/**
* createOneDetectorInstrument, creates the most simple possible definition of an instrument in which we can extract a valid L1 and L2 distance for unit calculations.
*
* Beam direction is along X,
* Up direction is Y
*
* @param sourcePos : V3D position
* @param samplePos : V3D sample position
* @param detectorPos : V3D detector position
* @return Instrument generated.
*/
Geometry::Instrument_sptr createMinimalInstrument(const Mantid::Kernel::V3D& sourcePos, const Mantid::Kernel::V3D& samplePos, const Mantid::Kernel::V3D& detectorPos )
{
Instrument_sptr instrument = boost::make_shared<Instrument>();
instrument->setReferenceFrame(
boost::make_shared<ReferenceFrame>(Mantid::Geometry::Y /*up*/, Mantid::Geometry::X /*along*/, Left, "0,0,0"));
// A source
ObjComponent *source = new ObjComponent("source");
source->setPos(sourcePos);
source->setShape(createSphere(0.01 /*1cm*/, V3D(0,0,0), "1"));
instrument->add(source);
instrument->markAsSource(source);
// A sample
ObjComponent *sample = new ObjComponent("some-surface-holder");
sample->setPos(samplePos);
sample->setShape(createSphere(0.01 /*1cm*/, V3D(0,0,0), "1"));
instrument->add(sample);
instrument->markAsSamplePos(sample);
// A detector
Detector *det = new Detector("point-detector", 1 /*detector id*/, NULL);
det->setPos(detectorPos);
det->setShape(createSphere(0.01 /*1cm*/, V3D(0,0,0), "1"));
instrument->add(det);
instrument->markAsDetector(det);
return instrument;
}
/** Returns the position of the center of the pixel at x,y, relative to the
* center
* of the RectangularDetector, in the plain X,Y coordinates of the
* pixels (i.e. unrotated).
* @param x :: x pixel integer
* @param y :: y pixel integer
* @return a V3D vector of the relative position
*/
V3D RectangularDetector::getRelativePosAtXY(int x, int y) const {
if (m_map) {
double scalex = 1.0;
if (m_map->contains(m_rectBase, "scalex"))
scalex = m_map->get(m_rectBase, "scalex")->value<double>();
double scaley = 1.0;
if (m_map->contains(m_rectBase, "scaley"))
scaley = m_map->get(m_rectBase, "scaley")->value<double>();
return m_rectBase->getRelativePosAtXY(x, y) * V3D(scalex, scaley, 1.0);
} else
return V3D(m_xstart + m_xstep * x, m_ystart + m_ystep * y, 0);
}
/** Set the position of the Component
* The position is with respect to the parent Component
* @param x :: x position
* @param y :: y position
* @param z :: z position
*/
void Component::setPos(double x, double y, double z) {
if (!m_map)
m_pos = V3D(x, y, z);
else
throw Kernel::Exception::NotImplementedError(
"Component::setPos (for Parametrized Component)");
}
/** Get ScaleFactor of detector. Looks at the "sca" parameter in the parameter
*map.
*
* @returns A vector of the scale factors (1,1,1) if not set
*/
V3D Component::getScaleFactor() const {
if (m_map) {
Parameter_sptr par = m_map->get(m_base, "sca");
if (par) {
return par->value<V3D>();
}
}
return V3D(1, 1, 1);
}
/** Get ScaleFactor of detector. Looks at the "sca" parameter in the parameter
*map.
*
* @returns A vector of the scale factors (1,1,1) if not set
*/
V3D Component::getScaleFactor() const {
if (m_map) {
if (hasComponentInfo()) {
return m_map->componentInfo().scaleFactor(index());
} else {
Parameter_sptr par = m_map->get(m_base, ParameterMap::scale());
if (par) {
return par->value<V3D>();
}
}
}
return V3D(1, 1, 1);
}
Geometry::Instrument_sptr
createVirtualInstrument(Kernel::V3D sourcePos, Kernel::V3D samplePos,
const std::vector<Kernel::V3D> &vecdetpos,
const std::vector<detid_t> &vecdetid) {
Instrument_sptr instrument = boost::make_shared<Instrument>();
instrument->setReferenceFrame(
boost::make_shared<ReferenceFrame>(Mantid::Geometry::Y /*up*/, Mantid::Geometry::Z /*along*/, Right, "0,0,0"));
// A source
ObjComponent *source = new ObjComponent("source");
source->setPos(sourcePos);
source->setShape(createSphere(0.01 /*1cm*/, V3D(0,0,0), "1"));
instrument->add(source);
instrument->markAsSource(source);
// A sample
ObjComponent *sample = new ObjComponent("some-surface-holder");
sample->setPos(samplePos);
sample->setShape(createSphere(0.01 /*1cm*/, V3D(0,0,0), "1"));
instrument->add(sample);
instrument->markAsSamplePos(sample);
// A detector
size_t numdets = vecdetpos.size();
for (size_t i = 0; i < numdets; ++i)
{
Detector *det = new Detector("point-detector", vecdetid[i] /*detector id*/, NULL);
det->setPos(vecdetpos[i]);
// FIXME - should be cubi... pixel
det->setShape(createSphere(0.01 /*1cm*/, V3D(0,0,0), "1"));
instrument->add(det);
instrument->markAsDetector(det);
}
return instrument;
}
/**
* Enlarges this bounding box so that it encompasses that given.
* @param other :: The bounding box that should be encompassed
*/
void BoundingBox::grow(const BoundingBox &other) {
m_null = false;
// If the current box is empty then we definitely need to grow
if (minPoint() == V3D() && maxPoint() == V3D()) {
m_minPoint = other.minPoint();
m_maxPoint = other.maxPoint();
return;
}
// Simply checks if an of the points in the given box are outside this one and
// changes the coordinate appropriately
V3D otherPoint = other.minPoint();
for (size_t i = 0; i < 3; ++i) {
if (otherPoint[i] < m_minPoint[i]) {
m_minPoint[i] = otherPoint[i];
}
}
otherPoint = other.maxPoint();
for (size_t i = 0; i < 3; ++i) {
if (otherPoint[i] > m_maxPoint[i]) {
m_maxPoint[i] = otherPoint[i];
}
}
}
/**Add an additional axis to the goniometer, closer to the sample
@param name :: GoniometerAxis name
@param axisx :: the x component of the rotation axis
@param axisy :: the y component of the rotation axis
@param axisz :: the z component of the rotation axis
@param angle :: rotation angle, 0 by default
@param sense :: rotation sense (CW or CCW), CCW by default
@param angUnit :: units for angle of type#AngleUnit, angDegrees by default
*/
void Goniometer::pushAxis(std::string name, double axisx, double axisy,
double axisz, double angle, int sense, int angUnit) {
if (initFromR == true) {
throw std::runtime_error(
"Initialized from a rotation matrix, so no axes can be pushed.");
} else {
std::vector<GoniometerAxis>::iterator it;
// check if such axis is already defined
for (it = motors.begin(); it < motors.end(); ++it) {
if (name.compare((*it).name) == 0)
throw std::invalid_argument("Motor name already defined");
}
GoniometerAxis a(name, V3D(axisx, axisy, axisz), angle, sense, angUnit);
motors.push_back(a);
}
recalculateR();
}
/** Finds the approximate solid angle covered by the component when viewed from
* the point given
* @param observer :: The position from which the component is being viewed
* @returns The solid angle in steradians
* @throw NullPointerException if the underlying geometrical Object has not been
* set
*/
double ObjComponent::solidAngle(const V3D &observer) const {
// If the form of this component is not defined, throw NullPointerException
if (!shape())
throw Kernel::Exception::NullPointerException("ObjComponent::solidAngle",
"shape");
// Otherwise pass through the shifted point to the Object::solidAngle method
V3D scaleFactor = this->getScaleFactor();
if ((scaleFactor - V3D(1.0, 1.0, 1.0)).norm() < 1e-12)
return shape()->solidAngle(factorOutComponentPosition(observer));
else {
// This is the observer position in the shape's coordinate system.
V3D relativeObserver = factorOutComponentPosition(observer);
// This function will scale the object shape when calculating the solid
// angle.
return shape()->solidAngle(relativeObserver, scaleFactor);
}
}
//----------------------------------------------------------------------------------------------
///< Render Object or ObjComponent
void BitmapGeometryHandler::Render() {
// std::cout << "BitmapGeometryHandler::Render() called\n";
V3D pos;
// Wait for no error
while (glGetError() != GL_NO_ERROR)
;
// Because texture colours are combined with the geometry colour
// make sure the current colour is white
glColor3f(1.0f, 1.0f, 1.0f);
// Nearest-neighbor scaling
GLint texParam = GL_NEAREST;
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, texParam);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, texParam);
glEnable(GL_TEXTURE_2D); // enable texture mapping
int texx, texy;
m_rectDet->getTextureSize(texx, texy);
double tex_frac_x = (1.0 * m_rectDet->xpixels()) / (texx);
double tex_frac_y = (1.0 * m_rectDet->ypixels()) / (texy);
// Point to the ID of the texture that was created before - in
// RectangularDetectorActor.
// int texture_id = m_rectDet->getTextureID();
// glBindTexture (GL_TEXTURE_2D, texture_id);
// if (glGetError()>0) std::cout << "OpenGL error in glBindTexture \n";
glBegin(GL_QUADS);
glTexCoord2f(0.0, 0.0);
pos = m_rectDet->getRelativePosAtXY(0, 0);
pos += V3D(m_rectDet->xstep() * (-0.5), m_rectDet->ystep() * (-0.5),
0.0); // Adjust to account for the size of a pixel
glVertex3f((GLfloat)pos.X(), (GLfloat)pos.Y(), (GLfloat)pos.Z());
glTexCoord2f((GLfloat)tex_frac_x, 0.0);
pos = m_rectDet->getRelativePosAtXY(m_rectDet->xpixels() - 1, 0);
pos += V3D(m_rectDet->xstep() * (+0.5), m_rectDet->ystep() * (-0.5),
0.0); // Adjust to account for the size of a pixel
glVertex3f((GLfloat)pos.X(), (GLfloat)pos.Y(), (GLfloat)pos.Z());
glTexCoord2f((GLfloat)tex_frac_x, (GLfloat)tex_frac_y);
pos = m_rectDet->getRelativePosAtXY(m_rectDet->xpixels() - 1,
m_rectDet->ypixels() - 1);
pos += V3D(m_rectDet->xstep() * (+0.5), m_rectDet->ystep() * (+0.5),
0.0); // Adjust to account for the size of a pixel
glVertex3f((GLfloat)pos.X(), (GLfloat)pos.Y(), (GLfloat)pos.Z());
glTexCoord2f(0.0, (GLfloat)tex_frac_y);
pos = m_rectDet->getRelativePosAtXY(0, m_rectDet->ypixels() - 1);
pos += V3D(m_rectDet->xstep() * (-0.5), m_rectDet->ystep() * (+0.5),
0.0); // Adjust to account for the size of a pixel
glVertex3f((GLfloat)pos.X(), (GLfloat)pos.Y(), (GLfloat)pos.Z());
glEnd();
if (glGetError() > 0)
std::cout << "OpenGL error in BitmapGeometryHandler::Render \n";
glDisable(
GL_TEXTURE_2D); // stop texture mapping - not sure if this is necessary.
}
/** Set the outline of the assembly. Creates an Object and sets m_shape point to
* it.
* All child components must be detectors and positioned along a straight line
* and have the same shape.
* The shape can be either a box or a cylinder.
* @return The shape of the outline: "cylinder", "box", ...
*/
boost::shared_ptr<Object> ObjCompAssembly::createOutline() {
if (group.empty()) {
throw Kernel::Exception::InstrumentDefinitionError("Empty ObjCompAssembly");
}
if (nelements() < 2) {
g_log.warning("Creating outline with fewer than 2 elements. The outline displayed may be inaccurate.");
}
// Get information about the shape and size of a detector
std::string type;
int otype;
std::vector<Kernel::V3D> vectors;
double radius, height;
boost::shared_ptr<const Object> obj = group.front()->shape();
if (!obj) {
throw Kernel::Exception::InstrumentDefinitionError(
"Found ObjComponent without shape");
}
obj->GetObjectGeom(otype, vectors, radius, height);
if (otype == 1) {
type = "box";
} else if (otype == 3) {
type = "cylinder";
} else {
throw std::runtime_error(
"IDF \"outline\" option is only allowed for assemblies containing "
"components of types \"box\" or \"cylinder\".");
}
// Calculate the dimensions of the outline object
// find the 'moments of inertia' of the assembly
double Ixx = 0, Iyy = 0, Izz = 0, Ixy = 0, Ixz = 0, Iyz = 0;
V3D Cmass; // 'center of mass' of the assembly
for (const_comp_it it = group.begin(); it != group.end(); it++) {
V3D p = (**it).getRelativePos();
Cmass += p;
}
Cmass /= nelements();
for (const_comp_it it = group.begin(); it != group.end(); it++) {
V3D p = (**it).getRelativePos();
double x = p.X() - Cmass.X(), x2 = x * x;
double y = p.Y() - Cmass.Y(), y2 = y * y;
double z = p.Z() - Cmass.Z(), z2 = z * z;
Ixx += y2 + z2;
Iyy += x2 + z2;
Izz += y2 + x2;
Ixy -= x * y;
Ixz -= x * z;
Iyz -= y * z;
}
// principal axes of the outline shape
// vz defines the line through all pixel centres
V3D vx, vy, vz;
if (Ixx == 0) // pixels along x axis
{
vx = V3D(0, 1, 0);
vy = V3D(0, 0, 1);
vz = V3D(1, 0, 0);
} else if (Iyy == 0) // pixels along y axis
{
vx = V3D(0, 0, 1);
vy = V3D(1, 0, 0);
vz = V3D(0, 1, 0);
} else if (Izz == 0) // pixels along z axis
{
vx = V3D(1, 0, 0);
vy = V3D(0, 1, 0);
vz = V3D(0, 0, 1);
} else {
// Either the detectors are not perfectrly aligned or
// vz is parallel to neither of the 3 axis x,y,z
// This code is unfinished
DblMatrix II(3, 3), Vec(3, 3), D(3, 3);
II[0][0] = Ixx;
II[0][1] = Ixy;
II[0][2] = Ixz;
II[1][0] = Ixy;
II[1][1] = Iyy;
II[1][2] = Iyz;
II[2][0] = Ixz;
II[2][1] = Iyz;
II[2][2] = Izz;
std::cerr << "Inertia matrix: " << II << II.determinant() << '\n';
II.Diagonalise(Vec, D);
std::cerr << "Vectors: " << Vec << '\n';
std::cerr << "Moments: " << D << '\n';
vx = V3D(Vec[0][0], Vec[1][0], Vec[2][0]);
vy = V3D(Vec[0][1], Vec[1][1], Vec[2][1]);
vz = V3D(Vec[0][2], Vec[1][2], Vec[2][2]);
}
// find assembly sizes along the principal axes
double hx, hy, hz; // sizes along x,y, and z axis
// maximum displacements from the mass centre along axis vx,vy, and vz
// in positive (p) and negative (n) directions.
// positive displacements are positive numbers and negative ones are negative
double hxn = 0, hyn = 0, hzn = 0;
double hxp = 0, hyp = 0, hzp = 0;
for (const_comp_it it = group.begin(); it != group.end(); it++) {
// displacement vector of a detector
V3D p = (**it).getRelativePos() - Cmass;
// its projection on the vx axis
double h = p.scalar_prod(vx);
if (h > hxp)
hxp = h;
if (h < hxn)
hxn = h;
// its projection on the vy axis
h = p.scalar_prod(vy);
if (h > hyp)
hyp = h;
if (h < hyn)
hyn = h;
// its projection on the vz axis
h = p.scalar_prod(vz);
if (h > hzp)
hzp = h;
if (h < hzn)
hzn = h;
}
// calc the assembly sizes
hx = hxp - hxn;
hy = hyp - hyn;
hz = hzp - hzn;
// hx and hy must be practically zero
if (hx > 1e-3 || hy > 1e-3) // arbitrary numbers
{
throw Kernel::Exception::InstrumentDefinitionError(
"Detectors of a ObjCompAssembly do not lie on a staraight line");
}
// determine the order of the detectors to make sure that the texture
// coordinates are correct
bool firstAtBottom; // first detector is at the bottom of the outline shape
// the bottom end is the one with the negative displacement from the centre
firstAtBottom =
((**group.begin()).getRelativePos() - Cmass).scalar_prod(vz) < 0;
// form the input string for the ShapeFactory
std::ostringstream obj_str;
if (type == "box") {
if (hz == 0)
hz = 0.1;
hx = hy = 0;
height = 0;
V3D p0 = vectors[0];
for (size_t i = 1; i < vectors.size(); ++i) {
V3D p = vectors[i] - p0;
double h = fabs(p.scalar_prod(vx));
if (h > hx)
hx = h;
h = fabs(p.scalar_prod(vy));
if (h > hy)
hy = h;
height = fabs(p.scalar_prod(vz));
if (h > height)
height = h;
}
vx *= hx / 2;
vy *= hy / 2;
vz *= hzp + height / 2;
if (!firstAtBottom) {
vz = vz * (-1);
}
// define the outline shape as cuboid
V3D p_lfb = Cmass - vx - vy - vz;
V3D p_lft = Cmass - vx - vy + vz;
V3D p_lbb = Cmass - vx + vy - vz;
V3D p_rfb = Cmass + vx - vy - vz;
obj_str << "<cuboid id=\"shape\">";
obj_str << "<left-front-bottom-point ";
obj_str << "x=\"" << p_lfb.X();
obj_str << "\" y=\"" << p_lfb.Y();
obj_str << "\" z=\"" << p_lfb.Z();
obj_str << "\" />";
obj_str << "<left-front-top-point ";
obj_str << "x=\"" << p_lft.X();
obj_str << "\" y=\"" << p_lft.Y();
obj_str << "\" z=\"" << p_lft.Z();
obj_str << "\" />";
obj_str << "<left-back-bottom-point ";
obj_str << "x=\"" << p_lbb.X();
obj_str << "\" y=\"" << p_lbb.Y();
obj_str << "\" z=\"" << p_lbb.Z();
obj_str << "\" />";
obj_str << "<right-front-bottom-point ";
obj_str << "x=\"" << p_rfb.X();
obj_str << "\" y=\"" << p_rfb.Y();
obj_str << "\" z=\"" << p_rfb.Z();
obj_str << "\" />";
obj_str << "</cuboid>";
} else if (type == "cylinder") {
// the outline is one detector height short
hz += height;
// shift Cmass to the end of the cylinder where the first detector is
if (firstAtBottom) {
Cmass += vz * hzn;
} else {
hzp += height;
Cmass += vz * hzp;
// inverse the vz axis
vz = vz * (-1);
}
obj_str << "<segmented-cylinder id=\"stick\">";
obj_str << "<centre-of-bottom-base ";
obj_str << "x=\"" << Cmass.X();
obj_str << "\" y=\"" << Cmass.Y();
obj_str << "\" z=\"" << Cmass.Z();
obj_str << "\" />";
obj_str << "<axis x=\"" << vz.X() << "\" y=\"" << vz.Y() << "\" z=\""
<< vz.Z() << "\" /> ";
obj_str << "<radius val=\"" << radius << "\" />";
obj_str << "<height val=\"" << hz << "\" />";
obj_str << "</segmented-cylinder>";
}
if (!obj_str.str().empty()) {
boost::shared_ptr<Object> s = ShapeFactory().createShape(obj_str.str());
setOutline(s);
return s;
}
return boost::shared_ptr<Object>();
}
/**
* Builds a map based on the given number of neighbours
* @param noNeighbours :: The number of nearest neighbours to use to build
* the graph
*/
void NearestNeighbours::build(const int noNeighbours) {
std::map<specid_t, IDetector_const_sptr> spectraDets =
getSpectraDetectors(m_instrument, m_spectraMap);
if (spectraDets.empty()) {
throw std::runtime_error(
"NearestNeighbours::build - Cannot find any spectra");
}
const int nspectra =
static_cast<int>(spectraDets.size()); // ANN only deals with integers
if (noNeighbours >= nspectra) {
throw std::invalid_argument(
"NearestNeighbours::build - Invalid number of neighbours");
}
// Clear current
m_graph.clear();
m_specToVertex.clear();
m_noNeighbours = noNeighbours;
BoundingBox bbox;
// Base the scaling on the first detector, should be adequate but we can look
// at this
IDetector_const_sptr firstDet = (*spectraDets.begin()).second;
firstDet->getBoundingBox(bbox);
m_scale.reset(new V3D(bbox.width()));
ANNpointArray dataPoints = annAllocPts(nspectra, 3);
MapIV pointNoToVertex;
std::map<specid_t, IDetector_const_sptr>::const_iterator detIt;
int pointNo = 0;
for (detIt = spectraDets.begin(); detIt != spectraDets.end(); ++detIt) {
IDetector_const_sptr detector = detIt->second;
const specid_t spectrum = detIt->first;
V3D pos = detector->getPos() / (*m_scale);
dataPoints[pointNo][0] = pos.X();
dataPoints[pointNo][1] = pos.Y();
dataPoints[pointNo][2] = pos.Z();
Vertex vertex = boost::add_vertex(spectrum, m_graph);
pointNoToVertex[pointNo] = vertex;
m_specToVertex[spectrum] = vertex;
++pointNo;
}
ANNkd_tree *annTree = new ANNkd_tree(dataPoints, nspectra, 3);
pointNo = 0;
// Run the nearest neighbour search on each detector, reusing the arrays
ANNidxArray nnIndexList = new ANNidx[m_noNeighbours];
ANNdistArray nnDistList = new ANNdist[m_noNeighbours];
for (detIt = spectraDets.begin(); detIt != spectraDets.end(); ++detIt) {
ANNpoint scaledPos = dataPoints[pointNo];
annTree->annkSearch(scaledPos, // Point to search nearest neighbours of
m_noNeighbours, // Number of neighbours to find (8)
nnIndexList, // Index list of results
nnDistList, // List of distances to each of these
0.0 // Error bound (?) is this the radius to search in?
);
// The distances that are returned are in our scaled coordinate
// system. We store the real space ones.
V3D realPos = V3D(scaledPos[0], scaledPos[1], scaledPos[2]) * (*m_scale);
for (int i = 0; i < m_noNeighbours; i++) {
ANNidx index = nnIndexList[i];
V3D neighbour = V3D(dataPoints[index][0], dataPoints[index][1],
dataPoints[index][2]) *
(*m_scale);
V3D distance = neighbour - realPos;
double separation = distance.norm();
boost::add_edge(m_specToVertex[detIt->first], // from
pointNoToVertex[index], // to
distance, m_graph);
if (separation > m_cutoff) {
m_cutoff = separation;
}
}
pointNo++;
}
delete[] nnIndexList;
delete[] nnDistList;
delete annTree;
annDeallocPts(dataPoints);
annClose();
pointNoToVertex.clear();
m_vertexID = get(boost::vertex_name, m_graph);
m_edgeLength = get(boost::edge_name, m_graph);
}