creating HUD destroys performance

[GundamO]

okk, so the last thing i need to create for my game is my Heads Up Display to show health and collectables. at the moment i have created a class which will draw heart images depending on how much health you have, the only problem i have is that it drops my fps from about 50 - 80 down to 8 - 20. my question is, is there any way to add my HUD without the drop in fps?

Code: Select all

#include "HUD.h"
#include "Engine.h"


HUD::HUD(video::IVideoDriver *driver,gui::IGUIEnvironment *guienv,Character* turtle1)
{
	turtle=turtle1;

	float width= driver->getViewPort().getWidth();
	float height = driver->getViewPort().getHeight();
	heart = driver->getTexture("media/heart.png");
	heart2 = driver->getTexture("media/heart2.png");

	guienv->addImage(driver->getTexture("media/irrlichtLogo2.png"),position2d<int>(width - 130 ,height - 130));
	//guienv->addImage(driver->getTexture("media/hud.png"),position2d<int>(10,10)); 

	guienv->addImage(heart,position2d<int>(55,10));
	guienv->addImage(heart,position2d<int>(110,10));
	guienv->addImage(heart,position2d<int>(165,10));
	guienv->addImage(heart,position2d<int>(220,10));
	guienv->addImage(heart,position2d<int>(275,10));
}
void HUD::Update(float frameDeltaTime,video::IVideoDriver *driver,gui::IGUIEnvironment *guienv)
{
	if(turtle->Health <= 80)
		guienv->addImage(heart2,position2d<int>(55,10));
	if(turtle->Health <= 60)
		guienv->addImage(heart2,position2d<int>(110,10));
	if(turtle->Health <= 40)
		guienv->addImage(heart2,position2d<int>(165,10));
	if(turtle->Health <= 20)
		guienv->addImage(heart2,position2d<int>(220,10));
	if(turtle->Health <= 0)
		guienv->addImage(heart2,position2d<int>(275,10));
}

HUD::~HUD(void)
{
}

to call it

Code: Select all

HUD* hud = new HUD(driver,guienv,turtle);  

finally, within the device->run()

Code: Select all

float Lasthealth = -1.f;
			float health = turtle->Health;

			if(Lasthealth != health){
				hud->Update(frameDeltaTime,driver,guienv);
				Lasthealth = health;
			}

Thanks for any help

[serengeor]

Gui really drops fps if you add anything, but it shouldn't drop that much.
I think you are having problems because you are adding images to gui every time you health changes(and in constructor).

Instead you should hold pointers to your Images and make them visible/invisible.

[GundamO]

Thanks alot, it worked perfectly, now it only drops to about 40 - 60 fps

Code: Select all

#include "HUD.h"
#include "Engine.h"


HUD::HUD(video::IVideoDriver *driver,gui::IGUIEnvironment *guienv,Character* turtle1)
{
	turtle=turtle1;

	float width= driver->getViewPort().getWidth();
	float height = driver->getViewPort().getHeight();
	heart = driver->getTexture("media/heart.png");

	guienv->addImage(driver->getTexture("media/irrlichtLogo2.png"),position2d<int>(width - 130 ,height - 130));
	//guienv->addImage(driver->getTexture("media/hud.png"),position2d<int>(10,10)); 

	heart1 = guienv->addImage(heart,position2d<int>(55,10));
	heart2 = guienv->addImage(heart,position2d<int>(110,10));
	heart3 = guienv->addImage(heart,position2d<int>(165,10));
	heart4 = guienv->addImage(heart,position2d<int>(220,10));
	heart5 = guienv->addImage(heart,position2d<int>(275,10));
}
void HUD::Update(float frameDeltaTime,video::IVideoDriver *driver,gui::IGUIEnvironment *guienv)
{
	if(turtle->Health <= 80)
		heart5->setVisible(false);
	if(turtle->Health <= 60)
		heart4->setVisible(false);
	if(turtle->Health <= 40)
		heart3->setVisible(false);
	if(turtle->Health <= 20)
		heart2->setVisible(false);
	if(turtle->Health <= 0)
		heart1->setVisible(false);
}

HUD::~HUD(void)
{
}

[/quote]