I have problem about draw2DImage to be health bar.

[fon3m]

I use draw2DImage to draw jpg file to be health bar. I use this code

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irrDevice->getVideoDrv()->draw2DImage(test1,::position2d<s32> (0,speed),core::rect<s32>(0,0,200,15), 0, video::SColor(255,255,255,255), true);

and When health bar decrease, it's draw new pic that shorter above the old health bar.
How to delete the old health bar?

Thank you

[Acki]

You don't have to draw a new bar !!!
Just make the rect shorter (dependant on the health), that should do the trick...

[JP]

Yeah with this code it just draws the specified image every frame, for that frame only, it doesn't leave any image on screen after the frame has passed like an IGUIImage woulda, so as Acki says just decrease the size of the rectangle and it should show up smaller on the screen.

[fon3m]

ummmm.......Please show me for sample. I don't understand.

thank you very much

[raven_coda]

Here's code from my program on how I did something similar

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// setup
m_Energy = GUIEnv()->addImage(irr::core::rect< irr::s32 >(765,200,780,400));
	m_Energy->setImage(driver()->getTexture("bar.png"));
	

// in main loop
int hi=(int)(400-(pRacer.energyleft/pRacer.totalEnergy)*200);
	m_Energy->setRelativePosition(core::rect<s32>(765,hi,780,400));
  

[fon3m]

I will try it.

Thank you

[fon3m]

I try with this code

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void textS::drawText(getDevice* irrDevice,int p)
{  	
       text1 = irrDevice->getGUIEn()->addImage(irr::core::rect<irr::s32>(10,10,140,140));
       text1->setImage(irrDevice->getVideoDrv()->getTexture("media/artwork/t1.jpg"));
      
       if(pow==30)   // main set pow=30
       {
           text1->setRelativePosition(core::rect<s32>(10,10,100,100));
       }
}

and it's have 3 error are

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error C2440: '=' : cannot convert from 'class irr::gui::IGUIImage *' to 'class irr::gui::IGUIEnvironment *'
        Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast
error C2039: 'setImage' : is not a member of 'IGUIEnvironment'
        c:\program files\microsoft visual studio\vc98\include\iguienvironment.h(45) : see declaration of 'IGUIEnvironment'
 error C2039: 'setRelativePosition' : is not a member of 'IGUIEnvironment'
        c:\program files\microsoft visual studio\vc98\include\iguienvironment.h(45) : see declaration of 'IGUIEnvironment'

I don't know how to fix it. I look over in doc of irrlicht engine but i don't understand. Please help me and sorry about my stupid.

[raven_coda]

is text1 declared as a IGUIImage* ? If not it should be.

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IGUIImage* text1=0;

[fon3m]

Oh! I can do it. Thank you.