Ocean: add new spectra modes to the ocean modifier

This extends the ocean modifier to add new spectra
(Pierson-Moskowitz, Jonswap, TMA).

These models are very different to the Phillips spectrum.
They are intended for more established,
large area, oceans and/or shallow water situations.

1 files changed, 20 insertions, 0 deletions

diff --git a/source/blender/makesdna/DNA_modifier_types.h b/source/blender/makesdna/DNA_modifier_types.h
index 042cf7e874f..13c5a0913c6 100644
--- a/source/blender/makesdna/DNA_modifier_types.h
+++ b/source/blender/makesdna/DNA_modifier_types.h
@@ -1255,6 +1255,19 @@ typedef struct OceanModifierData {
   float foam_coverage;
   float time;
 
+  char _pad1[4];
+
+  /* Spectrum being used. */
+  int spectrum;
+
+  /* Common JONSWAP parameters. */
+  /**
+   * This is the distance from a lee shore, called the fetch, or the distance
+   * over which the wind blows with constant velocity.
+   */
+  float fetch_jonswap;
+  float sharpen_peak_jonswap;
+
   int bakestart;
   int bakeend;
 
@@ -1287,6 +1300,13 @@ enum {
 };
 
 enum {
+  MOD_OCEAN_SPECTRUM_PHILLIPS = 0,
+  MOD_OCEAN_SPECTRUM_PIERSON_MOSKOWITZ = 1,
+  MOD_OCEAN_SPECTRUM_JONSWAP = 2,
+  MOD_OCEAN_SPECTRUM_TEXEL_MARSEN_ARSLOE = 3,
+};
+
+enum {
   MOD_OCEAN_GENERATE_FOAM = (1 << 0),
   MOD_OCEAN_GENERATE_NORMALS = (1 << 1),
 };