Collision?

[ant0N]

Hi!
How it works the function onCollision_Start()?
I need a function that is called when the collision of an entity and returns them to the ID

[SolarPortal]

[ant0N]

thank you SolarPortal, but it's not quite what I need...
I need a script entity1 receive id of all entity, with which he is faced.

[StarFire]

Hey antON, if you can provide me an example of how you would like to use the feature and I will have a look at adding it for you

[ant0N]

thank you very much NightHawk!!
I suggest to do a command like this:
id = entity.collision(objID)
returns the ID of the entity with which the collision
like the getLastHitEntityID()

I am ready to discuss...

[StarFire]

Ok ,the existing onCollision_Start(hitID) does what I think you are after

The onCollision_Start(hitID) callback gets called when the entity with this script collides with any rigid body or any body collides with it. This is a common way of doing collisions in pro engines.

When a collision happens with this entity , the entity with the script has its onCollision_Start(hitID) called and the id of the colliding object is passed as the arg hitID.

Doing it this way is very performance friendly, fast and easy to manage, especially for large fast paced games.

Also you don't have to use the micro script on the rigid body the onCollision_Start event is available in the main script ( as long as the object the script is attached to has a rigid body action).

The event callback is better than doing this check in the main game loop

[ant0N]

thanks again! I will deal

[StarFire]

If you get stuck we are here to help you

[ant0N]

first you need to watch the video to understand what it was about.

I have two objects - ENTITY 1 and ENTITY 2.
object ENTITY 2 creates a new sphere every 2 seconds and sends them to the object of the ENTITY 1.
Object ENTITY 1 creates a larger sphere...
Question: how does the micro script object ENTITY 1 find out the ID of each small sphere in a collision?

PS. tried to do through triggers, through raycast and collision_start()... nothing happens

[StarFire]

Thanks antON, I don't think there is a direct solution for what you are asking. This is due to the objects that are being spawned, the micro script does not see the new objects as it only reads events from the object that it is attached to.

But there is another way you can do this!

All collisions require that the object has a rigid body. It is this rigid body that acts as the bounds for the collision. The onCollision() event is called by each of these objects as their bounds contact with another rigid body.

Each spawned object needs to have a rigid body. Next we need to spawn a lua script file with this new object. To use your example:

Entity 1: spawns sphere and then attaches a lua script to it. This script has to be a script file as there is currently no way to spawn a micro script. The script file for entity 1 contains the collision event so we can detect who has collided with it. Then each time this event is called check the arg hitID to see which object collided with it.

Hope this helps

[ant0N]

thanks for the help NightHawk!!! I realized that I need to do
I will write when I get to do it.

[StarFire]

[ant0N]

doesn't work ... Where is the mistake?

[StarFire]

I will try to recreate your project, if possible can you send me a zip of your scene and any external script files.

I am sure, together we can get it to work

[ant0N]

here's my project. I will be very grateful for help.

[SolarPortal]

after playing with your project, we believe there are a few commands you require that dont exist yet, which we will implement for the next release.

* physics.enableOnCollideStart(id, true); -- For enabling the onCollision_Start(hitID) event on the selected object.
* physics.enableOnColliding(id, true); -- For enabling the onCollision_Stay(hitID) event on the selected object.
* physics.enableOnCollideEnd(id, true); -- For enabling the onCollision_End(hitID) event on the selected object.

Note: In the scene settings panel, check the debug physics property to display physics meshes in the scene, then you will see the below comments meaning.

In your project scene, i noticed that you were moving the object using entity.move();
because it is a physics mesh you wish to move, you need to use the command physics.setVelocity(bID,0,0,10);
This will then move the entity with the physics mesh.

Another note: it is wise to grab the id of the physics body when you call physics.addBody(); e.g.

bID = physics.addBody(e.mesh,1,1)
physics.setVelocity(bID,0,0,10);

Physics properties work from the physics body ID.

Another noted problem: The large ball could not have the dynamic flag set to static when physics.addBody() is called.
This will be checked out aswell.

Thanks anton for helping improve the lua libraries.

[ant0N]

[ant0N]

when will the next update? I can't wait to continue the work on their project....

[StarFire]

We hope to start the code freeze next week and try to get a release soon after

[StarFire]

[ant0N]

Hi, NightHawk! Thank you for helping me!!!

[ant0N]

[ant0N]

why is it so? http://www.youtube.com/watch?v=ixVqVtO0 ... e=youtu.be

[StarFire]

[ant0N]