Search found 21 matches

by Brian Beuken
Wed Oct 04, 2017 1:17 am
Forum: General Bullet Physics Support and Feedback
Topic: Books or Tutorials?
Replies: 0
Views: 1095

Books or Tutorials?

I'm pretty comfortable using Bullet, on a very basic level, it does all I need for now and most of my usual physics systems have ported across quite easily. I've used a lot of different Physics engines at whatever level my project needed. But I don't have an especially good grounding in maths or phy...
by Brian Beuken
Fri Sep 08, 2017 12:53 pm
Forum: Links, Papers, Libraries, Demos, Movies, Comparisons
Topic: Why all physics engines differ each other
Replies: 2
Views: 3223

Re: Why all physics engines differ each other

hmm there's lots of reasons, here's some. Physics is a big topic, and though the maths for it is pretty much constant in all systems, the main thing about using a physics engine in a C++ project, is that it has to simulate real world massively parallel mechanics, on a non real world linear and mostl...
by Brian Beuken
Thu Aug 31, 2017 3:46 pm
Forum: General Bullet Physics Support and Feedback
Topic: Bullet Physics FAQ, TODO List and Issue Tracker
Replies: 4
Views: 42357

Re: Bullet Physics FAQ, TODO List and Issue Tracker

any ETA on that?


:D its been a while and I have so many questions a FAQ would surely answer.
by Brian Beuken
Wed Aug 30, 2017 11:33 pm
Forum: General Bullet Physics Support and Feedback
Topic: Raytest seems to be inconsistent?
Replies: 3
Views: 1853

Re: Raytest seems to be inconsistent?

yeah good advice, My offsetting is working perfectly though so for now i'll leave it. I don't know enough about the filtering methods to really use it, I was hoping there was some way to remove/flag an object out of the physics world, do the cast, then restore it, but that does not see to be availab...
by Brian Beuken
Wed Aug 30, 2017 12:45 am
Forum: General Bullet Physics Support and Feedback
Topic: Raytest seems to be inconsistent?
Replies: 3
Views: 1853

Raytest seems to be inconsistent?

Thought this might be helpful to others as it confused me for a few days. I am trying to do a broad occlude on some characters in my demo, using a ray cast from my main player character (which will usually be fps, so a camera) to the position of the character being tested. So I pass Player and Enemy...
by Brian Beuken
Sat Aug 26, 2017 10:46 am
Forum: General Bullet Physics Support and Feedback
Topic: collision issue with mesh
Replies: 7
Views: 2216

Re: collision issue with mesh

did you try to fix the normals, as suggested?
by Brian Beuken
Tue Aug 22, 2017 7:51 pm
Forum: General Bullet Physics Support and Feedback
Topic: collision issue with mesh
Replies: 7
Views: 2216

Re: collision issue with mesh

Before I could get to this, I decided to try making my player a capsule rather than a cylinder, as suggested in the thread, and the result is spectacular. No separation events and no dips and jumps, the character is moving along and crossing boundaries between polygons perfectly. I will try to imple...
by Brian Beuken
Tue Aug 22, 2017 10:58 am
Forum: General Bullet Physics Support and Feedback
Topic: collision issue with mesh
Replies: 7
Views: 2216

Re: collision issue with mesh

Interesting topic, thanks, I will see if I can impliment the fix. Though there is some suggestion in thread that it was going to be fixed in later versions of bullet? Since its an old thead was this not done?
by Brian Beuken
Mon Aug 21, 2017 12:53 pm
Forum: General Bullet Physics Support and Feedback
Topic: collision issue with mesh
Replies: 7
Views: 2216

collision issue with mesh

Another odd little issue, I can frig a solution by clamping to the height of the model off the floor, and testing to allow gravity to occur, but wonder if there's an inbuilt solution i am missing. My environment is a btTriangleMesh and I have a btCylinderShape moving around using linearvelocity, tho...
by Brian Beuken
Sat Aug 19, 2017 7:49 pm
Forum: General Bullet Physics Support and Feedback
Topic: Simulate Lighting Conditions in VR with Pybullet
Replies: 1
Views: 1101

Re: Simulate Lighting Conditions in VR with Pybullet

Lighting is really up to you, and depends on what graphic systems you are using. Bullet uses basic openGL1.1 for its debug rendering using basic shading(though its easy to change to shader based systems)
If you need lighting you will have to write your own rendering systems and put lights in to suit.
by Brian Beuken
Tue Aug 15, 2017 11:27 pm
Forum: General Bullet Physics Support and Feedback
Topic: How do I stop my character toppling over
Replies: 4
Views: 1798

Re: How do I stop my character toppling over

yeah velocity is the route I chose, I reset all angular velocity to 0 and set up rotations of +-1 degree on the y axis to alter direction, I now get perfectly solid movement, and no drifiting, but have gravity and collision detection all working fine. The only loss is bouncing off collisions due to ...
by Brian Beuken
Tue Aug 15, 2017 8:32 am
Forum: General Bullet Physics Support and Feedback
Topic: How do I stop my character toppling over
Replies: 4
Views: 1798

Re: How do I stop my character toppling over

Perfect, thank you, I appreciate the help, I wish there were more example projects based on game usage that would allow me to find out things like this, its proving quite time consuming trying to get thing to work as I expect them with trial and error. angular motion being particularly hard to contr...
by Brian Beuken
Mon Aug 14, 2017 7:37 am
Forum: General Bullet Physics Support and Feedback
Topic: How do I stop my character toppling over
Replies: 4
Views: 1798

How do I stop my character toppling over

I'm doing an FPS style demo, using bullet to move and control collision, as well as providing ray casts for the LOS systems and so on. But I am having a bit of trouble controlling my characters which are cylinder or capsule objects running around an internal maze. They work fine most of the time, bu...
by Brian Beuken
Sat Aug 05, 2017 2:32 pm
Forum: General Bullet Physics Support and Feedback
Topic: Rotation of a character to alter its orientaiton
Replies: 2
Views: 1367

Re: Rotation of a character to alter its orientaiton

thank you I'll try that. Edit...thank you that worked a treat I have now created 2 small utility functions in my Physics Object class to make it a little cleaner to use in game. As I found this hard to locate in a search I will post this here for any others like me who are new to Bullet. // couple o...
by Brian Beuken
Fri Aug 04, 2017 9:04 pm
Forum: General Bullet Physics Support and Feedback
Topic: Rotation of a character to alter its orientaiton
Replies: 2
Views: 1367

Rotation of a character to alter its orientaiton

I am having a bit of an issue with rotation, I want to spin a character on the spot to allow him to choose his direction of travel, but from the point of his creation as a rigidBody, I can find no methods to alter his orientation once created. The btMotionstate allows me to gain access to the report...