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Question by Orcka · Jun 06, 2018 at 07:42 PM · c#linerendererevent triggering

How to create a line render that will only start in a specific area.

So I created a line rendering script attached to the camera that creates a line by holding down the left mouse button and then releasing the left mouse button.

However, I want to restrict the player being able to actually create the line, unless they are clicking on top of a sprite (in this case a simple dot on the picture). I was thinking about using an event component on the sprite, but I am not sure how to then link it to the script. Am I approaching the problem incorrectly?

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Answer by tormentoarmagedoom · Jun 07, 2018 at 07:54 AM

Good day.

If I understand, you want the player to be able to create lines, but only if starts from a GameObject?

Then you can use Raycasts. If the raycast is not hitting a object with some specific preoperty o specific tag, the line does not commence.

The event System is also a good was to do it. For example, this objects can change a bool variable at the LineGenerator script to know that you are cliking a object. OR you can make that the line generator script is inside all this objects, so each object generate "their own lines".

Good luck!

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avatar image Orcka · Jun 07, 2018 at 09:41 PM 0
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Thanks!

I solved the problem by adding 2 functions: "On$$anonymous$$ouseOver" and "On$$anonymous$$ouseExit" and creating a Boolean variable called: _overVertex like you said and made it equal to false by default.

I then added to the 2 functions:

   void On$$anonymous$$ouseOver()
     {
         _overVertex = true; 
     }
 
     void On$$anonymous$$ouseExit()
     {
         _overVertex = false;
     }

After that, all I had to do was in the if statement in my update function, I placed another check to see if the _overVertex value was true like so:

  if (Input.Get$$anonymous$$ouseButtonDown(0) && _overVertex == true)

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