/* <copyright>
This file contains proprietary software owned by Motorola Mobility, Inc.<br/>
No rights, expressed or implied, whatsoever to this software are provided by Motorola Mobility, Inc. hereunder.<br/>
(c) Copyright 2011 Motorola Mobility, Inc.  All Rights Reserved.
</copyright> */


var PulseMaterial = require("js/lib/rdge/materials/pulse-material").PulseMaterial;

///////////////////////////////////////////////////////////////////////
var TwistMaterial = function TwistMaterial() {
    ///////////////////////////////////////////////////////////////////////
    // Instance variables
    ///////////////////////////////////////////////////////////////////////
    this._name = "TwistMaterial";
    this._shaderName = "twist";

    this._texMap = 'assets/images/rocky-normal.jpg';

    this._time = 0.0;
    this._dTime = 0.01;

    ///////////////////////////////////////////////////////////////////////
    // Properties
    ///////////////////////////////////////////////////////////////////////
    // all defined in parent PulseMaterial.js
    // load the local default value
    this._propValues[this._propNames[0]] = this._texMap.slice(0);

    ///////////////////////////////////////////////////////////////////////
    // Methods
    ///////////////////////////////////////////////////////////////////////
    // duplcate method requirde
    this.dup = function (world) {
        // allocate a new uber material
        var newMat = new TwistMaterial();

        // copy over the current values;
        var propNames = [], propValues = [], propTypes = [], propLabels = [];
        this.getAllProperties(propNames, propValues, propTypes, propLabels);
        var n = propNames.length;
        for (var i = 0; i < n; i++) {
            newMat.setProperty(propNames[i], propValues[i]);
        }

        return newMat;
    };

    this.init = function (world) {
        // save the world
        if (world) this.setWorld(world);

        // set up the shader
        this._shader = new RDGE.jshader();
        this._shader.def = twistMaterialDef;
        this._shader.init();

        // set up the material node
        this._materialNode = RDGE.createMaterialNode("twistMaterial" + "_" + world.generateUniqueNodeID());
        this._materialNode.setShader(this._shader);

        this._time = 0;
        if (this._shader && this._shader['default']) {
            this._shader['default'].u_time.set([this._time]);
        }

        // set the shader values in the shader
        this.updateTexture();
        this.setResolution([world.getViewportWidth(), world.getViewportHeight()]);
        this.update(0);
    };

    this.update = function (time) {
        var material = this._materialNode;
        if (material) {
            var technique = material.shaderProgram['default'];
            var renderer = RDGE.globals.engine.getContext().renderer;
            if (renderer && technique) {
                if (this._shader && this._shader['default'])
                    this._shader['default'].u_time.set([this._time]);
                this._time = time;
            }
        }
    };
};

///////////////////////////////////////////////////////////////////////////////////////
// RDGE shader

// shader spec (can also be loaded from a .JSON file, or constructed at runtime)
var twistMaterialDef =
{ 'shaders':
	{
	    'defaultVShader': "assets/shaders/Basic.vert.glsl",
	    'defaultFShader': "assets/shaders/Twist.frag.glsl"
	},
    'techniques':
	{
	    'default':
		[
			{
			    'vshader': 'defaultVShader',
			    'fshader': 'defaultFShader',
			    // attributes
			    'attributes':
				{
				    'vert': { 'type': 'vec3' },
				    'normal': { 'type': 'vec3' },
				    'texcoord': { 'type': 'vec2' }
				},
			    // parameters
			    'params':
				{
				    'u_tex0': { 'type': 'tex2d' },
				    'u_time': { 'type': 'float' },
				    'u_resolution': { 'type': 'vec2' }
				},

			    // render states
			    'states':
				{
				    'depthEnable': true,
				    'offset': [1.0, 0.1]
				}
			}
		]
	}
};

TwistMaterial.prototype = new PulseMaterial();

if (typeof exports === "object") {
    exports.TwistMaterial = TwistMaterial;
}