Added a bool check for initvolumeprog

modules/opengl/src/gmopenglmanager.cpp

@@ -631,6 +631,7 @@ namespace GL {
                  "  uniform bool depth_start;"
                  "  uniform bool black_white;"
                  "  uniform bool is_sliced;"
+                 "  uniform bool volume_toggle;"
                  //"  uniform vec3 slice_vec;"
                  "  uniform float sX;"
                  "  uniform float sY;"
@@ -765,11 +766,14 @@ namespace GL {
                  "      if( dst.a > 1.0 ) break;\n"
                  "\n"
                  "\n"
-                 "      position += direction * adaptive\n;"
+                 "      position += direction * adaptive;\n"
                  "\n"
                  "    }\n"
                  "\n"
-                 "    out_Color = dst;\n;"
+                 "if (volume_toggle) dst = vec4(texture(samplerDataVolume, textureCoord).rgba);"
+                 "    //dst = vec4(texture(samplerTransferFunction, textureCoord.x).r, 0, 0, 1);//"
+                 "\n"
+                 "    out_Color = dst;\n"
                  "\n}"
                  );