tutorial on point clouds and polygons

pandoragami · Post by **pandoragami** » Fri Jan 28, 2011 12:53 am

I've been trying to find a good example on using this method for a point cloud

ISceneNode.setMaterialFlag(E_MATERIAL_FLAG.EMF_POINTCLOUD, true).

I also wanted to know how I can draw polygons such as cubes and spheres in 3d.
thanks

Anthony · Post by **Anthony** » Fri Jan 28, 2011 1:12 am

addCubeSceneNode

goes for a sphere too

but what is a pointcloud

EDIT: thanks RaverGames

RaverGames · Post by **RaverGames** » Fri Jan 28, 2011 6:39 am

@random_anonymouse

Pointcloud will render the Vertices of a SceneNode

Bear_130278 · Post by **Bear_130278** » Fri Jan 28, 2011 7:56 am

viceversa

pandoragami · Post by **pandoragami** » Fri Jan 28, 2011 8:17 am

I tried to follow this tutorial http://irrlicht.sourceforge.net/phpBB2/ ... =primitive

and I got this code but theres no cube?

Code: Select all

#include <C:\irrlicht-1.7.2\include\irrlicht.h>


using namespace irr;
using namespace core;
using namespace scene;
using namespace video;
using namespace gui;

/*
IrrlichtDevice* device = createDevice(EDT_OPENGL, core::dimension2d<s32>(640,480));

OpenGL - EDT_OPENGL
DirectX 8 - EDT_DIRECT3D8
DirectX 9 - EDT_DIRECT3D9
Software - EDT_SOFTWARE
Sofware 2 - EDT_BURNINGSVIDEO

IVideoDriver* video = device->getVideoDriver();
ISceneManager* smgr = device->getSceneManager();
*/
int main()
{
 IrrlichtDevice *device = createDevice(EDT_OPENGL);
 IVideoDriver* video = device->getVideoDriver();
 ISceneManager* smgr = device->getSceneManager();

 ISceneNode* cube = smgr->addCubeSceneNode();
 cube->setPosition(vector3df(0,0,0));

 while(device->run() && device)
 {
  video->beginScene(true, true, video::SColor(255,0,0,255));
  smgr->drawAll();
  video->endScene();
 }
}

Sylence · Post by **Sylence** » Fri Jan 28, 2011 8:19 am

Yes there is no camera so you won't see anything

pandoragami · Post by **pandoragami** » Fri Jan 28, 2011 8:22 am

Yes there is no camera so you won't see anything

Oh! Well I guess he could've explained that part in the tut. I'm not sure how to add a camera, could you maybe hack my code to include one?

Nevermind, I just added

Code: Select all

smgr->addCameraSceneNode(0, vector3df(0,30,-40), vector3df(0,5,0));

into

Code: Select all


#include <C:\irrlicht-1.7.2\include\irrlicht.h>


using namespace irr;
using namespace core;
using namespace scene;
using namespace video;
using namespace gui;

/*
IrrlichtDevice* device = createDevice(EDT_OPENGL, core::dimension2d<s32>(640,480));

OpenGL - EDT_OPENGL
DirectX 8 - EDT_DIRECT3D8
DirectX 9 - EDT_DIRECT3D9
Software - EDT_SOFTWARE
Sofware 2 - EDT_BURNINGSVIDEO

IVideoDriver* video = device->getVideoDriver();
ISceneManager* smgr = device->getSceneManager();
*/
int main()
{

 IrrlichtDevice *device = createDevice(EDT_OPENGL);
 IVideoDriver* video = device->getVideoDriver();
 ISceneManager* smgr = device->getSceneManager();

 ISceneNode* cube = smgr->addCubeSceneNode();
 cube->setPosition(vector3df(0,0,0));
 smgr->addCameraSceneNode(0, vector3df(0,30,-40), vector3df(0,5,0));

 while(device->run() && device)
 {
  video->beginScene(true, true, video::SColor(255,0,0,255));
  smgr->drawAll();
  video->endScene();
 }
}

@RaverGames

Do you have any actual code that could help me. I see the point cloud idea better now although I'm lost with what method I use and what parameters are false, etc. A working example or snippet would be fine or just add a couple of lines to my code above, thanks

hybrid · Post by **hybrid** » Fri Jan 28, 2011 8:40 am

You can check out wireframe and point cloud in the terrain example of the SDK. Just press 'w' and 'p' to change modes.

pandoragami · Post by **pandoragami** » Fri Jan 28, 2011 9:15 am

@hybrid

I compiled the source for that and it works but it only does wireframe and no point clouds. Is there a parameter in the code I change for that? What line?

janw · Post by **janw** » Fri Jan 28, 2011 10:15 am

Code: Select all

case irr::KEY_KEY_P: // switch wire frame mode
				Terrain->setMaterialFlag(video::EMF_POINTCLOUD,
						!Terrain->getMaterial(0).PointCloud);
				Terrain->setMaterialFlag(video::EMF_WIREFRAME, false);
				return true;

at this point mate:), look at the tutorial first ( just a suggestion ) before posting such a questions;)

hybrid · Post by **hybrid** » Fri Jan 28, 2011 11:59 am

Also note that not all drivers support point cloud rendering. IIRC, the sw drivers don't support it.

pandoragami · Post by **pandoragami** » Fri Jan 28, 2011 5:04 pm

@janw

at this point mate:), look at the tutorial first ( just a suggestion ) before posting such a questions;)

I didnt know about the tutorial before asking.

@hybrid

thanks it works now, used opengl though, thats the only driver that did work.

hybrid · Post by **hybrid** » Fri Jan 28, 2011 5:07 pm

What? How did you compile sources without knowing about it?

random_anonymouse wrote:I compiled the source for that and it works but it only does wireframe and no point clouds. Is there a parameter in the code I change for that? What line?

pandoragami · Post by **pandoragami** » Fri Jan 28, 2011 5:13 pm

What? How did you compile sources without knowing about it?

I just compiled the sources I didnt look at the code itself. I also didnt know the terrain tutorial had point clouds.