Method bake

scene/3d/lightmap_gi.cpp:893–1488

}

LightmapGI::BakeError LightmapGI::bake(Node *p_from_node, String p_image_data_path, Lightmapper::BakeStepFunc p_bake_step, void *p_bake_userdata) {
	if (p_image_data_path.is_empty()) {
		if (get_light_data().is_null()) {
			return BAKE_ERROR_NO_SAVE_PATH;
		}

		p_image_data_path = get_light_data()->get_path();
		if (!p_image_data_path.is_resource_file()) {
			return BAKE_ERROR_NO_SAVE_PATH;
		}
	}

	Ref<Lightmapper> lightmapper = Lightmapper::create();
	ERR_FAIL_COND_V(lightmapper.is_null(), BAKE_ERROR_NO_LIGHTMAPPER);

	BakeStepUD bsud;
	bsud.func = p_bake_step;
	bsud.ud = p_bake_userdata;
	bsud.from_percent = 0.2;
	bsud.to_percent = 0.8;

	if (p_bake_step) {
		p_bake_step(0.0, RTR("Finding meshes, lights and probes"), p_bake_userdata, true);
	}
	/* STEP 1, FIND MESHES, LIGHTS AND PROBES */
	Vector<Lightmapper::MeshData> mesh_data;
	Vector<LightsFound> lights_found;
	Vector<Vector3> probes_found;
	AABB bounds;
	{
		Vector<MeshesFound> meshes_found;
		_find_meshes_and_lights(p_from_node ? p_from_node : get_parent(), meshes_found, lights_found, probes_found);

		if (meshes_found.is_empty()) {
			return BAKE_ERROR_NO_MESHES;
		}
		// create mesh data for insert

		//get the base material textures, help compute atlas size and bounds
		for (int m_i = 0; m_i < meshes_found.size(); m_i++) {
			if (p_bake_step) {
				float p = (float)(m_i) / meshes_found.size();
				p_bake_step(p * 0.1, vformat(RTR("Preparing geometry %d/%d"), m_i, meshes_found.size()), p_bake_userdata, false);
			}

			MeshesFound &mf = meshes_found.write[m_i];

			Size2i mesh_lightmap_size = mf.mesh->get_lightmap_size_hint();
			if (mesh_lightmap_size == Size2i(0, 0)) {
				/// @todo We should compute a size if no lightmap hint is set, as we did in 3.x.
				/// For now set to basic size to avoid crash.
				mesh_lightmap_size = Size2i(64, 64);
			}
			// Double lightmap texel density if downsampling is enabled, as the final texture size will be halved before saving lightmaps.
			Size2i lightmap_size = Size2i(Size2(mesh_lightmap_size) * mf.lightmap_scale * texel_scale) * (supersampling_enabled ? supersampling_factor : 1.0);
			ERR_FAIL_COND_V(lightmap_size.x == 0 || lightmap_size.y == 0, BAKE_ERROR_LIGHTMAP_TOO_SMALL);

			TypedArray<RID> overrides;