Fluently rotation of the node.

[JaskierPL]

Recently I have written a function, which allows you to turn the node to specified rotation by the shortest way. Angle is number of degress, so you can turn node in every loop by some degress and then rotation is fluently. I hope it will be useful for you.

cpp Code: Select all

 
void Turn(irr::scene::ISceneNode* node,irr::core::vector3df rot,float angle)
 {
          for(;;)
          {
          if(node->getRotation().Y>360) node->setRotation(irr::core::vector3df(node->getRotation().X,node->getRotation().Y-360,node->getRotation().Z));
          else if(node->getRotation().Y<0) node->setRotation(irr::core::vector3df(node->getRotation().X,360+node->getRotation().Y,node->getRotation().Z));
          else break;
          }
 
          float start=node->getRotation().Y;
          float destin=rot.Y;
          float wk;
          float mn;
 
          if(start!=destin)
          {
          if(destin>360) destin=destin-360;
 
          if(destin>start)
          {
          wk=destin;
          mn=start;
          }
          else
          {
          wk=start;
          mn=destin;
          }
 
         if(wk-mn<=angle) node->setRotation(irr::core::vector3df(node->getRotation().X,destin,node->getRotation().Z));
         else
         {
        if(wk-mn<mn+360-wk)
         {
        if(mn==destin) node->turn(0,-angle,0);
        else node->turn(0,angle,0);
         }
        else
        {
              if(mn==destin) node->turn(0,angle,0);
              else node->turn(0,-angle,0);
        }
        }
        }
 }
 

[REDDemon]

if(mn==destin) node->turn(0,angle,0);

Is that a recursive function? because node has no member function called "turn". So maybe you inteded to use "Turn". probably that example will not compile.

[wiedzmin112]

He is using my irrlicht compilation(i added 2 functions)

cpp Code: Select all

 
                void move(float x=0.0f, float y=0.0f, float z=0.0f)
                {
                        irr::core::matrix4 new_mat;
                        new_mat.makeIdentity();
                        new_mat.setRotationDegrees(getRotation());
                        irr::core::vector3df vm(x,y,z);
                        new_mat.transformVect(vm);
                        setPosition(getPosition()+vm);
                }
                void turn(float x=0.0f, float y=0.0f, float z=0.0f)
                {
                        setRotation(getRotation() + irr::core::vector3df(x,y,z));
                }