physics_particle_delete_region_box(x, y, halfWidth, halfHeight)
| 参数 | 描述 |
|---|---|
| x | The x position of the center of the area to delete. |
| y | The y position of the center of the area to delete. |
| halfWidth | The half width of the rectangle. |
| halfHeight | The half height of the rectangle. |
返回： N/A（无返回值）
With this function you can delete (remove) all the particles
that fall within the bounds of the defined rectangular area from
the physics simulation in the current room. The function takes the
x and y position for the center of the area to delete as well as
the half width and height of the rectangle (in pixels) which
defines the area.
physics_particle_delete_region_box(mouse_x, mouse_y, 32, 32);
The above code will delete all particles found in a rectangular area around the mouse position.