@babylonjs/viewer/dist/chunks/spot-light-BR3hWdU7.esm.js

The Babylon Viewer aims to simplify a specific but common Babylon.js use case: loading, viewing, and interacting with a 3D model.

import { b5 as allocateMat4, b6 as createLightBase, b9 as localMatrixFromDirection, b7 as applyWorldMatrixAccessors, b8 as ObservableVec3 } from './index-By0tcgYN.esm.js';

function createSpotLight(position, direction, angle, exponent, intensity = 1) {
  const _localMatrix = allocateMat4();
  const { wm, onDirty, lvs } = createLightBase(() => {
    return localMatrixFromDirection(light.direction.x, light.direction.y, light.direction.z, light.position.x, light.position.y, light.position.z, _localMatrix);
  });
  let _angle = angle;
  let _cosHalfAngle = Math.cos(angle * 0.5);
  const light = applyWorldMatrixAccessors(
    {
      lightType: "spot",
      children: [],
      position: new ObservableVec3(position[0], position[1], position[2], onDirty),
      direction: new ObservableVec3(direction[0], direction[1], direction[2], onDirty),
      angle: 0,
      // placeholder — overridden by defineProperty below
      exponent,
      diffuse: [1, 1, 1],
      specular: [1, 1, 1],
      intensity,
      range: Number.MAX_VALUE,
      _writeLightUbo: (data, offset) => {
        const o = offset;
        const w = light.worldMatrix;
        data[o] = w[12];
        data[o + 1] = w[13];
        data[o + 2] = w[14];
        data[o + 3] = 2;
        data[o + 4] = light.diffuse[0] * light.intensity;
        data[o + 5] = light.diffuse[1] * light.intensity;
        data[o + 6] = light.diffuse[2] * light.intensity;
        data[o + 7] = light.range;
        data[o + 8] = light.specular[0] * light.intensity;
        data[o + 9] = light.specular[1] * light.intensity;
        data[o + 10] = light.specular[2] * light.intensity;
        data[o + 11] = light.exponent;
        data[o + 12] = w[8];
        data[o + 13] = w[9];
        data[o + 14] = w[10];
        data[o + 15] = _cosHalfAngle;
      }
    },
    wm,
    lvs
  );
  Object.defineProperty(light, "angle", {
    get() {
      return _angle;
    },
    set(v) {
      if (v !== _angle) {
        _angle = v;
        _cosHalfAngle = Math.cos(v * 0.5);
        lvs.bump();
      }
    },
    configurable: true,
    enumerable: true
  });
  return light;
}

export { createSpotLight };
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