Sculpt: Cloth Brush simulation area property

This makes possible to choose between a local and a global simulation
when the cloth brush is used. Local simulation is the current default.
When global simulation is enabled, the cloth brush simulates the entire
mesh without taking any simulation limits into account.

This was possible before by setting the simulation limits to 10 (the
current maximum value allowed) so the entire mesh was inside the limits,
but this was a hack as the limits scale with the radius and there should
not be any limitation on how big the simulated area can be to be able to
simulate an entire object. This also allows to make a more clear
distinction between cloth brush presets that are intended to be used in
local areas to add details or globally to generate the base shape of the
mesh.

Reviewed By: sergey

Differential Revision: https://developer.blender.org/D8481

1 files changed, 6 insertions, 4 deletions

diff --git a/source/blender/editors/sculpt_paint/paint_cursor.c b/source/blender/editors/sculpt_paint/paint_cursor.c
index e3027ead1f1..c5f1063d494 100644
--- a/source/blender/editors/sculpt_paint/paint_cursor.c
+++ b/source/blender/editors/sculpt_paint/paint_cursor.c
@@ -1612,8 +1612,9 @@ static void paint_cursor_draw_3d_view_brush_cursor_inactive(PaintCursorContext *
   /* Main inactive cursor. */
   paint_cursor_draw_main_inactive_cursor(pcontext);
 
-  /* Cloth brush simulation areas. */
-  if (brush->sculpt_tool == SCULPT_TOOL_CLOTH) {
+  /* Cloth brush local simulation areas. */
+  if (brush->sculpt_tool == SCULPT_TOOL_CLOTH &&
+      brush->cloth_simulation_area_type == BRUSH_CLOTH_SIMULATION_AREA_LOCAL) {
     const float white[3] = {1.0f, 1.0f, 1.0f};
     const float zero_v[3] = {0.0f};
     /* This functions sets its own drawing space in order to draw the simulation limits when the
@@ -1691,9 +1692,10 @@ static void paint_cursor_cursor_draw_3d_view_brush_cursor_active(PaintCursorCont
       SCULPT_cloth_plane_falloff_preview_draw(
           pcontext->pos, ss, pcontext->outline_col, pcontext->outline_alpha);
     }
-    else if (brush->cloth_force_falloff_type == BRUSH_CLOTH_FORCE_FALLOFF_RADIAL) {
+    else if (brush->cloth_force_falloff_type == BRUSH_CLOTH_FORCE_FALLOFF_RADIAL &&
+             brush->cloth_simulation_area_type == BRUSH_CLOTH_SIMULATION_AREA_LOCAL) {
       /* Display the simulation limits if sculpting outside them. */
-      /* This does not makes much sense of plane fallof as the fallof is infinte. */
+      /* This does not makes much sense of plane fallof as the fallof is infinte or global. */
 
       if (len_v3v3(ss->cache->true_location, ss->cache->true_initial_location) >
           ss->cache->radius * (1.0f + brush->cloth_sim_limit)) {