createFlares method

dynamic createFlares(dynamic textureA, dynamic textureB)

Implementation

createFlares( textureA, textureB) async {

  var textureLoader = new THREE.TextureLoader();
  var flareA =
      await textureLoader.loadAsync(textureA);//"assets/models/ark/lensflare2.jpg");
  var flareB =
      await textureLoader.loadAsync(textureB);//"assets/models/ark/lensflare0.png");
  var fct = 0.03;
  var sa = 2 * fct, sb = 5 * fct;

  fct = 0.02;
  var params = {
    "a": {
      'map': flareA,
      'color': 0xffffff,
      'blending': THREE.AdditiveBlending
    },
    "b": {
      'map': flareB,
      'color': 0xffffff,
      'blending': THREE.AdditiveBlending
    },
    "ar": {
      'map': flareA,
      'color': 0xff0000,
      'blending': THREE.AdditiveBlending
    },
    "br": {
      'map': flareB,
      'color': 0xff0000,
      'blending': THREE.AdditiveBlending
    }
  };

  var flares = [
// front
    [
      "a",
      sa,
      [47, 38, 120]
    ],
    [
      "a",
      sa,
      [40, 38, 120]
    ],
    [
      "a",
      sa,
      [32, 38, 122]
    ],
    [
      "b",
      sb,
      [47, 38, 120]
    ],
    [
      "b",
      sb,
      [40, 38, 120]
    ],
    [
      "b",
      sb,
      [32, 38, 122]
    ],
    [
      "a",
      sa,
      [-47, 38, 120]
    ],
    [
      "a",
      sa,
      [-40, 38, 120]
    ],
    [
      "a",
      sa,
      [-32, 38, 122]
    ],
    [
      "b",
      sb,
      [-47, 38, 120]
    ],
    [
      "b",
      sb,
      [-40, 38, 120]
    ],
    [
      "b",
      sb,
      [-32, 38, 122]
    ],
// back
    [
      "ar",
      sa,
      [22, 50, -123]
    ],
    [
      "ar",
      sa,
      [32, 49, -123]
    ],
    [
      "br",
      sb,
      [22, 50, -123]
    ],
    [
      "br",
      sb,
      [32, 49, -123]
    ],
    [
      "ar",
      sa,
      [-22, 50, -123]
    ],
    [
      "ar",
      sa,
      [-32, 49, -123]
    ],
    [
      "br",
      sb,
      [-22, 50, -123]
    ],
    [
      "br",
      sb,
      [-32, 49, -123]
    ],
  ];

  THREE.Group group=THREE.Group();
  for (var i = 0; i < flares.length; i++) {
    var p = params[flares[i][0]];

    double s = flares[i][1] as double;

    List<int> item = flares[i][2] as List<int>;
    var x = item[0] * fct;
    var y = item[1] * fct;
    var z = item[2] * fct;

    var material = new THREE.SpriteMaterial(p);
    var sprite = new THREE.Sprite(material);

    var spriteWidth = 128;
    var spriteHeight = 128;

    sprite.scale.set(s * spriteWidth, s * spriteHeight, s);
    sprite.position.set(x, y, z);

    group.add(sprite);

  }
  return group;
}