1 simple question about camera position

[charles88]

Hi, can someone please tell me whether the setPosition() is working with camera? because currently I try to set the camera position and move it with my node, but only the setTarget is working.

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cam->setPosition(node->getPosition+vector3df(0,20,-50));
cam->setTarget(node->getAbsolutePosition());

Thanks.

[JP]

How is it not working? The camera doesn't move at all?

Do you have the node parents to the camera, or vice versa?

[jontan6]

maybe u have collision detection on camera...

[skumar]

i also had same problem with set position , when collision detection is enabled...why that happens...

What if i want to set the cam to a specific point?

[Acki]

i also had same problem with set position , when collision detection is enabled...why that happens...

well, I assume you're trying to move the node through an obstacle, but that doesn't work because of the collision detection...
with collision detection you cant move through obstacles !!!

[rogerborg]

We've discussed this before.

Crib notes: you can work around it on the SVN trunk, but on 1.4.X, you have to remove the collision animator and create and attach a brand new one each time you move the camera manually. Bummer, eh?

If you feel like raising a bug against it in the tracker, maybe one of those lazy Irrlicht devs might add some new functionality to 1.4.3 / 1.5 to solve this problem.

[charles88]

@JP:
Yeah, the camera doesn't move (which suppose to move), but the target is on the node (which is correct). And I want to update the camera position without parenting it to the node. Is there any way for that? I've put

Code: Select all

cam->setPosition(node->getPosition+vector3df(0,20,-50)); 
cam->setTarget(node->getAbsolutePosition()); 

before

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smgr->drawAll();

But still doesn't work.

@jonta6:
No, there is no collision detection. I don't add one anyway, I just want to simply make my camera follow my node when I move the node without parenting.


@rogerborg:
I think that thread and mine are different.

Thanks guys for your response.

But what I really want to know is that, does the setPosition() work on camera? Because for me it is not working "correctly".

I doesn't mean that the setPosition() is not working completely, but just that when I change my node and according to the code above the position of the camera should change to right?

[JP]

Your code should work fine, so long as your lack of () on node->getPosition is a typo rather than something you've left out in your code. I'm assuming it's a typo because any compiler shouldn't allow that but if you're using some crappy compiler that's allowed it that could be your problem and if so i'd suggest using a better compiler!

[rogerborg]

Code: Select all

cam->setPosition(node->getPosition+vector3df(0,20,-50)); 
cam->setTarget(node->getAbsolutePosition()); 

On the offchance that your node's relative position isn't changing, I'd do:

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const core::vector3df nodePosition = node->getAbsolutePosition();
cam->setPosition(nodePosition + vector3df(0,20,-50)); 
cam->setTarget(nodePosition);

You may want to slap updateAbsolutePosition() around willy nilly (if doing anything willy nilly is legal in your jurisdiction).

[charles88]

@JP: Yeah, that's a typo I'm using the default compiler.

@rogerborg: thanks rogerborg, but still didn't work for me. I think nvm, in that case I just attach my camera to my node. sigh...

[jontan6]

can you post your whole code? maybe there's something in it that causes the prob