Rotate Camera

[crackingod]

Hi!
I want to rotate my camera 90 degrees left or right, but I can't find how to do that, setRotation doesn't seem to work.
Any help?
Cheers

[Saku]

Try using the setTarget - Should work

BTW: Which camera type are you using?

[crackingod]

setTarget doesn't seem to work either.
I'm using addCameraSceneNode()

[Saku]

You sure you got the right pointer?
That camera should have no problems what so ever both rotating and targeting.

[crackingod]

mmm
Well I think I'm doing it right:

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ICameraSceneNode	*camera;

then

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camera	 =	smgr->addCameraSceneNode();

then

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gameCore.camera->setPosition(vector3df(0,500,-250));
gameCore.camera->setTarget(vector3df(0,0,0));

(In fact even the setTarget here doesn't work. setPosition does though

And finnaly in my EventReceiver:

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		case EGET_BUTTON_CLICKED:
			if(id == 101)
			{
			camera->setRotation(vector3df(0,90,0));
			}

[AussieMike]

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camera    =   smgr->addCameraSceneNode();

I believe you can only rotate that camera using the setTarget() function.
How would you know if setTarget(vector3df(0,0,0)) is working or not?
I thought that was the default heading of a camera???,
try setTarget(vector3df(100,500,-250));

I was told setRotation() is only for smgr->addCameraSceneNodeFPS()

http://irrlicht.sourceforge.net/phpBB2/ ... hp?t=13080

[Saku]

Actually the default target of the camera is (0, 0, 100) - according to the docs anyways:

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addCameraSceneNode (ISceneNode *parent=0, const core::vector3df &position=core::vector3df(0, 0, 0), const core::vector3df &lookat=core::vector3df(0, 0, 100), s32 id=-1)=0

[crackingod]

Yup I tried with different values of setTarget() and it doesnt change anything.
Quite weired!
Any idea? Cos I'm quite stuck with my game if I can't rotate my camera (citybuilder, rts like camera which works perfectly well except for zooming and for this)

[crackingod]

Please I really need help on this one...

[Saku]

Are you absolutly 100 % sure that it isnt working?? Cuz sometimes it just seems like it, since "the code works in mysterius way", and sometimes actually does work!
Try debug and check that the values are indeed not changing. Dont just trust your eye on this one!

Anyways, maybe if you could show us your code it would help a bit understanding what you posibly could be doing wrong.
Try pasting you code here: http://pastebin.co.uk/
Then link us with code.

[crackingod]

I can't manage to see their anti spam image so I'll just post it here:

Main:

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#include "CGameCore.h"


int main()
{
	CGameCore gameCore;
	if (!gameCore.GameInit()) 
	{
		return 0;
	}

	IAnimatedMesh* mesh;
	ISceneNode* node;
	gameCore.guienv = gameCore.device->getGUIEnvironment();
	mesh = gameCore.smgr->getMesh("test.3ds");
	node = gameCore.smgr->addAnimatedMeshSceneNode(mesh);

	gameCore.device->setEventReceiver(&gameCore);
	node->setScale(vector3df(2.0f,0.8f,2.0f));
	node->setMaterialFlag(video::EMF_NORMALIZE_NORMALS, true);
	node->setMaterialFlag(video::EMF_LIGHTING, false);

	IGUIImage *map;
	IGUITabControl* tabctrl = gameCore.guienv->addTabControl(core::rect<int>(0,320,640,480),0, true, true);
	IGUITab* optTab = tabctrl->addTab(L"Info");
	IGUITab* aboutTab = tabctrl->addTab(L"Construction");
	map = gameCore.guienv->addImage(gameCore.driver->getTexture("minimap.tga"),position2d<s32>(500,5),true,optTab);
	IGUIButton* button1 = gameCore.guienv->addButton(rect<s32>(30,30,60,60),optTab,101,L"Rotate");


	gameCore.camera->setPosition(vector3df(0,500,-250));
	gameCore.camera->setTarget(vector3df(100,500,-250));

	while (gameCore.GameLoop())
	{	
		gameCore.CameraUpdate();
		gameCore.Render();
	}

	return 0;
}

CGameCore.h

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#ifndef __CGameCore_h__
#define __CGameCore_h__

#include <irrlicht.h>
#include <iostream>

using namespace irr;
using namespace core;
using namespace scene;
using namespace video;
using namespace io;
using namespace gui;
#pragma comment(lib, "Irrlicht.lib")


struct Screen
{
	int X;
	int Y;
};

class CGameCore : public IEventReceiver
{

public:
	IrrlichtDevice		*device;
	IVideoDriver		*driver;
	ISceneManager		*smgr;
	ICameraSceneNode	                *camera;
	IGUIEnvironment		*guienv;
	Screen screen;
	
	CGameCore();
	virtual ~CGameCore(void);
	bool GameInit();
	void Destroy();
	void Render();
	bool GameLoop();
	void CameraUpdate();
	
	
	bool fullscreen;
	int bitdepth;

	virtual bool OnEvent(SEvent event);
private:
	int cursx;
	int cursy;
	vector3df camerapos;

};

#endif

GameCore.cpp

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#include "CGameCore.h"

CGameCore::CGameCore()
{
	fullscreen = true;
	bitdepth = 32;
}

CGameCore::~CGameCore()
{
	Destroy();
}

bool CGameCore::GameInit()
{
	screen.X=640;
	screen.Y=480;
	device	 =	createDevice(EDT_OPENGL, dimension2d<s32>(screen.X, screen.Y),bitdepth,fullscreen,true,true,0);
		if (device == 0) return false;
	driver	 =  device->getVideoDriver();
	smgr	 =	device->getSceneManager();
	camera	 =	smgr->addCameraSceneNode();


	guienv	 =	device->getGUIEnvironment();

	quit = false;
	return true;
}

void CGameCore::Destroy()
{
	if	(device)
	{
		device->closeDevice();
	}
}


void CGameCore::Render()
{
	if	(!device->isWindowActive())	return;
	  driver->beginScene(true, true, 0);

	  smgr->drawAll();

      guienv->drawAll();
      driver->endScene();
}

bool CGameCore::GameLoop()
{
	if (!device->run())
	{
		return false;
	}
	return true;
}


bool CGameCore::OnEvent(SEvent event)
{
	if(event.EventType==EET_GUI_EVENT)
	{
		s32 id = event.GUIEvent.Caller->getID();
		guienv = device->getGUIEnvironment();
		
		switch(event.GUIEvent.EventType)
		{
		case EGET_BUTTON_CLICKED:
			if(id == 101)
			{
			camera->setRotation(vector3df(0,90,0));
				return false;
			}
			break;
		}
	}

	return false;

}

void CGameCore::CameraUpdate()
{
		
	camerapos =  camera->getPosition();

	camerapos.Z += 2;
	camerapos.Y -= 2;

	camera->setTarget(camerapos);

	cursx = device->getCursorControl()->getPosition().X;
	cursy = device->getCursorControl()->getPosition().Y;
	
	float distance = 5.0;

	if (cursx > (screen.X - 40))
	{	
		camerapos = camera->getPosition();				
		camerapos.X += distance;
		camera->setPosition(camerapos);								
	}
	else if (cursx < 40)
	{	
		camerapos = camera->getPosition();				
		camerapos.X -= distance;
		camera->setPosition(camerapos);							
	}
	if (cursy < 40)
	{
		camerapos = camera->getPosition();				
		camerapos.Z += distance;
		camera->setPosition(camerapos);								
	}
	else if (cursy > (screen.Y - 40))
	{	
		camerapos = camera->getPosition();				
		camerapos.Z -= distance;
		camera->setPosition(camerapos);							
	}
	
	
}

Any help?
Thanks a lot

[Saku]

mhm.. Do you think this might have someting to do with your problem:

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void CGameCore::CameraUpdate()
{
camerapos =  camera->getPosition();

camerapos.Z += 2;
camerapos.Y -= 2;

camera->setTarget(camerapos);

...

}

yes?

[crackingod]

I do feel quite stupid here
But I need that bit of code for my mouse moved camera, otherwise it just keeps looking at the target.
I'll have to see how to work around that!
Anyway thanks a lot...what an idiot I am