Vector blockX;

Vector blockY;

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);

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));

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, 0.0);

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, 0.0);

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;

};

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 setStyle(hRequest hr, hStyle hs) {

Request *r = SK.GetRequest(hr);

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.v == he.v) return;

if(p.v != Entity::NO_ENTITY.v) {

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.v != Entity::NO_ENTITY.v) 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, uint32_t 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) {

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)

);

}

}

if(style != 0) {

Request *r = SK.GetRequest(hr);

r->style = hStyle{ style };

}

return hr.entity(0);

}

hEntity createCircle(const Vector &c, double r, uint32_t 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);

if(style != 0) {

Request *r = SK.GetRequest(hr);

r->style = hStyle{ 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).v, /*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, 0.0);

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));

setStyle(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).v);

}

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.v, /*constrainHV=*/true);

} else {

hRequest hr = createBulge(p0, p1, c0.bulge);

setStyle(hr, hs);

}

}

}

void addPolyline(const DRW_Polyline &data) override {

if(data.space != DRW::ModelSpace) return;

if(addPendingBlockEntity<DRW_Polyline>(data)) return;

int 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(int 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, 0.0);

Vector p1 = Vector::From(c1.x, c1.y, 0.0);

hStyle hs = styleFor(&data);

if(EXACT(bulge == 0.0)) {

createLine(blockTransform(p0), blockTransform(p1), hs.v, /*constrainHV=*/true);

} else {

hRequest hr = createBulge(p0, p1, bulge);

setStyle(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));

}

setStyle(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().v)

);

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().v),

createLine(l1p1, l1p0, invisibleStyle().v),

/*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().v);

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);

}

DxfReadInterface interface;

interface.clearBlockTransform();

std::string data;

if(!ReadFile(filename, &data)) {

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

return;

}

SS.UndoRemember();

std::stringstream stream(data);

if(!dxfRW().read(stream, &interface, /*ext=*/false)) {

Error("Corrupted DXF file.");

}

if(interface.unknownEntities > 0) {

Message(ssprintf("%u DXF entities of unknown type were ignored.",

interface.unknownEntities).c_str());

}

DxfReadInterface interface;

interface.clearBlockTransform();

std::string data;

if(!ReadFile(filename, &data)) {

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

return;

}

SS.UndoRemember();

std::stringstream stream(data);

if(!dwgR().read(stream, &interface, /*ext=*/false)) {

Error("Corrupted DWG file.");

}

if(interface.unknownEntities > 0) {

Message(ssprintf("%u DWG entities of unknown type were ignored.",

interface.unknownEntities).c_str());

}