new BHell_Mover_Spline()
Uniform Catmull-Rom spline movement class. Given four points, determines a smooth path which passes between the two innermost ones.
Extends
Methods
initialize(p0x, p0y, p1x, p1y, p2x, p2y, p3x, p3y)
Sets up the four control points. Since the spline is uniform, no further parameters are needed.
If P0 == P1 and P2 == P3, the trajectory is a straight line between P1 and P2, otherwise a curved path (passing between P1 and P2) is determined by the relative position of P0 from P1 and P3 from P2 (e.g. if P0 is above-right of P1 and P3 is below-left of P2, the overall trajectory will be an "S").
Parameters:
| Name | Type | Description |
|---|---|---|
p0x |
X coordinate of the first point. |
|
p0y |
Y coordinate of the first point. |
|
p1x |
X coordinate of the second point. The movement starts from here. |
|
p1y |
Y coordinate of the second point. The movement starts from here. |
|
p2x |
X coordinate of the third point. The movement ends here. |
|
p2y |
Y coordinate of the third point. The movement ends here. |
|
p3x |
X coordinate of the last point. |
|
p3y |
Y coordinate of the last point. |
- Overrides:
- Source:
move(oldX, oldY, speed) → {Array}
Moves along the initialised spline, unless P2 is already reached.
Parameters:
| Name | Type | Description |
|---|---|---|
oldX |
Old x coordinate. |
|
oldY |
Old y coordinate. |
|
speed |
Movement speed (in thousandths of distance between P1 and P2 per frame). |
- Overrides:
- Source:
Returns:
- Type
- Array