Fluidsim - Restoring simulation speed control (ZanQdo request)

This commit restores support for freezing or speeding up physics sims. Animate
the "Speed" parameter under Domain->Time, which controls a multiplier factor for
the rate at which the sim proceeds (i.e. the old "Fac-Tim" setting).

Notes:
* Subversion bumped to 4 to patch up defaults for new value so that old sim
files will still run correctly
* Names/descriptions could do with some tweaking
* Porting this across was not that obvious since quite a bit of stuff had
changed (as in, been cleaned up). However, from tests so far, it seems to work
well.

1 files changed, 5 insertions, 0 deletions

diff --git a/source/blender/makesrna/intern/rna_fluidsim.c b/source/blender/makesrna/intern/rna_fluidsim.c
index f853e7b8dd9..99a84fc8b39 100644
--- a/source/blender/makesrna/intern/rna_fluidsim.c
+++ b/source/blender/makesrna/intern/rna_fluidsim.c
@@ -340,6 +340,11 @@ static void rna_def_fluidsim_domain(BlenderRNA *brna)
 	RNA_def_property_range(prop, 0.001, 10);
 	RNA_def_property_ui_text(prop, "Real World Size", "Size of the simulation domain in metres");
 	
+	prop= RNA_def_property(srna, "simulation_rate", PROP_FLOAT, PROP_NONE);
+	RNA_def_property_float_sdna(prop, NULL, "animRate");
+	RNA_def_property_range(prop, 0.0, 100.0);
+	RNA_def_property_ui_text(prop, "Simulation Speed", "Fluid motion rate (0 = stationary, 1 = normal speed)");
+	
 	prop= RNA_def_property(srna, "viscosity_preset", PROP_ENUM, PROP_NONE);
 	RNA_def_property_enum_sdna(prop, NULL, "viscosityMode");
 	RNA_def_property_enum_items(prop, viscosity_items);