Debug drawing for simulations, to aid in visualizing abstract data such

as forces, velocities, contact points etc.

This uses a hash table to store debug elements (dots, lines, vectors at
this point). The hash table allows continuous display of elements that
are generated only in certain time steps, e.g. contact points, while
avoiding massive memory allocation. In any case, this system is really
a development feature, but very helpful in finding issues with the
internal solver data.

1 files changed, 6 insertions, 0 deletions

diff --git a/source/blender/editors/space_view3d/drawobject.c b/source/blender/editors/space_view3d/drawobject.c
index 55b621d5aba..e44012279b4 100644
--- a/source/blender/editors/space_view3d/drawobject.c
+++ b/source/blender/editors/space_view3d/drawobject.c
@@ -7488,6 +7488,12 @@ void draw_object(Scene *scene, ARegion *ar, View3D *v3d, Base *base, const short
 			}
 
 			draw_new_particle_system(scene, v3d, rv3d, base, psys, dt, dflag);
+
+			/* debug data */
+			if (psys->part->type == PART_HAIR) {
+				if (psys->clmd && psys->clmd->debug_data)
+					draw_sim_debug_data(scene, v3d, ar, base, psys->clmd->debug_data);
+			}
 		}
 		invert_m4_m4(ob->imat, ob->obmat);
 		view3d_cached_text_draw_end(v3d, ar, 0, NULL);