full model rotation for missile models

Alex-bomber_Man · Post by **Alex-bomber_Man** » Wed May 09, 2007 11:30

I tried to make model for rocket. i made that, wrote a definition, started the game. all works nice, but when i shoot with a big vertical angle, the missile model is looking the same as it flies dirrect. How to make it rotate vertically, like the sprites are?

Post by **Graf Zahl** » Wed May 09, 2007 16:35

This is a limitation of ZDoom. It doesn't set the pitch of the missiles so the model code doesn't know about it. I'll see if I can fix this in ZDoom because otherwise I'd have to maintain the changed code separately which I don't particularly want.

Post by **Nash** » Sun May 13, 2007 23:59

I've been meaning to request this too but never got around to it. It would be great if you can implement it Graf.

Post by **Paul** » Fri May 18, 2007 21:40

Offtopic
Noticed this bug is also present in the Duke 3d Hi-res Resource Pack?

Post by **Tormentor667** » Mon Jun 04, 2007 14:30

Paul wrote:Offtopic
Noticed this bug is also present in the Duke 3d Hi-res Resource Pack?

Where can I get that?

Post by **KeksDose** » Mon Jun 04, 2007 16:46

Tormentor667 wrote:Where can I get that?

*Cough* http://files.filefront.com/Duke+Nukem+3 ... einfo.html *Cough* *Cough* 200MB *Cough*

Post by **Tormentor667** » Mon Jun 04, 2007 17:33

Devan · Post by **Devan** » Mon Jul 02, 2007 9:13

Paul wrote:Offtopic
Noticed this bug is also present in the Duke 3d Hi-res Resource Pack?

Some mods fix this using CON files in DN3D. For example, DeeperThought's DNWMD and Duke Nukem Arena. Really offtopic

Post by **Torr Samaho** » Wed Aug 15, 2007 16:38

Graf Zahl wrote:This is a limitation of ZDoom. It doesn't set the pitch of the missiles so the model code doesn't know about it. I'll see if I can fix this in ZDoom because otherwise I'd have to maintain the changed code separately which I don't particularly want.

As a workaround you can estimate the pitch from the momentum of the rocket. I know that's a hack but this looks better than doing nothing.

Just put

Code: Select all

	// [BB] Workaround for the missing pitch information of rocktes.
	if( spr->actor->GetClass( ) == PClass::FindClass( "Rocket" ) )
	{
		const double x = static_cast<double>(spr->actor->momx);
		const double y = static_cast<double>(spr->actor->momy);
		const double z = static_cast<double>(spr->actor->momz);
		// [BB] Calculate the pitch using spherical coordinates.
		const double pitch = atan( z/sqrt(x*x+y*y) ) / M_PI * 180;

		gl.Rotatef(pitch, 0, 0, 1);
	}

after the gl.Rotatef command in gl_RenderModel.

Post by **Graf Zahl** » Thu Aug 16, 2007 23:38

Ugh...

Don't expect me to put such awful code into the renderer...

Post by **Torr Samaho** » Fri Aug 17, 2007 13:06

I have to admit that the "actor == rocket" check is awful, but I don't see what's so bad about the idea in general for certain models. One could just add a PITCHFROMMOMENTUM flag to the model definition and let the model maker decide if the model benefits from the pitch estimation or not.

This is certainly not as good as if you would fix the ZDoom limitation, but IMHO it's better than keeping the pitch at zero for models where you can estimate the pitch.

The HavoX · Post by **The HavoX** » Fri Aug 17, 2007 15:59

The first rule in coding...

Do not be tempted into taking shortcuts by adding hacks!