node->SetPosition()

[xtravanta]

Hi,

Iam trying to update the position of my node.. but for some weird reason it doesn't go to the place iam telling it to go to....

example:

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ISceneNode *Spawn = spawnPoint[nr].Node; // the spawnpoint it needs to spawn on..

player[active].Node->setPosition(Spawn->getPosition());

Spawn->getPosition(); // this gives me a good position

but if i set it to the player node it isnt the correct one.. ( weird thing about this ) the position is never the same when it is set

if i check it before i set the new position it is always the same..

printf("%f,%f,%f\n", Spawn.X,Spawn.Y,Spawn.Z);


so maby somebody has a sollution for this..

Thx..

[pepeshka]

get and setPosition() return co-ords relative to the node's parent - do the player node and the spawn node both have the same parent? Have you tried using the absolute positions?

[ChaiRuiPeng]

this simply sounds like you need to use

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getAbsolutePosition()

[xtravanta]

the player node are add manualy like this

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IMesh *mesh = smgr->getMesh("player.obj");
ISceneNode *node = smgr->addMeshSceneNode(mesh);

and the spawn node is added using a .irr file.

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smgr->loadScene("scene.irr");

after this iam looping over all of the nodes to create a meta selector depending on the type of node..

i dont know if the parent node is the same then.


//edit
getAbsolutePosition() also doesnt work... already tried that..

//edit

getAbsolutePosition() and getPosition() give the same values..

[Mel]

It is highly probable they don't have the same parent node, so try and make sure, or else, set all the parent's position to 0,

Getting the absolute positions will return you the positions in world space indeed, but setting the position will set the position relative to the parent of that node, that is, the real position will be the parent's position + the absolute position of the spawning point.

[xtravanta]

set all the parent's position to 0

uhm.. how ?:P

iam loading it from a irr file and while looping over all of the nodes setting its postion to 0.. this will f*ck up my complete world becuase all of the nodes have there own position in the irr file

and after setting it to 0 all the nodes will be on the same spot..

or do you mean something else ?

[Anthony]

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smgr->addMeshSceneNode( mesh, parentNode, ...more neat initial values to get aquint with :) );

mesh->setParent( parent )

Do you have an IDE with some sort of intellisence, it would be a great help as you can see all overload and default values of functions.

If not, or as second source of information, the source code (F12 in MSVC jumps right to the implementation)gives a lot - if not all - information.

Third or first source of information would be the documentation -> top nav bar -> all options. That will bring you right to the advanced forum. Hmmm, well I haven't been discovered in the advanced forum yet either


EDIT:
An absolute position is the position of the object you call. They are the coord on the scene.

The other position is the relative. It's the position of the object away from the parent.

Thus:

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PSEUDO
parent->setPosition( 1, 0, 2 );

childOfParent->setPosition( 3, 1, 4 );

childOfParent->getAbsolutePosition(); <- returns vector3df( 4, 1, 6 );

childOfParent->setPosition( -3, 1, 4 );

childOfParent->getAbsolutePosition(); <- returns vector3df( -2, 1, 6 );

[xtravanta]

uhm.. i'am not getting it to work... is there a way to force it to (0,0,0) on some way ( just temporarly ) untill i know how it works??

Greetzz

[agamemnus]

but if i set it to the player node it isnt the correct one.. ( weird thing about this ) the position is never the same when it is set

Plz elaborate. This may uncover the reason why you can't get it to work.