fix #1732

Packages/vcs/Lib/vcs2vtk.py

@@ -1199,7 +1199,7 @@ def prepFillarea(renWin, farea, cmap=None):
             if opacity is not None:
                 opacity = farea.opacity[i]
         else:
-            opacity = 100
+            opacity = None
         # Draw colored background for solid
         # transparent/white background for hatches/patterns
         if st == 'solid':

testing/vcs/CMakeLists.txt

@@ -11,6 +11,11 @@ cdat_add_test(vcs_verify_import
   "${PYTHON_EXECUTABLE}"
   ${cdat_SOURCE_DIR}/testing/vcs/test_vcs_import.py
 )
+cdat_add_test(vcs_fillarea_transparency
+  "${PYTHON_EXECUTABLE}"
+  ${cdat_SOURCE_DIR}/testing/vcs/test_vcs_fillarea_transparency.py
+  "${BASELINE_DIR}/test_vcs_fillarea_transparency.png"
+)
 cdat_add_test(vcs_test_bad_png_path
   "${PYTHON_EXECUTABLE}"
   ${cdat_SOURCE_DIR}/testing/vcs/test_bad_png_path.py

testing/vcs/test_vcs_fillarea_transparency.py

@@ -0,0 +1,36 @@
+import vcs
+import sys,os
+pth = os.path.join(os.path.dirname(__file__),"..")
+sys.path.append(pth)
+import checkimage
+
+x=vcs.init()
+x.setantialiasing(0)
+x.drawlogooff()
+x.setbgoutputdimensions(1200,1090,units="pixels")
+
+fa1 = x.createfillarea()
+
+fa1.x=[.2,.8,.8,.2]
+fa1.y = [.2,.2,.8,.8]
+fa1.color = 242
+
+fa2=x.createfillarea(source = fa1)
+
+fa2.x = [.1,.9,.9,.1]
+fa2.y = [.1,.1,.9,.9]
+
+cmap = x.createcolormap()
+cmap.setcolorcell(242,0,0,100,50)
+
+fa2.colormap = cmap
+
+x.plot(fa1)
+x.plot(fa2)
+
+fnm = os.path.split(__file__[:-2]+"png")[-1]
+x.png(fnm)
+src = sys.argv[1]
+
+ret = checkimage.check_result_image(fnm,src,checkimage.defaultThreshold)
+sys.exit(ret)