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dxfvec.cxx
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19 
20 
21 #include <math.h>
22 #include "dxfvec.hxx"
23 #include <tools/gen.hxx>
24 
25 
26 //---------------------------- DXFVector ---------------------------------------
27 
28 
29 double DXFVector::Abs() const
30 {
31  return sqrt(SProd(*this));
32 }
33 
34 
36 {
37  double flen;
38 
39  flen=Abs();
40  if (flen!=0) return (*this)*(1.0/flen);
41  else return DXFVector(1.0,0.0,0.0);
42 }
43 
44 
45 //---------------------------- DXFTransform ------------------------------------
46 
47 
49  aMX(1.0, 0.0, 0.0),
50  aMY(0.0, 1.0, 0.0),
51  aMZ(0.0, 0.0, 1.0),
52  aMP(0.0, 0.0, 0.0)
53 {
54 }
55 
56 
57 DXFTransform::DXFTransform(double fScaleX, double fScaleY, double fScaleZ,
58  const DXFVector & rShift) :
59  aMX(fScaleX, 0.0, 0.0),
60  aMY(0.0, fScaleY, 0.0),
61  aMZ(0.0, 0.0, fScaleZ),
62  aMP(rShift)
63 {
64 }
65 
66 
67 DXFTransform::DXFTransform(double fScaleX, double fScaleY, double fScaleZ,
68  double fRotAngle,
69  const DXFVector & rShift) :
70  aMX(0.0, 0.0, 0.0),
71  aMY(0.0, 0.0, 0.0),
72  aMZ(0.0, 0.0, fScaleZ),
73  aMP(rShift)
74 {
75  aMX.fx=cos(3.14159265359/180.0*fRotAngle);
76  aMX.fy=sin(3.14159265359/180.0*fRotAngle);
77  aMY.fx=-aMX.fy;
78  aMY.fy=aMX.fx;
79  aMX*=fScaleX;
80  aMY*=fScaleY;
81 }
82 
83 
85  aMP(0.0, 0.0, 0.0)
86 {
87  // 'Arbitrary Axis Algorithm' (cf. DXF documentation by Autodesk)
88  if ( fabs(rExtrusion.fx) < 1.0/64.0 && fabs(rExtrusion.fy) < 1.0/64.0) {
89  aMX = DXFVector(0.0, 1.0, 0.0) * rExtrusion;
90  }
91  else {
92  aMX = DXFVector(0.0, 0.0, 1.0) * rExtrusion;
93  }
94  aMX=aMX.Unit();
95  aMY=(rExtrusion*aMX).Unit();
96  aMZ=rExtrusion.Unit();
97 }
98 
99 
100 DXFTransform::DXFTransform(const DXFVector & rViewDir, const DXFVector & rViewTarget)
101 {
102  DXFVector aV;
103 
104  aV=rViewDir.Unit();
105  aMX.fz=aV.fx;
106  aMY.fz=aV.fy;
107  aMZ.fz=aV.fz;
108 
109  aMZ.fx=0;
110  if (aV.fx==0) aMY.fx=0; else aMY.fx=sqrt(1/(1+aV.fy*aV.fy/(aV.fx*aV.fx)));
111  aMX.fx=sqrt(1-aMY.fx*aMY.fx);
112  if (aV.fx*aV.fy*aMY.fx>0) aMX.fx=-aMX.fx;
113 
114  aV=aV*DXFVector(aMX.fx,aMY.fx,aMZ.fx);
115  aMX.fy=aV.fx;
116  aMY.fy=aV.fy;
117  aMZ.fy=aV.fz;
118 
119  if (aMZ.fy<0) {
120  aMX.fy=-aMX.fy;
121  aMY.fy=-aMY.fy;
122  aMZ.fy=-aMZ.fy;
123  aMX.fx=-aMX.fx;
124  aMY.fx=-aMY.fx;
125  }
126 
127  aV=DXFVector(0,0,0)-rViewTarget;
128  aMP.fx = aV.fx * aMX.fx + aV.fy * aMY.fx + aV.fz * aMZ.fx;
129  aMP.fy = aV.fx * aMX.fy + aV.fy * aMY.fy + aV.fz * aMZ.fy;
130  aMP.fz = aV.fx * aMX.fz + aV.fy * aMY.fz + aV.fz * aMZ.fz;
131 }
132 
133 
135 {
136  rT2.TransDir(rT1.aMX,aMX);
137  rT2.TransDir(rT1.aMY,aMY);
138  rT2.TransDir(rT1.aMZ,aMZ);
139  rT2.Transform(rT1.aMP,aMP);
140 }
141 
142 
143 void DXFTransform::Transform(const DXFVector & rSrc, DXFVector & rTgt) const
144 {
145  rTgt.fx = rSrc.fx * aMX.fx + rSrc.fy * aMY.fx + rSrc.fz * aMZ.fx + aMP.fx;
146  rTgt.fy = rSrc.fx * aMX.fy + rSrc.fy * aMY.fy + rSrc.fz * aMZ.fy + aMP.fy;
147  rTgt.fz = rSrc.fx * aMX.fz + rSrc.fy * aMY.fz + rSrc.fz * aMZ.fz + aMP.fz;
148 }
149 
150 
151 void DXFTransform::Transform(const DXFVector & rSrc, Point & rTgt) const
152 {
153  rTgt.setX(static_cast<tools::Long>( rSrc.fx * aMX.fx + rSrc.fy * aMY.fx + rSrc.fz * aMZ.fx + aMP.fx + 0.5 ) );
154  rTgt.setY(static_cast<tools::Long>( rSrc.fx * aMX.fy + rSrc.fy * aMY.fy + rSrc.fz * aMZ.fy + aMP.fy + 0.5 ) );
155 }
156 
157 
158 void DXFTransform::TransDir(const DXFVector & rSrc, DXFVector & rTgt) const
159 {
160  rTgt.fx = rSrc.fx * aMX.fx + rSrc.fy * aMY.fx + rSrc.fz * aMZ.fx;
161  rTgt.fy = rSrc.fx * aMX.fy + rSrc.fy * aMY.fy + rSrc.fz * aMZ.fy;
162  rTgt.fz = rSrc.fx * aMX.fz + rSrc.fy * aMY.fz + rSrc.fz * aMZ.fz;
163 }
164 
165 
166 bool DXFTransform::TransCircleToEllipse(double fRadius, double & rEx, double & rEy) const
167 {
168  double fMXAbs=aMX.Abs();
169  double fMYAbs=aMY.Abs();
170  double fNearNull=(fMXAbs+fMYAbs)*0.001;
171 
172  if (fabs(aMX.fy)<=fNearNull && fabs(aMX.fz)<=fNearNull &&
173  fabs(aMY.fx)<=fNearNull && fabs(aMY.fz)<=fNearNull)
174  {
175  rEx=fabs(aMX.fx*fRadius);
176  rEy=fabs(aMY.fy*fRadius);
177  return true;
178  }
179  else if (fabs(aMX.fx)<=fNearNull && fabs(aMX.fz)<=fNearNull &&
180  fabs(aMY.fy)<=fNearNull && fabs(aMY.fz)<=fNearNull)
181  {
182  rEx=fabs(aMY.fx*fRadius);
183  rEy=fabs(aMX.fy*fRadius);
184  return true;
185  }
186  else if (fabs(fMXAbs-fMYAbs)<=fNearNull &&
187  fabs(aMX.fz)<=fNearNull && fabs(aMY.fz)<=fNearNull)
188  {
189  rEx=rEy=fabs(((fMXAbs+fMYAbs)/2)*fRadius);
190  return true;
191  }
192  else return false;
193 }
194 
195 LineInfo DXFTransform::Transform(const DXFLineInfo& aDXFLineInfo) const
196 {
197  double fex,fey,scale;
198 
199  fex=sqrt(aMX.fx*aMX.fx + aMX.fy*aMX.fy);
200  fey=sqrt(aMY.fx*aMY.fx + aMY.fy*aMY.fy);
201  scale = (fex+fey)/2.0;
202 
203  LineInfo aLineInfo;
204 
205  aLineInfo.SetStyle( aDXFLineInfo.eStyle );
206  aLineInfo.SetWidth( 0 );
207  aLineInfo.SetDashCount( static_cast< sal_uInt16 >( aDXFLineInfo.nDashCount ) );
208  aLineInfo.SetDashLen( aDXFLineInfo.fDashLen * scale );
209  aLineInfo.SetDotCount( static_cast< sal_uInt16 >( aDXFLineInfo.nDotCount ) );
210  aLineInfo.SetDotLen( aDXFLineInfo.fDotLen * scale );
211  aLineInfo.SetDistance( aDXFLineInfo.fDistance * scale );
212 
213  if ( aLineInfo.GetDashCount() > 0 && aLineInfo.GetDashLen() == 0 )
214  aLineInfo.SetDashLen(1);
215 
216  if ( aLineInfo.GetDotCount() > 0 && aLineInfo.GetDotLen() == 0 )
217  aLineInfo.SetDotLen(1);
218 
219  return aLineInfo;
220 }
221 
223 {
224  return atan2(aMX.fy,aMX.fx)/3.14159265359*180.0;
225 }
226 
228 {
229  return aMZ.SProd(aMX*aMY)<0;
230 }
231 
232 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
double fx
Definition: dxfvec.hxx:55
void Transform(const DXFVector &rSrc, DXFVector &rTgt) const
Definition: dxfvec.cxx:143
double fDashLen
Definition: dxfvec.hxx:32
double fz
Definition: dxfvec.hxx:55
DXFVector Unit() const
Definition: dxfvec.cxx:35
sal_Int32 nDashCount
Definition: dxfvec.hxx:31
sal_Int32 nDotCount
Definition: dxfvec.hxx:33
double fDotLen
Definition: dxfvec.hxx:34
double fDistance
Definition: dxfvec.hxx:35
Unit
double CalcRotAngle() const
Definition: dxfvec.cxx:222
DXFVector aMP
Definition: dxfvec.hxx:148
void TransDir(const DXFVector &rSrc, DXFVector &rTgt) const
Definition: dxfvec.cxx:158
sal_Int32 scale
double fy
Definition: dxfvec.hxx:55
DXFVector aMZ
Definition: dxfvec.hxx:147
DXFVector(double fX=0.0, double fY=0.0, double fZ=0.0)
Definition: dxfvec.hxx:155
double Abs() const
Definition: dxfvec.cxx:29
double SProd(const DXFVector &rV) const
Definition: dxfvec.hxx:190
DXFVector aMX
Definition: dxfvec.hxx:145
LineStyle eStyle
Definition: dxfvec.hxx:30
bool TransCircleToEllipse(double fRadius, double &rEx, double &rEy) const
Definition: dxfvec.cxx:166
DXFTransform()
Definition: dxfvec.cxx:48
bool Mirror() const
Definition: dxfvec.cxx:227
DXFVector aMY
Definition: dxfvec.hxx:146