Update draw.py --include-curves

fix env var declaration

conda/build.sh

@@ -12,6 +12,8 @@ if [ `uname` == Darwin ]; then
   export LDFLAGS="$LDFLAGS  -Wl,-flat_namespace,-undefined,suppress"
 fi
 
+export SCHEMA_VERSIONS="2x3;4;4x3;4x3_add1"
+
 cmake -G Ninja \
  -DCMAKE_BUILD_TYPE=Release \
  -DCMAKE_INSTALL_PREFIX=$PREFIX \

src/ifcopenshell-python/ifcopenshell/draw.py

@@ -60,6 +60,7 @@ class draw_settings:
     merge_cells: bool = False
     include_projection: bool = True
     prefilter: bool = True
+    include_curves: bool = False
 
 
 def main(settings, files, iterators=None, merge_projection=True, progress_function=DO_NOTHING):
@@ -68,6 +69,7 @@ def main(settings, files, iterators=None, merge_projection=True, progress_functi
         # this is required for serialization
         APPLY_DEFAULT_MATERIALS=True,
         DISABLE_TRIANGULATION=True,
+        INCLUDE_CURVES=settings.include_curves,
         # when not doing booleans, proper solids from shells isn't a requirement
         SEW_SHELLS=settings.subtract_before_hlr,
     )

src/serializers/SvgSerializer.h

@@ -309,11 +309,16 @@ namespace {
 					}
 				} else {
 					gp_Pnt2d tmp;
-					for (int i = 0; i < 4; ++i) {
+					// 0,1,2,3 -> interp over bounding box edges (i%4, (i+1)%4)
+					// 4,5 -> interp over bounding box diagonals (i%4, (i+2)%4)
+					// @todo use boolean_utils.h points_on_planar_face_generator?
+					// ... or skip faces with inner bounds all together ?
+					// ... ?
+					for (int i = 0; i < 6; ++i) {
 						// @todo proper edge intersection
 						for (int j = 0; j < 16; ++j) {
-							const gp_Pnt2d& a = *loop[i];
-							const gp_Pnt2d& b = *loop[(i + 1) % 4];
+							const gp_Pnt2d& a = *loop[i % 4];
+							const gp_Pnt2d& b = *loop[(i + (i >= 4 ? 2 : 1)) % 4];
 							interp(a, b, j / 16.0, tmp);
 							if (fclass->Perform(tmp) == TopAbs_OUT) {
 								return false;