static void mouseMotion(int x, int y)
{
static int last_x = 0, last_y = 0;
const int dx = x - last_x;
const int dy = y - last_y;
last_x = x;
last_y = y;
if (rotating_camera)
camera.orientation = mouse_rotate(camera.orientation, dx, dy, 0.25);
}
/*
* Perform a rotation gesture in the given `direction` the given `angle` degrees
*
* Possible directions are:
*
* - `:cw`, ':clockwise`, ':clock_wise` to rotate in the clockwise
* direction
* - `:ccw`, ':counter_clockwise`, `:counter_clock_wise` to rotate in
* the the counter clockwise direction
*
* The `angle` parameter is a number of degrees to rotate. There are 360
* degrees in a full rotation, as you would expect in Euclidian geometry.
*
* You can also optionally specify a point on screen for the mouse
* pointer to be moved to before the gesture begins. The movement will
* be instantaneous. Default `point` is {#current_position}.
*
* An animation duration can also be specified. The default is 0.2 seconds.
*
* @overload rotate(direction, angle)
* @param direction [Symbol]
* @param angle [Float]
* @return [CGPoint]
* @overload rotate(direction, angle, point)
* @param direction [Symbol]
* @param angle [Float]
* @param point [CGPoint]
* @return [CGPoint]
* @overload rotate(direction, angle, point, duration)
* @param direction [Symbol]
* @param angle [Float]
* @param point [CGPoint]
* @param duration [Float]
* @return [CGPoint]
*/
static
VALUE
rb_mouse_rotate(const int argc, VALUE* const argv, UNUSED const VALUE self)
{
if (argc < 2)
rb_raise(rb_eArgError, "wrong number of arguments (%d for 2+)", argc);
const VALUE input_dir = argv[0];
CGRotateDirection direction = kCGRotateNone;
if (input_dir == sym_cw ||
input_dir == sym_clockwise ||
input_dir == sym_clock_wise)
direction = kCGRotateClockwise;
else if (input_dir == sym_ccw ||
input_dir == sym_counter_clockwise ||
input_dir == sym_counter_clock_wise)
direction = kCGRotateCounterClockwise;
else
rb_raise(rb_eArgError,
"invalid rotation direction `%s'",
rb_id2name(SYM2ID(input_dir)));
const double angle = NUM2DBL(argv[1]);
if (argc == 2) {
mouse_rotate(direction, angle);
return CURRENT_POSITION;
}
const CGPoint point = rb_mouse_unwrap_point(argv[2]);
if (argc == 3) {
mouse_rotate2(direction, angle, point);
return CURRENT_POSITION;
}
mouse_rotate3(direction, angle, point, NUM2DBL(argv[3]));
return CURRENT_POSITION;
}
