On 29/03/2018 00:19, Alain wrote:
> Le 18-03-27 à 16:33, Stephen a écrit :
>> On 27/03/2018 20:04, Alain wrote:
>>> Le 18-03-27 à 05:28, Sven Littkowski a écrit :
>>>> Thanks. I heard about that function, but have problems to handle it.
>>>>
>>>> But never mind, I have all coordinates of the entire scene in my 
>>>> mind. I
>>>> find it difficult to learn to work with so-called WYSIWYG editors, I
>>>> hand-code everything. :-)
>>>>
>>>> ---
>>>> Diese E-Mail wurde von AVG auf Viren geprüft.
>>>> http://www.avg.com
>>>>
>>>
>>> You mostly need to remenber that trace(object, start, direction) use 
>>> a start location and a direction. If you change the last value, 
>>> you'll trace in different directions.
>>>
>>> trace(Deck, <PosX, 1000, PosZ>, -y)
>>
>>
>> Even I can use it. ;-)
>>
>> Use PosX, PosZ to describe a grid with a loop. And check that
>>    (vlength (Norm)!=0) and do some stuff
>>
>>
>> Hmm! I had an extra variable:
>>
>> #declare Inter = trace (Trace_object_,< Pos_x, Pos_y, Pos_z >, z, Norm);
>>
>> #if (vlength (Norm)!=0)
>>
>>
>> Then do some stuff.
>>
>> #end
>>
>>
>> Alain probably knows and uses a more efficient way of coding it than I 
>> do/can.
>>
>>
> 
> If you can be reasonably sure that all your start points are over the 
> target object, then, you can omit the normal parameter.
> But, yes, taking the normal into account is normally preferable.


Thanks for the tip. :-D

-- 

Regards
     Stephen

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