Real-Time Physics Simulation Forum

Re: How to solve the problem of the ball penetrating the cuboid

2020-06-24T07:28:42+00:00

The simple way to do it is to use: btCollisionObject::setWorldTransform()

So the code might look like this:
Code:
btTransform t = body->getWorldTransform();t.setRotation(btQuaternion(roll, pitch, yaw));body->setWorldTransform(t);

Thank you very much

Statistics: Posted by water — Wed Jun 24, 2020 7:28 am

Re: How to solve the problem of the ball penetrating the cuboid

2020-06-24T06:21:31+00:00

The simple way to do it is to use: btCollisionObject::setWorldTransform()

So the code might look like this:

Code:

btTransform t = body->getWorldTransform();t.setRotation(btQuaternion(roll, pitch, yaw));body->setWorldTransform(t);

Statistics: Posted by drleviathan — Wed Jun 24, 2020 6:21 am

Re: How to solve the problem of the ball penetrating the cuboid

2020-06-24T00:50:07+00:00

Thank you very much for your reply. I found that initobjectground() in my code was initialized only once, so btquaternion quaternion = btquaternion (yaw, pich, roll); it was also called only once, resulting in unable to change the Euler angle of the model. Can I ask if there is any way to control the Euler angle of the rigid body in the bullet to realize the rotation of the rigid body?

Statistics: Posted by water — Wed Jun 24, 2020 12:50 am

Re: How to solve the problem of the ball penetrating the cuboid

2020-06-23T13:33:45+00:00

I see. You have a logic error rather than a question about Euler angles and quaternions. The good news is: I don't see the fault of the code you posted. The bad news would be: your bug is somewhere else. Maybe post your full code up on github? Good luck.

Statistics: Posted by drleviathan — Tue Jun 23, 2020 1:33 pm

Re: How to solve the problem of the ball penetrating the cuboid

2020-06-23T03:42:08+00:00

I want to change the Euler angle in real time through the keyboard and display it through OpenGL,I put the initialization of the model in InitObjectground();But the model doesn't move when I press the key to change yaw roll

Code:

glPushMatrix();glTranslated(float(trans.getOrigin().getX()), float(trans.getOrigin().getY()), float(trans.getOrigin().getZ()));DrawBulletObject();glPopMatrix();

Code:

void MyWindow::initializeGL(){glClearColor(0.0, 0.0, 0.0, 0.0);glEnable(GL_DEPTH_TEST);glShadeModel(GL_SMOOTH);glEnable(GL_AUTO_NORMAL);glEnable(GL_NORMALIZE);InitObject();InitObjectground();}

Code:

void MyWindow::paintGL(){Display();}

Statistics: Posted by water — Tue Jun 23, 2020 3:42 am

Re: How to solve the problem of the ball penetrating the cuboid

2020-06-22T14:30:17+00:00

The code looks ok. What is the error?

The angles you are using... they are in radians (not degrees) right?

Statistics: Posted by drleviathan — Mon Jun 22, 2020 2:30 pm

How to solve the problem of the ball penetrating the cuboid

2020-06-22T10:24:12+00:00

Code:

btQuaternion quaternion = btQuaternion(yaw,pich,roll);quaternion.setEuler(yaw, pitch, roll);groundTransform.setRotation(quaternion);

I want to rotate the rigid body by setting the Euler angle, but there is an error. Can you help me to see how to write it?

Statistics: Posted by water — Mon Jun 22, 2020 10:24 am