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// Gmsh - Copyright (C) 1997-2021 C. Geuzaine, J.-F. Remacle
//
// See the LICENSE.txt file for license information. Please report all
// issues on https://gitlab.onelab.info/gmsh/gmsh/issues.
#include "Warp.h"
#include "SmoothData.h"
#include "Numeric.h"
StringXNumber WarpOptions_Number[] = {
{GMSH_FULLRC, "Factor", nullptr, 1.},
{GMSH_FULLRC, "TimeStep", nullptr, 0.},
{GMSH_FULLRC, "SmoothingAngle", nullptr, 180.},
{GMSH_FULLRC, "View", nullptr, -1.},
{GMSH_FULLRC, "OtherView", nullptr, -1.}};
extern "C" {
GMSH_Plugin *GMSH_RegisterWarpPlugin() { return new GMSH_WarpPlugin(); }
}
std::string GMSH_WarpPlugin::getHelp() const
{
return "Plugin(Warp) transforms the elements in the "
"view `View' by adding to their node coordinates "
"the vector field stored in the `TimeStep'-th time "
"step of the view `OtherView', scaled by `Factor'.\n\n"
"If `View' < 0, the plugin is run on the current view.\n\n"
"If `OtherView' < 0, the vector field is taken as the "
"field of surface normals multiplied by the `TimeStep' "
"value in `View'. (The smoothing of the surface "
"normals is controlled by the `SmoothingAngle' "
"parameter.)\n\n"
"Plugin(Warp) is executed in-place.";
}
int GMSH_WarpPlugin::getNbOptions() const
{
return sizeof(WarpOptions_Number) / sizeof(StringXNumber);
}
StringXNumber *GMSH_WarpPlugin::getOption(int iopt)
{
return &WarpOptions_Number[iopt];
}
PView *GMSH_WarpPlugin::execute(PView *v)
{
double factor = WarpOptions_Number[0].def;
int TimeStep = (int)WarpOptions_Number[1].def;
double AngleTol = WarpOptions_Number[2].def;
int iView = (int)WarpOptions_Number[3].def;
int otherView = (int)WarpOptions_Number[4].def;
PView *v1 = getView(iView, v);
if(!v1) return v;
if(otherView < 0) otherView = iView;
PView *v2 = getView(otherView, v);
if(!v2) return v;
PViewData *data1 = getPossiblyAdaptiveData(v1);
PViewData *data2 = getPossiblyAdaptiveData(v2);
// sanity checks
if(data1->getNumEntities() != data2->getNumEntities() ||
data1->getNumElements() != data2->getNumElements()) {
Msg::Error("Incompatible views");
return v;
}
if(TimeStep < 0 || TimeStep > data2->getNumTimeSteps() - 1) {
Msg::Error("Invalid TimeStep (%d) in View[%d]", TimeStep, v2->getIndex());
return v;
}
// create smooth normal field if we don't have an explicit warp field
smooth_normals *normals = nullptr;
if(otherView < 0) {
normals = new smooth_normals(AngleTol);
for(int ent = 0; ent < data1->getNumEntities(0); ent++) {
for(int ele = 0; ele < data1->getNumElements(0, ent); ele++) {
if(data1->skipElement(0, ent, ele)) continue;
int numEdges = data1->getNumEdges(0, ent, ele);
if(numEdges == 3 || numEdges == 4) {
double x[4], y[4], z[4], n[4];
for(int nod = 0; nod < numEdges; nod++)
data1->getNode(0, ent, ele, nod, x[nod], y[nod], z[nod]);
normal3points(x[0], y[0], z[0], x[1], y[1], z[1], x[2], y[2], z[2],
n);
for(int nod = 0; nod < numEdges; nod++)
normals->add(x[nod], y[nod], z[nod], n[0], n[1], n[2]);
}
}
}
}
if(data1->isNodeData()) {
// tag all the nodes with "0" (the default tag)
for(int step = 0; step < data1->getNumTimeSteps(); step++) {
for(int ent = 0; ent < data1->getNumEntities(step); ent++) {
for(int ele = 0; ele < data1->getNumElements(step, ent); ele++) {
if(data1->skipElement(step, ent, ele)) continue;
for(int nod = 0; nod < data1->getNumNodes(step, ent, ele); nod++)
data1->tagNode(step, ent, ele, nod, 0);
}
}
}
}
// transform each "0" node: (x,y,z) += factor * mult * (valx, valy, valz)
for(int step = 0; step < data1->getNumTimeSteps(); step++) {
for(int ent = 0; ent < data1->getNumEntities(step); ent++) {
for(int ele = 0; ele < data1->getNumElements(step, ent); ele++) {
if(data1->skipElement(step, ent, ele)) continue;
int numNodes = data1->getNumNodes(step, ent, ele);
if(numNodes < 2) continue;
double x[8], y[8], z[8], n[3] = {0., 0., 0.};
int tag[8];
for(int nod = 0; nod < numNodes; nod++)
tag[nod] =
data1->getNode(step, ent, ele, nod, x[nod], y[nod], z[nod]);
int dim = data1->getDimension(step, ent, ele);
if(normals && dim == 2)
normal3points(x[0], y[0], z[0], x[1], y[1], z[1], x[2], y[2], z[2],
n);
for(int nod = 0; nod < numNodes; nod++) {
if(data1->isNodeData() && tag[nod]) continue; // already transformed
double mult = 1., val[3] = {n[0], n[1], n[2]};
if(normals) {
if(dim == 2) {
normals->get(x[nod], y[nod], z[nod], val[0], val[1], val[2]);
data1->getScalarValue(step, ent, ele, nod, mult);
}
}
else if(data2->getNumComponents(TimeStep, ent, ele) == 3 &&
data2->getNumNodes(TimeStep, ent, ele) == numNodes) {
for(int comp = 0; comp < 3; comp++)
data2->getValue(TimeStep, ent, ele, nod, comp, val[comp]);
}
x[nod] += factor * mult * val[0];
y[nod] += factor * mult * val[1];
z[nod] += factor * mult * val[2];
data1->setNode(step, ent, ele, nod, x[nod], y[nod], z[nod]);
if(data1->isNodeData()) data1->tagNode(step, ent, ele, nod, 1);
}
}
}
}
if(normals) delete normals;
data1->finalize();
v1->setChanged(true);
return v1;
}
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