/**
 * We have a mapping between GameLib.D3.Texture and the Instance material map.
 * Our GameLib.D3.Material.map.alpha corresponds to THREE.Material.alphaMap
 * @constructor
 * @param texture GameLib.D3.Texture
 * @param instanceMapId string
 */
GameLib.D3.TextureMap = function TextureMap(
    texture,
    instanceMapId
) {
    if (GameLib.D3.Utils.UndefinedOrNull(texture)) {
        texture = null;
    }
    this.texture = texture;

    if (GameLib.D3.Utils.UndefinedOrNull(instanceMapId)) {
        instanceMapId = null;
    }
    this.instanceMapId = instanceMapId;
};

GameLib.D3.TextureMap.prototype.toApiTextureMap = function() {

    var apiTexture = null;

    if (this.texture) {
        apiTexture = this.texture.toApiTexture();
    }

    return new GameLib.D3.TextureMap(apiTexture, this.instanceMapId);

};