Cylinders do not collide with each other or capsules

[Anthony Walter]

Using the most recent release ode-0.16.6 and also checking back to release ode-0.16.3, the same problem appears in each. The problem is that while cylinder shapes dCreateCylinder collide correctly with planes, boxes, and spheres, they pass completely through other cylinders. The also pass through capsules dCreateCapsule. Capsules, however, do collide with each other and other shapes that are not cylinders.

I could not find this issue on any bug tracker, but am confident you regulars know about this issue. Are there any plans to fix this and what is the history with this problem?

[Oleh Derevenko]

Hi Anthony,

You need to enable libccd while configuring the library for the cylinder collisions to work.

Oleh Derevenko

-- Skype with underscore

 

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From: ode-...@googlegroups.com on behalf of Anthony Walter
Sent: Friday, March 14, 2025 5:19
To: ode-users
Subject: [ode-users] Cylinders do not collide with each other or capsules

You don't often get email from sys...@gmail.com. Learn why this is important

Using the most recent release ode-0.16.6 and also checking back to release ode-0.16.3, the same problem appears in each. The problem is that while cylinder shapes dCreateCylinder collide correctly with planes, boxes, and spheres, they pass completely through other cylinders. The also pass through capsules dCreateCapsule. Capsules, however, do collide with each other and other shapes that are not cylinders.

I could not find this issue on any bug tracker, but am confident you regulars know about this issue. Are there any plans to fix this and what is the history with this problem?

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[Anthony Walter]

Thank you, that fixed the problem.

cmake .. -DBUILD_SHARED_LIBS=ON -DCMAKE_BUILD_TYPE=Release -DODE_DOUBLE_PRECISION=OFF -DODE_WITH_LIBCCD=ON

Is there any downside to using libccd other than licensing and are there any other side effects to using it?

[Oleh Derevenko]

From: ode-...@googlegroups.com on behalf of Anthony Walter

Sent: Friday, March 14, 2025 19:46
To: ode-...@googlegroups.com
Subject: Re: [ode-users] Cylinders do not collide with each other or capsules

You don't often get email from sys...@gmail.com. Learn why this is important

Thank you, that fixed the problem.

> cmake .. -DBUILD_SHARED_LIBS=ON -DCMAKE_BUILD_TYPE=Release -DODE_DOUBLE_PRECISION=OFF -DODE_WITH_LIBCCD=ON

I would suggest you enable the double precision. There is no reason to perform spatial computations with single precision these days.

> Is there any downside to using libccd other than licensing and are there any other side effects to using it?

It provides collision alternative check functions for cylinders and convex shapes. Most of these are available with the libccd only

Oleh Derevenko

-- Skype with underscore

 

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