specularColor = [30, 30, 30]
  } = material;
  return {
    lighting_uAmbient: ambient,
    lighting_uDiffuse: diffuse,
    lighting_uShininess: shininess,
    lighting_uSpecularColor: specularColor.map(x => x / 255)
  };
}

function getUniforms() {
  let opts = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : INITIAL_MODULE_OPTIONS;

  if (!('material' in opts)) {
    return {};
  }

  const {
    material
  } = opts;

  if (!material) {
    return {
      lighting_uEnabled: false
    };
  }

  return getMaterialUniforms(material);
}

export const gouraudLighting = {
  name: 'gouraud-lighting',
  dependencies: [lights],
  vs: lightingShader,
  defines: {
    LIGHTING_VERTEX: 1
  },
  getUniforms
};
export const phongLighting = {
  name: 'phong-lighting',
  dependencies: [lights],
  fs: lightingShader,
  defines: {
    LIGHTING_FRAGMENT: 1
  },
  getUniforms
};
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