dwg2svg.exe outputs empty svg file

[Aabha-cell]

I downloaded the libredwg-0.12.5.5885-win64.zip and extracted it. I'm trying to run the dwg2svg.exe. The svg file comes out empty. Please help.

[neskudlap]

The following changes in coords transformations helped me to keep the model (BLOCKS especially) in SVG page, also remember that converted elements can have empty fills or thin lines - thus invisible

--- a/programs/dwg2SVG.c
+++ b/programs/dwg2SVG.c
@@ -107,13 +107,13 @@ help (void)
 static double
 transform_X (double x)
 {
-  return x - model_xmin;
+  return x;//  -model_xmin;
 }

 static double
 transform_Y (double y)
 {
-  return page_height - (y - model_ymin);
+  return -y;//  page_height - (y - model_ymin); //-y; //
 }

 static bool
@@ -666,7 +666,7 @@ output_INSERT (Dwg_Object *obj)
               "rotate(%f) scale(%f %f)\" xlink:href=\"#symbol-" FORMAT_RLLx "\" />"
               "<!-- block_header->handleref: " FORMAT_H " -->\n",
               obj->index, transform_X (ins_pt.x), transform_Y (ins_pt.y),
-              (180.0 / M_PI) * insert->rotation, insert->scale.x,
+         360 - (180.0 / M_PI) * insert->rotation, insert->scale.x,
               insert->scale.y, insert->block_header->absolute_ref,
               ARGS_H (insert->block_header->handleref));
     }
@@ -855,7 +855,7 @@ output_SVG (Dwg_Data *dwg)
           "   version=\"1.1\" baseProfile=\"basic\"\n"
           "   width=\"100%%\" height=\"100%%\"\n"
           "   viewBox=\"%f %f %f %f\">\n",
-          model_xmin, model_ymin, page_width, page_height);
+          model_xmin, model_ymin - page_height, page_width, page_height);

[rurban]

Thanks for the tip, I'll try that

[fr-an-k]

I came across this issue as well; it seems only transform_X has to be changed as above, at least that improves it for now. If I apply all the above changes then y is incorrect. The above changes are not 100%, I'll investigate further.