Problems making an airplane look to it's speed direction

Gamestudio Links

Zorro Links

loading historical data 1st time
by AndrewAMD. 04/14/23 12:54

Trade at bar open
by juanex. 04/13/23 19:43

Bug in Highpass2 filter
by rki. 04/13/23 09:54

Adding Limit Orders For IB
by scatters. 04/11/23 16:16

FisherN
by rki. 04/11/23 08:38

AUM Magazine

Latest Screens

2 registered members (juanex, AndrewAMD), 988 guests, and 8 spiders.

Key: Admin, Global Mod, Mod

Newest Members

Print Thread

Rate Thread

Problems making an airplane look to it's speed direction #309197 02/07/10 20:38 02/07/10 20:38
Joined: Aug 2009 Posts: 1,438 Spain painkiller OP Serious User
painkiller OP Serious User Joined: Aug 2009 Posts: 1,438 Spain	Hi, i've an airplane, and I need to simulate the aerodynamic forces (angular forces) wich makes the plane to look always to it's speed direction. F.example: You yaw right the airplane, and afther it must return to it's speed direction, so the airplane must hace an angular force wich makes it to look where it's going. But this force mustn't change the plane's roll. I've created this code but it doesn't work: Code: vec_diff(center, plane.pan, direction); //count the angle difference between plane an it's direction vec_set(center, vector(sign(center.x)0.08, sign(center.y)0.08 , 0)); //scale the torque phent_addtorqueglobal (plane, center); I need help to do this right, i've tried lot's of things but i can't get it work properly Last edited by painkiller; 02/07/10 20:38. 3D Gamestudio A8 Pro AMD FX 8350 4.00 Ghz 16GB RAM Gigabyte GeForce GTX 960 4GB

Re: Problems making an airplane look to it's speed direction [Re: painkiller] #309860 02/11/10 17:45 02/11/10 17:45
Joined: Aug 2009 Posts: 1,438 Spain painkiller OP Serious User
painkiller OP Serious User Joined: Aug 2009 Posts: 1,438 Spain	please, nobody can help me? 3D Gamestudio A8 Pro AMD FX 8350 4.00 Ghz 16GB RAM Gigabyte GeForce GTX 960 4GB

Re: Problems making an airplane look to it's speed direction [Re: painkiller] #318301 04/06/10 20:44 04/06/10 20:44
Joined: Apr 2010 Posts: 38 D deianthropus Newbie
deianthropus Newbie D Joined: Apr 2010 Posts: 38	i did this in reverse very recently. I had a ball rolling on a surface whose view was set by the camera. The ball always has to roll in the direction of the camera view, so the force applied to the ball is a vector whose x-coordinate is the cosin of the angle complimentary to the angle at which the camera looks at the ball, multiplied by the ground distance (distance of the camera on the x and y plane), and therefore also the y-value of the vector is radius * sin(ang). The same principles apply to your problem, only in reverse. I can't tell you the specifics of your problem (except that I try to avoid magic numbers like your 0.08 coefficient), but sketch out the problem in terms of a unit circle and assign variables (on paper) to EVERY part of the problem, even the things you'll discard when you actually program it. That's been my technique so far. Last edited by deianthropus; 04/06/10 20:52.

Re: Problems making an airplane look to it's speed direction [Re: deianthropus] #323952 05/18/10 15:48 05/18/10 15:48
Joined: Mar 2010 Posts: 120 Switzerland T TehV Member
TehV Member T Joined: Mar 2010 Posts: 120 Switzerland	Hmm, the easiest solution I know would be to add damping to your plane, around 50 units for linear, and 25 units for angluar. Then I would glue a small piece to the tip of the plane (Not sure how to do this though) that has about the same weight as the plane. This block should not have damping. This will cause the block to pull the plane's tip into the direcion the plane is flying. However, you will also have to apply all your forces to the block instead of to the actual plane. You can make the small block passable and invisible to avoid physics interactions with other items. The block should have about 5% of the planes width, height and lenght.

Moderated by HeelX, Spirit