DXF: export "actual measurement" for dimensions.

The "actual measurement" DXF field contains the size of the dimension
as scaled on the drawing, as opposed to the size as written on
the label.

extlib/libdxfrw

@@ -1 +1 @@
-Subproject commit 62e4a3cd8b19b2406af5a01c0bc45e77c9294068
+Subproject commit 8d24e656fbd293cb953828389d01d362f2a1a8e0

src/exportvector.cpp

@@ -306,7 +306,7 @@ public:
                         Vector bp = SK.GetEntity(c->ptB)->PointGetNum();
                         Vector ref = ((ap.Plus(bp)).ScaledBy(0.5)).Plus(c->disp.offset);
                         writeAlignedDimension(xfrm(ap),  xfrm(bp), xfrm(ref),
-                                              xfrm(ref), c->Label(), c->GetStyle());
+                                              xfrm(ref), c->Label(), c->GetStyle(), c->valA);
                         break;
                     }
 
@@ -337,7 +337,8 @@ public:
                         Vector xdl = xfrm(lB).Minus(xfrm(lA));
                         writeLinearDimension(xfrm(pt), xfrm(refClosest), xfrm(ref),
                                              xfrm(ref), c->Label(),
-                                             atan2(xdl.y, xdl.x) / PI * 180.0 + 90.0, 0.0, c->GetStyle());
+                                             atan2(xdl.y, xdl.x) / PI * 180.0 + 90.0, 0.0,
+                                             c->GetStyle(), c->valA);
                         break;
                     }
 
@@ -356,11 +357,11 @@ public:
                         if(/*isRadius*/c->other) {
                             writeRadialDimension(
                                 xfrm(center), xfrm(center.Plus(rad)),
-                                xfrm(ref), c->Label(), c->GetStyle());
+                                xfrm(ref), c->Label(), c->GetStyle(), c->valA);
                         } else {
                             writeDiametricDimension(
                                 xfrm(center.Minus(rad)), xfrm(center.Plus(rad)),
-                                xfrm(ref), c->Label(), c->GetStyle());
+                                xfrm(ref), c->Label(), c->GetStyle(), c->valA);
                         }
                         break;
                     }
@@ -386,7 +387,7 @@ public:
 
                         writeAngularDimension(
                             xfrm(a0), xfrm(a0.Plus(da)), xfrm(b0), xfrm(b0.Plus(db)), xfrm(ref),
-                            xfrm(ref), c->Label(), c->GetStyle());
+                            xfrm(ref), c->Label(), c->GetStyle(), c->valA);
                         break;
                     }
 
@@ -540,7 +541,7 @@ public:
     }
 
     void writeAlignedDimension(Vector def1, Vector def2, Vector dimp,
-                               Vector textp, const std::string &text, hStyle hs) {
+                               Vector textp, const std::string &text, hStyle hs, double actual) {
         DRW_DimAligned dim;
         assignDimensionDefaults(&dim, hs);
         dim.setDef1Point(toCoord(def1));
@@ -548,12 +549,13 @@ public:
         dim.setDimPoint(toCoord(dimp));
         dim.setTextPoint(toCoord(textp));
         dim.setText(text);
+        dim.setActualMeasurement(actual);
         dxf->writeDimension(&dim);
     }
 
     void writeLinearDimension(Vector def1, Vector def2, Vector dimp,
                               Vector textp, const std::string &text,
-                              double angle, double oblique, hStyle hs) {
+                              double angle, double oblique, hStyle hs, double actual) {
         DRW_DimLinear dim;
         assignDimensionDefaults(&dim, hs);
         dim.setDef1Point(toCoord(def1));
@@ -563,33 +565,36 @@ public:
         dim.setText(text);
         dim.setAngle(angle);
         dim.setOblique(oblique);
+        dim.setActualMeasurement(actual);
         dxf->writeDimension(&dim);
     }
 
     void writeRadialDimension(Vector center, Vector radius,
-                              Vector textp, const std::string &text, hStyle hs) {
+                              Vector textp, const std::string &text, hStyle hs, double actual) {
         DRW_DimRadial dim;
         assignDimensionDefaults(&dim, hs);
         dim.setCenterPoint(toCoord(center));
         dim.setDiameterPoint(toCoord(radius));
         dim.setTextPoint(toCoord(textp));
         dim.setText(text);
+        dim.setActualMeasurement(actual);
         dxf->writeDimension(&dim);
     }
 
     void writeDiametricDimension(Vector def1, Vector def2,
-                                 Vector textp, const std::string &text, hStyle hs) {
+                                 Vector textp, const std::string &text, hStyle hs, double actual) {
         DRW_DimDiametric dim;
         assignDimensionDefaults(&dim, hs);
         dim.setDiameter1Point(toCoord(def1));
         dim.setDiameter2Point(toCoord(def2));
         dim.setTextPoint(toCoord(textp));
         dim.setText(text);
+        dim.setActualMeasurement(actual);
         dxf->writeDimension(&dim);
     }
 
     void writeAngularDimension(Vector fl1, Vector fl2, Vector sl1, Vector sl2, Vector dimp,
-                               Vector textp, const std::string &text, hStyle hs) {
+                               Vector textp, const std::string &text, hStyle hs, double actual) {
         DRW_DimAngular dim;
         assignDimensionDefaults(&dim, hs);
         dim.setFirstLine1(toCoord(fl1));
@@ -599,6 +604,7 @@ public:
         dim.setDimPoint(toCoord(dimp));
         dim.setTextPoint(toCoord(textp));
         dim.setText(text);
+        dim.setActualMeasurement(actual * PI / 180.0);
         dxf->writeDimension(&dim);
     }