#if !defined(HEADLESS)

// Check that the resource system works.

dbp("%s", LoadString("banner.txt").data());

#endif

Platform::SettingsRef settings = Platform::GetSettings();

SS.tangentArcRadius = 10.0;

// Then, load the registry settings.

// Default list of colors for the model material

modelColor[0] = settings->ThawColor("ModelColor_0", RGBi(150, 150, 150));

modelColor[1] = settings->ThawColor("ModelColor_1", RGBi(100, 100, 100));

modelColor[2] = settings->ThawColor("ModelColor_2", RGBi( 30, 30, 30));

modelColor[3] = settings->ThawColor("ModelColor_3", RGBi(150, 0, 0));

modelColor[4] = settings->ThawColor("ModelColor_4", RGBi( 0, 100, 0));

modelColor[5] = settings->ThawColor("ModelColor_5", RGBi( 0, 80, 80));

modelColor[6] = settings->ThawColor("ModelColor_6", RGBi( 0, 0, 130));

modelColor[7] = settings->ThawColor("ModelColor_7", RGBi( 80, 0, 80));

// Light intensities

lightIntensity[0] = settings->ThawFloat("LightIntensity_0", 1.0);

lightIntensity[1] = settings->ThawFloat("LightIntensity_1", 0.5);

ambientIntensity = 0.3; // no setting for that yet

// Light positions

lightDir[0].x = settings->ThawFloat("LightDir_0_Right", -1.0);

lightDir[0].y = settings->ThawFloat("LightDir_0_Up", 1.0);

lightDir[0].z = settings->ThawFloat("LightDir_0_Forward", 0.0);

lightDir[1].x = settings->ThawFloat("LightDir_1_Right", 1.0);

lightDir[1].y = settings->ThawFloat("LightDir_1_Up", 0.0);

lightDir[1].z = settings->ThawFloat("LightDir_1_Forward", 0.0);

exportMode = false;

// Chord tolerance

chordTol = settings->ThawFloat("ChordTolerancePct", 0.5);

// Max pwl segments to generate

maxSegments = settings->ThawInt("MaxSegments", 10);

// Chord tolerance

exportChordTol = settings->ThawFloat("ExportChordTolerance", 0.1);

// Max pwl segments to generate

exportMaxSegments = settings->ThawInt("ExportMaxSegments", 64);

// View units

viewUnits = (Unit)settings->ThawInt("ViewUnits", (uint32_t)Unit::MM);

// Number of digits after the decimal point

afterDecimalMm = settings->ThawInt("AfterDecimalMm", 2);

afterDecimalInch = settings->ThawInt("AfterDecimalInch", 3);

// Camera tangent (determines perspective)

cameraTangent = settings->ThawFloat("CameraTangent", 0.3f/1e3);

// Grid spacing

gridSpacing = settings->ThawFloat("GridSpacing", 5.0);

// Export scale factor

exportScale = settings->ThawFloat("ExportScale", 1.0);

// Export offset (cutter radius comp)

exportOffset = settings->ThawFloat("ExportOffset", 0.0);

// Rewrite exported colors close to white into black (assuming white bg)

fixExportColors = settings->ThawBool("FixExportColors", true);

// Draw back faces of triangles (when mesh is leaky/self-intersecting)

drawBackFaces = settings->ThawBool("DrawBackFaces", true);

// Check that contours are closed and not self-intersecting

checkClosedContour = settings->ThawBool("CheckClosedContour", true);

// Enable automatic constrains for lines

automaticLineConstraints = settings->ThawBool("AutomaticLineConstraints", true);

// Draw closed polygons areas

showContourAreas = settings->ThawBool("ShowContourAreas", false);

// Export shaded triangles in a 2d view

exportShadedTriangles = settings->ThawBool("ExportShadedTriangles", true);

// Export pwl curves (instead of exact) always

exportPwlCurves = settings->ThawBool("ExportPwlCurves", false);

// Background color on-screen

backgroundColor = settings->ThawColor("BackgroundColor", RGBi(0, 0, 0));

// Whether export canvas size is fixed or derived from bbox

exportCanvasSizeAuto = settings->ThawBool("ExportCanvasSizeAuto", true);

// Margins for automatic canvas size

exportMargin.left = settings->ThawFloat("ExportMargin_Left", 5.0);

exportMargin.right = settings->ThawFloat("ExportMargin_Right", 5.0);

exportMargin.bottom = settings->ThawFloat("ExportMargin_Bottom", 5.0);

exportMargin.top = settings->ThawFloat("ExportMargin_Top", 5.0);

// Dimensions for fixed canvas size

exportCanvas.width = settings->ThawFloat("ExportCanvas_Width", 100.0);

exportCanvas.height = settings->ThawFloat("ExportCanvas_Height", 100.0);

exportCanvas.dx = settings->ThawFloat("ExportCanvas_Dx", 5.0);

exportCanvas.dy = settings->ThawFloat("ExportCanvas_Dy", 5.0);

// Extra parameters when exporting G code

gCode.depth = settings->ThawFloat("GCode_Depth", 10.0);

gCode.passes = settings->ThawInt("GCode_Passes", 1);

gCode.feed = settings->ThawFloat("GCode_Feed", 10.0);

gCode.plungeFeed = settings->ThawFloat("GCode_PlungeFeed", 10.0);

// Show toolbar in the graphics window

showToolbar = settings->ThawBool("ShowToolbar", true);

// Recent files menus

for(size_t i = 0; i < MAX_RECENT; i++) {

std::string rawPath = settings->ThawString("RecentFile_" + std::to_string(i), "");

if(rawPath.empty()) continue;

recentFiles.push_back(Platform::Path::From(rawPath));

}

// Autosave timer

autosaveInterval = settings->ThawInt("AutosaveInterval", 5);

// Locale

std::string locale = settings->ThawString("Locale", "");

if(!locale.empty()) {

SetLocale(locale);

}

generateAllTimer = Platform::CreateTimer();

generateAllTimer->onTimeout = std::bind(&SolveSpaceUI::GenerateAll, &SS, Generate::DIRTY,

/*andFindFree=*/false, /*genForBBox=*/false);

showTWTimer = Platform::CreateTimer();

showTWTimer->onTimeout = std::bind(&TextWindow::Show, &TW);

autosaveTimer = Platform::CreateTimer();

autosaveTimer->onTimeout = std::bind(&SolveSpaceUI::Autosave, &SS);

// The default styles (colors, line widths, etc.) are also stored in the

// configuration file, but we will automatically load those as we need

// them.

ScheduleAutosave();

NewFile();

AfterNewFile();

if(TW.window && GW.window) {

TW.window->ThawPosition(settings, "TextWindow");

GW.window->ThawPosition(settings, "GraphicsWindow");

TW.window->SetVisible(true);

GW.window->SetVisible(true);

GW.window->Focus();

// Do this once the window is created.

Request3DConnexionEventsForWindow(GW.window);

}

Platform::Path autosaveFile = filename.WithExtension(AUTOSAVE_EXT);

FILE *f = OpenFile(autosaveFile, "rb");

if(!f)

return false;

fclose(f);

Platform::MessageDialogRef dialog = CreateMessageDialog(GW.window);

using Platform::MessageDialog;

dialog->SetType(MessageDialog::Type::QUESTION);

dialog->SetTitle(C_("title", "Autosave Available"));

dialog->SetMessage(C_("dialog", "An autosave file is available for this sketch."));

dialog->SetDescription(C_("dialog", "Do you want to load the autosave file instead?"));

dialog->AddButton(C_("button", "&Load autosave"), MessageDialog::Response::YES,

/*isDefault=*/true);

dialog->AddButton(C_("button", "Do&n't Load"), MessageDialog::Response::NO);

// FIXME(async): asyncify this call

if(dialog->RunModal() == MessageDialog::Response::YES) {

unsaved = true;

return LoadFromFile(autosaveFile, /*canCancel=*/true);

}

return false;

bool autosaveLoaded = LoadAutosaveFor(filename);

bool fileLoaded = autosaveLoaded || LoadFromFile(filename, /*canCancel=*/true);

if(fileLoaded) {

saveFile = filename;

AddToRecentList(filename);

} else {

saveFile.Clear();

NewFile();

}

AfterNewFile();

unsaved = autosaveLoaded;

return fileLoaded;

Platform::SettingsRef settings = Platform::GetSettings();

GW.window->FreezePosition(settings, "GraphicsWindow");

TW.window->FreezePosition(settings, "TextWindow");

// Recent files

for(size_t i = 0; i < MAX_RECENT; i++) {

std::string rawPath;

if(recentFiles.size() > i) {

rawPath = recentFiles[i].raw;

}

settings->FreezeString("RecentFile_" + std::to_string(i), rawPath);

}

// Model colors

for(size_t i = 0; i < MODEL_COLORS; i++)

settings->FreezeColor("ModelColor_" + std::to_string(i), modelColor[i]);

// Light intensities

settings->FreezeFloat("LightIntensity_0", (float)lightIntensity[0]);

settings->FreezeFloat("LightIntensity_1", (float)lightIntensity[1]);

// Light directions

settings->FreezeFloat("LightDir_0_Right", (float)lightDir[0].x);

settings->FreezeFloat("LightDir_0_Up", (float)lightDir[0].y);

settings->FreezeFloat("LightDir_0_Forward", (float)lightDir[0].z);

settings->FreezeFloat("LightDir_1_Right", (float)lightDir[1].x);

settings->FreezeFloat("LightDir_1_Up", (float)lightDir[1].y);

settings->FreezeFloat("LightDir_1_Forward", (float)lightDir[1].z);

// Chord tolerance

settings->FreezeFloat("ChordTolerancePct", (float)chordTol);

// Max pwl segments to generate

settings->FreezeInt("MaxSegments", (uint32_t)maxSegments);

// Export Chord tolerance

settings->FreezeFloat("ExportChordTolerance", (float)exportChordTol);

// Export Max pwl segments to generate

settings->FreezeInt("ExportMaxSegments", (uint32_t)exportMaxSegments);

// View units

settings->FreezeInt("ViewUnits", (uint32_t)viewUnits);

// Number of digits after the decimal point

settings->FreezeInt("AfterDecimalMm", (uint32_t)afterDecimalMm);

settings->FreezeInt("AfterDecimalInch", (uint32_t)afterDecimalInch);

// Camera tangent (determines perspective)

settings->FreezeFloat("CameraTangent", (float)cameraTangent);

// Grid spacing

settings->FreezeFloat("GridSpacing", gridSpacing);

// Export scale

settings->FreezeFloat("ExportScale", exportScale);

// Export offset (cutter radius comp)

settings->FreezeFloat("ExportOffset", exportOffset);

// Rewrite exported colors close to white into black (assuming white bg)

settings->FreezeBool("FixExportColors", fixExportColors);

// Draw back faces of triangles (when mesh is leaky/self-intersecting)

settings->FreezeBool("DrawBackFaces", drawBackFaces);

// Draw closed polygons areas

settings->FreezeBool("ShowContourAreas", showContourAreas);

// Check that contours are closed and not self-intersecting

settings->FreezeBool("CheckClosedContour", checkClosedContour);

// Enable automatic constrains for lines

settings->FreezeBool("AutomaticLineConstraints", automaticLineConstraints);

// Export shaded triangles in a 2d view

settings->FreezeBool("ExportShadedTriangles", exportShadedTriangles);

// Export pwl curves (instead of exact) always

settings->FreezeBool("ExportPwlCurves", exportPwlCurves);

// Background color on-screen

settings->FreezeColor("BackgroundColor", backgroundColor);

// Whether export canvas size is fixed or derived from bbox

settings->FreezeBool("ExportCanvasSizeAuto", exportCanvasSizeAuto);

// Margins for automatic canvas size

settings->FreezeFloat("ExportMargin_Left", exportMargin.left);

settings->FreezeFloat("ExportMargin_Right", exportMargin.right);

settings->FreezeFloat("ExportMargin_Bottom", exportMargin.bottom);

settings->FreezeFloat("ExportMargin_Top", exportMargin.top);

// Dimensions for fixed canvas size

settings->FreezeFloat("ExportCanvas_Width", exportCanvas.width);

settings->FreezeFloat("ExportCanvas_Height", exportCanvas.height);

settings->FreezeFloat("ExportCanvas_Dx", exportCanvas.dx);

settings->FreezeFloat("ExportCanvas_Dy", exportCanvas.dy);

// Extra parameters when exporting G code

settings->FreezeFloat("GCode_Depth", gCode.depth);

settings->FreezeInt("GCode_Passes", gCode.passes);

settings->FreezeFloat("GCode_Feed", gCode.feed);

settings->FreezeFloat("GCode_PlungeFeed", gCode.plungeFeed);

// Show toolbar in the graphics window

settings->FreezeBool("ShowToolbar", showToolbar);

// Autosave timer

settings->FreezeInt("AutosaveInterval", autosaveInterval);

// And the default styles, colors and line widths and such.

Style::FreezeDefaultStyles(settings);

Platform::ExitGui();

switch(viewUnits) {

case Unit::INCHES: return 25.4;

case Unit::METERS: return 1000.0;

case Unit::MM: return 1.0;

}

return 1.0;

switch(viewUnits) {

case Unit::INCHES: return ssprintf("%.*f", afterDecimalInch, v / 25.4);

case Unit::METERS: return ssprintf("%.*f", afterDecimalMm, v / 1000.0);

case Unit::MM: return ssprintf("%.*f", afterDecimalMm, v);

}

return "";

if(viewUnits == Unit::INCHES) {

afterDecimalInch = v;

} else {

afterDecimalMm = v;

}

if(!usePerspectiveProj) {

return 0;

} else {

return cameraTangent;

}

// Clear out the traced point, which is no longer valid

traced.point = Entity::NO_ENTITY;

traced.path.l.Clear();

// and the naked edges

nakedEdges.Clear();

// Quit export mode

justExportedInfo.draw = false;

centerOfMass.draw = false;

exportMode = false;

// GenerateAll() expects the view to be valid, because it uses that to

// fill in default values for extrusion depths etc. (which won't matter

// here, but just don't let it work on garbage)

SS.GW.offset = Vector::From(0, 0, 0);

SS.GW.projRight = Vector::From(1, 0, 0);

SS.GW.projUp = Vector::From(0, 1, 0);

GenerateAll(Generate::ALL);

GW.Init();

TW.Init();

unsaved = false;

GW.ZoomToFit();

// Create all the default styles; they'll get created on the fly anyways,

// but can't hurt to do it now.

Style::CreateAllDefaultStyles();

UpdateWindowTitles();

auto it = std::find_if(recentFiles.begin(), recentFiles.end(),

[&](const Platform::Path &p) { return p.Equals(filename); });

if(it != recentFiles.end()) {

recentFiles.erase(it);

}

if(recentFiles.size() > MAX_RECENT) {

recentFiles.erase(recentFiles.begin() + MAX_RECENT);

}

recentFiles.insert(recentFiles.begin(), filename);

GW.PopulateRecentFiles();

Platform::SettingsRef settings = Platform::GetSettings();

Platform::Path newSaveFile = saveFile;

if(saveAs || saveFile.IsEmpty()) {

Platform::FileDialogRef dialog = Platform::CreateSaveFileDialog(GW.window);

dialog->AddFilter(C_("file-type", "SolveSpace models"), { "slvs" });

dialog->ThawChoices(settings, "Sketch");

if(!newSaveFile.IsEmpty()) {

dialog->SetFilename(newSaveFile);

}

if(dialog->RunModal()) {

dialog->FreezeChoices(settings, "Sketch");

newSaveFile = dialog->GetFilename();

} else {

return false;

}

}

if(SaveToFile(newSaveFile)) {

AddToRecentList(newSaveFile);

RemoveAutosave();

saveFile = newSaveFile;

unsaved = false;

return true;

} else {

return false;

}

{

ScheduleAutosave();

if(!saveFile.IsEmpty() && unsaved) {

SaveToFile(saveFile.WithExtension(AUTOSAVE_EXT));

}

{

Platform::Path autosaveFile = saveFile.WithExtension(AUTOSAVE_EXT);

RemoveFile(autosaveFile);

if(!unsaved) return true;

Platform::MessageDialogRef dialog = CreateMessageDialog(GW.window);

using Platform::MessageDialog;

dialog->SetType(MessageDialog::Type::QUESTION);

dialog->SetTitle(C_("title", "Modified File"));

if(!SolveSpace::SS.saveFile.IsEmpty()) {

dialog->SetMessage(ssprintf(C_("dialog", "Do you want to save the changes you made to "

"the sketch “%s”?"), saveFile.raw.c_str()));

} else {

dialog->SetMessage(C_("dialog", "Do you want to save the changes you made to "

"the new sketch?"));

}

dialog->SetDescription(C_("dialog", "Your changes will be lost if you don't save them."));

dialog->AddButton(C_("button", "&Save"), MessageDialog::Response::YES,

/*isDefault=*/true);

dialog->AddButton(C_("button", "Do&n't Save"), MessageDialog::Response::NO);

dialog->AddButton(C_("button", "&Cancel"), MessageDialog::Response::CANCEL);

// FIXME(async): asyncify this call

switch(dialog->RunModal()) {

case MessageDialog::Response::YES:

return GetFilenameAndSave(/*saveAs=*/false);

case MessageDialog::Response::NO:

RemoveAutosave();

return true;

default:

return false;

}

if(!GW.window || !TW.window) return;

if(saveFile.IsEmpty()) {

GW.window->SetTitle(C_("title", "(new sketch)"));

} else {

if(!GW.window->SetTitleForFilename(saveFile)) {

GW.window->SetTitle(saveFile.raw);

}

}

TW.window->SetTitle(C_("title", "Property Browser"));

Platform::SettingsRef settings = Platform::GetSettings();

switch(id) {

case Command::NEW:

if(!SS.OkayToStartNewFile()) break;

SS.saveFile.Clear();

SS.NewFile();

SS.AfterNewFile();

break;

case Command::OPEN: {

if(!SS.OkayToStartNewFile()) break;

Platform::FileDialogRef dialog = Platform::CreateOpenFileDialog(SS.GW.window);

dialog->AddFilters(Platform::SolveSpaceModelFileFilters);

dialog->ThawChoices(settings, "Sketch");

if(dialog->RunModal()) {

dialog->FreezeChoices(settings, "Sketch");

SS.Load(dialog->GetFilename());

}

break;

}

case Command::SAVE:

SS.GetFilenameAndSave(/*saveAs=*/false);

break;

case Command::SAVE_AS:

SS.GetFilenameAndSave(/*saveAs=*/true);

break;

case Command::EXPORT_IMAGE: {

Platform::FileDialogRef dialog = Platform::CreateSaveFileDialog(SS.GW.window);

dialog->AddFilters(Platform::RasterFileFilters);

dialog->ThawChoices(settings, "ExportImage");

if(dialog->RunModal()) {

dialog->FreezeChoices(settings, "ExportImage");

SS.ExportAsPngTo(dialog->GetFilename());

}

break;

}

case Command::EXPORT_VIEW: {

Platform::FileDialogRef dialog = Platform::CreateSaveFileDialog(SS.GW.window);

dialog->AddFilters(Platform::VectorFileFilters);

dialog->ThawChoices(settings, "ExportView");

if(!dialog->RunModal()) break;

dialog->FreezeChoices(settings, "ExportView");

// If the user is exporting something where it would be

// inappropriate to include the constraints, then warn.

if(SS.GW.showConstraints &&

(dialog->GetFilename().HasExtension("txt") ||

fabs(SS.exportOffset) > LENGTH_EPS))

{

Message(_("Constraints are currently shown, and will be exported "

"in the toolpath. This is probably not what you want; "

"hide them by clicking the link at the top of the "

"text window."));

}

SS.ExportViewOrWireframeTo(dialog->GetFilename(), /*exportWireframe=*/false);

break;

}

case Command::EXPORT_WIREFRAME: {

Platform::FileDialogRef dialog = Platform::CreateSaveFileDialog(SS.GW.window);

dialog->AddFilters(Platform::Vector3dFileFilters);

dialog->ThawChoices(settings, "ExportWireframe");

if(!dialog->RunModal()) break;

dialog->FreezeChoices(settings, "ExportWireframe");

SS.ExportViewOrWireframeTo(dialog->GetFilename(), /*exportWireframe*/true);

break;

}

case Command::EXPORT_SECTION: {

Platform::FileDialogRef dialog = Platform::CreateSaveFileDialog(SS.GW.window);

dialog->AddFilters(Platform::VectorFileFilters);

dialog->ThawChoices(settings, "ExportSection");

if(!dialog->RunModal()) break;

dialog->FreezeChoices(settings, "ExportSection");

SS.ExportSectionTo(dialog->GetFilename());

break;

}

case Command::EXPORT_MESH: {

Platform::FileDialogRef dialog = Platform::CreateSaveFileDialog(SS.GW.window);

dialog->AddFilters(Platform::MeshFileFilters);

dialog->ThawChoices(settings, "ExportMesh");

if(!dialog->RunModal()) break;

dialog->FreezeChoices(settings, "ExportMesh");

SS.ExportMeshTo(dialog->GetFilename());

break;

}

case Command::EXPORT_SURFACES: {

Platform::FileDialogRef dialog = Platform::CreateSaveFileDialog(SS.GW.window);

dialog->AddFilters(Platform::SurfaceFileFilters);

dialog->ThawChoices(settings, "ExportSurfaces");

if(!dialog->RunModal()) break;

dialog->FreezeChoices(settings, "ExportSurfaces");

StepFileWriter sfw = {};

sfw.ExportSurfacesTo(dialog->GetFilename());

break;

}

case Command::IMPORT: {

Platform::FileDialogRef dialog = Platform::CreateOpenFileDialog(SS.GW.window);

dialog->AddFilters(Platform::ImportFileFilters);

dialog->ThawChoices(settings, "Import");

if(!dialog->RunModal()) break;

dialog->FreezeChoices(settings, "Import");

Platform::Path importFile = dialog->GetFilename();

if(importFile.HasExtension("dxf")) {

ImportDxf(importFile);

} else if(importFile.HasExtension("dwg")) {

ImportDwg(importFile);

} else {

Error(_("Can't identify file type from file extension of "

"filename '%s'; try .dxf or .dwg."), importFile.raw.c_str());

break;

}

SS.GenerateAll(SolveSpaceUI::Generate::UNTIL_ACTIVE);

SS.ScheduleShowTW();

break;

}

case Command::EXIT:

if(!SS.OkayToStartNewFile()) break;

SS.Exit();

break;

default: ssassert(false, "Unexpected menu ID");

}

SS.UpdateWindowTitles();

Platform::SettingsRef settings = Platform::GetSettings();

SS.GW.GroupSelection();

auto const &gs = SS.GW.gs;

switch(id) {

case Command::STEP_DIM:

if(gs.constraints == 1 && gs.n == 0) {

Constraint *c = SK.GetConstraint(gs.constraint[0]);

if(c->HasLabel() && !c->reference) {

SS.TW.stepDim.finish = c->valA;

SS.TW.stepDim.steps = 10;

SS.TW.stepDim.isDistance =

(c->type != Constraint::Type::ANGLE) &&

(c->type != Constraint::Type::LENGTH_RATIO) &&

(c->type != Constraint::Type::LENGTH_DIFFERENCE);

SS.TW.shown.constraint = c->h;

SS.TW.shown.screen = TextWindow::Screen::STEP_DIMENSION;

// The step params are specified in the text window,

// so force that to be shown.

SS.GW.ForceTextWindowShown();

SS.ScheduleShowTW();

SS.GW.ClearSelection();

} else {

Error(_("Constraint must have a label, and must not be "

"a reference dimension."));

}

} else {

Error(_("Bad selection for step dimension; select a constraint."));

}

break;

case Command::NAKED_EDGES: {

ShowNakedEdges(/*reportOnlyWhenNotOkay=*/false);

break;

}

case Command::INTERFERENCE: {

SS.nakedEdges.Clear();

SMesh *m = &(SK.GetGroup(SS.GW.activeGroup)->displayMesh);

SKdNode *root = SKdNode::From(m);

bool inters, leaks;

root->MakeCertainEdgesInto(&(SS.nakedEdges),

EdgeKind::SELF_INTER, /*coplanarIsInter=*/false, &inters, &leaks);

SS.GW.Invalidate();

if(inters) {

Error("%d edges interfere with other triangles, bad.",

SS.nakedEdges.l.n);

} else {

Message(_("The assembly does not interfere, good."));

}

break;

}

case Command::CENTER_OF_MASS: {

SS.UpdateCenterOfMass();

SS.centerOfMass.draw = true;

SS.GW.Invalidate();

break;

}

case Command::VOLUME: {

SMesh *m = &(SK.GetGroup(SS.GW.activeGroup)->displayMesh);

double vol = 0;

int i;

for(i = 0; i < m->l.n; i++) {

STriangle tr = m->l.elem[i];

// Translate to place vertex A at (x, y, 0)

Vector trans = Vector::From(tr.a.x, tr.a.y, 0);

tr.a = (tr.a).Minus(trans);

tr.b = (tr.b).Minus(trans);

tr.c = (tr.c).Minus(trans);

// Rotate to place vertex B on the y-axis. Depending on

// whether the triangle is CW or CCW, C is either to the

// right or to the left of the y-axis. This handles the

// sign of our normal.

Vector u = Vector::From(-tr.b.y, tr.b.x, 0);

u = u.WithMagnitude(1);

Vector v = Vector::From(tr.b.x, tr.b.y, 0);

v = v.WithMagnitude(1);

Vector n = Vector::From(0, 0, 1);

tr.a = (tr.a).DotInToCsys(u, v, n);

tr.b = (tr.b).DotInToCsys(u, v, n);

tr.c = (tr.c).DotInToCsys(u, v, n);

n = tr.Normal().WithMagnitude(1);

// Triangles on edge don't contribute

if(fabs(n.z) < LENGTH_EPS) continue;

// The plane has equation p dot n = a dot n

double d = (tr.a).Dot(n);

// nx*x + ny*y + nz*z = d

// nz*z = d - nx*x - ny*y

double A = -n.x/n.z, B = -n.y/n.z, C = d/n.z;

double mac = tr.c.y/tr.c.x, mbc = (tr.c.y - tr.b.y)/tr.c.x;

double xc = tr.c.x, yb = tr.b.y;

// I asked Maple for

// int(int(A*x + B*y +C, y=mac*x..(mbc*x + yb)), x=0..xc);

double integral =

(1.0/3)*(

A*(mbc-mac)+

(1.0/2)*B*(mbc*mbc-mac*mac)

)*(xc*xc*xc)+

(1.0/2)*(A*yb+B*yb*mbc+C*(mbc-mac))*xc*xc+

C*yb*xc+

(1.0/2)*B*yb*yb*xc;

vol += integral;

}

std::string msg = ssprintf(_("The volume of the solid model is:\n\n"

" %.3f %s^3"),

vol / pow(SS.MmPerUnit(), 3),

SS.UnitName());

if(SS.viewUnits == Unit::MM) {

msg += ssprintf("\n %.2f mL", vol/(10*10*10));

}

msg += _("\n\nCurved surfaces have been approximated as triangles.\n"

"This introduces error, typically of around 1%.");

Message("%s", msg.c_str());

break;

}

case Command::AREA: {

Group *g = SK.GetGroup(SS.GW.activeGroup);

if(g->polyError.how != PolyError::GOOD) {

Error(_("This group does not contain a correctly-formed "

"2d closed area. It is open, not coplanar, or self-"

"intersecting."));

break;

}

SEdgeList sel = {};

g->polyLoops.MakeEdgesInto(&sel);

SPolygon sp = {};

sel.AssemblePolygon(&sp, NULL, /*keepDir=*/true);

sp.normal = sp.ComputeNormal();

sp.FixContourDirections();

double area = sp.SignedArea();

double scale = SS.MmPerUnit();

Message(_("The area of the region sketched in this group is:\n\n"

" %.3f %s^2\n\n"

"Curves have been approximated as piecewise linear.\n"

"This introduces error, typically of around 1%%."),

area / (scale*scale),

SS.UnitName());

sel.Clear();

sp.Clear();

break;

}

case Command::PERIMETER: {

if(gs.n > 0 && gs.n == gs.entities) {

double perimeter = 0.0;

for(int i = 0; i < gs.entities; i++) {

Entity *e = SK.entity.FindById(gs.entity[i]);

SEdgeList *el = e->GetOrGenerateEdges();

for(const SEdge &e : el->l) {

perimeter += e.b.Minus(e.a).Magnitude();

}

}

double scale = SS.MmPerUnit();

Message(_("The total length of the selected entities is:\n\n"

" %.3f %s\n\n"

"Curves have been approximated as piecewise linear.\n"

"This introduces error, typically of around 1%%."),

perimeter / scale,

SS.UnitName());

} else {

Error(_("Bad selection for perimeter; select line segments, arcs, and curves."));

}

break;

}

case Command::SHOW_DOF:

// This works like a normal solve, except that it calculates

// which variables are free/bound at the same time.

SS.GenerateAll(SolveSpaceUI::Generate::ALL, /*andFindFree=*/true);

break;

case Command::TRACE_PT:

if(gs.points == 1 && gs.n == 1) {

SS.traced.point = gs.point[0];

SS.GW.ClearSelection();

} else {

Error(_("Bad selection for trace; select a single point."));

}

break;

case Command::STOP_TRACING: {

Platform::FileDialogRef dialog = Platform::CreateSaveFileDialog(SS.GW.window);

dialog->AddFilters(Platform::CsvFileFilters);

dialog->ThawChoices(settings, "Trace");

if(dialog->RunModal()) {

dialog->FreezeChoices(settings, "Trace");

FILE *f = OpenFile(dialog->GetFilename(), "wb");

if(f) {

int i;

SContour *sc = &(SS.traced.path);

for(i = 0; i < sc->l.n; i++) {

Vector p = sc->l.elem[i].p;

double s = SS.exportScale;

fprintf(f, "%.10f, %.10f, %.10f\r\n",

p.x/s, p.y/s, p.z/s);

}

fclose(f);

} else {

Error(_("Couldn't write to '%s'"), dialog->GetFilename().raw.c_str());

}

}

// Clear the trace, and stop tracing

SS.traced.point = Entity::NO_ENTITY;

SS.traced.path.l.Clear();

SS.GW.Invalidate();

break;

}

default: ssassert(false, "Unexpected menu ID");

}

SS.nakedEdges.Clear();

Group *g = SK.GetGroup(SS.GW.activeGroup);

SMesh *m = &(g->displayMesh);

SKdNode *root = SKdNode::From(m);

bool inters, leaks;

root->MakeCertainEdgesInto(&(SS.nakedEdges),

EdgeKind::NAKED_OR_SELF_INTER, /*coplanarIsInter=*/true, &inters, &leaks);

if(reportOnlyWhenNotOkay && !inters && !leaks && SS.nakedEdges.l.n == 0) {

return;

}

SS.GW.Invalidate();

const char *intersMsg = inters ?

_("The mesh is self-intersecting (NOT okay, invalid).") :

_("The mesh is not self-intersecting (okay, valid).");

const char *leaksMsg = leaks ?

_("The mesh has naked edges (NOT okay, invalid).") :

_("The mesh is watertight (okay, valid).");

std::string cntMsg = ssprintf(

_("\n\nThe model contains %d triangles, from %d surfaces."),

g->displayMesh.l.n, g->runningShell.surface.n);

if(SS.nakedEdges.l.n == 0) {

Message(_("%s\n\n%s\n\nZero problematic edges, good.%s"),

intersMsg, leaksMsg, cntMsg.c_str());

} else {

Error(_("%s\n\n%s\n\n%d problematic edges, bad.%s"),

intersMsg, leaksMsg, SS.nakedEdges.l.n, cntMsg.c_str());

}

switch(id) {

case Command::WEBSITE:

Platform::OpenInBrowser("http://solvespace.com/helpmenu");

break;

case Command::ABOUT:

Message(_(

"This is SolveSpace version " PACKAGE_VERSION ".\n"

));

break;

default: ssassert(false, "Unexpected menu ID");

}

sys.Clear();

for(int i = 0; i < MAX_UNDO; i++) {

if(i < undo.cnt) undo.d[i].Clear();

if(i < redo.cnt) redo.d[i].Clear();

}

TW.window = NULL;

GW.openRecentMenu = NULL;

GW.linkRecentMenu = NULL;

GW.showGridMenuItem = NULL;

GW.perspectiveProjMenuItem = NULL;

GW.showToolbarMenuItem = NULL;

GW.showTextWndMenuItem = NULL;

GW.fullScreenMenuItem = NULL;

GW.unitsMmMenuItem = NULL;

GW.unitsMetersMenuItem = NULL;

GW.unitsInchesMenuItem = NULL;

GW.inWorkplaneMenuItem = NULL;

GW.in3dMenuItem = NULL;

GW.undoMenuItem = NULL;

GW.redoMenuItem = NULL;

GW.window = NULL;

group.Clear();

groupOrder.Clear();

constraint.Clear();

request.Clear();

style.Clear();

entity.Clear();

param.Clear();

BBox box = {};

bool first = true;

auto includePoint = [&](const Vector &point) {

if(first) {

box.minp = point;

box.maxp = point;

first = false;

} else {

box.Include(point);

}

};

for(const Entity &e : entity) {

if(e.construction) continue;

if(!(includingInvisible || e.IsVisible())) continue;

if(e.IsPoint()) {

includePoint(e.PointGetNum());

continue;

}

switch(e.type) {