/*
GLGE WebGL Graphics Engine
Copyright (C)2009  Paul Brunt

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
*/

/**
 * @fileOverview
 * @name glge_input.js
 * @author me@paulbrunt.co.uk
 */


(function(GLGE){
	/**
	* @class Creates a heightmap for a region of the world based on an image. Originally created as a quick and easy collision detection. At least until we have a better physics implementation.
	* @deprecated not intended as a permanent addition
	* @param {string} imageURL The url of the image to generate the hightmap for
	* @param {number} imageWidth The width of the image
	* @param {number} imageHeight The height of the image
	* @param {number} x1 The lower X bound of the height map in world coords
	* @param {number} x2 The upper X bound of the height map in world coords
	* @param {number} y1 The lower Y bound of the height map in world coords
	* @param {number} y2 The upper Y bound of the height map in world coords
	* @param {number} z1 The lower Z bound of the height map in world coords
	* @param {number} z2 The upper Z bound of the height map in world coords
	*/
	GLGE.HeightMap=function(imageURL,imageWidth,imageHeight,x1,x2,y1,y2,z1,z2){
		this.canvas=document.createElement("canvas");
		this.context = this.canvas.getContext('2d');
		this.canvas.width=imageWidth;
		this.canvas.height=imageHeight;
		this.minX=x1;
		this.maxX=x2;
		this.minY=y1;
		this.maxY=y2;
		this.minZ=z1;
		this.maxZ=z2;
		var image=new Image();
		image.heightmap=this;
		image.onload=function(e){
			this.heightmap.context.drawImage(this, 0, 0);
			this.heightmap.data=this.heightmap.context.getImageData(0,0,this.heightmap.canvas.width,this.heightmap.canvas.height).data;
		};
		image.src=imageURL;
	}
	GLGE.HeightMap.prototype.canvas=null;
	GLGE.HeightMap.prototype.context=null;
	GLGE.HeightMap.prototype.minZ=null;
	GLGE.HeightMap.prototype.maxZ=null;
	GLGE.HeightMap.prototype.minY=null;
	GLGE.HeightMap.prototype.maxY=null;
	GLGE.HeightMap.prototype.minX=null;
	GLGE.HeightMap.prototype.maxX=null;
	GLGE.HeightMap.prototype.data=null;
	/**
	* Gets the pixel height at the specified image coords
	* @param {number} x the x image coord 
	* @param {number} y the y image coord 
	* @private
	*/
	GLGE.HeightMap.prototype.getPixelAt=function(x,y){
		if(this.data){
			return (this.data[(this.canvas.width*y+x)*4])/255*(this.maxZ-this.minZ);
		}
		else
		{
			return 0;
		}
	}
	/**
	* Function to get he height as specified x, y world coords
	* @param {number} x the x world coord 
	* @param {number} y the y world coord 
	* @returns {number} the height of the level in world units 
	*/
	GLGE.HeightMap.prototype.getHeightAt=function(x,y){
		var imgX=Math.round((x-this.minX)/(this.maxX-this.minX)*this.canvas.width);
		var imgY=Math.round((y-this.minY)/(this.maxY-this.minY)*this.canvas.height);
		return this.getPixelAt(imgX,imgY);
	}
	/**
	* @class Monitors keyboard input for use in render loops
	*/
	GLGE.KeyInput=function(){
		if(!document.keyStates) document.keyStates=[];
		document.addEventListener("keydown",this.onKeyDown,false);
		document.addEventListener("keyup",this.onKeyUp,false);
	}
	/**
	* Tests if a key is pressed
	* @param {number} the keycode to check
	* @returns {boolean} key returns true if the key is being pressed
	*/
	GLGE.KeyInput.prototype.isKeyPressed=function(key){
		if(document.keyStates[key]) return true;
			else return false;
	};
	/**
	* document keydown event used to monitor the key states
	* @param {event} e the event being fired
	* @private
	*/
	GLGE.KeyInput.prototype.onKeyDown=function(e){
		document.keyStates[e.keyCode]=true;
	};
	/**
	* Document keyup event used to monitor the key states
	* @param {event} e the event being fired
	* @private
	*/
	GLGE.KeyInput.prototype.onKeyUp=function(e){
		document.keyStates[e.keyCode]=false;
	};
	/**
	* @class Monitors mouse input for use in render loops
	*/
	GLGE.MouseInput=function(element){
		this.element=element;
		this.element.mouseX=0;
		this.element.mouseY=0;
		if(!this.element.buttonState) this.element.buttonState=[];
		element.addEventListener("mousemove",this.onMouseMove,false);
		element.addEventListener("mousedown",this.onMouseDown,false);
		element.addEventListener("mouseup",this.onMouseUp,false);
	}
	GLGE.MouseInput.prototype.element=null;
	/**
	* Elements mousemove event used to monitor the mouse states
	* @param {event} e the event being fired
	* @private
	*/
	GLGE.MouseInput.prototype.onMouseMove=function(e){
		this.mouseX=e.clientX;
		this.mouseY=e.clientY;
	}
	/**
	* Elements mousedown event used to monitor the mouse states
	* @param {event} e the event being fired
	* @private
	*/
	GLGE.MouseInput.prototype.onMouseDown=function(e){
		this.buttonState[e.button]=true;
	}
	/**
	* Elements mouseup event used to monitor the mouse states
	* @param {event} e the event being fired
	* @private
	*/
	GLGE.MouseInput.prototype.onMouseUp=function(e){
		this.buttonState[e.button]=false;
	}
	/**
	* Tests if a mouse button is pressed
	* @param {number} button the button to check
	* @returns {boolean} returns true if the button is being pressed
	*/
	GLGE.MouseInput.prototype.isButtonDown=function(button){
		if(this.element.buttonState[button]) return true;
			else return false;
	}
	/**
	* Gets the mouse coords
	* @returns {object} the current mouse coors
	*/
	GLGE.MouseInput.prototype.getMousePosition=function(){
		return {x:this.element.mouseX,y:this.element.mouseY}
	}

	/**
	* @constant 
	* @description Enumeration for the left mouse button
	*/
	GLGE.MI_LEFT=0;
	/**
	* @constant 
	* @description Enumeration for the middle mouse button
	*/
	GLGE.MI_MIDDLE=1;
	/**
	* @constant 
	* @description Enumeration for the right mouse button
	*/
	GLGE.MI_RIGHT=2;

	/**
	* @constant 
	* @description Enumeration for the backspace key
	*/
	GLGE.KI_BACKSPACE=8;
	/**
	* @constant 
	* @description Enumeration for the tab key
	*/
	GLGE.KI_TAB=9;
	/**
	* @constant 
	* @description Enumeration for the enter key
	*/
	GLGE.KI_ENTER=13;
	/**
	* @constant 
	* @description Enumeration for the shift key
	*/
	GLGE.KI_SHIFT=16;
	/**
	* @constant 
	* @description Enumeration for the ctrl key
	*/
	GLGE.KI_CTRL=17;
	/**
	* @constant 
	* @description Enumeration for the alt key
	*/
	GLGE.KI_ALT=18;
	/**
	* @constant 
	* @description Enumeration for the pause/break key
	*/
	GLGE.KI_PAUSE_BREAK=19;
	/**
	* @constant 
	* @description Enumeration for the caps lock key
	*/
	GLGE.KI_CAPS_LOCK=20;
	/**
	* @constant 
	* @description Enumeration for the escape key
	*/
	GLGE.KI_ESCAPE=27;
	/**
	* @constant 
	* @description Enumeration for the page up key
	*/
	GLGE.KI_PAGE_UP=33;
	/**
	* @constant 
	* @description Enumeration for the page down key
	*/
	GLGE.KI_PAGE_DOWN=34;
	/**
	* @constant 
	* @description Enumeration for the end key
	*/
	GLGE.KI_END=35;
	/**
	* @constant 
	* @description Enumeration for the home key
	*/
	GLGE.KI_HOME=36;
	/**
	* @constant 
	* @description Enumeration for the left arrow key
	*/
	GLGE.KI_LEFT_ARROW=37;
	/**
	* @constant 
	* @description Enumeration for the up arrow key
	*/
	GLGE.KI_UP_ARROW=38;
	/**
	* @constant 
	* @description Enumeration for the right arrow key
	*/
	GLGE.KI_RIGHT_ARROW=39;
	/**
	* @constant 
	* @description Enumeration for the down arrow key
	*/
	GLGE.KI_DOWN_ARROW=40;
	/**
	* @constant 
	* @description Enumeration for the insert key
	*/
	GLGE.KI_INSERT=45;
	/**
	* @constant 
	* @description Enumeration for the delete key
	*/
	GLGE.KI_DELETE=46;
	/**
	* @constant 
	* @description Enumeration for the 0 key
	*/
	GLGE.KI_0=48;
	/**
	* @constant 
	* @description Enumeration for the 1 key
	*/
	GLGE.KI_1=49;
	/**
	* @constant 
	* @description Enumeration for the 2 key
	*/
	GLGE.KI_2=50;
	/**
	* @constant 
	* @description Enumeration for the 3 key
	*/
	GLGE.KI_3=51;
	/**
	* @constant 
	* @description Enumeration for the 4 key
	*/
	GLGE.KI_4=52;
	/**
	* @constant 
	* @description Enumeration for the 5 key
	*/
	GLGE.KI_5=53;
	/**
	* @constant 
	* @description Enumeration for the 6 key
	*/
	GLGE.KI_6=54;
	/**
	* @constant 
	* @description Enumeration for the 7 key
	*/
	GLGE.KI_7=55;
	/**
	* @constant 
	* @description Enumeration for the 8 key
	*/
	GLGE.KI_8=56;
	/**
	* @constant 
	* @description Enumeration for the 9 key
	*/
	GLGE.KI_9=57;
	/**
	* @constant 
	* @description Enumeration for the a key
	*/
	GLGE.KI_A=65;
	/**
	* @constant 
	* @description Enumeration for the b key
	*/
	GLGE.KI_B=66;
	/**
	* @constant 
	* @description Enumeration for the c key
	*/
	GLGE.KI_C=67;
	/**
	* @constant 
	* @description Enumeration for the d key
	*/
	GLGE.KI_D=68;
	/**
	* @constant 
	* @description Enumeration for the e key
	*/
	GLGE.KI_E=69;
	/**
	* @constant 
	* @description Enumeration for the f key
	*/
	GLGE.KI_F=70;
	/**
	* @constant 
	* @description Enumeration for the g key
	*/
	GLGE.KI_G=71;
	/**
	* @constant 
	* @description Enumeration for the h key
	*/
	GLGE.KI_H=72;
	/**
	* @constant 
	* @description Enumeration for the i key
	*/
	GLGE.KI_I=73;
	/**
	* @constant 
	* @description Enumeration for the j key
	*/
	GLGE.KI_J=74;
	/**
	* @constant 
	* @description Enumeration for the k key
	*/
	GLGE.KI_K=75;
	/**
	* @constant 
	* @description Enumeration for the l key
	*/
	GLGE.KI_L=76;
	/**
	* @constant 
	* @description Enumeration for the m key
	*/
	GLGE.KI_M=77;
	/**
	* @constant 
	* @description Enumeration for the n key
	*/
	GLGE.KI_N=78;
	/**
	* @constant 
	* @description Enumeration for the o key
	*/
	GLGE.KI_O=79;
	/**
	* @constant 
	* @description Enumeration for the p key
	*/
	GLGE.KI_P=80;
	/**
	* @constant 
	* @description Enumeration for the q key
	*/
	GLGE.KI_Q=81;
	/**
	* @constant 
	* @description Enumeration for the r key
	*/
	GLGE.KI_R=82;
	/**
	* @constant 
	* @description Enumeration for the s key
	*/
	GLGE.KI_S=83;
	/**
	* @constant 
	* @description Enumeration for the t key
	*/
	GLGE.KI_T=84;
	/**
	* @constant 
	* @description Enumeration for the u key
	*/
	GLGE.KI_U=85;
	/**
	* @constant 
	* @description Enumeration for the v key
	*/
	GLGE.KI_V=86;
	/**
	* @constant 
	* @description Enumeration for the w key
	*/
	GLGE.KI_W=87;
	/**
	* @constant 
	* @description Enumeration for the x key
	*/
	GLGE.KI_X=88;
	/**
	* @constant 
	* @description Enumeration for the y key
	*/
	GLGE.KI_Y=89;
	/**
	* @constant 
	* @description Enumeration for the z key
	*/
	GLGE.KI_Z=90;
	/**
	* @constant 
	* @description Enumeration for the left window key key
	*/
	GLGE.KI_LEFT_WINDOW_KEY=91;
	/**
	* @constant 
	* @description Enumeration for the right window key key
	*/
	GLGE.KI_RIGHT_WINDOW_KEY=92;
	/**
	* @constant 
	* @description Enumeration for the select key key
	*/
	GLGE.KI_SELECT_KEY=93;
	/**
	* @constant 
	* @description Enumeration for the numpad 0 key
	*/
	GLGE.KI_NUMPAD_0=96;
	/**
	* @constant 
	* @description Enumeration for the numpad 1 key
	*/
	GLGE.KI_NUMPAD_1=97;
	/**
	* @constant 
	* @description Enumeration for the numpad 2 key
	*/
	GLGE.KI_NUMPAD_2=98;
	/**
	* @constant 
	* @description Enumeration for the numpad 3 key
	*/
	GLGE.KI_NUMPAD_3=99;
	/**
	* @constant 
	* @description Enumeration for the numpad 4 key
	*/
	GLGE.KI_NUMPAD_4=100;
	/**
	* @constant 
	* @description Enumeration for the numpad 5 key
	*/
	GLGE.KI_NUMPAD_5=101;
	/**
	* @constant 
	* @description Enumeration for the numpad 6 key
	*/
	GLGE.KI_NUMPAD_6=102;
	/**
	* @constant 
	* @description Enumeration for the numpad 7 key
	*/
	GLGE.KI_NUMPAD_7=103;
	/**
	* @constant 
	* @description Enumeration for the numpad 8 key
	*/
	GLGE.KI_NUMPAD_8=104;
	/**
	* @constant 
	* @description Enumeration for the numpad 9 key
	*/
	GLGE.KI_NUMPAD_9=105;
	/**
	* @constant 
	* @description Enumeration for the multiply key
	*/
	GLGE.KI_MULTIPLY=106;
	/**
	* @constant 
	* @description Enumeration for the add key
	*/
	GLGE.KI_ADD=107;
	/**
	* @constant 
	* @description Enumeration for the subtract key
	*/
	GLGE.KI_SUBTRACT=109;
	/**
	* @constant 
	* @description Enumeration for the decimal point key
	*/
	GLGE.KI_DECIMAL_POINT=110;
	/**
	* @constant 
	* @description Enumeration for the divide key
	*/
	GLGE.KI_DIVIDE=111;
	/**
	* @constant 
	* @description Enumeration for the f1 key
	*/
	GLGE.KI_F1=112;
	/**
	* @constant 
	* @description Enumeration for the f2 key
	*/
	GLGE.KI_F2=113;
	/**
	* @constant 
	* @description Enumeration for the f3 key
	*/
	GLGE.KI_F3=114;
	/**
	* @constant 
	* @description Enumeration for the f4 key
	*/
	GLGE.KI_F4=115;
	/**
	* @constant 
	* @description Enumeration for the f5 key
	*/
	GLGE.KI_F5=116;
	/**
	* @constant 
	* @description Enumeration for the f6 key
	*/
	GLGE.KI_F6=117;
	/**
	* @constant 
	* @description Enumeration for the f7 key
	*/
	GLGE.KI_F7=118;
	/**
	* @constant 
	* @description Enumeration for the f8 key
	*/
	GLGE.KI_F8=119;
	/**
	* @constant 
	* @description Enumeration for the f9 key
	*/
	GLGE.KI_F9=120;
	/**
	* @constant 
	* @description Enumeration for the f10 key
	*/
	GLGE.KI_F10=121;
	/**
	* @constant 
	* @description Enumeration for the f11 key
	*/
	GLGE.KI_F11=122;
	/**
	* @constant 
	* @description Enumeration for the f12 key
	*/
	GLGE.KI_F12=123;
	/**
	* @constant 
	* @description Enumeration for the num lock key
	*/
	GLGE.KI_NUM_LOCK=144;
	/**
	* @constant 
	* @description Enumeration for the scroll lock key
	*/
	GLGE.KI_SCROLL_LOCK=145;
	/**
	* @constant 
	* @description Enumeration for the semi-colon key
	*/
	GLGE.KI_SEMI_COLON=186;
	/**
	* @constant 
	* @description Enumeration for the equal sign key
	*/
	GLGE.KI_EQUAL_SIGN=187;
	/**
	* @constant 
	* @description Enumeration for the comma key
	*/
	GLGE.KI_COMMA=188;
	/**
	* @constant 
	* @description Enumeration for the dash key
	*/
	GLGE.KI_DASH=189;
	/**
	* @constant 
	* @description Enumeration for the period key
	*/
	GLGE.KI_PERIOD=190;
	/**
	* @constant 
	* @description Enumeration for the forward slash key
	*/
	GLGE.KI_FORWARD_SLASH=191;
	/**
	* @constant 
	* @description Enumeration for the grave accent key
	*/
	GLGE.KI_GRAVE_ACCENT=192;
	/**
	* @constant 
	* @description Enumeration for the open bracket key
	*/
	GLGE.KI_OPEN_BRACKET=219;
	/**
	* @constant 
	* @description Enumeration for the back slash key
	*/
	GLGE.KI_BACK_SLASH=220;
	/**
	* @constant 
	* @description Enumeration for the close braket key
	*/
	GLGE.KI_CLOSE_BRAKET=221;
	/**
	* @constant 
	* @description Enumeration for the single quote key
	*/
	GLGE.KI_SINGLE_QUOTE=222;
})(GLGE);




/*
junk code
var canvas=document.createElement("canvas");
canvas.height=300;
canvas.width=300;
//var canvas=document.getElementById("canvas");
var canvasContext = canvas.getContext('2d');
var map=new Image();
map.onload=function(e){
	canvasContext.drawImage(this, 0, 0);
	document.getElementById('test').src=canvas.toDataURL("image/png");
}
map.src="http://ecom.armourhome.co.uk/ecom/themes/q2radio/images/q2background.jpg";
*/