Moving Collison boxes

[Collegia Titanica]

I'm very new to this, just started learning like 2 weeks ago, I've nearly completed my unit and it's exactly as I planned, with the exception of hitboxes.

Since it's a rectangular object, I need additional boxes spawned in the front and back. IT works for a non-moving object perfectly, as the invisible squares and the original model size matches the visual quite nicely.

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		TNT1 A 0 A_SpawnItemEx("Collision", 54, 0, 0, 0, 0, 0, 0, SXF_NOCHECKPOSITION)
		TNT1 A 0 A_SpawnItemEx("Collision", 0, 0, 0, 0, 0, 0, 0, SXF_NOCHECKPOSITION)
		TNT1 A 0 A_SpawnItemEx("Collision", -54, 0, 0, 0, 0, 0, 0, SXF_NOCHECKPOSITION)

However, I need the same but on a moving target. I've briefly skimmed over the forum, and have seen this response which is kind of unclear to me :

"Spawning something every frame? What is this, the ice age? The collider would be spawned only once, storing its "spawner" in a pointer. ZScript lets you do this stuff conveniently. Yeah, sure the actor count would go up, but you don't have to spawn something every frame is my point."

So how do I go about this ? Can anyone guide me or even write something which I can add to my actor ?

Another question: How can I make these collision boxes be ... well ... sensitive ? Like damaging them damages my actor ( because if the projectiles hit from behind or front, they crash into the coll box and the actor is undamaged)

[Matt]

I should probably put up a ZScript tutorial for this, but in the meantime I think one can piece together an answer (and I say a better answer than what's been posted on these forums so far) by getting familiar with the following:

pointers
Tick()
Vec3Angle()
SetOrigin()
DamageMObj()
CanCollideWith()

[Matt]

Hope this helps!

[Collegia Titanica]

@Matt

Thank you mortal. I will resume my work when I can, in the meantime, where is the best place to post about my small project/model ? It's like 85% done, just need collision and some texture change. A video demonstration will be made, you're all gonna love it.

[Collegia Titanica]

Hope this helps!

OK so I've been trying and failing with this. Perhaps this isn't a zscript format problem, as my actor is written in DECORATE, or I have no idea what I'm doing. I've created a ZScript format text file and tested the code.I tweaked the parameters, and it blocks the damage as intended. It would be better if this code was not relative to the mouselook, like whether you look up or down, the hitbox is always in front of you.

All this is for a moving vehicle btw.

If I change the ExampleShieldGiver to an actor and pickoff to a spawn, and then I try to summon the actor ...GZDOOM freezes. I just tried to

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TNT1 A 0 A_GiveToTarget("ExampleShieldGiver")
And
TNT1 A 0	A_SpawnItemEx("ExampleShield", 0, 0, 0)

in the spawn state of my decorate actor but it did nothing.

Firstly I don't know how to connect the 2 entities.
Secondly I also need collision on this, but it's very messed up, I've tried with +SOLID and the results were horrible. All this is so confusing, I just wanted a quick fix ... 2 invisible boxes that end where the moving model ends so it can collide properly with everything and can take damage (

[TheZombie]

Open up the latest build of BD and check out the scripts for the Tanks, helicopters and Mechs.

[Collegia Titanica]

That's exactly what I've done/am doing, my unit is ready, however it's a rectangle, the BD examples are box shaped. I guess I'll keep trying