Eevee: LightCache: Initial Implementation

This separate probe rendering from viewport rendering, making possible to
run the baking in another thread (non blocking and faster).

The baked lighting is saved in the blend file. Nothing needs to be
recomputed on load.

There is a few missing bits / bugs:
- Cache cannot be saved to disk as a separate file, it is saved in the DNA
  for now making file larger and memory usage higher.
- Auto update only cubemaps does update the grids (bug).
- Probes cannot be updated individually (considered as dynamic).
- Light Cache cannot be (re)generated during render.

1 files changed, 32 insertions, 0 deletions

diff --git a/source/blender/makesrna/intern/rna_scene.c b/source/blender/makesrna/intern/rna_scene.c
index 6b312634b50..68b1f5a74aa 100644
--- a/source/blender/makesrna/intern/rna_scene.c
+++ b/source/blender/makesrna/intern/rna_scene.c
@@ -5815,6 +5815,38 @@ static void rna_def_scene_eevee(BlenderRNA *brna)
 	                               "Size of the shadow map applied to each irradiance sample");
 	RNA_def_property_override_flag(prop, PROPOVERRIDE_OVERRIDABLE_STATIC);
 
+	prop = RNA_def_property(srna, "gi_show_irradiance", PROP_BOOLEAN, PROP_NONE);
+	RNA_def_property_boolean_sdna(prop, NULL, "flag", SCE_EEVEE_SHOW_IRRADIANCE);
+	RNA_def_property_boolean_default(prop, 0);
+	RNA_def_property_ui_text(prop, "Show Irradiance Cache", "Display irradiance samples in the viewport");
+	RNA_def_property_override_flag(prop, PROPOVERRIDE_OVERRIDABLE_STATIC);
+
+	prop = RNA_def_property(srna, "gi_show_cubemaps", PROP_BOOLEAN, PROP_NONE);
+	RNA_def_property_boolean_sdna(prop, NULL, "flag", SCE_EEVEE_SHOW_CUBEMAPS);
+	RNA_def_property_boolean_default(prop, 0);
+	RNA_def_property_ui_text(prop, "Show Cubemap Cache", "Display captured cubemaps in the viewport");
+	RNA_def_property_override_flag(prop, PROPOVERRIDE_OVERRIDABLE_STATIC);
+
+	prop = RNA_def_property(srna, "gi_irradiance_draw_size", PROP_FLOAT, PROP_NONE);
+	RNA_def_property_range(prop, 0.05f, 10.0f);
+	RNA_def_property_float_default(prop, 0.1f);
+	RNA_def_property_ui_text(prop, "Irradiance Draw Size", "Size of the irradiance sample spheres to debug captured light");
+
+	prop = RNA_def_property(srna, "gi_cubemap_draw_size", PROP_FLOAT, PROP_NONE);
+	RNA_def_property_range(prop, 0.05f, 10.0f);
+	RNA_def_property_float_default(prop, 0.3f);
+	RNA_def_property_ui_text(prop, "Cubemap Draw Size", "Size of the cubemap spheres to debug captured light");
+
+	prop = RNA_def_property(srna, "gi_auto_bake", PROP_BOOLEAN, PROP_NONE);
+	RNA_def_property_boolean_sdna(prop, NULL, "flag", SCE_EEVEE_GI_AUTOBAKE);
+	RNA_def_property_boolean_default(prop, 0);
+	RNA_def_property_ui_text(prop, "Auto Bake", "Auto bake indirect lighting when editing probes");
+
+	prop = RNA_def_property(srna, "gi_cache_info", PROP_STRING, PROP_NONE);
+	RNA_def_property_string_sdna(prop, NULL, "light_cache_info");
+	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
+	RNA_def_property_ui_text(prop, "Light Cache Info", "Info on current cache status");
+
 	/* Temporal Anti-Aliasing (super sampling) */
 	prop = RNA_def_property(srna, "taa_samples", PROP_INT, PROP_NONE);
 	RNA_def_property_int_default(prop, 16);