Updated cgltf.

3rdparty/cgltf/cgltf_write.h

@@ -1,7 +1,7 @@
 /**
  * cgltf_write - a single-file glTF 2.0 writer written in C99.
  *
- * Version: 1.6
+ * Version: 1.7
  *
  * Website: https://github.com/jkuhlmann/cgltf
  *
@@ -75,6 +75,7 @@ cgltf_size cgltf_write(const cgltf_options* options, char* buffer, cgltf_size si
 #define CGLTF_EXTENSION_FLAG_LIGHTS_PUNCTUAL        (1 << 3)
 #define CGLTF_EXTENSION_FLAG_DRACO_MESH_COMPRESSION (1 << 4)
 #define CGLTF_EXTENSION_FLAG_MATERIALS_CLEARCOAT    (1 << 5)
+#define CGLTF_EXTENSION_FLAG_MATERIALS_TRANSMISSION (1 << 6)
 
 typedef struct {
 	char* buffer;
@@ -502,6 +503,11 @@ static void cgltf_write_material(cgltf_write_context* context, const cgltf_mater
 		context->extension_flags |= CGLTF_EXTENSION_FLAG_MATERIALS_CLEARCOAT;
 	}
 
+	if (material->has_transmission)
+	{
+		context->extension_flags |= CGLTF_EXTENSION_FLAG_MATERIALS_TRANSMISSION;
+	}
+
 	if (material->has_pbr_metallic_roughness)
 	{
 		const cgltf_pbr_metallic_roughness* params = &material->pbr_metallic_roughness;
@@ -518,7 +524,7 @@ static void cgltf_write_material(cgltf_write_context* context, const cgltf_mater
 		cgltf_write_line(context, "}");
 	}
 
-	if (material->unlit || material->has_pbr_specular_glossiness || material->has_clearcoat)
+	if (material->unlit || material->has_pbr_specular_glossiness || material->has_clearcoat || material->has_transmission)
 	{
 		cgltf_write_line(context, "\"extensions\": {");
 		if (material->has_clearcoat)
@@ -532,6 +538,14 @@ static void cgltf_write_material(cgltf_write_context* context, const cgltf_mater
 			cgltf_write_floatprop(context, "clearcoatRoughnessFactor", params->clearcoat_roughness_factor, 0.0f);
 			cgltf_write_line(context, "}");
 		}
+		if (material->has_transmission)
+		{
+			const cgltf_transmission* params = &material->transmission;
+			cgltf_write_line(context, "\"KHR_materials_transmission\": {");
+			CGLTF_WRITE_TEXTURE_INFO("transmissionTexture", params->transmission_texture);
+			cgltf_write_floatprop(context, "transmissionFactor", params->transmission_factor, 0.0f);
+			cgltf_write_line(context, "}");
+		}
 		if (material->has_pbr_specular_glossiness)
 		{
 			const cgltf_pbr_specular_glossiness* params = &material->pbr_specular_glossiness;
@@ -900,6 +914,9 @@ static void cgltf_write_extensions(cgltf_write_context* context, uint32_t extens
 	if (extension_flags & CGLTF_EXTENSION_FLAG_MATERIALS_CLEARCOAT) {
 		cgltf_write_stritem(context, "KHR_materials_clearcoat");
 	}
+	if (extension_flags & CGLTF_EXTENSION_FLAG_MATERIALS_TRANSMISSION) {
+		cgltf_write_stritem(context, "KHR_materials_transmission");
+	}
 }
 
 cgltf_size cgltf_write(const cgltf_options* options, char* buffer, cgltf_size size, const cgltf_data* data)
@@ -1084,6 +1101,8 @@ cgltf_size cgltf_write(const cgltf_options* options, char* buffer, cgltf_size si
 		cgltf_write_line(context, "]");
 	}
 
+	cgltf_write_extras(context, &data->extras);
+
 	CGLTF_SPRINTF("\n}\n");
 
 	// snprintf does not include the null terminator in its return value, so be sure to include it