drawing a text(SOLVED)

[MasterM]

Hey guys, how do i draw a text on a model?for example infront of a cube saying "cube"...i tried

Code: Select all

guienv->addStaticText(L"Cube",core::rect<s32>(480,445,630,465),false);

but it displays the text on the screen but i want to place the text on the model...but i dont know what to do can anyone help me?
Thanks in advance.

[frostysnowman]

On the model? For that, you want to use a texture. addStaticText() will add a 2d static text on the screen.

[MasterM]

No no, not on the texture i mean like make a text and place it infront of the model like this for example notice how the cube text is infront of the man model...how do i make a text apear infront of a model like that?

[hybrid]

In case your model is also drawn with 2d methods or GUI elements you can just aling the positions. If you want to do this for 3d models, you have to use a 3d text node. Best option is the TextBillboardSceneNode, which you can simply parent to the model and the text will move together with the model.

[MasterM]

hmmm i gave a shot at addBillboardTextSceneNode using the following parameters :

Code: Select all

 ISceneNode *test=smgr->addBillboardTextSceneNode(0,L"TESdfgdfgdfgdsgsaadT",0, core::dimension2d< f32 >(10.0f, 10.0f),sars->getPosition()+vector3df(0,0.5,0),0, 0xFFFFFFFF, 0xFFFFFFFF);

But i dont see nothing, what am i doing wrong(i never used this function before so i may be doing something horribly wrong)
Thanks in advance.

[vitek]

The declaration for the method you are calling is...

Code: Select all

  832 		virtual IBillboardTextSceneNode* addBillboardTextSceneNode( gui::IGUIFont* font, const wchar_t* text,
  833 			ISceneNode* parent = 0,
  834 			const core::dimension2d<f32>& size = core::dimension2d<f32>(10.0f, 10.0f),
  835 			const core::vector3df& position = core::vector3df(0,0,0), s32 id=-1,
  836 			video::SColor shade_top = 0xFFFFFFFF, video::SColor shade_down = 0xFFFFFFFF) = 0;

The documentation provided doesn't say this, but that method will do nothing if the font parameter is NULL. You should also pass your scene node pointer as the third parameter. That way the text will move with the mesh.

The following code should get something to appear on your screen...

Code: Select all

scene::ISceneNode* cube = smgr->addCubeSceneNode(10.f);

gui::IGUIFont* font = gui->getFont("../../media/fontlucida.png");
if (!font)
  font = gui->getBuiltInFont();

scene::IBillboardTextSceneNode* cube_name = smgr->addBillboardTextSceneNode(font, L"Cube", cube);
cube_name->setPosition (core::vector3df(0.f, 10.f, 0.f));

Travis

[rogerborg]

The documentation provided doesn't say this, but that method will do nothing if the font parameter is NULL.

As of SVN 1798, we use the default GUI font if none is specified. Thanks for pointing this out.

[MasterM]

The documentation provided doesn't say this, but that method will do nothing if the font parameter is NULL. You should also pass your scene node pointer as the third parameter. That way the text will move with the mesh

Thanks, i figure it had something to do with the font tho but did not know how fonts work(until now).
Well i did a test and this is what i got :
its good and all but does anyone know how to make the text transparent(the black parts)
Thanks in advance.

[MasterM]

Can someone help me with this, i been trying and trying and still no results.

[Acki]

its good and all but does anyone know how to make the text transparent(the black parts)

it works like expected for me:


using Irrlicht v1.4.2 (OGL and DX9) with this code:

Code: Select all

#include <irrlicht.h>
using namespace irr;
using namespace core;
using namespace scene;
using namespace video;
using namespace io;
using namespace gui;

int main(){
  IrrlichtDevice *device = createDevice(EDT_DIRECT3D9);
  IVideoDriver* driver = device->getVideoDriver();
  ISceneManager* smgr = device->getSceneManager();
  IGUIEnvironment* guienv = device->getGUIEnvironment();

  IAnimatedMesh* mesh = smgr->getMesh("media/sydney.md2");
  IAnimatedMeshSceneNode* node = smgr->addAnimatedMeshSceneNode( mesh );
  node->setMaterialFlag(EMF_LIGHTING, false);
  node->setMD2Animation ( EMAT_STAND );
  node->setMaterialTexture( 0, driver->getTexture("media/sydney.bmp") );

  IGUIFont* font = guienv->getFont("media/fontlucida.png");
  if (!font) font = guienv->getBuiltInFont();
  ITextSceneNode* cube_name = smgr->addBillboardTextSceneNode(font, L"Cube", node);
  cube_name->setPosition (vector3df(0.f, 10.f, 0.f));

  smgr->addCameraSceneNodeFPS();
  while(device->run()){
    driver->beginScene(true, true, SColor(255,100,101,140));
    smgr->drawAll();
    guienv->drawAll();
    driver->endScene();
  }
  device->drop();

  return 0;
}

[MasterM]

Stupid me, i forgot to change my device type to OPENGL (it was software)
No wonder, i was starting to get blue when the error was right there.
Thank you very much.