Rotating a model in 3D space

[NewImage]

Hi
I'm trying to put together a dog fight space game. The spaceship is a IMeshSceneNode But I'm having some problems with rotating in 3D space relative to the object it self.

I was trying to use the code in this topic
http://irrlicht.sourceforge.net/phpBB2/ ... t=rotation


But unlike the camera, mesh nodes don't have a getTarget() and GetUpVector() . I don't know how to create a relative XYZ space that I can rotate around and keep it locked to the ship as it moves and spins.

Any help would be great thank you.

----

after looking on some forums would this work?

Code: Select all

  core::vector3df forward(0, 0, 1);

  core::matrix4 m;
  m.setRotationDegrees( node->getRotationDegrees() );

  // rotate the forward vector into parent coords
  m.rotateVect(forward);

  // get the old position
  core::vector3df position(node->getPosition());

  // get the distance moved this time slice
  f32 distance = velocity * time;

  // augment the node position
  position += (forward * distance);
  node->setPosition(position); 

and just do this again with a left right vector?

[arras]

Free Flight (space flight) functions

You can also modify that code to use AbsoluteTransformation but in principle it is the same:

Code: Select all

irr::core::matrix4 m = node->getAbsoluteTransformation();

[NewImage]

Thank you for your reply, ill give that a shot. I have another question, what does absolute mean, I see it in the getrotation and getposition functions, and now in this?

[hybrid]

Absolute coordinates are the relative ones, transformed to the world coordinate system (i.e. taking into account all parent transformations). For scene nodes without parents the both are the same.