bool BuildingCollsionImpl::collsionRay(const ResultPoint3& org, const ResultPoint3& dir, ResultPoint3& hit)
{
IceMaths::Ray ray(Point(org.x, org.y, org.z), Point(dir.x, dir.y, dir.z));
// 每次查询前初始化射线于交点的距离为最大值
m_hitDistance = std::numeric_limits<float>::infinity();
Opcode::RayCollider rayCollider;
Opcode::CollisionFaces result;
rayCollider.SetUserData(this);
rayCollider.SetHitCallback(hitCallback);
// flag为false时，执行完整的查询，hitCallback会被回调多次（次数等同于射线在这次查询中碰到的点的个数）
rayCollider.SetFirstContact(false);
rayCollider.SetCulling(false);
// rayCollider.SetClosestHit(true);
// rayCollider.SetMaxDist();
rayCollider.Collide(ray, *m_modelScene);
if(rayCollider.GetContactStatus())
{
hit.x = m_hitPoint.x;
hit.y = m_hitPoint.y;
hit.z = m_hitPoint.z;
return true;
}
return false;
}
double ColdetModel::computeDistanceWithRay(const double *point,
const double *dir)
{
Opcode::RayCollider RC;
Ray world_ray(Point(point[0], point[1], point[2]),
Point(dir[0], dir[1], dir[2]));
Opcode::CollisionFace CF;
Opcode::SetupClosestHit(RC, CF);
udword Cache;
RC.Collide(world_ray, dataSet->model, transform, &Cache);
if (CF.mDistance == FLT_MAX){
return 0;
}else{
return CF.mDistance;
}
}