UndoClearStack(&redo);

UndoClearStack(&undo);

for(hGroup hg : SK.groupOrder) {

Group *g = SK.GetGroup(hg);

g->Clear();

}

SK.constraint.Clear();

SK.request.Clear();

SK.group.Clear();

SK.groupOrder.Clear();

SK.style.Clear();

SK.entity.Clear();

SK.param.Clear();

images.clear();

Group g = {};

// And an empty group, for the first stuff the user draws.

g.visible = true;

g.name = C_("group-name", "sketch-in-plane");

g.type = Group::Type::DRAWING_WORKPLANE;

g.subtype = Group::Subtype::WORKPLANE_BY_POINT_ORTHO;

g.order = 1;

g.predef.q = Quaternion::From(1, 0, 0, 0);

hRequest hr = Request::HREQUEST_REFERENCE_XY;

g.predef.origin = hr.entity(1);

SK.group.AddAndAssignId(&g);

SK.GetGroup(g.h)->activeWorkplane = g.h.entity(0);

return g.h;

ClearExisting();

// Our initial group, that contains the references.

Group g = {};

g.visible = true;

g.name = C_("group-name", "#references");

g.type = Group::Type::DRAWING_3D;

g.order = 0;

g.h = Group::HGROUP_REFERENCES;

SK.group.Add(&g);

// Let's create three two-d coordinate systems, for the coordinate

// planes; these are our references, present in every sketch.

Request r = {};

r.type = Request::Type::WORKPLANE;

r.group = Group::HGROUP_REFERENCES;

r.workplane = Entity::FREE_IN_3D;

r.h = Request::HREQUEST_REFERENCE_XY;

SK.request.Add(&r);

r.h = Request::HREQUEST_REFERENCE_YZ;

SK.request.Add(&r);

r.h = Request::HREQUEST_REFERENCE_ZX;

SK.request.Add(&r);

CreateDefaultDrawingGroup();

EntityMap &M() { return *((EntityMap *)this); }

std::string &S() { return *((std::string *)this); }

Platform::Path &P() { return *((Platform::Path *)this); }

bool &b() { return *((bool *)this); }

RgbaColor &c() { return *((RgbaColor *)this); }

int &d() { return *((int *)this); }

double &f() { return *((double *)this); }

uint32_t &x() { return *((uint32_t *)this); }

int i;

for(i = 0; SAVED[i].type != 0; i++) {

if(SAVED[i].type != type) continue;

int fmt = SAVED[i].fmt;

SAVEDptr *p = (SAVEDptr *)SAVED[i].ptr;

// Any items that aren't specified are assumed to be zero

if(fmt == 'S' && p->S().empty()) continue;

if(fmt == 'P' && p->P().IsEmpty()) continue;

if(fmt == 'd' && p->d() == 0) continue;

if(fmt == 'f' && EXACT(p->f() == 0.0)) continue;

if(fmt == 'x' && p->x() == 0) continue;

if(fmt == 'i') continue;

fprintf(fh, "%s=", SAVED[i].desc);

switch(fmt) {

case 'S': fprintf(fh, "%s", p->S().c_str()); break;

case 'b': fprintf(fh, "%d", p->b() ? 1 : 0); break;

case 'c': fprintf(fh, "%08x", p->c().ToPackedInt()); break;

case 'd': fprintf(fh, "%d", p->d()); break;

case 'f': fprintf(fh, "%.20f", p->f()); break;

case 'x': fprintf(fh, "%08x", p->x()); break;

case 'P': {

if(!p->P().IsEmpty()) {

Platform::Path relativePath = p->P().RelativeTo(filename.Parent());

ssassert(!relativePath.IsEmpty(), "Cannot relativize path");

fprintf(fh, "%s", relativePath.ToPortable().c_str());

}

break;

}

case 'M': {

fprintf(fh, "{\n");

// Sort the mapping, since EntityMap is not deterministic.

std::vector<std::pair<EntityKey, EntityId>> sorted(p->M().begin(), p->M().end());

std::sort(sorted.begin(), sorted.end(),

[](std::pair<EntityKey, EntityId> &a, std::pair<EntityKey, EntityId> &b) {

return a.second.v < b.second.v;

});

for(auto it : sorted) {

fprintf(fh, " %d %08x %d\n",

it.second.v, it.first.input.v, it.first.copyNumber);

}

fprintf(fh, "}");

break;

}

case 'i': break;

default: ssassert(false, "Unexpected value format");

}

fprintf(fh, "\n");

}

// Make sure all the entities are regenerated up to date, since they will be exported.

SS.ScheduleShowTW();

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

for(Group &g : SK.group) {

if(g.type != Group::Type::LINKED) continue;

if(g.linkFile.RelativeTo(filename).IsEmpty()) {

Error("This sketch links the sketch '%s'; it can only be saved "

"on the same volume.", g.linkFile.raw.c_str());

return false;

}

}

fh = OpenFile(filename, "wb");

if(!fh) {

Error("Couldn't write to file '%s'", filename.raw.c_str());

return false;

}

fprintf(fh, "%s\n\n\n", VERSION_STRING);

int i, j;

for(auto &g : SK.group) {

sv.g = g;

SaveUsingTable(filename, 'g');

fprintf(fh, "AddGroup\n\n");

}

for(auto &p : SK.param) {

sv.p = p;

SaveUsingTable(filename, 'p');

fprintf(fh, "AddParam\n\n");

}

for(auto &r : SK.request) {

sv.r = r;

SaveUsingTable(filename, 'r');

fprintf(fh, "AddRequest\n\n");

}

for(auto &e : SK.entity) {

e.CalculateNumerical(/*forExport=*/true);

sv.e = e;

SaveUsingTable(filename, 'e');

fprintf(fh, "AddEntity\n\n");

}

for(auto &c : SK.constraint) {

sv.c = c;

SaveUsingTable(filename, 'c');

fprintf(fh, "AddConstraint\n\n");

}

for(auto &s : SK.style) {

sv.s = s;

if(sv.s.h.v >= Style::FIRST_CUSTOM) {

SaveUsingTable(filename, 's');

fprintf(fh, "AddStyle\n\n");

}

}

// A group will have either a mesh or a shell, but not both; but the code

// to print either of those just does nothing if the mesh/shell is empty.

Group *g = SK.GetGroup(*SK.groupOrder.Last());

SMesh *m = &g->runningMesh;

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

STriangle *tr = &(m->l[i]);

fprintf(fh, "Triangle %08x %08x "

"%.20f %.20f %.20f %.20f %.20f %.20f %.20f %.20f %.20f\n",

tr->meta.face, tr->meta.color.ToPackedInt(),

CO(tr->a), CO(tr->b), CO(tr->c));

}

SShell *s = &g->runningShell;

for(SSurface &srf : s->surface) {

fprintf(fh, "Surface %08x %08x %08x %d %d\n",

srf.h.v, srf.color.ToPackedInt(), srf.face, srf.degm, srf.degn);

for(i = 0; i <= srf.degm; i++) {

for(j = 0; j <= srf.degn; j++) {

fprintf(fh, "SCtrl %d %d %.20f %.20f %.20f Weight %20.20f\n",

i, j, CO(srf.ctrl[i][j]), srf.weight[i][j]);

}

}

STrimBy *stb;

for(stb = srf.trim.First(); stb; stb = srf.trim.NextAfter(stb)) {

fprintf(fh, "TrimBy %08x %d %.20f %.20f %.20f %.20f %.20f %.20f\n",

stb->curve.v, stb->backwards ? 1 : 0,

CO(stb->start), CO(stb->finish));

}

fprintf(fh, "AddSurface\n");

}

for(SCurve &sc : s->curve) {

fprintf(fh, "Curve %08x %d %d %08x %08x\n",

sc.h.v,

sc.isExact ? 1 : 0, sc.exact.deg,

sc.surfA.v, sc.surfB.v);

if(sc.isExact) {

for(i = 0; i <= sc.exact.deg; i++) {

fprintf(fh, "CCtrl %d %.20f %.20f %.20f Weight %.20f\n",

i, CO(sc.exact.ctrl[i]), sc.exact.weight[i]);

}

}

SCurvePt *scpt;

for(scpt = sc.pts.First(); scpt; scpt = sc.pts.NextAfter(scpt)) {

fprintf(fh, "CurvePt %d %.20f %.20f %.20f\n",

scpt->vertex ? 1 : 0, CO(scpt->p));

}

fprintf(fh, "AddCurve\n");

}

fclose(fh);

return true;

int i;

for(i = 0; SAVED[i].type != 0; i++) {

if(strcmp(SAVED[i].desc, key)==0) {

SAVEDptr *p = (SAVEDptr *)SAVED[i].ptr;

unsigned int u = 0;

switch(SAVED[i].fmt) {

case 'S': p->S() = val; break;

case 'b': p->b() = (atoi(val) != 0); break;

case 'd': p->d() = atoi(val); break;

case 'f': p->f() = atof(val); break;

case 'x': sscanf(val, "%x", &u); p->x()= u; break;

case 'P': {

Platform::Path path = Platform::Path::FromPortable(val);

if(!path.IsEmpty()) {

p->P() = filename.Parent().Join(path).Expand();

}

break;

}

case 'c':

sscanf(val, "%x", &u);

p->c() = RgbaColor::FromPackedInt(u);

break;

case 'M': {

p->M().clear();

for(;;) {

EntityKey ek;

EntityId ei;

char line2[1024];

if (fgets(line2, (int)sizeof(line2), fh) == NULL)

break;

if(sscanf(line2, "%d %x %d", &(ei.v), &(ek.input.v),

&(ek.copyNumber)) == 3) {

if(ei.v == Entity::NO_ENTITY.v) {

// Commit bd84bc1a mistakenly introduced code that would remap

// some entities to NO_ENTITY. This was fixed in commit bd84bc1a,

// but files created meanwhile are corrupt, and can cause crashes.

//

// To fix this, we skip any such remaps when loading; they will be

// recreated on the next regeneration. Any resulting orphans will

// be pruned in the usual way, recovering to a well-defined state.

continue;

}

p->M().insert({ ek, ei });

} else {

break;

}

}

break;

}

case 'i': break;

default: ssassert(false, "Unexpected value format");

}

break;

}

}

if(SAVED[i].type == 0) {

fileLoadError = true;

}

bool fileIsEmpty = true;

allConsistent = false;

fileLoadError = false;

fh = OpenFile(filename, "rb");

if(!fh) {

Error("Couldn't read from file '%s'", filename.raw.c_str());

return false;

}

ClearExisting();

sv = {};

sv.g.scale = 1; // default is 1, not 0; so legacy files need this

Style::FillDefaultStyle(&sv.s);

char line[1024];

while(fgets(line, (int)sizeof(line), fh)) {

fileIsEmpty = false;

char *s = strchr(line, '\n');

if(s) *s = '\0';

// We should never get files with \r characters in them, but mailers

// will sometimes mangle attachments.

s = strchr(line, '\r');

if(s) *s = '\0';

if(*line == '\0') continue;

char *e = strchr(line, '=');

if(e) {

*e = '\0';

char *key = line, *val = e+1;

LoadUsingTable(filename, key, val);

} else if(strcmp(line, "AddGroup")==0) {

// legacy files have a spurious dependency between linked groups

// and their parent groups, remove

if(sv.g.type == Group::Type::LINKED)

sv.g.opA.v = 0;

SK.group.Add(&(sv.g));

sv.g = {};

sv.g.scale = 1; // default is 1, not 0; so legacy files need this

} else if(strcmp(line, "AddParam")==0) {

// params are regenerated, but we want to preload the values

// for initial guesses

SK.param.Add(&(sv.p));

sv.p = {};

} else if(strcmp(line, "AddEntity")==0) {

// entities are regenerated

} else if(strcmp(line, "AddRequest")==0) {

SK.request.Add(&(sv.r));

sv.r = {};

} else if(strcmp(line, "AddConstraint")==0) {

SK.constraint.Add(&(sv.c));

sv.c = {};

} else if(strcmp(line, "AddStyle")==0) {

SK.style.Add(&(sv.s));

sv.s = {};

Style::FillDefaultStyle(&sv.s);

} else if(strcmp(line, VERSION_STRING)==0) {

// do nothing, version string

} else if(StrStartsWith(line, "Triangle ") ||

StrStartsWith(line, "Surface ") ||

StrStartsWith(line, "SCtrl ") ||

StrStartsWith(line, "TrimBy ") ||

StrStartsWith(line, "Curve ") ||

StrStartsWith(line, "CCtrl ") ||

StrStartsWith(line, "CurvePt ") ||

strcmp(line, "AddSurface")==0 ||

strcmp(line, "AddCurve")==0)

{

// ignore the mesh or shell, since we regenerate that

} else {

fileLoadError = true;

}

}

fclose(fh);

if(fileIsEmpty) {

Error(_("The file is empty. It may be corrupt."));

NewFile();

}

if(fileLoadError) {

Error(_("Unrecognized data in file. This file may be corrupt, or "

"from a newer version of the program."));

// At least leave the program in a non-crashing state.

if(SK.group.IsEmpty()) {

NewFile();

}

}

if(!ReloadAllLinked(filename, canCancel)) {

return false;

}

UpgradeLegacyData();

return true;

for(Request &r : SK.request) {

switch(r.type) {

// TTF text requests saved in versions prior to 3.0 only have two

// reference points (origin and origin plus v); version 3.0 adds two

// more points, and if we don't do anything, then they will appear

// at workplane origin, and the solver will mess up the sketch if

// it is not fully constrained.

case Request::Type::TTF_TEXT: {

IdList<Entity,hEntity> entity = {};

IdList<Param,hParam> param = {};

r.Generate(&entity, &param);

// If we didn't load all of the entities and params that this

// request would generate, then add them now, so that we can

// force them to their appropriate positions.

for(Param &p : param) {

if(SK.param.FindByIdNoOops(p.h) != NULL) continue;

SK.param.Add(&p);

}

bool allPointsExist = true;

for(Entity &e : entity) {

if(SK.entity.FindByIdNoOops(e.h) != NULL) continue;

SK.entity.Add(&e);

allPointsExist = false;

}

if(!allPointsExist) {

Entity *text = entity.FindById(r.h.entity(0));

Entity *b = entity.FindById(text->point[2]);

Entity *c = entity.FindById(text->point[3]);

ExprVector bex, cex;

text->RectGetPointsExprs(&bex, &cex);

b->PointForceParamTo(bex.Eval());

c->PointForceParamTo(cex.Eval());

}

entity.Clear();

param.Clear();

break;

}

default:

break;

}

}

// Constraints saved in versions prior to 3.0 never had any params;

// version 3.0 introduced params to constraints to avoid the hairy ball problem,

// so force them where they belong.

IdList<Param,hParam> oldParam = {};

SK.param.DeepCopyInto(&oldParam);

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

auto AllParamsExistFor = [&](Constraint &c) {

IdList<Param,hParam> param = {};

c.Generate(&param);

bool allParamsExist = true;

for(Param &p : param) {

if(oldParam.FindByIdNoOops(p.h) != NULL) continue;

allParamsExist = false;

break;

}

param.Clear();

return allParamsExist;

};

for(Constraint &c : SK.constraint) {

switch(c.type) {

case Constraint::Type::PT_ON_LINE: {

if(AllParamsExistFor(c)) continue;

EntityBase *eln = SK.GetEntity(c.entityA);

EntityBase *ea = SK.GetEntity(eln->point[0]);

EntityBase *eb = SK.GetEntity(eln->point[1]);

EntityBase *ep = SK.GetEntity(c.ptA);

ExprVector exp = ep->PointGetExprsInWorkplane(c.workplane);

ExprVector exa = ea->PointGetExprsInWorkplane(c.workplane);

ExprVector exb = eb->PointGetExprsInWorkplane(c.workplane);

ExprVector exba = exb.Minus(exa);

Param *p = SK.GetParam(c.h.param(0));

p->val = exba.Dot(exp.Minus(exa))->Eval() / exba.Dot(exba)->Eval();

break;

}

case Constraint::Type::CUBIC_LINE_TANGENT: {

if(AllParamsExistFor(c)) continue;

EntityBase *cubic = SK.GetEntity(c.entityA);

EntityBase *line = SK.GetEntity(c.entityB);

ExprVector a;

if(c.other) {

a = cubic->CubicGetFinishTangentExprs();

} else {

a = cubic->CubicGetStartTangentExprs();

}

ExprVector b = line->VectorGetExprs();

Param *param = SK.GetParam(c.h.param(0));

param->val = a.Dot(b)->Eval() / b.Dot(b)->Eval();

break;

}

case Constraint::Type::SAME_ORIENTATION: {

if(AllParamsExistFor(c)) continue;

EntityBase *an = SK.GetEntity(c.entityA);

EntityBase *bn = SK.GetEntity(c.entityB);

ExprVector a = an->NormalExprsN();

ExprVector b = bn->NormalExprsN();

Param *param = SK.GetParam(c.h.param(0));

param->val = a.Dot(b)->Eval() / b.Dot(b)->Eval();

break;

}

case Constraint::Type::PARALLEL: {

if(AllParamsExistFor(c)) continue;

EntityBase *ea = SK.GetEntity(c.entityA),

*eb = SK.GetEntity(c.entityB);

ExprVector a = ea->VectorGetExprsInWorkplane(c.workplane);

ExprVector b = eb->VectorGetExprsInWorkplane(c.workplane);

Param *param = SK.GetParam(c.h.param(0));

param->val = a.Dot(b)->Eval() / b.Dot(b)->Eval();

break;

}

default:

break;

}

}

oldParam.Clear();

SMesh *m, SShell *sh)

{

if(strcmp(filename.Extension().c_str(), "emn")==0) {

return LinkIDF(filename, le, m, sh);

} else if(strcmp(filename.Extension().c_str(), "stl")==0) {

return LinkStl(filename, le, m, sh);

} else {

return LoadEntitiesFromSlvs(filename, le, m, sh);

}

SMesh *m, SShell *sh)

{

SSurface srf = {};

SCurve crv = {};

fh = OpenFile(filename, "rb");

if(!fh) return false;

le->Clear();

sv = {};

char line[1024];

while(fgets(line, (int)sizeof(line), fh)) {

char *s = strchr(line, '\n');

if(s) *s = '\0';

// We should never get files with \r characters in them, but mailers

// will sometimes mangle attachments.

s = strchr(line, '\r');

if(s) *s = '\0';

if(*line == '\0') continue;

char *e = strchr(line, '=');

if(e) {

*e = '\0';

char *key = line, *val = e+1;

LoadUsingTable(filename, key, val);

} else if(strcmp(line, "AddGroup")==0) {

// These get allocated whether we want them or not.

sv.g.remap.clear();

} else if(strcmp(line, "AddParam")==0) {

} else if(strcmp(line, "AddEntity")==0) {

le->Add(&(sv.e));

sv.e = {};

} else if(strcmp(line, "AddRequest")==0) {

} else if(strcmp(line, "AddConstraint")==0) {

} else if(strcmp(line, "AddStyle")==0) {

// Linked file contains a style that we don't have yet,

// so import it.

if (SK.style.FindByIdNoOops(sv.s.h) == nullptr) {

SK.style.Add(&(sv.s));

}

sv.s = {};

Style::FillDefaultStyle(&sv.s);

} else if(strcmp(line, VERSION_STRING)==0) {

} else if(StrStartsWith(line, "Triangle ")) {

STriangle tr = {};

unsigned int rgba = 0;

if(sscanf(line, "Triangle %x %x "

"%lf %lf %lf %lf %lf %lf %lf %lf %lf",

&(tr.meta.face), &rgba,

&(tr.a.x), &(tr.a.y), &(tr.a.z),

&(tr.b.x), &(tr.b.y), &(tr.b.z),

&(tr.c.x), &(tr.c.y), &(tr.c.z)) != 11) {

ssassert(false, "Unexpected Triangle format");

}

tr.meta.color = RgbaColor::FromPackedInt((uint32_t)rgba);

m->AddTriangle(&tr);

} else if(StrStartsWith(line, "Surface ")) {

unsigned int rgba = 0;

if(sscanf(line, "Surface %x %x %x %d %d",

&(srf.h.v), &rgba, &(srf.face),

&(srf.degm), &(srf.degn)) != 5) {

ssassert(false, "Unexpected Surface format");

}

srf.color = RgbaColor::FromPackedInt((uint32_t)rgba);

} else if(StrStartsWith(line, "SCtrl ")) {

int i, j;

Vector c;

double w;

if(sscanf(line, "SCtrl %d %d %lf %lf %lf Weight %lf",

&i, &j, &(c.x), &(c.y), &(c.z), &w) != 6)

{

ssassert(false, "Unexpected SCtrl format");

}

srf.ctrl[i][j] = c;

srf.weight[i][j] = w;

} else if(StrStartsWith(line, "TrimBy ")) {

STrimBy stb = {};

int backwards;

if(sscanf(line, "TrimBy %x %d %lf %lf %lf %lf %lf %lf",

&(stb.curve.v), &backwards,

&(stb.start.x), &(stb.start.y), &(stb.start.z),

&(stb.finish.x), &(stb.finish.y), &(stb.finish.z)) != 8)

{

ssassert(false, "Unexpected TrimBy format");

}

stb.backwards = (backwards != 0);

srf.trim.Add(&stb);

} else if(strcmp(line, "AddSurface")==0) {

sh->surface.Add(&srf);

srf = {};

} else if(StrStartsWith(line, "Curve ")) {

int isExact;

if(sscanf(line, "Curve %x %d %d %x %x",

&(crv.h.v),

&(isExact),

&(crv.exact.deg),

&(crv.surfA.v), &(crv.surfB.v)) != 5)

{

ssassert(false, "Unexpected Curve format");

}

crv.isExact = (isExact != 0);

} else if(StrStartsWith(line, "CCtrl ")) {

int i;

Vector c;

double w;

if(sscanf(line, "CCtrl %d %lf %lf %lf Weight %lf",

&i, &(c.x), &(c.y), &(c.z), &w) != 5)

{

ssassert(false, "Unexpected CCtrl format");

}

crv.exact.ctrl[i] = c;

crv.exact.weight[i] = w;

} else if(StrStartsWith(line, "CurvePt ")) {

SCurvePt scpt;

int vertex;

if(sscanf(line, "CurvePt %d %lf %lf %lf",

&vertex,

&(scpt.p.x), &(scpt.p.y), &(scpt.p.z)) != 4)

{

ssassert(false, "Unexpected CurvePt format");

}

scpt.vertex = (vertex != 0);

crv.pts.Add(&scpt);

} else if(strcmp(line, "AddCurve")==0) {

sh->curve.Add(&crv);

crv = {};

} else ssassert(false, "Unexpected operation");

}

fclose(fh);

return true;

bool canCancel) {

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

using Platform::MessageDialog;

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

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

dialog->SetMessage(ssprintf(C_("dialog", "The linked file “%s” is not present."),

filename.raw.c_str()));

dialog->SetDescription(C_("dialog", "Do you want to locate it manually?\n\n"

"If you decline, any geometry that depends on "

"the missing file will be permanently removed."));

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

/*isDefault=*/true);

dialog->AddButton(C_("button", "&No"), MessageDialog::Response::NO);

if(canCancel) {

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

}

// FIXME(async): asyncify this call

return dialog->RunModal();

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

std::map<Platform::Path, Platform::Path, Platform::PathLess> linkMap;

allConsistent = false;

for(Group &g : SK.group) {

if(g.type != Group::Type::LINKED) continue;

g.impEntity.Clear();

g.impMesh.Clear();

g.impShell.Clear();

// If we prompted for this specific file before, don't ask again.

if(linkMap.count(g.linkFile)) {

g.linkFile = linkMap[g.linkFile];

}

try_again:

if(LoadEntitiesFromFile(g.linkFile, &g.impEntity, &g.impMesh, &g.impShell)) {

// We loaded the data, good. Now import its dependencies as well.

for(Entity &e : g.impEntity) {

if(e.type != Entity::Type::IMAGE) continue;

if(!ReloadLinkedImage(g.linkFile, &e.file, canCancel)) {

return false;

}

}

if(g.IsTriangleMeshAssembly())

g.forceToMesh = true;

} else if(linkMap.count(g.linkFile) == 0) {

dbp("Missing file for group: %s", g.name.c_str());

// The file was moved; prompt the user for its new location.

const auto linkFileRelative = g.linkFile.RelativeTo(saveFile);

switch(LocateImportedFile(linkFileRelative, canCancel)) {

case Platform::MessageDialog::Response::YES: {

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

dialog->AddFilters(Platform::SolveSpaceLinkFileFilters);

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

dialog->SuggestFilename(linkFileRelative);

if(dialog->RunModal()) {

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

linkMap[g.linkFile] = dialog->GetFilename();

g.linkFile = dialog->GetFilename();

goto try_again;

} else {

if(canCancel) return false;

break;

}

}

case Platform::MessageDialog::Response::NO:

linkMap[g.linkFile].Clear();

// Geometry will be pruned by GenerateAll().

break;

case Platform::MessageDialog::Response::CANCEL:

return false;

default:

ssassert(false, "Unexpected dialog response");

}

} else {

// User was already asked to and refused to locate a missing linked file.

}

}

for(Request &r : SK.request) {

if(r.type != Request::Type::IMAGE) continue;

if(!ReloadLinkedImage(saveFile, &r.file, canCancel)) {

return false;

}

}

return true;

Platform::Path *filename, bool canCancel) {

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

std::shared_ptr<Pixmap> pixmap;

bool promptOpenFile = false;

if(filename->IsEmpty()) {

// We're prompting the user for a new image.

promptOpenFile = true;

} else {

auto image = SS.images.find(*filename);

if(image != SS.images.end()) return true;

pixmap = Pixmap::ReadPng(*filename);

if(pixmap == NULL) {

// The file was moved; prompt the user for its new location.

switch(LocateImportedFile(filename->RelativeTo(saveFile), canCancel)) {

case Platform::MessageDialog::Response::YES:

promptOpenFile = true;

break;

case Platform::MessageDialog::Response::NO:

// We don't know where the file is, record it as absent.

break;

case Platform::MessageDialog::Response::CANCEL:

return false;

default:

ssassert(false, "Unexpected dialog response");

}

}

}

if(promptOpenFile) {

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

dialog->AddFilters(Platform::RasterFileFilters);

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

dialog->SuggestFilename(filename->RelativeTo(saveFile));