import Light from '../Light';
import Vector3 from '../math/Vector3';

/**
 * @constructor clay.light.Tube
 * @extends {clay.Light}
 */
var TubeLight = Light.extend(
/** @lends clay.light.Tube# */
{
    /**
     * @type {number}
     */
    range: 100,

    /**
     * @type {number}
     */
    length: 10
}, {

    type: 'TUBE_LIGHT',

    uniformTemplates: {
        tubeLightPosition: {
            type: '3f',
            value: function(instance) {
                return instance.getWorldPosition().array;
            }
        },

        tubeLightExtend: {
            type: '3f',
            value: (function() {
                var x = new Vector3();
                return function(instance) {
                    // Extend in x axis
                    return x.copy(instance.worldTransform.x)
                        .normalize().scale(instance.length / 2).array;
                };
            })()
        },

        tubeLightRange: {
            type: '1f',
            value: function(instance) {
                return instance.range;
            }
        },

        tubeLightColor: {
            type: '3f',
            value: function(instance) {
                var color = instance.color;
                var intensity = instance.intensity;
                return [color[0]*intensity, color[1]*intensity, color[2]*intensity];
            }
        }
    }
});

export default TubeLight;