About Trigger Areas

Questions
1

Hi everyone…

I’m using a lot of trigger area in my project. I have to create one more, but how can i do that, i haven’t got any idea.

I already created so many trigger area but those areas shapes are like square. But now i need like “L” one.

My question is; how can i combine two diffrent trigger area or how to a trigger area has the special shape like “L”.

thanks in advance…

2

A simple PG with one square trigger area would be very helpful for me, and maybe others, to understand what you mean by trigger area.

3

You can see in my PG sample

https://www.babylonjs-playground.com/#18CGS5#5

And what i need like a “L” shape

corner

4

I suppose you could change the code and allow a triggerArea to consist of multiple squares.
like so; (added small gap for illustration)

1 Like
5

Yes, but in this time character when enter the trigger area triggers will triggerred more thaan one time?

6

It seems that by trigger area you mean an area defined by a number of points and then you want to find if a given point is inside the area. This is not really a BabylonJS issue but a mathematical one. One way to do it is described here Point in polygon - Wikipedia.

On looking at your playground code it appears you are using trigger volumes not areas, the above ray casting idea above can be extended as described in https://www.doc.ic.ac.uk/~dfg/graphics/graphics2008/GraphicsLecture04.pdf

In future questions, unless the question is specifically about problems after importing a mesh, it would help us to answer the question if you created simple mesh shapes to illustrate your issue rather than importing from a file. This cuts out irrelevant problems.

Good luck with your project.

1 Like
7

@Buzul

I didn’t say make two triggers, but allow a single trigger to have multiple areas.

--Now 
triggerArea.min: {} 
triggerArea.max: {}

--Solution
triggerArea.areas = [];
triggerArea.areas[0] = {min: {}, max: {}}
triggerArea.areas[1] = {min: {}, max: {}}

--And trigger checking code..
for(var i = 0, max = triggerAreas.length; i < max; i++){
  var trig = triggerAreas[i];

   for(var j = 0; j < trig.areas.length; j++){
     var area = trig.areas[j];
     // We now have multiple areas for the same trigger.
   }

}
1 Like
8

Thank you i think this will helps me…