Method buildGhostObject

src/Physics/Physics.cpp:137–150

}

void Physics::buildGhostObject() {
    btCollisionShape *shape = buildFrustumShape();
    destroyGhostObject();

    if (!m_ghostPairCallback) {
        m_ghostPairCallback = new btGhostPairCallback();
        dynamicsWorld->getBroadphase()->getOverlappingPairCache()->setInternalGhostPairCallback(m_ghostPairCallback);
    }

    m_ghostObject = new btPairCachingGhostObject();
    m_ghostObject->setCollisionShape(shape);
    m_ghostObject->setCollisionFlags(btCollisionObject::CF_NO_CONTACT_RESPONSE);
    dynamicsWorld->addCollisionObject(m_ghostObject, btBroadphaseProxy::AllFilter, btBroadphaseProxy::StaticFilter);
}

void Physics::updateFrustrum(glm::mat4 viewMatrix) {
    if (m_ghostObject) m_ghostObject->setWorldTransform(Utils::glmToBullet(viewMatrix).inverse());