some vector stuff for peter

maths

degrees = angle * (180/Math.PI);
slope = tangent(degrees);
length = Math.sqrt(1*1,m*m);
vector = [1/length,m/length];
next_point = function(distance,start,magnatude){
	var end = []
	magnatude[0] = magnatude[0]*distance;
	magnatude[1] = magnatude[1]*distance;
	end[0] = start[0] + magnatude[0];
	end[1] = start[1] + magnatude[1];
	return end;
}
next = next_point(ship.speed*modifier,[ship.x,ship.y],vector);
ship.x = next[0];
ship.y = next[1];