Animating Joints makes the screen flicker.

[Mel]

Is something i've noticed today, after setting up the characters to make transitions between the animations, the screen starts flickering! I mean, it is like is trying to draw everything very fast several times per frame, and it doesn't get to finish the render in time, so, the screen flickers.

It doesn't happen, on the other side, when the character is in motion, and blends the animations well, but when it is on its stance pose, the screen goes crazy. It happens in DirectX and in OPEN GL, with no dinstinction. I guess the software renderers will go fine, but is a pity that the hardware accelerated ones fail.

Keep the good work up!

[rogerborg]

Irrlicht version, code and resources that demonstrate the problem?

[Mel]

The Irrlicht version is the 1.4.2, the last one.

I'll post the actual code later because right now i don't have it available, but it is a raw call to IAnimatedMeshSceneNode::animateJoints(true).

I have a player object, which has an IAnimatedMeshSceneNode, i used the setTransitionTime() with 0.25 as parameter and the setJointMode() method with EJUOR_CONTROL.

The Mesh is a .X file. I hope this is descriptive enough. Ill post the actual code later.

[Mel]

This is the code. I hope you don't need the .X File, but if you have any interest, just ask.

The code which made the thing go wrong are marked with "////////////////////////////"

Code: Select all

class myAnimationEndCB : public IAnimationEndCallBack 
{
      void  OnAnimationEnd (IAnimatedMeshSceneNode *node){
            node->setLoopMode(true);
            node->setFrameLoop(0,45);
      }
};

player::player(IrrlichtDevice *device, ISceneNode *parent,ISceneManager *mangr,s32 id=0, const c8 *XFile=0)
{
    smgr=mangr;
    keys=0;
    avatarMesh=0;
    avatar=0;
    status=0;
    lastStatus=0; //para detectar cambios de estado, luego esto se hará con un FSM que reaccionara a las entradas de "keys"
    rotAngle=0;
    reloj=device->getTimer();
    linearSpeed=8.0f;//incluir metodos para variar la velocidad lineal por segundo, de momento es fija a 5 metros por segundo
    currentTime=reloj->getTime();
    ITexture *NormalMap;
    IGPUProgrammingServices *gpu;
    u32 materialType;
    shaderConstants *mySC=new shaderConstants();
    presionado=false;
    gravitySpeed=0;
    
    if(XFile){
      avatarMesh = (ISkinnedMesh*)smgr->getMesh(XFile);
      avatarMesh->setInterpolationMode(EIM_LINEAR );
      avatarMesh->convertMeshToTangents();
      avatar= smgr->addAnimatedMeshSceneNode(avatarMesh);
      avatar->setFrameLoop(0,45);
      avatar->setID(id);
      gpu=smgr->getVideoDriver()->getGPUProgrammingServices();
      //amos a intentar meterle un shader molon...
      /*
       materialType=gpu->addHighLevelShaderMaterialFromFiles(
       "./data/graphics/shaders/ShaderPhongLightV.hlsl",
       "vs_main",
       EVST_VS_2_0,  
       "./data/graphics/shaders/ShaderPhongLightP.hlsl",  
       "ps_main",  
       EPST_PS_2_0,  
       mySC,  
       EMT_SOLID,  
       0);
      */
     
      NormalMap=smgr->getVideoDriver()->getTexture("./data/graphics/characters/uni-alpha/blueref.png");
      avatar->getMaterial(0).MaterialType=EMT_REFLECTION_2_LAYER;
      avatar->getMaterial(0).setTexture(1,NormalMap);
      
      
      for(int i=0;i<avatar->getMaterialCount();i++){
        avatar->getMaterial(i).setFlag(EMF_FOG_ENABLE ,true);
        avatar->getMaterial(i).AmbientColor=SColor(255,128,128,128);
       }
    }
    ///////////////////////////////////////////////////////////////////here
    avatar->setTransitionTime(0.25);
    avatar->setJointMode(EJUOR_CONTROL);
    /////////////////////////////////////////////////////////////////////////
}

void player::update(ISceneNodeAnimatorCollisionResponse *collider){

     
     core::vector3df vectRot=core::vector3df(0,0,0);
     core::triangle3df tri;
     core::vector3df colPoint;

     lastTime=currentTime;
     currentTime=reloj->getTime();

     myAnimationEndCB *myAnEndCB = new myAnimationEndCB();
     
     lastStatus=status;
     status=ESPERANDO;
     vectRot=vector3df(0.0,0.0,0.0);
     avRot=vector3df(0.0,0.0,0.0);
     
     avatar->setAnimationEndCallback(myAnEndCB);
     ////////////////////////////////////////////////////////////////////Here!
     avatar->animateJoints(true);
    ////////////////////////////////////////////////////////////////////

     if(collider->isFalling()){             //&& (lastPos.Y-avatar->getPosition().Y)*(lastPos.Y-avatar->getPosition().Y)>0.001
        if(lastStatus==SALTO)
          avatar->setLoopMode(false);
        }else{
           avatar->setLoopMode(true);
     }
     
     
           lastPos=avatar->getPosition();
     
           if((*keys)&31 && lastStatus!=ATAQUE && !presionado){       
                      avRot=avatar->getPosition()-smgr->getActiveCamera()->getPosition();//rotacion con respecto a la camara
           if((*keys)&1){
                      vectRot.Z=1;
                      status=CORRIENDO;
                      }
           if((*keys)&4){
                      vectRot.X=1;
                      status=CORRIENDO;
                      }
           if((*keys)&8){
                      vectRot.Z=-1;
                      status=CORRIENDO;
                      }
           if((*keys)&2){
                      vectRot.X=-1;//o un multiplicador analógico de un mando idem
                      status=CORRIENDO;
                      }
           if((*keys)&16 && !presionado){
                      vectRot.Y=1.0;
                      status=SALTO;
                      }
           rotAngle=vectRot.getHorizontalAngle().Y;//esto es correcto, lo incorrecto es la inclinacion del personaje,
           //pero con un mando analógico, es cuando deberia ser suave.

           avRot.Y=0;
           avRot.rotateXZBy(rotAngle,core::vector3df(0.0,0.0,0.0));

           if(vectRot.X==0 && vectRot.Z==0){
                      avRot.X=0.0;
                      avRot.Z=0.0;
           }
           avRot=avRot.normalize();
           avRot.Y+=vectRot.Y;
           avatar->setPosition(avatar->getPosition()+ avRot*linearSpeed/1000*(currentTime-lastTime));

           if(vectRot.X!=0 || vectRot.Z!=0){
           //actualizamos solo si merece la pena ;)
             Face = avatar->getPosition()-lastPos;
           }
           }           
           avatar->setRotation(core::vector3df(0, Face.getHorizontalAngle().Y, 0));
           
           if((*keys)&32&&status!=ATAQUE && !presionado){
             status=ATAQUE;
             presionado=true;
             avatar->setLoopMode(false);
           }
           if(avatar->getStartFrame()==0){
             presionado=false;
           }
    
     if(lastStatus==ESPERANDO && status==ATAQUE){avatar->setFrameLoop(90,100);}
     if(lastStatus==SALTO && status==ATAQUE){avatar->setFrameLoop(90,100);}
     if(lastStatus==CORRIENDO && status==ATAQUE){avatar->setFrameLoop(90,100);}
     if(lastStatus==ESPERANDO && status==CORRIENDO){avatar->setFrameLoop(55,75);}
     if(lastStatus==SALTO && status==CORRIENDO){avatar->setFrameLoop(55,75);}
     if(lastStatus==CORRIENDO && status==SALTO){avatar->setFrameLoop(80,85);}
     if(lastStatus==ESPERANDO && status==SALTO){avatar->setFrameLoop(80,85);}
     if(lastStatus!=ESPERANDO && status==ESPERANDO){avatar->setFrameLoop(0,45);}
     
     
     //actualizamos el aspecto del personaje.
     
     smgr->getSceneCollisionManager()->getCollisionPoint(core::line3df(avatar->getPosition(),avatar->getPosition()-vector3df(0,1,0)),
           collider->getWorld(),
           colPoint,
           tri);
     //ya puestos, podria dibujarse un circulito ahi abajo y ya tenemos sombras simples XD
}

I'm not too good documenting code, but i think it is pretty much understandable.

[rogerborg]

Sorry, I can't replicate it. Can you make your resources available please.

[Mel]

http://rapidshare.com/files/163700734/a ... g.rar.html

Here, i thought it is better that you have the very subject than a small sample. I hope this is useful.

[rogerborg]

OK, I can see the effect, but I don't know why. I'll take a closer look when time allows. hybrid or Luke are probably better placed to figure it out though.

[Mel]

Okay! thanks! i hope it is something without much importance.