Recent content by Xcrypt

Thanks :)

So, basically, you're saying that due to deformation, the contactNormal I "estimate" in my code is not correct. In reality it would be in a different direction? But then, is it really friction that stops a ball? This would mean it's actually the collision force (along normal) stopping the ball...

Hello, I am a coder trying to build a game 2D rigid body physics engine. So far I am working with an impulse-based approach and all is going pretty decent. Everything does it's job, except one thing: friction acting on a rolling ball. First I will explain how my collision resolution system...

Don't worry, I'm not saying physicists are wrong :) But I still need clarification for the situation with the pen on my finger! In the case where I apply a force with one finger only, where is the other force coming from that would create a zero net linear force?

Well my question was not really whether I was correct or not. I even stated that I'm most likely wrong. The question is why. Please read my question. I can spin a pen on one finger (by pushing it with one finger only), without changing any visually noticeable change in linear velocity. However...

Hello. I'm currently coding on a physics engine. To do so, I looked up some code from open-source engines. I noted that there is a function where you can apply a force to a rigid body, outside it's center of mass. It goes something like this: ApplyForceAPosition(vector force, vector...

I think so, yes. Thanks

I'm not sure what a bounded subset is, but I certainly don't want an asymptote. The problem is slightly ill defined because I don't have much knowledge about calc + I'm not used to expressing math terms in English. But I hope you can get a 'feel' for what I want to achieve? Anyway, I solved the...

update: I've found a 2nd degree polynomial that goes through 3 points. x=0.0, y=1.0 x=0.3, y=0.3 x=1.0, y=0.0 Solved: ((40/21)*((x)^(2)))-((61/21)*(x))+1 (check http://www.freemathhelp.com/equation-grapher.html ) But this is not what I want because it's going under the x-axis instead of...

Thanks, Robert1986 and chiro :)

Thanks, just the techniques would do, the code (should) come naturally when you understand the techniques :) Are these techniques you are naming covered in a calculus book? I have heard many of them by name, but I haven't looked into them yet

Well, please go on then :)

I'm programming a camera for a game, and to achieve some effect I think the best solution would be some kind of function. What I need to achieve, is a function that: - 'starts' at x1, with a y value of y1. - 'ends' at x2, with a y value of y2. - I also need some parameter to control the...

Although you probably have way more experience than me in mathematics, I find your answer hard to believe... Since acos is an inverse function of cos, they must be related in some way? If not, you just turned my whole mathematical beliefs upside down!

I'm trying to create some kind of demo that rushes through a tunnel. I have made a random path generator that creates smooth looking paths in 3D space (just some 3D points) Now I would like to create polies that form a tunnel around that path. To give an example, let us assume that the path...