intersect . . . invisible images

Sannyasin Brahmanathaswami brahma at
Fri Jul 14 16:44:20 CEST 2017

Indeed, I won't list them but I get at least 5 use cases popping into my head the moment I saw this, where one would want the intersection between 1 object and an invisible object 2: 

just one: solution to a puzzle could be invisible. as user moves tiles around the intersect would trigger "got it" for placement.   In fact I am using another algorithm for this very use case where we do stuff like store the loc of the hidden object then on mouse drag check the abs of the loc of the dragged vsibiel object   ….  and I'm thinking think, sheesh… I thinking I could be using intersect instead… 

is intersect expensive on mobile? Performant on Android? 


On 7/14/17, 1:11 AM, "use-livecode on behalf of Mark Waddingham via use-livecode" <use-livecode-bounces at on behalf of use-livecode at> wrote:

    As Lagi pointed out one can imagine that there are use-cases where you 
    want to know whether two things intersect regardless of whether they can 
    be seen (i.e. visible false, or blendLevel 100). Indeed, I don't recall 
    anyone ever commenting on this - so either it was too long ago and I 
    have since forgotten, or it is useful the way it currently is.

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