1 files changed, 52 insertions, 0 deletions

diff --git a/source/blender/editors/sculpt_paint/paint_cursor.c b/source/blender/editors/sculpt_paint/paint_cursor.c
index d5bb552b470..cabf17e8534 100644
--- a/source/blender/editors/sculpt_paint/paint_cursor.c
+++ b/source/blender/editors/sculpt_paint/paint_cursor.c
@@ -1526,11 +1526,21 @@ static void paint_draw_cursor(bContext *C, int x, int y, void *UNUSED(unused))
           immUniformColor3fvAlpha(outline_col, outline_alpha);
           GPU_line_width(2.0f);
           imm_draw_circle_wire_3d(pos, 0, 0, rds, 80);
+
           GPU_line_width(1.0f);
           immUniformColor3fvAlpha(outline_col, outline_alpha * 0.5f);
           imm_draw_circle_wire_3d(pos, 0, 0, rds * clamp_f(brush->alpha, 0.0f, 1.0f), 80);
           GPU_matrix_pop();
 
+          /* Cloth brush simulation areas. */
+          if (brush->sculpt_tool == SCULPT_TOOL_CLOTH) {
+            GPU_matrix_push();
+            const float white[3] = {1.0f, 1.0f, 1.0f};
+            SCULPT_cloth_simulation_limits_draw(
+                pos, brush, vc.obact->obmat, gi.location, gi.normal, rds, 1.0f, white, 0.25f);
+            GPU_matrix_pop();
+          }
+
           /* Update and draw dynamic mesh preview lines. */
           GPU_matrix_push();
           GPU_matrix_mul(vc.obact->obmat);
@@ -1620,6 +1630,48 @@ static void paint_draw_cursor(bContext *C, int x, int y, void *UNUSED(unused))
             GPU_matrix_pop_projection();
           }
 
+          if (brush->sculpt_tool == SCULPT_TOOL_CLOTH && !ss->cache->first_time) {
+            GPU_matrix_push_projection();
+            ED_view3d_draw_setup_view(CTX_wm_window(C),
+                                      CTX_data_depsgraph_pointer(C),
+                                      CTX_data_scene(C),
+                                      ar,
+                                      CTX_wm_view3d(C),
+                                      NULL,
+                                      NULL,
+                                      NULL);
+
+            /* Plane falloff preview */
+            if (brush->cloth_force_falloff_type == BRUSH_CLOTH_FORCE_FALLOFF_PLANE) {
+              GPU_matrix_push();
+              GPU_matrix_mul(vc.obact->obmat);
+              SCULPT_cloth_plane_falloff_preview_draw(pos, ss, outline_col, outline_alpha);
+              GPU_matrix_pop();
+            }
+
+            /* Display the simulation limits if sculpting outside them. */
+            /* This does not makes much sense of plane fallof as the fallof is infinte. */
+            else if (brush->cloth_force_falloff_type == BRUSH_CLOTH_FORCE_FALLOFF_RADIAL) {
+              if (len_v3v3(ss->cache->true_location, ss->cache->true_initial_location) >
+                  ss->cache->radius * (1.0f + brush->cloth_sim_limit)) {
+                const float red[3] = {1.0f, 0.2f, 0.2f};
+                GPU_matrix_push();
+                SCULPT_cloth_simulation_limits_draw(pos,
+                                                    brush,
+                                                    vc.obact->obmat,
+                                                    ss->cache->true_initial_location,
+                                                    ss->cache->true_initial_normal,
+                                                    ss->cache->radius,
+                                                    2.0f,
+                                                    red,
+                                                    0.8f);
+                GPU_matrix_pop();
+              }
+            }
+
+            GPU_matrix_pop_projection();
+          }
+
           wmWindowViewport(win);
         }
       }