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Sketcher: BSpline curvature comb

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This commit is contained in:
Abdullah Tahiri 2017-02-09 00:08:44 +01:00 committed by wmayer
parent 9c10b3219d
commit feb29bd630
1 changed files with 140 additions and 19 deletions
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159
src/Mod/Sketcher/Gui/ViewProviderSketch.cpp
View File

@ -3437,37 +3437,38 @@ void ViewProviderSketch::draw(bool temp /*=false*/, bool rebuildinformationlayer
edit->CurvIdToGeoId.push_back(GeoId);
Points.push_back(startp);
Points.push_back(endp);
//----------------------------------------------------------
// geometry information layer (degree, control polygon)
// polynom degree
// geometry information layer
// polynom degree --------------------------------------------------------
std::vector<Base::Vector3d> poles = spline->getPoles();
Base::Vector3d midp = Base::Vector3d(0,0,0);
for (std::vector<Base::Vector3d>::iterator it = poles.begin(); it != poles.end(); ++it) {
midp += (*it);
}
midp /= poles.size();
if(rebuildinformationlayer) {
SoSwitch *sw = new SoSwitch();
sw->whichChild = hGrpsk->GetBool("BSplineDegreeVisible", true)?SO_SWITCH_ALL:SO_SWITCH_NONE;
SoSeparator *sep = new SoSeparator();
sep->ref();
// no caching for fluctuand data structures
sep->renderCaching = SoSeparator::OFF;
// every information visual node gets its own material for to-be-implemented preselection and selection
SoMaterial *mat = new SoMaterial;
mat->ref();
mat->diffuseColor = InformationColor;
SoTranslation *translate = new SoTranslation;
translate->translation.setValue(midp.x,midp.y,zInfo);
SoFont *font = new SoFont;
@ -3490,24 +3491,23 @@ void ViewProviderSketch::draw(bool temp /*=false*/, bool rebuildinformationlayer
}
else {
SoSwitch *sw = static_cast<SoSwitch *>(edit->infoGroup->getChild(currentInfoNode));
if(visibleInformationChanged)
sw->whichChild = hGrpsk->GetBool("BSplineDegreeVisible", true)?SO_SWITCH_ALL:SO_SWITCH_NONE;
SoSeparator *sep = static_cast<SoSeparator *>(sw->getChild(0));
static_cast<SoTranslation *>(sep->getChild(GEOINFO_BSPLINE_DEGREE_POS))->translation.setValue(midp.x,midp.y,zInfo);
static_cast<SoText2 *>(sep->getChild(GEOINFO_BSPLINE_DEGREE_TEXT))->string = SbString(spline->getDegree());
}
currentInfoNode++; // switch to next node
//----------------------------------------------------------
// control polygon
// control polygon --------------------------------------------------------
if(rebuildinformationlayer) {
SoSwitch *sw = new SoSwitch();
sw->whichChild = hGrpsk->GetBool("BSplineControlPolygonVisible", true)?SO_SWITCH_ALL:SO_SWITCH_NONE;
SoSeparator *sep = new SoSeparator();
@ -3521,7 +3521,6 @@ void ViewProviderSketch::draw(bool temp /*=false*/, bool rebuildinformationlayer
mat->diffuseColor = InformationColor;
SoLineSet *lineset = new SoLineSet;
lineset->setName("InfoLineSet");
SoCoordinate3 *coords = new SoCoordinate3;
@ -3587,6 +3586,128 @@ void ViewProviderSketch::draw(bool temp /*=false*/, bool rebuildinformationlayer
}
currentInfoNode++; // switch to next node
// curvature graph --------------------------------------------------------
// reimplementation of python source:
// https://github.com/tomate44/CurvesWB/blob/master/ParametricComb.py
// by FreeCAD user Chris_G
double firstparam = spline->getFirstParameter();
double lastparam = spline->getLastParameter();
const int ndiv = 64;
double step = (lastparam - firstparam ) / (ndiv -1);
std::vector<double> paramlist(ndiv);
std::vector<Base::Vector3d> pointatcurvelist(ndiv);
std::vector<double> curvaturelist(ndiv);
std::vector<Base::Vector3d> normallist(ndiv);
double maxcurv = 0;
double length = spline->length(firstparam,lastparam);
for(int i = 0; i < ndiv; i++) {
paramlist[i] = firstparam + i * step;
pointatcurvelist[i] = spline->pointAtParameter(paramlist[i]);
curvaturelist[i] = spline->curvatureAt(paramlist[i]);
if(curvaturelist[i] > maxcurv)
maxcurv = curvaturelist[i];
spline->normalAt(paramlist[i],normallist[i]);
}
double repscale = ( 0.5 * length ) / maxcurv; // just a factor to make it reasonably visible
std::vector<Base::Vector3d> pointatcomblist(ndiv);
for(int i = 0; i < ndiv; i++) {
pointatcomblist[i] = pointatcurvelist[i] + repscale * curvaturelist[i] * normallist[i];
}
if(rebuildinformationlayer) {
SoSwitch *sw = new SoSwitch();
sw->whichChild = hGrpsk->GetBool("BSplineCurvatureGraphVisible", true)?SO_SWITCH_ALL:SO_SWITCH_NONE;
SoSeparator *sep = new SoSeparator();
sep->ref();
// no caching for fluctuand data structures
sep->renderCaching = SoSeparator::OFF;
// every information visual node gets its own material for to-be-implemented preselection and selection
SoMaterial *mat = new SoMaterial;
mat->ref();
mat->diffuseColor = InformationColor;
SoLineSet *lineset = new SoLineSet;
SoCoordinate3 *coords = new SoCoordinate3;
coords->point.setNum(3*ndiv); // 2*ndiv +1 points of ndiv separate segments + ndiv points for last segment
lineset->numVertices.setNum(ndiv+1); // ndiv separate segments of radials + 1 segment connecting at comb end
int32_t *index = lineset->numVertices.startEditing();
SbVec3f *vts = coords->point.startEditing();
for(int i = 0; i < ndiv; i++) {
vts[2*i].setValue(pointatcurvelist[i].x, pointatcurvelist[i].y, zInfo); // radials
vts[2*i+1].setValue(pointatcomblist[i].x, pointatcomblist[i].y, zInfo);
index[i] = 2;
vts[2*ndiv+i].setValue(pointatcomblist[i].x, pointatcomblist[i].y, zInfo); // comb endpoint closing segment
}
index[ndiv] = ndiv; // comb endpoint closing segment
coords->point.finishEditing();
lineset->numVertices.finishEditing();
sep->addChild(mat);
sep->addChild(coords);
sep->addChild(lineset);
sw->addChild(sep);
edit->infoGroup->addChild(sw);
sep->unref();
mat->unref();
}
else {
SoSwitch *sw = static_cast<SoSwitch *>(edit->infoGroup->getChild(currentInfoNode));
if(visibleInformationChanged)
sw->whichChild = hGrpsk->GetBool("BSplineCurvatureGraphVisible", true)?SO_SWITCH_ALL:SO_SWITCH_NONE;
SoSeparator *sep = static_cast<SoSeparator *>(sw->getChild(0));
SoCoordinate3 *coords = static_cast<SoCoordinate3 *>(sep->getChild(GEOINFO_BSPLINE_POLYGON));
SoLineSet *lineset = static_cast<SoLineSet *>(sep->getChild(GEOINFO_BSPLINE_POLYGON+1));
coords->point.setNum(3*ndiv); // 2*ndiv +1 points of ndiv separate segments + ndiv points for last segment
lineset->numVertices.setNum(ndiv+1); // ndiv separate segments of radials + 1 segment connecting at comb end
int32_t *index = lineset->numVertices.startEditing();
SbVec3f *vts = coords->point.startEditing();
for(int i = 0; i < ndiv; i++) {
vts[2*i].setValue(pointatcurvelist[i].x, pointatcurvelist[i].y, zInfo); // radials
vts[2*i+1].setValue(pointatcomblist[i].x, pointatcomblist[i].y, zInfo);
index[i] = 2;
vts[2*ndiv+i].setValue(pointatcomblist[i].x, pointatcomblist[i].y, zInfo); // comb endpoint closing segment
}
index[ndiv] = ndiv; // comb endpoint closing segment
coords->point.finishEditing();
lineset->numVertices.finishEditing();
}
currentInfoNode++; // switch to next node
}
else {
}