From 8f30696a4d210eda84fc66c45626fee0aa2aaad4 Mon Sep 17 00:00:00 2001
From: Josef Heinen <j.heinen@fz-juelich.de>
Date: Sat, 16 Feb 2019 18:03:21 +0100
Subject: [PATCH] gr: added support for volume plots

---
 src/backends.jl    | 2 +-
 src/backends/gr.jl | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/backends.jl b/src/backends.jl
index 11d0a414..70fba5da 100644
--- a/src/backends.jl
+++ b/src/backends.jl
@@ -351,7 +351,7 @@ const _gr_attr = merge_with_base_supported([
 const _gr_seriestype = [
     :path, :scatter, :straightline,
     :heatmap, :pie, :image,
-    :contour, :path3d, :scatter3d, :surface, :wireframe,
+    :contour, :path3d, :scatter3d, :surface, :wireframe, :volume,
     :shape
 ]
 const _gr_style = [:auto, :solid, :dash, :dot, :dashdot, :dashdotdot]
diff --git a/src/backends/gr.jl b/src/backends/gr.jl
index 45a968d0..e79270c2 100644
--- a/src/backends/gr.jl
+++ b/src/backends/gr.jl
@@ -1067,6 +1067,11 @@ function gr_display(sp::Subplot{GRBackend}, w, h, viewport_canvas)
                 GR.surface(x, y, z, GR.OPTION_FILLED_MESH)
             end
 
+        elseif st == :volume
+            sp[:legend] = :none
+            GR.gr3.clear()
+            dmin, dmax = GR.gr3.volume(y.v, 0)
+
         elseif st == :heatmap
             xmin, xmax, ymin, ymax = xy_lims
             zmin, zmax = clims