Re. Creating an array of mesh nodes is it possible

[DGENXP]

Hi I am trying to creat an array of scene nodes as in name[amt] but i cannot get this working

the reason i want this is because i am working on an aplication which will generate alot of these models

if there is any ideas i would like to know - I did see that somebody has done this on the forums but he has not released his code to look at

Cheers

[Baal Cadar]

What exactly were you trying? (Code snippet) And what exactly was the error you were getting? (Exact compiler messages)
Also state your compilation environment and used Irrlicht version.

You might consider using irr::core::array or std::vector or some other container instead of C style arrays. They are *much* easier to use, dynamically growing and just as fast.

[DGENXP]

Hi I hope this helps

when i try this it crashes before it even starts i have tried another method but this just places the object without a texture

I am using Dev C++ and IRR Version 0.12.0 with directX Support

Code: Select all

	IAnimatedMesh* mesh = smgr->getMesh("Objects/floor.x");
	IAnimatedMeshSceneNode* node[1] = {smgr->addAnimatedMeshSceneNode( mesh )};
	

	if (node[1])
	{
		node[1]->setMaterialFlag(EMF_LIGHTING, false);
		node[1]->setPosition(vector3df(128-256,0,78));
	//	node->setFrameLoop(0, 310);
		node[1]->setMaterialTexture( 0, driver->getTexture("Objects/Floor09.jpg") );
	}

I shall look forward to reading the solution

[bitplane]

no need for the curly braces.

[DGENXP]

no need for the curly braces.

I have tried it without and it does not compile

it says invalid initializer

[ElementoY]

Arrays in C++ start from index 0, not 1, so an array with size 1 would have only the index 0, so to access it you'll need to change all references to node[1] to node[0] .
Hope it helped!

[ElementoY]

This would be the fixed-up code:

Code: Select all

	IAnimatedMesh* mesh = smgr->getMesh("Objects/floor.x");
	IAnimatedMeshSceneNode* node[1];
        node[0] = smgr->addAnimatedMeshSceneNode( mesh ) ; // no need for braces here
	

	if (node[0])
	{
		node[0]->setMaterialFlag(EMF_LIGHTING, false);
		node[0]->setPosition(vector3df(128-256,0,78));
	//	node[0]->setFrameLoop(0, 310);
		node[0]->setMaterialTexture( 0, driver->getTexture("Objects/Floor09.jpg") );
	}

[DGENXP]

It worked at the 0 point but when i tried to add more it crashes

[ElementoY]

Try giving the array more elements, like in:
IAnimatedMeshSceneNode* node[x];
where x is the number of elements you want in the array.

[DGENXP]

Hmm nope it still crashes

[DGENXP]

Hmm nope it still crashes

[bitplane]

d'oh! like Baal said, you should try using core::array instead because its much easier to use. I thought creating an array like x[3] = {a,b,c} makes constants, i dunno, anyway they're awkward and you cant 'redim' them.

Code: Select all

core::array<scene::ISceneNode*> aNodes;
aNodes.set_used(total);
aNodes[0] = smgr->addFooSceneNode();
...
aNodes[total-1] = smgr->addFooSceneNode();

[Baal Cadar]

Or using std::vector (would be similiar with irr::core::array)

Code: Select all

#include <vector>
using namespace std;

//...snip...
IAnimatedMesh* mesh = smgr->getMesh("Objects/floor.x");

vector<IAnimatedMeshSceneNode*> nodes;
// Creating five of them:
for (int i = 0; i < 5; ++i)
{
   nodes.push_back(smgr->addAnimatedMeshSceneNode(mesh));
}
   
// Initialise the created nodes
for (size_t i = 0; i < nodes.size(); ++i)
{
      nodes[i]->setMaterialFlag(EMF_LIGHTING, false);
      nodes[i]->setPosition(vector3df(128-256,0,78));
      nodes[i]->setMaterialTexture( 0, driver->getTexture("Objects/Floor09.jpg"));
}

Using C style arrays in this context is just inflexible and troublesome. Prefer full functional containers like STL containers or the ones Irrlicht provides.

[ElementoY]

Using C style arrays in this context is just inflexible and troublesome. Prefer full functional containers like STL containers or the ones Irrlicht provides.

True indeed! I forgot about Irrlicht's containers...

[afecelis]

and... where is the array part?