physics_fixture_set_edge_shape(fixture, local_x1, local_y1, local_x2, local_y2)
| Argument | Description |
|---|---|
| fixture | the index of the fixture |
| local_x1 | start x position for the edge |
| local_y1 | start y position for the edge |
| local_x2 | end x position for the edge |
| local_y2 | end y position for the edge |
Returns: N/A
This function defines an "edge" fixture shape. An edge shape is
simply a line that will generate a collision when other fixtures
over lap it, and can be very useful for generating (for example)
terrain, or for creating borders around a room. The position of the
edge is defined using local space, ie: the x/y position of
the instance is considered (0,0), so this should be taken into
consideration when creating them (in the code example below, the
instance would have been placed at (0,0) in the room to avoid
complications).
var xx = 0;
var y1 = room_height - 100;
var y2 = room_height - 50 - irandom(100);
for (var i = 0; i < 10; i++;)
{
var fix = physics_fixture_create();
physics_fixture_set_edge_shape(fix, xx, y1, xx +
50, y2);
physics_fixture_bind(fix, id);
physics_fixture_delete(fix);
xx += 50;
y1 = y2;
y2 = room_height - 50 - irandom(100);
}
The above code will create a line of "edge" fixtures with a variety of heights over the length of the room.