Lots of errors

[tomtetlaw]

It doesn't work, they all spawn, but they're are not spawning in the right position, they are all in a line in front of the player.

[vitek]

Funny. The code works correctly for me.

Code: Select all

#include <string.h>   // for strcmp
#include <stdlib.h>   // for rand

#include <irrlicht.h>
using namespace irr;

#ifdef _IRR_WINDOWS_
#  pragma comment(lib, "Irrlicht.lib")
#endif

f32 random_f32(f32 n, f32 x) 
{ 
   const f32 r = 1.f * ::rand() / RAND_MAX; // 0 to 1 
   return ((x - n) * r) + n; 
} 


int main()
{
  IrrlichtDevice *device = createDevice(video::EDT_OPENGL, core::dimension2d<s32>(640, 480), 16);
  if (!device)
    return 1;

  video::IVideoDriver* driver = device->getVideoDriver();
  scene::ISceneManager* smgr = device->getSceneManager();

  scene::ISceneNode* player = smgr->addSphereSceneNode(10.f);
  player->setPosition(core::vector3df(100.f, 10.f, -70.f));
  player->updateAbsolutePosition();

  scene::ICameraSceneNode* camera = smgr->addCameraSceneNodeFPS();
  camera->setTarget(player->getAbsolutePosition());

  struct Zombie
  {
    scene::ISceneNode* Node;
  };

#define ZOMBIE_COUNT 400

  Zombie tZombies[ZOMBIE_COUNT];
  for (u32 i = 0; i < ZOMBIE_COUNT; ++i)
  {
    tZombies [i].Node = smgr->addCubeSceneNode();
    tZombies [i].Node->setMaterialFlag(video::EMF_LIGHTING, false);
  }

  for (u32 nZombie_counter = 0; nZombie_counter < ZOMBIE_COUNT; ++nZombie_counter)
  {
    scene::ISceneNode* zombie = tZombies [nZombie_counter].Node;

    core::vector3df rot (0.f, random_f32(0.f, 360.f), 0.f);
    zombie->setRotation(rot);
    zombie->updateAbsolutePosition();

    core::vector3df pos (0.f, 0.f, random_f32 (100.f, 200.f));
    zombie->getAbsoluteTransformation().rotateVect(pos);

    // assumes that zombie nodes are not children of some other node
    zombie->setPosition(player->getAbsolutePosition() - pos);
  }

  while(device->run()) 
  { 
    if (driver->beginScene(true, true, video::SColor(0,200,200,200))) 
    { 
      smgr->drawAll(); 

      driver->endScene(); 
    } 
  } 

  device->drop();

  return 0;
}

The above code produces the following...



Travis

[tomtetlaw]

its wierd because when i run ur code it works but when i run that same code, but in the update method with my other code, it doesn't

this is my update method(with your code):

Code: Select all

void api::C_MainController::Update()
{
	if(nZombie_counter >= MAX_ZOMBIES)
		nZombie_counter = 0;

	//if((int(api::uElapsedTime) % 100) == 0)
	//{
		if(!tZombies[nZombie_counter]->GetNode()->isVisible()
			/*&& tZombies[nZombie_counter]->ShouldSpawnAgain()*/)
		{
			/*tZombies[nZombie_counter]->GetNode()->setPosition(api::camera->getPosition());
			tZombies[nZombie_counter]->GetNode()->setRotation(vec_t(0,0,0));

			tZombies[nZombie_counter]->GetNode()->setRotation(vec_t(
			tZombies[nZombie_counter]->GetNode()->getRotation().X,
			randint(0,360),
			tZombies[nZombie_counter]->GetNode()->getRotation().Z));

			tZombies[nZombie_counter]->GetNode()->setPosition(vec_t(
			tZombies[nZombie_counter]->GetNode()->getPosition().X,
			tZombies[nZombie_counter]->GetNode()->getPosition().Y,
			randint(100, 200)) + tZombies[nZombie_counter]->GetNode()->getRotation());

			tZombies[nZombie_counter]->Spawn();
			nZombie_counter++;*/

			scene::ISceneNode* zombie = tZombies [nZombie_counter]->GetNode(); 

			core::vector3df rot (0.f, random_f32(0.f, 360.f), 0.f); 
			zombie->setRotation(rot); 
			zombie->updateAbsolutePosition(); 

			core::vector3df pos (0.f, 0.f, random_f32 (100.f, 200.f)); 
			zombie->getAbsoluteTransformation().rotateVect(pos); 

			// assumes that zombie nodes are not children of some other node 
			zombie->setPosition(api::camera->getAbsolutePosition() - pos); 

			tZombies[nZombie_counter]->Spawn();
			nZombie_counter++;
	//	}
	}

	for(int i=0;i<MAX_ZOMBIES;i++)
		if(tZombies[i]->GetNode()->isVisible())
			tZombies[i]->Update();
}

this is what it looks like from my perspective:

[vitek]

Looks like you have a problem unrelated to the placement of the zombies. Either they're being moved after you set their position, there are multiple cameras, or the camera is being moved after the zombies are spawned.

Travis

[tomtetlaw]

yeah, the camera is moving around because im controlling it, ill try to fix the problem now

EDIT:
I fixed it, instead of using
tZombies[nZombie_counter]->Spawn()
I used
tZombies[nZombie_counter]->Spawn(tZombies[nZombie_counter]->GetNode()->getPosition(),vec_t(0,0,0));

thanks for ur help : ): )