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109 lines
2.4 KiB
C++
109 lines
2.4 KiB
C++
#include "DXF.h"
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// private constructor -- may be created only by DXFEntities
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DXFBlockRef::DXFBlockRef(DXFEntities *e) : DXFEntity(e, "INSERT")
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{
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insertPoint.x = insertPoint.y = 0;
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angle = 0;
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scale = 1;
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name = "unnamed";
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}
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// write to stream
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bool DXFBlockRef::Write(Stream &s)
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{
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// call base class write
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if(!DXFEntity::Write(s))
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return false;
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// output line points
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s << "100\nAcDbBlockReference\n";
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s << "2\n" << ToCharset(CHARSET_WIN1252, name) << "\n";
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s << "10\n" << insertPoint.x << "\n20\n" << insertPoint.y << "\n30\n" << 0.0 << "\n";
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s << "41\n" << scale << "\n42\n" << scale << "\n43\n" << scale << "\n";
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s << "50\n" << angle * 180.0 / M_PI << "\n";
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return true;
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}
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// scale distance depending on scale option in DXF
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double DXFBlockRef::S(double d) const
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{
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if(GetDXF().GetScaleInsertions())
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return DXFEntity::S(d);
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return d;
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}
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// setters
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DXFBlockRef &DXFBlockRef::SetName(String const &n)
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{
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name = n;
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return *this;
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}
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DXFBlockRef &DXFBlockRef::SetInsertPoint(Pointf const &p)
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{
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insertPoint = T(p);
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return *this;
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}
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DXFBlockRef &DXFBlockRef::SetScale(double s)
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{
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scale = S(s);
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return *this;
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}
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DXFBlockRef &DXFBlockRef::SetAngle(double a)
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{
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angle = R(a);
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return *this;
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}
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DXFBlockRef &DXFBlockRef::Set(Pointf const &p, double s, double a)
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{
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insertPoint = T(p);
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scale = S(s);
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angle = R(a);
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return *this;
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}
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DXFBlockRef &DXFBlockRef::Set(String const &n, Pointf const &p, double s, double a)
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{
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name = n;
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insertPoint = T(p);
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scale = S(s);
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angle = R(a);
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return *this;
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}
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// gets bounding box of element
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Rectf DXFBlockRef::GetBoundingBox(void) const
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{
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Rectf res;
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// get dxf object
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DXF const &dxf = GetDXF();
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// get block data by name; if none, returns
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if(!dxf.HasBlock(name))
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return Rectf(1e99, -1e99, -1e99, 1e99);
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DXFBlock const &blk = dxf.GetBlock(name);
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// get the bounding box of included entities
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Rectf bbe = blk.entities.GetBoundingBox();
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// now we need to apply transformation to bbox points
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TransMatrix M;
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M.Translate(insertPoint).Rotate(angle).Scale(scale);
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Pointf bl = M(bbe.BottomLeft());
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Pointf tl = M(bbe.TopLeft());
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Pointf br = M(bbe.BottomRight());
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Pointf tr = M(bbe.TopRight());
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// and now get the minimum and maximum coordinate values
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res.left = min(min(bl.x, tl.x), min(br.x, tr.x));
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res.right = max(max(bl.x, tl.x), max(br.x, tr.x));
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res.bottom = min(min(bl.y, tl.y), min(br.y, tr.y));
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res.top = max(max(bl.y, tl.y), max(br.y, tr.y));
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return res;
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}
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