bool
vpPolygon3D::getClippedPointsDistance(const vpPoint &p1, const vpPoint &p2,
vpPoint &p1Clipped, vpPoint &p2Clipped,
unsigned int &p1ClippedInfo, unsigned int &p2ClippedInfo,
const unsigned int &flag, const double &distance)
{
// Since p1 and p1Clipped can be the same object as well as p2 and p2Clipped
// to avoid a valgrind "Source and destination overlap in memcpy" error,
// we introduce a two temporary points.
vpPoint p1Clipped_, p2Clipped_;
p1Clipped_ = p1;
p2Clipped_ = p2;
p1Clipped = p1Clipped_;
p2Clipped = p2Clipped_;
bool test1 = (p1Clipped.get_Z() < distance && p2Clipped.get_Z() < distance);
if(flag == vpPolygon3D::FAR_CLIPPING)
test1 = (p1Clipped.get_Z() > distance && p2Clipped.get_Z() > distance);
bool test2 = (p1Clipped.get_Z() < distance || p2Clipped.get_Z() < distance);
if(flag == vpPolygon3D::FAR_CLIPPING)
test2 = (p1Clipped.get_Z() > distance || p2Clipped.get_Z() > distance);
bool test3 = (p1Clipped.get_Z() < distance);
if(flag == vpPolygon3D::FAR_CLIPPING)
test3 = (p1Clipped.get_Z() > distance);
if(test1)
return false;
else if(test2){
vpPoint pClippedNear;
double t;
t = (p2Clipped.get_Z() - p1Clipped.get_Z());
t = (distance - p1Clipped.get_Z()) / t;
pClippedNear.set_X((p2Clipped.get_X() - p1Clipped.get_X())*t + p1Clipped.get_X());
pClippedNear.set_Y((p2Clipped.get_Y() - p1Clipped.get_Y())*t + p1Clipped.get_Y());
pClippedNear.set_Z(distance);
if(test3){
p1Clipped = pClippedNear;
if(flag == vpPolygon3D::FAR_CLIPPING)
p1ClippedInfo = p1ClippedInfo | vpPolygon3D::FAR_CLIPPING;
else
p1ClippedInfo = p1ClippedInfo | vpPolygon3D::NEAR_CLIPPING;
}
else{
p2Clipped = pClippedNear;
if(flag == vpPolygon3D::FAR_CLIPPING)
p2ClippedInfo = p2ClippedInfo | vpPolygon3D::FAR_CLIPPING;
else
p2ClippedInfo = p2ClippedInfo | vpPolygon3D::NEAR_CLIPPING;
}
}
return true;
}
/*!
Create a vpMbScanLineEdge from two points while ordering them.
\param a : First point of the line.
\param b : Second point of the line.
\return Resulting vpMbScanLineEdge.
*/
vpMbScanLine::vpMbScanLineEdge
vpMbScanLine::makeMbScanLineEdge(const vpPoint &a, const vpPoint &b)
{
vpColVector _a(3);
vpColVector _b(3);
_a[0] = std::ceil((a.get_X() * 1e8) * 1e-6);
_a[1] = std::ceil((a.get_Y() * 1e8) * 1e-6);
_a[2] = std::ceil((a.get_Z() * 1e8) * 1e-6);
_b[0] = std::ceil((b.get_X() * 1e8) * 1e-6);
_b[1] = std::ceil((b.get_Y() * 1e8) * 1e-6);
_b[2] = std::ceil((b.get_Z() * 1e8) * 1e-6);
bool b_comp = false;
for(unsigned int i = 0 ; i < 3 ; ++i)
if (_a[i] < _b[i])
{
b_comp = true;
break;
}
else if(_a[i] > _b[i])
break;
if (b_comp)
return std::make_pair(_a, _b);
return std::make_pair(_b, _a);
}
/*!
Interpolate two vpPoints.
\param a : first point.
\param b : second point.
\param alpha : interpolation factor.
\return Interpolated vpPoint.
*/
vpPoint
vpMbScanLine::mix(const vpPoint &a, const vpPoint &b, double alpha)
{
vpPoint res;
res.set_X(a.get_X() + ( b.get_X() - a.get_X() ) * alpha);
res.set_Y(a.get_Y() + ( b.get_Y() - a.get_Y() ) * alpha);
res.set_Z(a.get_Z() + ( b.get_Z() - a.get_Z() ) * alpha);
return res;
}
/*!
Create a vpColVector of a projected point.
\param p : Point to project.
\param v : Resulting vector.
\param K : Camera parameters.
*/
void
vpMbScanLine::createVectorFromPoint(const vpPoint &p, vpColVector &v, const vpCameraParameters &K)
{
v = vpColVector(3);
v[0] = p.get_X() * K.get_px() + K.get_u0() * p.get_Z();
v[1] = p.get_Y() * K.get_py() + K.get_v0() * p.get_Z();
v[2] = p.get_Z();
}
/*!
Get the clipped points according to a plane equation.
\param cam : camera parameters
\param p1 : First extremity of the line.
\param p2 : Second extremity of the line.
\param p1Clipped : Resulting p1.
\param p2Clipped : Resulting p2.
\param p1ClippedInfo : Resulting clipping flag for p1.
\param p2ClippedInfo : Resulting clipping flag for p2.
\param A : Param A from plane equation.
\param B : Param B from plane equation.
\param C : Param C from plane equation.
\param D : Param D from plane equation.
\param flag : flag specifying the clipping used when calling this function.
\return True if the points have been clipped, False otherwise
*/
bool
vpPolygon3D::getClippedPointsFovGeneric(const vpPoint &p1, const vpPoint &p2,
vpPoint &p1Clipped, vpPoint &p2Clipped,
unsigned int &p1ClippedInfo, unsigned int &p2ClippedInfo,
const vpColVector &normal, const unsigned int &flag)
{
vpRowVector p1Vec(3);
p1Vec[0] = p1.get_X(); p1Vec[1] = p1.get_Y(); p1Vec[2] = p1.get_Z();
p1Vec = p1Vec.normalize();
vpRowVector p2Vec(3);
p2Vec[0] = p2.get_X(); p2Vec[1] = p2.get_Y(); p2Vec[2] = p2.get_Z();
p2Vec = p2Vec.normalize();
if((clippingFlag & flag) == flag){
double beta1 = acos( p1Vec * normal );
double beta2 = acos( p2Vec * normal );
// std::cout << beta1 << " && " << beta2 << std::endl;
// if(!(beta1 < M_PI / 2.0 && beta2 < M_PI / 2.0))
if(beta1 < M_PI / 2.0 && beta2 < M_PI / 2.0)
return false;
else if (beta1 < M_PI / 2.0 || beta2 < M_PI / 2.0){
vpPoint pClipped;
double t = -(normal[0] * p1.get_X() + normal[1] * p1.get_Y() + normal[2] * p1.get_Z());
t = t / ( normal[0] * (p2.get_X() - p1.get_X()) + normal[1] * (p2.get_Y() - p1.get_Y()) + normal[2] * (p2.get_Z() - p1.get_Z()) );
pClipped.set_X((p2.get_X() - p1.get_X())*t + p1.get_X());
pClipped.set_Y((p2.get_Y() - p1.get_Y())*t + p1.get_Y());
pClipped.set_Z((p2.get_Z() - p1.get_Z())*t + p1.get_Z());
if(beta1 < M_PI / 2.0){
p1ClippedInfo = p1ClippedInfo | flag;
p1Clipped = pClipped;
}
else{
p2ClippedInfo = p2ClippedInfo | flag;
p2Clipped = pClipped;
}
}
}
return true;
}
/*!
Unary function to convert the 3D coordinates in the camera frame to a cv::Point3d.
\param point : Point to convert.
\return A cv::Point3d with the 3D coordinates stored in vpPoint in the camera frame.
*/
cv::Point3d vpConvert::vpCamPointToPoint3d(const vpPoint &point) {
return cv::Point3d(point.get_X(), point.get_Y(), point.get_Z());
}
/*!
Unary function to convert the 3D coordinates in the camera frame to a cv::Point3f.
\param point : Point to convert.
\return A cv::Point3f with the 3D coordinates stored in vpPoint in the camera frame.
*/
cv::Point3f vpConvert::vpCamPointToPoint3f(const vpPoint &point) {
return cv::Point3f((float) point.get_X(), (float) point.get_Y(), (float) point.get_Z());
}
/*!
Compute the norm of two vpPoints.
\param a : first point.
\param b : second point.
\return Resulting norm.
*/
double
vpMbScanLine::norm(const vpPoint &a, const vpPoint &b)
{
return sqrt(vpMath::sqr(a.get_X()-b.get_X()) + vpMath::sqr(a.get_Y() - b.get_Y()) + vpMath::sqr(a.get_Z() - b.get_Z()));
}