Sculpt: Delay Viewport Updates

In Blender 2.81 we update and draw all nodes inside the view planes.
When navigating with a pen tablet after an operation that tags the whole
mesh to update (like undo or inverting the mask), this introduces some
lag as nodes are updating when they enter the view. The viewport is not
fully responsive again until all nodes have entered the view after the
operation.

This commit delays nodes updates until the view navigation stops, so the
viewport navigation is always fully responsive. This introduces some
artifacts while navigating,  so it can be disabled if you don't want to
see them.

I'm storing the update planes in the PBVH. This way I can add support
for some tools to update in real-time only the nodes inside this plane
while running the operator, like the mesh filter.

Reviewed By: jbakker

Differential Revision: https://developer.blender.org/D6269

1 files changed, 8 insertions, 0 deletions

diff --git a/source/blender/makesrna/intern/rna_sculpt_paint.c b/source/blender/makesrna/intern/rna_sculpt_paint.c
index f1a5cb79db4..f2d5c465dac 100644
--- a/source/blender/makesrna/intern/rna_sculpt_paint.c
+++ b/source/blender/makesrna/intern/rna_sculpt_paint.c
@@ -617,6 +617,14 @@ static void rna_def_paint(BlenderRNA *brna)
       prop, "Fast Navigate", "For multires, show low resolution while navigating the view");
   RNA_def_property_update(prop, NC_SCENE | ND_TOOLSETTINGS, NULL);
 
+  prop = RNA_def_property(srna, "use_sculpt_delay_updates", PROP_BOOLEAN, PROP_NONE);
+  RNA_def_property_boolean_sdna(prop, NULL, "flags", PAINT_SCULPT_DELAY_UPDATES);
+  RNA_def_property_ui_text(
+      prop,
+      "Delay Viewport Updates",
+      "Update the geometry when it enters the view, providing faster view navigation");
+  RNA_def_property_update(prop, NC_SCENE | ND_TOOLSETTINGS, NULL);
+
   prop = RNA_def_property(srna, "input_samples", PROP_INT, PROP_UNSIGNED);
   RNA_def_property_int_sdna(prop, NULL, "num_input_samples");
   RNA_def_property_ui_range(prop, 1, PAINT_MAX_INPUT_SAMPLES, 1, -1);