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Asked: 2026-05-28T01:16:24+00:00

I’m using Ogre and Bullet for a project and I currently have a first

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I’m using Ogre and Bullet for a project and I currently have a first person camera set up with a Capsule Collision Shape. I’ve created a model of a cave (which will serve as the main part of the level) and imported it into my game. I’m now trying to create an OgreBulletCollisions::TriangleMeshCollisionShape of the cave.

The code I’ve got so far is this but it isn’t working. It compiles but the Capsule shape passes straight through the cave shape. Also I have debug outlines on and there are none being drawn around the cave mesh.

Entity *cave = mSceneMgr->createEntity("Cave", "pCube1.mesh");

SceneNode *caveNode = mSceneMgr->getRootSceneNode()->createChildSceneNode();
caveNode->setPosition(0, 10, 250);
caveNode->setScale(10, 10, 10);
caveNode->rotate(Quaternion(0.5, 0.5, -0.5, 0.5));
caveNode->attachObject(cave);

OgreBulletCollisions::StaticMeshToShapeConverter *smtsc = new OgreBulletCollisions::StaticMeshToShapeConverter();
smtsc->addEntity(cave);

OgreBulletCollisions::TriangleMeshCollisionShape *tri = smtsc->createTrimesh();

OgreBulletDynamics::RigidBody *caveBody = new OgreBulletDynamics::RigidBody("cave", mWorld);
caveBody->setStaticShape(tri, 0.1, 0.8);

mShapes.push_back(tri);
mBodies.push_back(caveBody);

Any suggestions are welcome.

To clarify. It compiles but the Capsule shape passes straight through the cave shape. Also I have debug outlines on and there are none being drawn around the cave mesh

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1 Answer

  1. Editorial Team

    In the end I had to use a btScaledBvhTriangleMeshShape. So my code now looks like

    OgreBulletCollisions::StaticMeshToShapeConverter *smtsc = 
     new OgreBulletCollisions::StaticMeshToShapeConverter();
smtsc->addEntity(cave);

OgreBulletCollisions::TriangleMeshCollisionShape *tri = smtsc->createTrimesh();

OgreBulletDynamics::RigidBody *caveBody = new OgreBulletDynamics::RigidBody("cave", mWorld);

btScaledBvhTriangleMeshShape *triShape = new btScaledBvhTriangleMeshShape((btBvhTriangleMeshShape*)(tri->getBulletShape()), btVector3(150, 150, 150));

caveBody->setStaticShape(triShape, 0.0, 5, Vector3::ZERO, rotationQuaternion);
caveBody->setDebugDisplayEnabled(true);
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