Eevee: Shadows: Add Contact Shadows

This add the possibility to add screen space raytraced shadows to fix light leaking cause by shadows maps.

Theses inherit of the same artifacts as other screenspace methods.

1 files changed, 35 insertions, 0 deletions

diff --git a/source/blender/makesrna/intern/rna_lamp.c b/source/blender/makesrna/intern/rna_lamp.c
index 15dabba0c4d..e40183e40b5 100644
--- a/source/blender/makesrna/intern/rna_lamp.c
+++ b/source/blender/makesrna/intern/rna_lamp.c
@@ -699,6 +699,41 @@ static void rna_def_lamp_shadow(StructRNA *srna, int spot, int area, int sun)
 	RNA_def_property_ui_text(prop, "Shadow Layer", "Objects on the same layers only cast shadows");
 	RNA_def_property_update(prop, 0, "rna_Lamp_update");
 
+	/* Eevee */
+	prop = RNA_def_property(srna, "use_contact_shadow", PROP_BOOLEAN, PROP_NONE);
+	RNA_def_property_boolean_sdna(prop, NULL, "mode", LA_SHAD_CONTACT);
+	RNA_def_property_ui_text(prop, "Contact Shadow", "Use screen space raytracing to have correct shadowing "
+	                                                 "near occluder, or for small features that does not appear "
+	                                                 "in shadow maps");
+	RNA_def_property_update(prop, 0, "rna_Lamp_update");
+
+	prop = RNA_def_property(srna, "contact_shadow_distance", PROP_FLOAT, PROP_DISTANCE);
+	RNA_def_property_float_sdna(prop, NULL, "contact_dist");
+	RNA_def_property_range(prop, 0.0f, 9999.0f);
+	RNA_def_property_ui_text(prop, "Contact Shadow Distance", "World space distance in which to search for "
+	                                                          "screen space occluder");
+	RNA_def_property_update(prop, 0, "rna_Lamp_update");
+
+	prop = RNA_def_property(srna, "contact_shadow_bias", PROP_FLOAT, PROP_NONE);
+	RNA_def_property_float_sdna(prop, NULL, "contact_bias");
+	RNA_def_property_range(prop, 0.001f, 9999.0f);
+	RNA_def_property_ui_range(prop, 0.001f, 5.0f, 1.0, 3);
+	RNA_def_property_ui_text(prop, "Contact Shadow Bias", "Bias to avoid self shadowing");
+	RNA_def_property_update(prop, 0, "rna_Lamp_update");
+
+	prop = RNA_def_property(srna, "contact_shadow_soft_size", PROP_FLOAT, PROP_NONE);
+	RNA_def_property_float_sdna(prop, NULL, "contact_spread");
+	RNA_def_property_range(prop, 0.0f, 9999.0f);
+	RNA_def_property_ui_text(prop, "Contact Shadow Soft", "Control how soft the contact shadows will be");
+	RNA_def_property_update(prop, 0, "rna_Lamp_update");
+
+	prop = RNA_def_property(srna, "contact_shadow_thickness", PROP_FLOAT, PROP_DISTANCE);
+	RNA_def_property_float_sdna(prop, NULL, "contact_thickness");
+	RNA_def_property_range(prop, 0.0f, 9999.0f);
+	RNA_def_property_ui_range(prop, 0, 100, 0.1, 3);
+	RNA_def_property_ui_text(prop, "Contact Shadow Thickness", "Pixel thickness used to detect occlusion");
+	RNA_def_property_update(prop, 0, "rna_Lamp_update");
+
 	if (sun) {
 		prop = RNA_def_property(srna, "shadow_cascade_max_distance", PROP_FLOAT, PROP_DISTANCE);
 		RNA_def_property_float_sdna(prop, NULL, "cascade_max_dist");