fixed SimpleRaycaster not writing depth image

modules/vis/processors/simpleraycaster.cpp

@@ -68,8 +68,10 @@ namespace campvis {
         if (p_enableShadowing.getValue())
             _shader->setUniform("_shadowIntensity", p_shadowIntensity.getValue());
 
+        glEnable(GL_DEPTH_TEST);
         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
         QuadRdr.renderQuad();
+        glDisable(GL_DEPTH_TEST);
         LGL_ERROR;
 
         output.second->deactivate();

modules/vis/processors/volumerenderer.cpp

@@ -115,6 +115,7 @@ namespace campvis {
         }
         else if (getInvalidationLevel() & RAYCASTER_INVALID) {
             _raycaster.process(data);
+            p_outputImage.issueWrite();
         }
 
         validate(INVALID_RESULT | PG_INVALID | EEP_INVALID | RAYCASTER_INVALID);