Babylon.js/Babylon/Lights/babylon.spotLight.js

var __extends = this.__extends || function (d, b) {
    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
    function __() { this.constructor = d; }
    __.prototype = b.prototype;
    d.prototype = new __();
};
var BABYLON;
(function (BABYLON) {
    var SpotLight = (function (_super) {
        __extends(SpotLight, _super);
        function SpotLight(name, position, direction, angle, exponent, scene) {
            _super.call(this, name, scene);
            this.position = position;
            this.direction = direction;
            this.angle = angle;
            this.exponent = exponent;
        }
        SpotLight.prototype.getAbsolutePosition = function () {
            return this._transformedPosition ? this._transformedPosition : this.position;
        };

        SpotLight.prototype.setDirectionToTarget = function (target) {
            this.direction = BABYLON.Vector3.Normalize(target.subtract(this.position));
            return this.direction;
        };

        SpotLight.prototype.transferToEffect = function (effect, positionUniformName, directionUniformName) {
            var normalizeDirection;

            if (this.parent && this.parent.getWorldMatrix) {
                if (!this._transformedDirection) {
                    this._transformedDirection = BABYLON.Vector3.Zero();
                }

                if (!this._transformedPosition) {
                    this._transformedPosition = BABYLON.Vector3.Zero();
                }

                var parentWorldMatrix = this.parent.getWorldMatrix();

                BABYLON.Vector3.TransformCoordinatesToRef(this.position, parentWorldMatrix, this._transformedPosition);
                BABYLON.Vector3.TransformNormalToRef(this.direction, parentWorldMatrix, this._transformedDirection);

                effect.setFloat4(positionUniformName, this._transformedPosition.x, this._transformedPosition.y, this._transformedPosition.z, this.exponent);
                normalizeDirection = BABYLON.Vector3.Normalize(this._transformedDirection);
            } else {
                effect.setFloat4(positionUniformName, this.position.x, this.position.y, this.position.z, this.exponent);
                normalizeDirection = BABYLON.Vector3.Normalize(this.direction);
            }

            effect.setFloat4(directionUniformName, normalizeDirection.x, normalizeDirection.y, normalizeDirection.z, Math.cos(this.angle * 0.5));
        };

        SpotLight.prototype._getWorldMatrix = function () {
            if (!this._worldMatrix) {
                this._worldMatrix = BABYLON.Matrix.Identity();
            }

            BABYLON.Matrix.TranslationToRef(this.position.x, this.position.y, this.position.z, this._worldMatrix);

            return this._worldMatrix;
        };
        return SpotLight;
    })(BABYLON.Light);
    BABYLON.SpotLight = SpotLight;
})(BABYLON || (BABYLON = {}));
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