Lazer Ray?

[Marcousik]

Hey people,

Does anybody has an idea how to cast a laser ray ingame, (without getting out of memory ) ?

"simple" thing like this, something you see in so much games, well, how to make this with Leadwerks ? thx

[gamecreator]

You can create a 1-unit long cylinder with its origin/pivot on one end.  Position it to the muzzle.  Then Point it at a target and scale it out with the distance between the two points.  That's how I did it in one of my tournament attempts.

Edit: found the code at home.  Looks like I already had the laser parented to the robot.  The rest just looked like this (after finding the closest rock in an array of rocks):

Vec3 rp = rock[closestrockindex].model->GetPosition(true);
player.laserblue->Point(rp.x, rp.y+0.8, rp.z, 2, 1, 0);
player.laserblue->SetScale(0.4, 0.4, player.laserred->GetDistance(rock[closestrockindex].model) / 10);

 

[Marcousik]

That's nice thx

[Josh]

I would use two sprites, one for the beam and one for the end point.

[gamecreator]

8 hours ago, Josh said:

I would use two sprites, one for the beam and one for the end point.

This is another set of functions that could use at least a single example in the docs.  And a laser between a box and a sphere would probably be the perfect example.

[Marcousik]

So yes using sprites allow more "lighting" effect around the lazer.

And if I understood this right, then you have to place the sprite in the middle of the way between startpoint and endpoint, then align it in th e right direction, and finally set the distance as size.

For this Jen you are using the pythagorean theorem in 3D am I right ? Maybe using DistanceToPoint() may be good too

https://www.leadwerks.com/learn?page=API-Reference_Object_Math_Plane_DistanceToPoint

[Einlander]

https://www.leadwerks.com/community/topic/15771-beam-class/

 

[Thirsty Panther]

There is a laser.lua script in the following thread which might help.

 

[Marcousik]

thx. This should be uploaded in the workshop !

Edit

here are the links:

https://www.leadwerks.com/community/topic/15771-beam-class/

https://www.leadwerks.com/community/topic/13275-help-with-trip-wires/?tab=comments#comment-93679