More flexible size options for particle billboards. This adds scale factors for width and height of billboards, relative to the particle size. It's useful when the particle size is primarily used for collision and the like, so the billboard appearance can be adjusted independently. Also allows non-square billboards.

In addition the billboards can be scaled by the particle velocity with optional head and tail factors (similar to line drawing options). This allows for pseudo-motionblur effects.

1 files changed, 24 insertions, 5 deletions

diff --git a/source/blender/makesrna/intern/rna_particle.c b/source/blender/makesrna/intern/rna_particle.c
index 4913e98a0af..30fce5716a9 100644
--- a/source/blender/makesrna/intern/rna_particle.c
+++ b/source/blender/makesrna/intern/rna_particle.c
@@ -1757,11 +1757,6 @@ static void rna_def_particle_settings(BlenderRNA *brna)
 	RNA_def_property_ui_text(prop, "Absolute Path Time", "Path timing is in absolute frames");
 	RNA_def_property_update(prop, 0, "rna_Particle_abspathtime_update");
 
-	prop= RNA_def_property(srna, "lock_billboard", PROP_BOOLEAN, PROP_NONE);
-	RNA_def_property_boolean_sdna(prop, NULL, "draw", PART_DRAW_BB_LOCK);
-	RNA_def_property_ui_text(prop, "Lock Billboard", "Lock the billboards align axis");
-	RNA_def_property_update(prop, 0, "rna_Particle_redo");
-
 	prop= RNA_def_property(srna, "use_parent_particles", PROP_BOOLEAN, PROP_NONE);
 	RNA_def_property_boolean_sdna(prop, NULL, "draw", PART_DRAW_PARENT);
 	RNA_def_property_ui_text(prop, "Parents", "Render parent particles");
@@ -1910,6 +1905,11 @@ static void rna_def_particle_settings(BlenderRNA *brna)
 	RNA_def_property_update(prop, 0, "rna_Particle_redo_child");
 
 	/* billboards */
+	prop= RNA_def_property(srna, "lock_billboard", PROP_BOOLEAN, PROP_NONE);
+	RNA_def_property_boolean_sdna(prop, NULL, "draw", PART_DRAW_BB_LOCK);
+	RNA_def_property_ui_text(prop, "Lock Billboard", "Lock the billboards align axis");
+	RNA_def_property_update(prop, 0, "rna_Particle_redo");
+
 	prop= RNA_def_property(srna, "billboard_align", PROP_ENUM, PROP_NONE);
 	RNA_def_property_enum_sdna(prop, NULL, "bb_align");
 	RNA_def_property_enum_items(prop, bb_align_items);
@@ -1958,6 +1958,25 @@ static void rna_def_particle_settings(BlenderRNA *brna)
 	RNA_def_property_ui_text(prop, "Billboard Offset", "");
 	RNA_def_property_update(prop, 0, "rna_Particle_redo");
 
+	prop= RNA_def_property(srna, "billboard_size", PROP_FLOAT, PROP_FACTOR);
+	RNA_def_property_float_sdna(prop, NULL, "bb_size");
+	RNA_def_property_array(prop, 2);
+	RNA_def_property_range(prop, 0.001f, 10.0f);
+	RNA_def_property_ui_text(prop, "Billboard Scale", "Scale billboards relative to particle size");
+	RNA_def_property_update(prop, 0, "rna_Particle_redo");
+
+	prop= RNA_def_property(srna, "billboard_velocity_head", PROP_FLOAT, PROP_FACTOR);
+	RNA_def_property_float_sdna(prop, NULL, "bb_vel_head");
+	RNA_def_property_range(prop, 0.0f, 10.0f);
+	RNA_def_property_ui_text(prop, "Billboard Velocity Head", "Scale billboards by velocity");
+	RNA_def_property_update(prop, 0, "rna_Particle_redo");
+
+	prop= RNA_def_property(srna, "billboard_velocity_tail", PROP_FLOAT, PROP_FACTOR);
+	RNA_def_property_float_sdna(prop, NULL, "bb_vel_tail");
+	RNA_def_property_range(prop, 0.0f, 10.0f);
+	RNA_def_property_ui_text(prop, "Billboard Velocity Tail", "Scale billboards by velocity");
+	RNA_def_property_update(prop, 0, "rna_Particle_redo");
+
 	/* simplification */
 	prop= RNA_def_property(srna, "use_simplify", PROP_BOOLEAN, PROP_NONE);
 	RNA_def_property_boolean_sdna(prop, NULL, "simplify_flag", PART_SIMPLIFY_ENABLE);