Search found 42 matches
- Sun May 03, 2015 11:05 pm
- Forum: Links, Papers, Libraries, Demos, Movies, Comparisons
- Topic: Interaction with Geometry video now public on GDC Vault
- Replies: 3
- Views: 38194
Interaction with Geometry video now public on GDC Vault
My 2013 Math Tutorial video on GDC Vault is now publicly accessible: http://www.gdcvault.com/play/1017654/Math-for-Game-Programmers-Interaction I suspect most people here on the Bullet Physics forum are probably very competent with math and geometry already. Nonetheless, being the last Math Tutorial...
- Thu Nov 13, 2014 5:11 am
- Forum: Physics authoring tools, serialization, standards and related topics
- Topic: StanHull convex hull generation
- Replies: 4
- Views: 67398
Re: StanHull convex hull generation
I recently had a bit of free time between employers to redo the hull implementation. updated code can be found at: https://github.com/melax/sandbox https://github.com/melax/sandbox/blob/master/include/hull.h Algorithmic-wise its the same. The difference is that the code is tighter and style follows ...
- Mon Nov 04, 2013 6:52 am
- Forum: Links, Papers, Libraries, Demos, Movies, Comparisons
- Topic: rigid body Rubik's Cube short video
- Replies: 2
- Views: 35156
rigid body Rubik's Cube short video
Just for fun...
Ever wonder how a game-physics programmer implements a Rubik's Cube app? Grab some popcorn, turn up the sound, and click on the link below:
http://www.youtube.com/watch?v=uo3QrcZlr_E
enjoy
Ever wonder how a game-physics programmer implements a Rubik's Cube app? Grab some popcorn, turn up the sound, and click on the link below:
http://www.youtube.com/watch?v=uo3QrcZlr_E
enjoy
- Sat Jun 15, 2013 12:21 am
- Forum: Links, Papers, Libraries, Demos, Movies, Comparisons
- Topic: Fully Articulated 3D Skeletal Hand Tracking
- Replies: 6
- Views: 56364
Re: Fully Articulated 3D Skeletal Hand Tracking
Not an officially supported product, but feel free to try:Will this 3D skeletal finger tracking be included
http://software.intel.com/en-us/article ... al-release
- Sat Feb 16, 2013 10:25 pm
- Forum: Links, Papers, Libraries, Demos, Movies, Comparisons
- Topic: Fully Articulated 3D Skeletal Hand Tracking
- Replies: 6
- Views: 56364
Re: Fully Articulated 3D Skeletal Hand Tracking
I'm extremely sorry about that, we were asked to go "dark" for a few weeks.
Same links should work then.
stan
Same links should work then.
stan
- Mon Feb 04, 2013 9:00 am
- Forum: Links, Papers, Libraries, Demos, Movies, Comparisons
- Topic: Fully Articulated 3D Skeletal Hand Tracking
- Replies: 6
- Views: 56364
Re: Fully Articulated 3D Skeletal Hand Tracking
Here's a follow-up gameplay concept video I just made showing how hand tracking might be used in a 3D environment:
http://www.youtube.com/watch?v=sAcTshfZCU8
To interact with stuff it uses a typical powered-ragdoll technique, which i'm sure everybody here is quite familiar with.
-stan
http://www.youtube.com/watch?v=sAcTshfZCU8
To interact with stuff it uses a typical powered-ragdoll technique, which i'm sure everybody here is quite familiar with.
-stan
- Wed Jan 30, 2013 9:37 pm
- Forum: Career Opportunities
- Topic: Interaction Developer Position at Intel Perceptual Computing
- Replies: 0
- Views: 33402
Interaction Developer Position at Intel Perceptual Computing
Greetings, Intel's perceptual computing team is looking to expand. The specific position is for developing user tracking technology and 3D interactive usages based on it. An Ideal candidate would have a strong simulation background. Search for job requisition number 704329 at http://jobs.intel.com T...
- Sat Jan 12, 2013 9:46 am
- Forum: Links, Papers, Libraries, Demos, Movies, Comparisons
- Topic: Fully Articulated 3D Skeletal Hand Tracking
- Replies: 6
- Views: 56364
Fully Articulated 3D Skeletal Hand Tracking
I've posted a couple of youtube videos showing markerless hand and finger tracking based on depth sensor data. Here's the link: http://www.youtube.com/watch?v=8ctQm1VOC6M There are a couple of others on the same youtube channel. The tech provides the 6dof pose of all 17 bones in the hand (palm, wris...
- Wed Jun 02, 2010 6:55 pm
- Forum: General Bullet Physics Support and Feedback
- Topic: need help about "shortestArcQuat"
- Replies: 3
- Views: 3941
Re: need help about "shortestArcQuat"
let's assume theta = the angle between v0 and v1. from s = btSqrt((1.0f + d) * 2.0f), I know s =2*cos(theta/2); so I think rs should be sin(theta/2), rs = sqrt(1-pow(s/2,2)), and last return value should be like [x*sin(theta/2),y*sin(theta/2),z*sin(theta/2),cos(theta/2)]. but why rs = 1.0f/s ;? and...
- Fri May 07, 2010 8:32 pm
- Forum: Research and development discussion about Collision Detection and Physics Simulation
- Topic: Structual Analysis with Bullet
- Replies: 1
- Views: 3811
Re: Structual Analysis with Bullet
It sounds like a reasonable idea. The solver of a physics engine iterates until it arrives at an impulse at each contact/constraint/joint that satisfies the system. Simple example... using a simple physics engine, if you look at the contacts at the bottom of a single stack of blocks then you can see...
- Fri May 07, 2010 7:05 pm
- Forum: Research and development discussion about Collision Detection and Physics Simulation
- Topic: Matrix vs Quaternion
- Replies: 4
- Views: 7924
Re: Matrix vs Quaternion
Admittedly there are different opinions on the subject: http://www.gamedev.net/reference/articles/article1199.asp :) my 2c: Anything non rendering is pretty much quaternions for me. From an api perspective it might be easier to specify the placement of a joint/constraint with a matrix (such as axis ...
- Tue Apr 08, 2008 9:09 pm
- Forum: General Bullet Physics Support and Feedback
- Topic: correction to shortestArcQuat
- Replies: 5
- Views: 5586
Re: correction to shortestArcQuat
Code I sent to Erwin in case anybody is interested. SIMD_FORCE_INLINE btQuaternion shortestArcQuat(const btVector3& v0, const btVector3& v1) // Game Programming Gems 2.10. make sure v0,v1 are normalized { btVector3 c = v0.cross(v1); btScalar d = v0.dot(v1); if (d < -1.0 + SIMD_EPSILON) { ext...
- Mon Mar 31, 2008 1:15 am
- Forum: Physics authoring tools, serialization, standards and related topics
- Topic: StanHull convex hull generation
- Replies: 4
- Views: 67398
Re: StanHull convex hull generation
I will have to let Stan talk for himself about the algorithm he used in his implementation. My primary contribution was packaging of the source code and doing some pre and post-processing cleanup. I initially wrote the code to use in a 3ds max plugin where the artist could select the number of vert...
- Sat Mar 22, 2008 2:02 am
- Forum: General Bullet Physics Support and Feedback
- Topic: correction to shortestArcQuat
- Replies: 5
- Views: 5586
correction to shortestArcQuat
Need to make a small correction to the function shortestArcQuat() in bullet. Any math library that has a similar function might want to also ensure the implementation is correct. The problem is in the special case where the two vectors are collinear, but facing opposite directions. Refer to line 003...
- Sun Feb 24, 2008 9:26 pm
- Forum: General Bullet Physics Support and Feedback
- Topic: Bullet colission with Enviroments
- Replies: 6
- Views: 9375
Re: Bullet colission with Enviroments
AABB trees can be a suitable option too. Any hierarchical spatial structure can provide log(n) performance for collision queries. The plane shifting bsp traversal was origianlly designed for translational sweep tests. There is some approximation (false positives) in the result since the separating a...