move bounding box helper functions to linalg. put bbox code in export_png

1 files changed, 26 insertions, 1 deletions

diff --git a/src/export_png.cc b/src/export_png.cc
index 96e30fa..25e99a0 100644
--- a/src/export_png.cc
+++ b/src/export_png.cc
@@ -3,7 +3,9 @@
 #include "OffscreenView.h"
 #include "CsgInfo.h"
 #include <stdio.h>
-
+#include "CGALRenderer.h"
+#include "CGAL_renderer.h"
+#include "cgal.h"
 #ifdef ENABLE_CGAL
 
 void export_png_with_cgal(CGAL_Nef_polyhedron *root_N, std::ostream &output)
@@ -14,6 +16,29 @@ void export_png_with_cgal(CGAL_Nef_polyhedron *root_N, std::ostream &output)
 	} catch (int error) {
 		fprintf(stderr,"Can't create OpenGL OffscreenView. Code: %i.\n", error);
 	}
+	CGALRenderer cgalRenderer(*root_N);
+
+	BoundingBox bbox;
+	if (cgalRenderer.polyhedron) {
+		CGAL::Bbox_3 cgalbbox = cgalRenderer.polyhedron->bbox();
+		bbox = BoundingBox(Vector3d(cgalbbox.xmin(), cgalbbox.ymin(), cgalbbox.zmin()),
+		  Vector3d(cgalbbox.xmax(), cgalbbox.ymax(), cgalbbox.zmax()));
+	}
+	else if (cgalRenderer.polyset) {
+		bbox = cgalRenderer.polyset->getBoundingBox();
+	}
+
+	Vector3d center = getBoundingCenter(bbox);
+	double radius = getBoundingRadius(bbox);
+
+	Vector3d cameradir(1, 1, -0.5);
+	Vector3d camerapos = center - radius*2*cameradir;
+/*
+	csgInfo.glview->setCamera(camerapos, center);
+	csgInfo.glview->setRenderer(&cgalRenderer);
+        csgInfo.glview->paintGL();
+        csgInfo.glview->save(outfile);
+*/
 	output << "solid OpenSCAD_Model\n";
 	output << "endsolid OpenSCAD_Model\n";
 }