Ocean modifier: Expose eigenvectors for use as map

The eigenvectors in the ocean modifier (plus and minus) can be useful,
but are not exposed. Assuming the particle system was capable, the
eigenvectors could be used to drive spray emission velocities.

This exposes the controls to allow a map to be generated from these
eigenvectors. Currently, the values are mapped into a 0-255 range
similar to foam.

Differential Revision: https://developer.blender.org/D7182

1 files changed, 18 insertions, 0 deletions

diff --git a/source/blender/makesrna/intern/rna_modifier.c b/source/blender/makesrna/intern/rna_modifier.c
index e8d5d75097a..fd7b6b3f0d6 100644
--- a/source/blender/makesrna/intern/rna_modifier.c
+++ b/source/blender/makesrna/intern/rna_modifier.c
@@ -5587,6 +5587,24 @@ static void rna_def_modifier_ocean(BlenderRNA *brna)
   RNA_def_property_ui_text(prop, "Generate Foam", "Generate foam mask as a vertex color channel");
   RNA_def_property_update(prop, 0, "rna_OceanModifier_init_update");
 
+  prop = RNA_def_property(srna, "use_spray", PROP_BOOLEAN, PROP_NONE);
+  RNA_def_property_boolean_sdna(prop, NULL, "flag", MOD_OCEAN_GENERATE_SPRAY);
+  RNA_def_property_clear_flag(prop, PROP_ANIMATABLE);
+  RNA_def_property_ui_text(
+      prop, "Generate Spray Map", "Generate map of spray direction as a vertex color channel");
+  RNA_def_property_update(prop, 0, "rna_OceanModifier_init_update");
+
+  prop = RNA_def_property(srna, "invert_spray", PROP_BOOLEAN, PROP_NONE);
+  RNA_def_property_boolean_sdna(prop, NULL, "flag", MOD_OCEAN_INVERT_SPRAY);
+  RNA_def_property_ui_text(prop, "Invert Spray", "Invert the spray direction map");
+  RNA_def_property_update(prop, 0, "rna_OceanModifier_init_update");
+
+  prop = RNA_def_property(srna, "spray_layer_name", PROP_STRING, PROP_NONE);
+  RNA_def_property_string_sdna(prop, NULL, "spraylayername");
+  RNA_def_property_ui_text(
+      prop, "Spray Map", "Name of the vertex color layer used for the spray direction map");
+  RNA_def_property_update(prop, 0, "rna_OceanModifier_init_update");
+
   prop = RNA_def_property(srna, "resolution", PROP_INT, PROP_UNSIGNED);
   RNA_def_property_int_sdna(prop, NULL, "resolution");
   RNA_def_property_clear_flag(prop, PROP_ANIMATABLE);