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  this list of conditions and the following disclaimer in the documentation
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  contributors may be used to endorse or promote products derived from this
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</copyright> */


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

var FlagMaterial = function FlagMaterial() {
    ///////////////////////////////////////////////////////////////////////
    // Instance variables
    ///////////////////////////////////////////////////////////////////////
    this._name = "Flag";
    this._shaderName = "flag";

    this._texMap = 'assets/images/us_flag.png';

    this._time = 0.0;
    this._dTime = 0.1;

    this._speed = 1.0;
    this._waveWidth = 1.0;
    this._waveHeight = 1.0;

    this._hasVertexDeformation = true;

    // array textures indexed by shader uniform name
    this._glTextures = [];

    ///////////////////////////////////////////////////////////////////////
    // Properties
    ///////////////////////////////////////////////////////////////////////
    // all defined in parent PulseMaterial.js
    // load the local default value
    this._propNames         = ["u_tex0",        "u_waveWidth",      "u_waveHeight",     "u_speed" ];
    this._propLabels        = ["Texture map",   "Wave Width",       "Wave Height",      "Speed" ];
    this._propTypes         = ["file",          "float",            "float",            "float" ];
    this._propValues        = [];

    this._propValues[ this._propNames[0] ] = this._texMap.slice(0);
    this._propValues[ this._propNames[1] ] = this._waveWidth;
    this._propValues[ this._propNames[2] ] = this._waveHeight;
    this._propValues[ this._propNames[3] ] = this._speed;


    // a material can be animated or not. default is not.
    // Any material needing continuous rendering should override this method
    this.isAnimated = function()            {  return true;  };
    this.getShaderDef       = function()    {  return flagMaterialDef;  }

    ///////////////////////////////////////////////////////////////////////
    // Methods
    ///////////////////////////////////////////////////////////////////////
    // duplcate method requirde

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

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

        // set up the material node
        this._materialNode = RDGE.createMaterialNode("flagMaterial" + "_" + 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.setShaderValues();
        this.update( 0 );
    }

	this.resetToDefault = function()
	{
		this._propValues[ this._propNames[0] ] = this._texMap.slice(0);
		this._propValues[ this._propNames[1] ] = this._waveWidth;
		this._propValues[ this._propNames[2] ] = this._waveHeight;
		this._propValues[ this._propNames[3] ] = this._speed;

		var nProps = this._propNames.length;
		for (var i=0; i<nProps;  i++)
			this.setProperty( this._propNames[i],  this._propValues[this._propNames[i]]  );
};
};

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

// shader spec (can also be loaded from a .JSON file, or constructed at runtime)
var flagMaterialDef =
{'shaders':
    {
        'defaultVShader':"assets/shaders/Flag.vert.glsl",
        'defaultFShader':"assets/shaders/Flag.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_speed' : { 'type' : 'float' },
                    'u_waveWidth'  :   { 'type' : 'float' },
                    'u_waveHeight'  :   { 'type' : 'float' }
                },

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

FlagMaterial.prototype = new PulseMaterial();

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