Method deltaToStabalize

src/main/java/fieldbox/boxes/Drawing.java:733–739

(Vec2 dimensions, Vec2 dimensionsNext, Vec2 v, Vec2 at, Vec2 t, Vec2 tn, Vec2 s, Vec2 sn)

	}

	private Vec2 deltaToStabalize(Vec2 dimensions, Vec2 dimensionsNext, Vec2 v, Vec2 at, Vec2 t, Vec2 tn, Vec2 s, Vec2 sn) {
		Vec2 tl_win = drawingSystemToWindowSystem(at, t, s);
		Vec2 tl_winN = drawingSystemToWindowSystemNext(at, tn, sn);
		Vec2 delta = new Vec2(tl_winN).sub(tl_win).sub(new Vec2(dimensionsNext.x * v.x - dimensions.x * v.x, dimensionsNext.y * v.y - dimensions.y * v.y));
		delta = windowSystemToDrawingSystemDelta(delta, tn, sn);
		return delta;
	}

	/**
	 * are we currently inside a repaint. Specifically, are we inside a valid OpenGL context? There are certain OpenGL calls that are only valid inside a valid context.