Smoke: expose empty space clipping property to the UI.

This is used to determine which voxels are to be considered empty space.

Previously it was hardcoded for converting dense grids to OpenVDB grids
to reduce disk space usage.

This value is also useful for rendering engines to know, i.e. to
optimize ray marching.

1 files changed, 16 insertions, 16 deletions

diff --git a/source/blender/blenkernel/intern/pointcache.c b/source/blender/blenkernel/intern/pointcache.c
index a84dc056015..5b36b0f9f84 100644
--- a/source/blender/blenkernel/intern/pointcache.c
+++ b/source/blender/blenkernel/intern/pointcache.c
@@ -972,20 +972,20 @@ static int ptcache_smoke_openvdb_write(struct OpenVDBWriter *writer, void *smoke
 
 		smoke_turbulence_export(sds->wt, &dens, &react, &flame, &fuel, &r, &g, &b, &tcu, &tcv, &tcw);
 
-		wt_density_grid = OpenVDB_export_grid_fl(writer, "density", dens, sds->res_wt, sds->fluidmat_wt, NULL);
+		wt_density_grid = OpenVDB_export_grid_fl(writer, "density", dens, sds->res_wt, sds->fluidmat_wt, sds->clipping, NULL);
 		clip_grid = wt_density_grid;
 
 		if (fluid_fields & SM_ACTIVE_FIRE) {
-			OpenVDB_export_grid_fl(writer, "flame", flame, sds->res_wt, sds->fluidmat_wt, wt_density_grid);
-			OpenVDB_export_grid_fl(writer, "fuel", fuel, sds->res_wt, sds->fluidmat_wt, wt_density_grid);
-			OpenVDB_export_grid_fl(writer, "react", react, sds->res_wt, sds->fluidmat_wt, wt_density_grid);
+			OpenVDB_export_grid_fl(writer, "flame", flame, sds->res_wt, sds->fluidmat_wt, sds->clipping, wt_density_grid);
+			OpenVDB_export_grid_fl(writer, "fuel", fuel, sds->res_wt, sds->fluidmat_wt, sds->clipping, wt_density_grid);
+			OpenVDB_export_grid_fl(writer, "react", react, sds->res_wt, sds->fluidmat_wt, sds->clipping, wt_density_grid);
 		}
 
 		if (fluid_fields & SM_ACTIVE_COLORS) {
-			OpenVDB_export_grid_vec(writer, "color", r, g, b, sds->res_wt, sds->fluidmat_wt, VEC_INVARIANT, true, wt_density_grid);
+			OpenVDB_export_grid_vec(writer, "color", r, g, b, sds->res_wt, sds->fluidmat_wt, VEC_INVARIANT, true, sds->clipping, wt_density_grid);
 		}
 
-		OpenVDB_export_grid_vec(writer, "texture coordinates", tcu, tcv, tcw, sds->res, sds->fluidmat, VEC_INVARIANT, false, wt_density_grid);
+		OpenVDB_export_grid_vec(writer, "texture coordinates", tcu, tcv, tcw, sds->res, sds->fluidmat, VEC_INVARIANT, false, sds->clipping, wt_density_grid);
 	}
 
 	if (sds->fluid) {
@@ -1000,32 +1000,32 @@ static int ptcache_smoke_openvdb_write(struct OpenVDBWriter *writer, void *smoke
 		OpenVDBWriter_add_meta_fl(writer, "blender/smoke/dt", dt);
 
 		const char *name = (!sds->wt) ? "density" : "density_low";
-		density_grid = OpenVDB_export_grid_fl(writer, name, dens, sds->res, sds->fluidmat, NULL);
+		density_grid = OpenVDB_export_grid_fl(writer, name, dens, sds->res, sds->fluidmat, sds->clipping, NULL);
 		clip_grid = sds->wt ? clip_grid : density_grid;
 
-		OpenVDB_export_grid_fl(writer, "shadow", sds->shadow, sds->res, sds->fluidmat, NULL);
+		OpenVDB_export_grid_fl(writer, "shadow", sds->shadow, sds->res, sds->fluidmat, sds->clipping, NULL);
 
 		if (fluid_fields & SM_ACTIVE_HEAT) {
-			OpenVDB_export_grid_fl(writer, "heat", heat, sds->res, sds->fluidmat, clip_grid);
-			OpenVDB_export_grid_fl(writer, "heat_old", heatold, sds->res, sds->fluidmat, clip_grid);
+			OpenVDB_export_grid_fl(writer, "heat", heat, sds->res, sds->fluidmat, sds->clipping, clip_grid);
+			OpenVDB_export_grid_fl(writer, "heat_old", heatold, sds->res, sds->fluidmat, sds->clipping, clip_grid);
 		}
 
 		if (fluid_fields & SM_ACTIVE_FIRE) {
 			name = (!sds->wt) ? "flame" : "flame_low";
-			OpenVDB_export_grid_fl(writer, name, flame, sds->res, sds->fluidmat, density_grid);
+			OpenVDB_export_grid_fl(writer, name, flame, sds->res, sds->fluidmat, sds->clipping, density_grid);
 			name = (!sds->wt) ? "fuel" : "fuel_low";
-			OpenVDB_export_grid_fl(writer, name, fuel, sds->res, sds->fluidmat, density_grid);
+			OpenVDB_export_grid_fl(writer, name, fuel, sds->res, sds->fluidmat, sds->clipping, density_grid);
 			name = (!sds->wt) ? "react" : "react_low";
-			OpenVDB_export_grid_fl(writer, name, react, sds->res, sds->fluidmat, density_grid);
+			OpenVDB_export_grid_fl(writer, name, react, sds->res, sds->fluidmat, sds->clipping, density_grid);
 		}
 
 		if (fluid_fields & SM_ACTIVE_COLORS) {
 			name = (!sds->wt) ? "color" : "color_low";
-			OpenVDB_export_grid_vec(writer, name, r, g, b, sds->res, sds->fluidmat, VEC_INVARIANT, true, density_grid);
+			OpenVDB_export_grid_vec(writer, name, r, g, b, sds->res, sds->fluidmat, VEC_INVARIANT, true, sds->clipping, density_grid);
 		}
 
-		OpenVDB_export_grid_vec(writer, "velocity", vx, vy, vz, sds->res, sds->fluidmat, VEC_CONTRAVARIANT_RELATIVE, false, clip_grid);
-		OpenVDB_export_grid_ch(writer, "obstacles", obstacles, sds->res, sds->fluidmat, NULL);
+		OpenVDB_export_grid_vec(writer, "velocity", vx, vy, vz, sds->res, sds->fluidmat, VEC_CONTRAVARIANT_RELATIVE, false, sds->clipping, clip_grid);
+		OpenVDB_export_grid_ch(writer, "obstacles", obstacles, sds->res, sds->fluidmat, sds->clipping, NULL);
 	}
 
 	return 1;