intersect . . . invisible images

J. Landman Gay jacque at
Fri Jul 14 20:51:12 CEST 2017

On 7/14/17 12:22 PM, Richmond Mathewson via use-livecode wrote:
> If intersect looks for existence rather than appearance why does it tale 
> transparency levels into consideration?

That just exchanges the dimensions of the object rectangle for the 
position of its "visible" outline. It is still checking for 
position/existence -- the existence of visible pixels.

The ability to check for the actual position of the object outline is a 
newer addition; the original intersect function only looked at the 
object rectangle. Likely the addition of the visible pixels parameter, 
which is very useful, confuses the concept which is still purely positional.

Jacqueline Landman Gay         |     jacque at
HyperActive Software           |

More information about the use-livecode mailing list