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solvespace/src/importdxf.cpp

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#include "solvespace.h"
#include "libdxfrw.h"
#include "libdwgr.h"
namespace SolveSpace {
static std::string ToUpper(std::string str) {
std::transform(str.begin(), str.end(), str.begin(), ::toupper);
return str;
}
class DxfImport : public DRW_Interface {
public:
Vector blockX;
Vector blockY;
Vector blockZ;
Vector blockT;
void invertXTransform() {
blockX.x = -blockX.x;
blockY.x = -blockY.x;
blockT.x = -blockT.x;
}
void multBlockTransform(double x, double y, double sx, double sy, double angle) {
Vector oldX = blockX;
Vector oldY = blockY;
Vector oldT = blockT;
Vector newX = Vector::From(sx, 0.0, 0.0).RotatedAbout(Vector::From(0.0, 0.0, 1.0), angle);
Vector newY = Vector::From(0.0, sy, 0.0).RotatedAbout(Vector::From(0.0, 0.0, 1.0), angle);
Vector newT = Vector::From(x, y, 0.0);
blockX = oldX.ScaledBy(newX.x).Plus(
oldY.ScaledBy(newX.y));
blockY = oldX.ScaledBy(newY.x).Plus(
oldY.ScaledBy(newY.y));
blockT = oldX.ScaledBy(newT.x).Plus(
oldY.ScaledBy(newT.y)).Plus(oldT);
}
void clearBlockTransform() {
blockX = Vector::From(1.0, 0.0, 0.0);
blockY = Vector::From(0.0, 1.0, 0.0);
blockZ = Vector::From(0.0, 0.0, 1.0);
blockT = Vector::From(0.0, 0.0, 0.0);
}
Vector blockTransform(Vector v) {
Vector r = blockT;
r = r.Plus(blockX.ScaledBy(v.x));
r = r.Plus(blockY.ScaledBy(v.y));
r = r.Plus(blockZ.ScaledBy(v.z));
return r;
}
void blockTransformArc(Vector *c, Vector *p0, Vector *p1) {
bool oldSign = p0->Minus(*c).Cross(p1->Minus(*c)).z > 0.0;
*c = blockTransform(*c);
*p0 = blockTransform(*p0);
*p1 = blockTransform(*p1);
bool newSign = p0->Minus(*c).Cross(p1->Minus(*c)).z > 0.0;
if(oldSign != newSign) std::swap(*p0, *p1);
}
Vector toVector(const DRW_Coord &c, bool transform = true) {
Vector result = Vector::From(c.x, c.y, c.z);
if(transform) return blockTransform(result);
return result;
}
Vector toVector(const DRW_Vertex2D &c) {
Vector result = Vector::From(c.x, c.y, 0.0);
return blockTransform(result);
}
Vector toVector(const DRW_Vertex &c) {
Vector result = Vector::From(c.basePoint.x, c.basePoint.y, c.basePoint.z);
return blockTransform(result);
}
double angleTo(Vector v0, Vector v1) {
Vector d = v1.Minus(v0);
double a = atan2(d.y, d.x);
return M_PI + remainder(a - M_PI, 2 * M_PI);
}
Vector polar(double radius, double angle) {
return Vector::From(radius * cos(angle), radius * sin(angle), 0.0);
}
hRequest createBulge(Vector p0, Vector p1, double bulge) {
bool reversed = bulge < 0.0;
double alpha = atan(bulge) * 4.0;
Vector middle = p1.Plus(p0).ScaledBy(0.5);
double dist = p1.Minus(p0).Magnitude() / 2.0;
double angle = angleTo(p0, p1);
// alpha can't be 0.0 at this point
double radius = fabs(dist / sin(alpha / 2.0));
double wu = fabs(radius * radius - dist * dist);
double h = sqrt(wu);
if(bulge > 0.0) {
angle += M_PI_2;
} else {
angle -= M_PI_2;
}
if (fabs(alpha) > M_PI) {
h *= -1.0;
}
Vector center = polar(h, angle);
center = center.Plus(middle);
if(reversed) std::swap(p0, p1);
blockTransformArc(&center, &p0, &p1);
hRequest hr = SS.GW.AddRequest(Request::Type::ARC_OF_CIRCLE, /*rememberForUndo=*/false);
SK.GetEntity(hr.entity(1))->PointForceTo(center);
SK.GetEntity(hr.entity(2))->PointForceTo(p0);
SK.GetEntity(hr.entity(3))->PointForceTo(p1);
processPoint(hr.entity(1));
processPoint(hr.entity(2));
processPoint(hr.entity(3));
return hr;
}
struct Block {
std::vector<std::unique_ptr<DRW_Entity>> entities;
DRW_Block data;
};
bool asConstruction = false;
unsigned unknownEntities = 0;
std::map<std::string, hStyle> styles;
std::map<std::string, Block> blocks;
std::map<std::string, DRW_Layer> layers;
Block *readBlock = NULL;
const DRW_Insert *insertInsert = NULL;
template<class T>
bool addPendingBlockEntity(const T &e) {
if(readBlock == NULL) return false;
readBlock->entities.emplace_back(new T(e));
return true;
}
void addEntity(DRW_Entity *e) {
switch(e->eType) {
case DRW::POINT:
addPoint(*static_cast<DRW_Point *>(e));
break;
case DRW::LINE:
addLine(*static_cast<DRW_Line *>(e));
break;
case DRW::ARC:
addArc(*static_cast<DRW_Arc *>(e));
break;
case DRW::CIRCLE:
addCircle(*static_cast<DRW_Circle *>(e));
break;
case DRW::POLYLINE:
addPolyline(*static_cast<DRW_Polyline *>(e));
break;
case DRW::LWPOLYLINE:
addLWPolyline(*static_cast<DRW_LWPolyline *>(e));
break;
case DRW::SPLINE:
addSpline(static_cast<DRW_Spline *>(e));
break;
case DRW::INSERT:
addInsert(*static_cast<DRW_Insert *>(e));
break;
case DRW::TEXT:
addText(*static_cast<DRW_Text *>(e));
break;
case DRW::MTEXT:
addMText(*static_cast<DRW_MText *>(e));
break;
case DRW::DIMALIGNED:
addDimAlign(static_cast<DRW_DimAligned *>(e));
break;
case DRW::DIMLINEAR:
addDimLinear(static_cast<DRW_DimLinear *>(e));
break;
case DRW::DIMRADIAL:
addDimRadial(static_cast<DRW_DimRadial *>(e));
break;
case DRW::DIMDIAMETRIC:
addDimDiametric(static_cast<DRW_DimDiametric *>(e));
break;
case DRW::DIMANGULAR:
addDimAngular(static_cast<DRW_DimAngular *>(e));
break;
default:
unknownEntities++;
}
}
Style::TextOrigin dxfAlignToOrigin(DRW_Text::HAlign alignH, DRW_Text::VAlign alignV) {
uint32_t origin = 0;
switch(alignH) {
case DRW_Text::HLeft:
origin |= (uint32_t)Style::TextOrigin::LEFT;
break;
case DRW_Text::HMiddle:
case DRW_Text::HCenter:
break;
case DRW_Text::HRight:
origin |= (uint32_t)Style::TextOrigin::RIGHT;
break;
case DRW_Text::HAligned:
case DRW_Text::HFit:
default:
origin |= (uint32_t)Style::TextOrigin::LEFT;
break;
}
switch(alignV) {
case DRW_Text::VBaseLine:
case DRW_Text::VBottom:
origin |= (uint32_t)Style::TextOrigin::BOT;
break;
case DRW_Text::VMiddle:
break;
case DRW_Text::VTop:
origin |= (uint32_t)Style::TextOrigin::TOP;
break;
default:
origin |= (uint32_t)Style::TextOrigin::BOT;
break;
}
return (Style::TextOrigin)origin;
}
DRW_Layer *getSourceLayer(const DRW_Entity *e) {
DRW_Layer *layer = NULL;
if(insertInsert != NULL) {
std::string l = insertInsert->layer;
auto bi = layers.find(l);
if(bi != layers.end()) layer = &bi->second;
} else {
std::string l = e->layer;
auto bi = layers.find(l);
if(bi != layers.end()) layer = &bi->second;
}
return layer;
}
int getColor(const DRW_Entity *e) {
int col = e->color;
if(col == DRW::ColorByBlock) {
if(insertInsert != NULL) {
col = insertInsert->color;
} else {
col = 7;
}
}
if(col == DRW::ColorByLayer) {
DRW_Layer *layer = getSourceLayer(e);
if(layer != NULL) {
col = layer->color;
} else {
col = 7;
}
}
return col;
}
DRW_LW_Conv::lineWidth getLineWidth(const DRW_Entity *e) {
DRW_LW_Conv::lineWidth result = e->lWeight;
if(result == DRW_LW_Conv::widthByBlock) {
if(insertInsert != NULL) {
result = insertInsert->lWeight;
} else {
result = DRW_LW_Conv::widthDefault;
}
}
if(result == DRW_LW_Conv::widthByLayer) {
DRW_Layer *layer = getSourceLayer(e);
if(layer != NULL) {
result = layer->lWeight;
} else {
result = DRW_LW_Conv::widthDefault;
}
}
return result;
}
std::string getLineType(const DRW_Entity *e) {
std::string result = e->lineType;
if(result == "BYBLOCK") {
if(insertInsert != NULL) {
result = ToUpper(insertInsert->lineType);
} else {
result = "CONTINUOUS";
}
}
if(result == "BYLAYER") {
DRW_Layer *layer = getSourceLayer(e);
if(layer != NULL) {
result = ToUpper(layer->lineType);
} else {
result = "CONTINUOUS";
}
}
return result;
}
hStyle invisibleStyle() {
std::string id = "@dxf-invisible";
auto si = styles.find(id);
if(si != styles.end()) {
return si->second;
}
hStyle hs = { Style::CreateCustomStyle(/*rememberForUndo=*/false) };
Style *s = Style::Get(hs);
s->name = id;
s->visible = false;
styles.emplace(id, hs);
return hs;
}
hStyle styleFor(const DRW_Entity *e) {
// Color.
//! @todo which color to choose: index or RGB one?
int col = getColor(e);
RgbaColor c = RgbaColor::From(DRW::dxfColors[col][0],
DRW::dxfColors[col][1],
DRW::dxfColors[col][2]);
// Line width.
DRW_LW_Conv::lineWidth lw = getLineWidth(e);
double width = DRW_LW_Conv::lineWidth2dxfInt(e->lWeight) / 100.0;
if(width < 0.0) width = 1.0;
// Line stipple.
//! @todo Probably, we can load default autocad patterns and match it with ours.
std::string lineType = getLineType(e);
StipplePattern stipple = StipplePattern::CONTINUOUS;
for(uint32_t i = 0; i <= (uint32_t)StipplePattern::LAST; i++) {
StipplePattern st = (StipplePattern)i;
if(lineType == DxfFileWriter::lineTypeName(st)) {
stipple = st;
break;
}
}
// Text properties.
DRW_Text::HAlign alignH = DRW_Text::HLeft;
DRW_Text::VAlign alignV = DRW_Text::VBaseLine;
double textAngle = 0.0;
double textHeight = Style::DefaultTextHeight();
if(e->eType == DRW::TEXT || e->eType == DRW::MTEXT) {
const DRW_Text *text = static_cast<const DRW_Text *>(e);
alignH = text->alignH;
alignV = text->alignV;
textHeight = text->height;
textAngle = text->angle;
// I have no idea why, but works
if(alignH == DRW_Text::HMiddle) {
alignV = DRW_Text::VMiddle;
}
}
// Unique identifier based on style properties.
std::string id = "@dxf";
if(lw != DRW_LW_Conv::widthDefault)
id += ssprintf("-w%.4g", width);
if(lineType != "CONTINUOUS")
id += ssprintf("-%s", lineType.c_str());
if(c.red != 0 || c.green != 0 || c.blue != 0)
id += ssprintf("-#%02x%02x%02x", c.red, c.green, c.blue);
if(textHeight != Style::DefaultTextHeight())
id += ssprintf("-h%.4g", textHeight);
if(textAngle != 0.0)
id += ssprintf("-a%.5g", textAngle);
if(alignH != DRW_Text::HLeft)
id += ssprintf("-oh%d", alignH);
if(alignV != DRW_Text::VBaseLine)
id += ssprintf("-ov%d", alignV);
auto si = styles.find(id);
if(si != styles.end()) {
return si->second;
}
hStyle hs = { Style::CreateCustomStyle(/*rememberForUndo=*/false) };
Style *s = Style::Get(hs);
if(lw != DRW_LW_Conv::widthDefault) {
s->widthAs = Style::UnitsAs::MM;
s->width = width;
s->stippleScale = 1.0 + width * 2.0;
}
s->name = id;
s->stippleType = stipple;
if(c.red != 0 || c.green != 0 || c.blue != 0) s->color = c;
s->textHeightAs = Style::UnitsAs::MM;
s->textHeight = textHeight;
s->textAngle = textAngle;
s->textOrigin = dxfAlignToOrigin(alignH, alignV);
styles.emplace(id, hs);
return hs;
}
void configureRequest(hRequest hr, hStyle hs) {
Request *r = SK.GetRequest(hr);
r->construction = asConstruction;
r->style = hs;
}
struct VectorHash {
size_t operator()(const Vector &v) const {
static const size_t size = std::numeric_limits<size_t>::max() / 2 - 1;
static const double eps = (4.0 * LENGTH_EPS);
double x = fabs(v.x) / eps;
double y = fabs(v.y) / eps;
size_t xs = size_t(fmod(x, double(size)));
size_t ys = size_t(fmod(y, double(size)));
return ys * size + xs;
}
};
struct VectorPred {
bool operator()(Vector a, Vector b) const {
return a.Equals(b, LENGTH_EPS);
}
};
std::unordered_map<Vector, hEntity, VectorHash, VectorPred> points;
void processPoint(hEntity he, bool constrain = true) {
Entity *e = SK.GetEntity(he);
Vector pos = e->PointGetNum();
hEntity p = findPoint(pos);
if(p == he) return;
if(p != Entity::NO_ENTITY) {
if(constrain) {
Constraint::ConstrainCoincident(he, p);
}
// We don't add point because we already
// have point in this position
return;
}
points.emplace(pos, he);
}
hEntity findPoint(const Vector &p) {
auto it = points.find(p);
if(it == points.end()) return Entity::NO_ENTITY;
return it->second;
}
hEntity createOrGetPoint(const Vector &p) {
hEntity he = findPoint(p);
if(he != Entity::NO_ENTITY) return he;
hRequest hr = SS.GW.AddRequest(Request::Type::DATUM_POINT, /*rememberForUndo=*/false);
he = hr.entity(0);
SK.GetEntity(he)->PointForceTo(p);
points.emplace(p, he);
return he;
}
hEntity createLine(Vector p0, Vector p1, hStyle style, bool constrainHV = false) {
if(p0.Equals(p1)) return Entity::NO_ENTITY;
hRequest hr = SS.GW.AddRequest(Request::Type::LINE_SEGMENT, /*rememberForUndo=*/false);
SK.GetEntity(hr.entity(1))->PointForceTo(p0);
SK.GetEntity(hr.entity(2))->PointForceTo(p1);
processPoint(hr.entity(1));
processPoint(hr.entity(2));
if(constrainHV && SS.GW.LockedInWorkplane()) {
bool hasConstraint = false;
Constraint::Type cType;
if(fabs(p0.x - p1.x) < LENGTH_EPS) {
hasConstraint = true;
cType = Constraint::Type::VERTICAL;
} else if(fabs(p0.y - p1.y) < LENGTH_EPS) {
hasConstraint = true;
cType = Constraint::Type::HORIZONTAL;
}
if(hasConstraint) {
Constraint::Constrain(
cType,
Entity::NO_ENTITY,
Entity::NO_ENTITY,
hr.entity(0)
);
}
}
configureRequest(hr, style);
return hr.entity(0);
}
hEntity createCircle(const Vector &c, double r, hStyle style) {
hRequest hr = SS.GW.AddRequest(Request::Type::CIRCLE, /*rememberForUndo=*/false);
SK.GetEntity(hr.entity(1))->PointForceTo(c);
processPoint(hr.entity(1));
SK.GetEntity(hr.entity(64))->DistanceForceTo(r);
configureRequest(hr, style);
return hr.entity(0);
}
void addLayer(const DRW_Layer &data) override {
layers.emplace(data.name, data);
}
void addBlock(const DRW_Block &data) override {
readBlock = &blocks[data.name];
readBlock->data = data;
}
void endBlock() override {
readBlock = NULL;
}
void addPoint(const DRW_Point &data) override {
if(data.space != DRW::ModelSpace) return;
if(addPendingBlockEntity<DRW_Point>(data)) return;
hRequest hr = SS.GW.AddRequest(Request::Type::DATUM_POINT, /*rememberForUndo=*/false);
SK.GetEntity(hr.entity(0))->PointForceTo(toVector(data.basePoint));
processPoint(hr.entity(0));
}
void addLine(const DRW_Line &data) override {
if(data.space != DRW::ModelSpace) return;
if(addPendingBlockEntity<DRW_Line>(data)) return;
createLine(toVector(data.basePoint), toVector(data.secPoint), styleFor(&data),
/*constrainHV=*/true);
}
void addArc(const DRW_Arc &data) override {
if(data.space != DRW::ModelSpace) return;
if(addPendingBlockEntity<DRW_Arc>(data)) return;
hRequest hr = SS.GW.AddRequest(Request::Type::ARC_OF_CIRCLE, /*rememberForUndo=*/false);
double r = data.radious;
double sa = data.staangle;
double ea = data.endangle;
Vector c = Vector::From(data.basePoint.x, data.basePoint.y, data.basePoint.z);
Vector rvs = Vector::From(r * cos(sa), r * sin(sa), data.basePoint.z).Plus(c);
Vector rve = Vector::From(r * cos(ea), r * sin(ea), data.basePoint.z).Plus(c);
if(data.extPoint.z == -1.0) {
c.x = -c.x;
rvs.x = - rvs.x;
rve.x = - rve.x;
std::swap(rvs, rve);
}
blockTransformArc(&c, &rvs, &rve);
SK.GetEntity(hr.entity(1))->PointForceTo(c);
SK.GetEntity(hr.entity(2))->PointForceTo(rvs);
SK.GetEntity(hr.entity(3))->PointForceTo(rve);
processPoint(hr.entity(1));
processPoint(hr.entity(2));
processPoint(hr.entity(3));
configureRequest(hr, styleFor(&data));
}
void addCircle(const DRW_Circle &data) override {
if(data.space != DRW::ModelSpace) return;
if(addPendingBlockEntity<DRW_Circle>(data)) return;
createCircle(toVector(data.basePoint), data.radious, styleFor(&data));
}
void addLWPolyline(const DRW_LWPolyline &data) override {
if(data.space != DRW::ModelSpace) return;
if(addPendingBlockEntity<DRW_LWPolyline>(data)) return;
size_t vNum = data.vertlist.size();
// Check for closed polyline.
if((data.flags & 1) != 1) vNum--;
// Correct coordinate system for the case where z=-1, as described in
// http://paulbourke.net/dataformats/dxf/dxf10.html.
bool needSwapX = data.extPoint.z == -1.0;
for(size_t i = 0; i < vNum; i++) {
DRW_Vertex2D c0 = *data.vertlist[i];
DRW_Vertex2D c1 = *data.vertlist[(i + 1) % data.vertlist.size()];
if(needSwapX) {
c0.x = -c0.x;
c1.x = -c1.x;
c0.bulge = -c0.bulge;
}
Vector p0 = Vector::From(c0.x, c0.y, 0.0);
Vector p1 = Vector::From(c1.x, c1.y, 0.0);
hStyle hs = styleFor(&data);
if(EXACT(data.vertlist[i]->bulge == 0.0)) {
createLine(blockTransform(p0), blockTransform(p1), hs, /*constrainHV=*/true);
} else {
hRequest hr = createBulge(p0, p1, c0.bulge);
configureRequest(hr, hs);
}
}
}
void addPolyline(const DRW_Polyline &data) override {
if(data.space != DRW::ModelSpace) return;
if(addPendingBlockEntity<DRW_Polyline>(data)) return;
size_t vNum = data.vertlist.size();
// Check for closed polyline.
if((data.flags & 1) != 1) vNum--;
// Correct coordinate system for the case where z=-1, as described in
// http://paulbourke.net/dataformats/dxf/dxf10.html.
bool needSwapX = (data.extPoint.z == -1.0);
for(size_t i = 0; i < vNum; i++) {
DRW_Coord c0 = data.vertlist[i]->basePoint;
DRW_Coord c1 = data.vertlist[(i + 1) % data.vertlist.size()]->basePoint;
double bulge = data.vertlist[i]->bulge;
if(needSwapX) {
c0.x = -c0.x;
c1.x = -c1.x;
bulge = -bulge;
}
Vector p0 = Vector::From(c0.x, c0.y, c0.z);
Vector p1 = Vector::From(c1.x, c1.y, c1.z);
hStyle hs = styleFor(&data);
if(EXACT(bulge == 0.0)) {
createLine(blockTransform(p0), blockTransform(p1), hs, /*constrainHV=*/true);
} else {
hRequest hr = createBulge(p0, p1, bulge);
configureRequest(hr, hs);
}
}
}
void addSpline(const DRW_Spline *data) override {
if(data->space != DRW::ModelSpace) return;
if(data->degree != 3) return;
if(addPendingBlockEntity<DRW_Spline>(*data)) return;
hRequest hr = SS.GW.AddRequest(Request::Type::CUBIC, /*rememberForUndo=*/false);
for(int i = 0; i < 4; i++) {
SK.GetEntity(hr.entity(i + 1))->PointForceTo(toVector(*data->controllist[i]));
processPoint(hr.entity(i + 1));
}
configureRequest(hr, styleFor(data));
}
void addInsert(const DRW_Insert &data) override {
if(data.space != DRW::ModelSpace) return;
if(addPendingBlockEntity<DRW_Insert>(data)) return;
auto bi = blocks.find(data.name);
ssassert(bi != blocks.end(), "Inserted block does not exist");
Block *block = &bi->second;
// Push transform.
Vector x = blockX;
Vector y = blockY;
Vector t = blockT;
const DRW_Insert *oldInsert = insertInsert;
insertInsert = &data;
if(data.extPoint.z == -1.0) invertXTransform();
multBlockTransform(data.basePoint.x, data.basePoint.y, data.xscale, data.yscale,
data.angle);
for(auto &e : block->entities) {
addEntity(&*e);
}
insertInsert = oldInsert;
// Pop transform.
blockX = x;
blockY = y;
blockT = t;
}
void addMText(const DRW_MText &data) override {
if(data.space != DRW::ModelSpace) return;
if(addPendingBlockEntity<DRW_MText>(data)) return;
DRW_MText text = data;
text.secPoint = text.basePoint;
addText(text);
}
void addText(const DRW_Text &data) override {
if(data.space != DRW::ModelSpace) return;
if(addPendingBlockEntity<DRW_Text>(data)) return;
Constraint c = {};
c.group = SS.GW.activeGroup;
c.workplane = SS.GW.ActiveWorkplane();
c.type = Constraint::Type::COMMENT;
if(data.alignH == DRW_Text::HLeft && data.alignV == DRW_Text::VBaseLine) {
c.disp.offset = toVector(data.basePoint);
} else {
c.disp.offset = toVector(data.secPoint);
}
c.comment = data.text;
c.disp.style = styleFor(&data);
Constraint::AddConstraint(&c, /*rememberForUndo=*/false);
}
void addDimAlign(const DRW_DimAligned *data) override {
if(data->space != DRW::ModelSpace) return;
if(addPendingBlockEntity<DRW_DimAligned>(*data)) return;
Vector p0 = toVector(data->getDef1Point());
Vector p1 = toVector(data->getDef2Point());
Vector p2 = toVector(data->getTextPoint());
hConstraint hc = Constraint::Constrain(
Constraint::Type::PT_PT_DISTANCE,
createOrGetPoint(p0),
createOrGetPoint(p1),
Entity::NO_ENTITY
);
Constraint *c = SK.GetConstraint(hc);
if(data->hasActualMeasurement()) {
c->valA = data->getActualMeasurement();
} else {
c->ModifyToSatisfy();
}
c->disp.offset = p2.Minus(p0.Plus(p1).ScaledBy(0.5));
}
void addDimLinear(const DRW_DimLinear *data) override {
if(data->space != DRW::ModelSpace) return;
if(addPendingBlockEntity<DRW_DimLinear>(*data)) return;
Vector p0 = toVector(data->getDef1Point(), /*transform=*/false);
Vector p1 = toVector(data->getDef2Point(), /*transform=*/false);
Vector p2 = toVector(data->getTextPoint(), /*transform=*/false);
double angle = data->getAngle() * PI / 180.0;
Vector dir = Vector::From(cos(angle), sin(angle), 0.0);
Vector p3 = p1.Minus(p1.ClosestPointOnLine(p2, dir)).Plus(p1);
if(p1.Minus(p3).Magnitude() < LENGTH_EPS) {
p3 = p0.Minus(p0.ClosestPointOnLine(p2, dir)).Plus(p1);
}
Vector p4 = p0.ClosestPointOnLine(p1, p3.Minus(p1)).Plus(p0).ScaledBy(0.5);
p0 = blockTransform(p0);
p1 = blockTransform(p1);
p2 = blockTransform(p2);
p3 = blockTransform(p3);
p4 = blockTransform(p4);
hConstraint hc = Constraint::Constrain(
Constraint::Type::PT_LINE_DISTANCE,
createOrGetPoint(p0),
Entity::NO_ENTITY,
createLine(p1, p3, invisibleStyle())
);
Constraint *c = SK.GetConstraint(hc);
if(data->hasActualMeasurement()) {
c->valA = data->getActualMeasurement();
} else {
c->ModifyToSatisfy();
}
c->disp.offset = p2.Minus(p4);
}
void addDimAngular(const DRW_DimAngular *data) override {
if(data->space != DRW::ModelSpace) return;
if(addPendingBlockEntity<DRW_DimAngular>(*data)) return;
Vector l0p0 = toVector(data->getFirstLine1());
Vector l0p1 = toVector(data->getFirstLine2());
Vector l1p0 = toVector(data->getSecondLine1());
Vector l1p1 = toVector(data->getSecondLine2());
hConstraint hc = Constraint::Constrain(
Constraint::Type::ANGLE,
Entity::NO_ENTITY,
Entity::NO_ENTITY,
createLine(l0p0, l0p1, invisibleStyle()),
createLine(l1p1, l1p0, invisibleStyle()),
/*other=*/false,
/*other2=*/false
);
Constraint *c = SK.GetConstraint(hc);
c->ModifyToSatisfy();
if(data->hasActualMeasurement()) {
double actual = data->getActualMeasurement() / PI * 180.0;
if(fabs(180.0 - actual - c->valA) < fabs(actual - c->valA)) {
c->other = true;
}
c->valA = actual;
}
bool skew = false;
Vector pi = Vector::AtIntersectionOfLines(l0p0, l0p1, l1p0, l1p1, &skew);
if(!skew) {
c->disp.offset = toVector(data->getTextPoint()).Minus(pi);
}
}
hConstraint createDiametric(Vector cp, double r, Vector tp, double actual,
bool asRadius = false) {
hEntity he = createCircle(cp, r, invisibleStyle());
hConstraint hc = Constraint::Constrain(
Constraint::Type::DIAMETER,
Entity::NO_ENTITY,
Entity::NO_ENTITY,
he
);
Constraint *c = SK.GetConstraint(hc);
if(actual > 0.0) {
c->valA = asRadius ? actual * 2.0 : actual;
} else {
c->ModifyToSatisfy();
}
c->disp.offset = tp.Minus(cp);
if(asRadius) c->other = true;
return hc;
}
void addDimRadial(const DRW_DimRadial *data) override {
if(data->space != DRW::ModelSpace) return;
if(addPendingBlockEntity<DRW_DimRadial>(*data)) return;
Vector cp = toVector(data->getCenterPoint());
Vector dp = toVector(data->getDiameterPoint());
Vector tp = toVector(data->getTextPoint());
double actual = -1.0;
if(data->hasActualMeasurement()) {
actual = data->getActualMeasurement();
}
createDiametric(cp, cp.Minus(dp).Magnitude(), tp, actual, /*asRadius=*/true);
}
void addDimDiametric(const DRW_DimDiametric *data) override {
if(data->space != DRW::ModelSpace) return;
if(addPendingBlockEntity<DRW_DimRadial>(*data)) return;
Vector dp1 = toVector(data->getDiameter1Point());
Vector dp2 = toVector(data->getDiameter2Point());
Vector cp = dp1.Plus(dp2).ScaledBy(0.5);
Vector tp = toVector(data->getTextPoint());
double actual = -1.0;
if(data->hasActualMeasurement()) {
actual = data->getActualMeasurement();
}
createDiametric(cp, cp.Minus(dp1).Magnitude(), tp, actual, /*asRadius=*/false);
}
void addDimAngular3P(const DRW_DimAngular3p *data) override {
if(data->space != DRW::ModelSpace) return;
if(addPendingBlockEntity<DRW_DimAngular3p>(*data)) return;
DRW_DimAngular dim = *static_cast<const DRW_Dimension *>(data);
dim.setFirstLine1(data->getVertexPoint());
dim.setFirstLine2(data->getFirstLine());
dim.setSecondLine1(data->getVertexPoint());
dim.setSecondLine2(data->getSecondLine());
addDimAngular(&dim);
}
};
class DxfCheck3D : public DRW_Interface {
public:
bool is3d;
void addEntity(DRW_Entity *e) {
switch(e->eType) {
case DRW::POINT:
addPoint(*static_cast<DRW_Point *>(e));
break;
case DRW::LINE:
addLine(*static_cast<DRW_Line *>(e));
break;
case DRW::ARC:
addArc(*static_cast<DRW_Arc *>(e));
break;
case DRW::CIRCLE:
addCircle(*static_cast<DRW_Circle *>(e));
break;
case DRW::POLYLINE:
addPolyline(*static_cast<DRW_Polyline *>(e));
break;
case DRW::LWPOLYLINE:
addLWPolyline(*static_cast<DRW_LWPolyline *>(e));
break;
case DRW::SPLINE:
addSpline(static_cast<DRW_Spline *>(e));
break;
case DRW::INSERT:
addInsert(*static_cast<DRW_Insert *>(e));
break;
case DRW::TEXT:
addText(*static_cast<DRW_Text *>(e));
break;
case DRW::MTEXT:
addMText(*static_cast<DRW_MText *>(e));
break;
case DRW::DIMALIGNED:
addDimAlign(static_cast<DRW_DimAligned *>(e));
break;
case DRW::DIMLINEAR:
addDimLinear(static_cast<DRW_DimLinear *>(e));
break;
case DRW::DIMRADIAL:
addDimRadial(static_cast<DRW_DimRadial *>(e));
break;
case DRW::DIMDIAMETRIC:
addDimDiametric(static_cast<DRW_DimDiametric *>(e));
break;
case DRW::DIMANGULAR:
addDimAngular(static_cast<DRW_DimAngular *>(e));
break;
default:
break;
}
}
void addPoint(const DRW_Point &data) override {
if(data.space != DRW::ModelSpace) return;
checkCoord(data.basePoint);
}
void addLine(const DRW_Line &data) override {
if(data.space != DRW::ModelSpace) return;
checkCoord(data.basePoint);
checkCoord(data.secPoint);
}
void addArc(const DRW_Arc &data) override {
if(data.space != DRW::ModelSpace) return;
checkCoord(data.basePoint);
}
void addCircle(const DRW_Circle &data) override {
if(data.space != DRW::ModelSpace) return;
checkCoord(data.basePoint);
}
void addPolyline(const DRW_Polyline &data) override {
if(data.space != DRW::ModelSpace) return;
for(size_t i = 0; i < data.vertlist.size(); i++) {
checkCoord(data.vertlist[i]->basePoint);
}
}
void addSpline(const DRW_Spline *data) override {
if(data->space != DRW::ModelSpace) return;
if(data->degree != 3) return;
for(int i = 0; i < 4; i++) {
checkCoord(*data->controllist[i]);
}
}
void addInsert(const DRW_Insert &data) override {
if(data.space != DRW::ModelSpace) return;
checkCoord(data.basePoint);
}
void addMText(const DRW_MText &data) override {
if(data.space != DRW::ModelSpace) return;
DRW_MText text = data;
text.secPoint = text.basePoint;
addText(text);
}
void addText(const DRW_Text &data) override {
if(data.space != DRW::ModelSpace) return;
checkCoord(data.basePoint);
checkCoord(data.secPoint);
}
void addDimAlign(const DRW_DimAligned *data) override {
if(data->space != DRW::ModelSpace) return;
checkCoord(data->getDef1Point());
checkCoord(data->getDef2Point());
checkCoord(data->getTextPoint());
}
void addDimLinear(const DRW_DimLinear *data) override {
if(data->space != DRW::ModelSpace) return;
checkCoord(data->getDef1Point());
checkCoord(data->getDef2Point());
checkCoord(data->getTextPoint());
}
void addDimAngular(const DRW_DimAngular *data) override {
if(data->space != DRW::ModelSpace) return;
checkCoord(data->getFirstLine1());
checkCoord(data->getFirstLine2());
checkCoord(data->getSecondLine1());
checkCoord(data->getSecondLine2());
checkCoord(data->getTextPoint());
}
void addDimRadial(const DRW_DimRadial *data) override {
if(data->space != DRW::ModelSpace) return;
checkCoord(data->getCenterPoint());
checkCoord(data->getDiameterPoint());
checkCoord(data->getTextPoint());
}
void addDimDiametric(const DRW_DimDiametric *data) override {
if(data->space != DRW::ModelSpace) return;
checkCoord(data->getDiameter1Point());
checkCoord(data->getDiameter2Point());
checkCoord(data->getTextPoint());
}
void addDimAngular3P(const DRW_DimAngular3p *data) override {
if(data->space != DRW::ModelSpace) return;
DRW_DimAngular dim = *static_cast<const DRW_Dimension *>(data);
dim.setFirstLine1(data->getVertexPoint());
dim.setFirstLine2(data->getFirstLine());
dim.setSecondLine1(data->getVertexPoint());
dim.setSecondLine2(data->getSecondLine());
addDimAngular(&dim);
}
void checkCoord(const DRW_Coord &coord) {
if(fabs(coord.z) > LENGTH_EPS) {
is3d = true;
}
}
};
static void
ImportDwgDxf(const Platform::Path &filename,
const std::function<bool(const std::string &data, DRW_Interface *intf)> &read) {
std::string fileType = ToUpper(filename.Extension());
std::string data;
if(!ReadFile(filename, &data)) {
Error("Couldn't read from '%s'", filename.raw.c_str());
return;
}
bool asConstruction = true;
if(SS.GW.LockedInWorkplane()) {
DxfCheck3D checker = {};
read(data, &checker);
if(checker.is3d) {
Message("This %s file contains entities with non-zero Z coordinate; "
"the entire file will be imported as construction entities in 3d.",
fileType.c_str());
SS.GW.SetWorkplaneFreeIn3d();
SS.GW.EnsureValidActives();
} else {
asConstruction = false;
}
}
SS.UndoRemember();
DxfImport importer = {};
importer.asConstruction = asConstruction;
importer.clearBlockTransform();
if(!read(data, &importer)) {
Error("Corrupted %s file.", fileType.c_str());
return;
}
if(importer.unknownEntities > 0) {
Message("%u %s entities of unknown type were ignored.",
importer.unknownEntities, fileType.c_str());
}
}
void ImportDxf(const Platform::Path &filename) {
ImportDwgDxf(filename, [](const std::string &data, DRW_Interface *intf) {
std::stringstream stream(data);
return dxfRW().read(stream, intf, /*ext=*/false);
});
}
void ImportDwg(const Platform::Path &filename) {
ImportDwgDxf(filename, [](const std::string &data, DRW_Interface *intf) {
std::stringstream stream(data);
return dwgR().read(stream, intf, /*ext=*/false);
});
}
}
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