Bullet Physics btConvexShape to Softbody

Question

我有一个简单的问题:如何将btConvexShape转换为btSoftBody？通过使用btSoftBodyHelpers::CreateFromConvexHull？如果是这样的话，我不清楚如何根据helper和convex shape的bullets文档将凸包传递给softbody helper

Answer 1

btConvexShape可以是bullet中的任何凸面对象，而不仅仅是凸面外壳。您应该根据具体的子类实现不同的方法。使用btCollisionShape::getShapeType() (return values)找出具体的实现，然后强制转换。例如：

btSoftBody* convexShapeToSoft(const btConvexShape& shape)
{
    if(shape.getShapeType() == BOX_SHAPE_PROXYTYPE)
    {
        const btBoxShape& boxShape = static_cast<const btBoxShape&>(shape);

        // Build btSoftBody using the box vertices
    }
    else if(shape.getShapeType() == SPHERE_SHAPE_PROXYTYPE)
    {
        const btSphereShape& shpereShape = static_cast<const btSphereShape&>(shape);

        // Build btSoftBody using the box vertices
    }
    // ....
}