From f55ba97f90171ce3138b08f1a615a2598f0fe9d1 Mon Sep 17 00:00:00 2001
From: vpa <vpa@opencascade.com>
Date: Wed, 20 Jan 2016 22:11:02 +0300
Subject: [PATCH] 0027083: Visualization, Ray Tracing - shape with visible face
 boundaries disappears after turning the ray-tracing on

- default state of aspects is now restored to prevent backface culling which is not supported by ray-tracing yet;
- added test case for issue #27083
---
 src/OpenGl/OpenGl_View_Redraw.cxx |  4 ++++
 tests/bugs/vis/bug27083           | 29 +++++++++++++++++++++++++++++
 2 files changed, 33 insertions(+)
 create mode 100644 tests/bugs/vis/bug27083

diff --git a/src/OpenGl/OpenGl_View_Redraw.cxx b/src/OpenGl/OpenGl_View_Redraw.cxx
index aeabc27612..1cb1cdf92e 100644
--- a/src/OpenGl/OpenGl_View_Redraw.cxx
+++ b/src/OpenGl/OpenGl_View_Redraw.cxx
@@ -1105,6 +1105,10 @@ void OpenGl_View::renderStructs (Graphic3d_Camera::Projection theProjection,
         aCtx->arbFBO->glBindFramebuffer (GL_FRAMEBUFFER, 0);
       }
 
+      // Reset OpenGl aspects state to default to avoid enabling of
+      // backface culling which is not supported in ray-tracing.
+      myWorkspace->ResetAppliedAspect();
+
       // Ray-tracing polygonal primitive arrays
       raytrace (aSizeX, aSizeY, theProjection, theReadDrawFbo, aCtx);
 
diff --git a/tests/bugs/vis/bug27083 b/tests/bugs/vis/bug27083
new file mode 100644
index 0000000000..9311674ed1
--- /dev/null
+++ b/tests/bugs/vis/bug27083
@@ -0,0 +1,29 @@
+puts "========"
+puts "OCC27083"
+puts "========"
+puts ""
+##################################################################
+puts "Visualization, Ray Tracing - shape with visible face boundaries disappears after turning the ray-tracing on"
+##################################################################
+
+pload VISUALIZATION MODELING
+
+box b 1 1 1
+
+vinit
+
+vdisplay b
+vfit
+vsetdispmode 1
+vshowfaceboundary b 1 255 0 0 3
+vraytrace 1
+
+if {[vreadpixel 295 255 name] != "GOLDENROD4 0"} {
+  puts "ERROR: the box with boundary aspect set is not shown in ray-tracing mode!"
+}
+
+if {[vreadpixel 105 58 name] != "RED 0"} {
+  puts "ERROR: the box's boundaries are not shown in ray-tracing mode!"
+}
+
+vdump $imagedir/${casename}.png