// ---
// Copyright (c) 2010 Francesco Cottone, http://www.kesiev.com/
// ---

	var trigo={
		ANGLE_RIGHT:0,
		ANGLE_DOWN:Math.PI*0.5,
		ANGLE_LEFT:Math.PI,
		ANGLE_UP:Math.PI*1.5555555,
		addAngle:function(a,add) {
			a=(a+add)%(Math.PI*2);
			if (a<0) return (Math.PI*2)+a; else return a;
		},
		getDistance:function(p1,p2) {
			return Math.sqrt(Math.pow(p2.x-p1.x,2)+Math.pow(p2.y-p1.y,2))
		},
		getAngle:function(p1,p2,transl) {
			return this.addAngle(Math.atan2(p2.y-p1.y,p2.x-p1.x),(transl?transl:0));
		},
		translate:function(p1,a,d) {
			p1.x=p1.x+Math.cos(a)*d;
			p1.y=p1.y+Math.sin(a)*d;
		},
		translateX:function(x1,a,d) {
			return x1+Math.cos(a)*d
		},
		translateY:function(y1,a,d) {
			return y1+Math.sin(a)*d;
		}
	}