Actor.sweep, hit a plane

RedcrowProd · 03-23-2017 05:31 AM

Hey,

here is what i try to do:

Player attacks; if weapon ( like knife ) hit the floor, draw a decal at the location hit.

Following the game basics - "17 - small overlays" tutorial

Code:

PhysHit phys_hit;

   if(Actor.sweep(Actor.pos(), &phys_hit))

   {

      if(phys_hit.group==AG_TERRAIN)

      {     

         Game.World.terrainAddDecal(WHITE, bullet_mtrl_id, Matrix().setPosDir(phys_hit.plane.pos, phys_hit.plane.normal).scaleOrn(0.05));

      }

   }

This code works fine for the collision ( detect at the right time, when touched the floor ) but the issue is the plan pos are at the wrong location.

attached screenshot :

https://gyazo.com/3a5ae6c5b4d5eef5d28a0abac519a8b5

sooo here my questions : is it better to create a fake ray of the lenght of the weapon ?
am i doing something wrong ? or is there another way ?

thanks

**Esenthel** · 03-23-2017 09:41 PM

Hi,

I don't know what is what on the screenshot.

Perhaps the knife weapon actor sweep detects another actor first, and not the ground?

Can you provide a small physics based project that reproduces this issue and I would check what's wrong?

Edit:
forget what I said, I see that your code is wrong.
You pass a wrong parameter to the 'sweep' function, you specify the movement vector as the position?
you should pass the delta movement, something like (0,-0.1,0) or something, you could make it velocity or time dependent.

RedcrowProd · 03-24-2017 02:48 AM

Oh, yes you are perfectly right, this is working fine now with (0,-0.1,0).

smile

thanks for the help

Actor.sweep, hit a plane
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