0442a65656
This commit updates the obj importer to properly name imported meshes and permits it to skip meshes that do not contain geometry. This fixes at least one crash and several warnings and avoids unnecessary meshes being generated when importing obj files that do not contain geometry that is not assigned to a named object (such as when exporting from Blender).
558 lines
18 KiB
C++
558 lines
18 KiB
C++
/**************************************************************************/
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/* resource_importer_obj.cpp */
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/**************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/**************************************************************************/
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/**************************************************************************/
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#include "resource_importer_obj.h"
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#include "core/io/file_access.h"
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#include "core/io/resource_saver.h"
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#include "scene/3d/importer_mesh_instance_3d.h"
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#include "scene/3d/mesh_instance_3d.h"
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#include "scene/3d/node_3d.h"
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#include "scene/resources/importer_mesh.h"
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#include "scene/resources/mesh.h"
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#include "scene/resources/surface_tool.h"
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uint32_t EditorOBJImporter::get_import_flags() const {
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return IMPORT_SCENE;
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}
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static Error _parse_material_library(const String &p_path, HashMap<String, Ref<StandardMaterial3D>> &material_map, List<String> *r_missing_deps) {
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Ref<FileAccess> f = FileAccess::open(p_path, FileAccess::READ);
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ERR_FAIL_COND_V_MSG(f.is_null(), ERR_CANT_OPEN, vformat("Couldn't open MTL file '%s', it may not exist or not be readable.", p_path));
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Ref<StandardMaterial3D> current;
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String current_name;
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String base_path = p_path.get_base_dir();
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while (true) {
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String l = f->get_line().strip_edges();
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if (l.begins_with("newmtl ")) {
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//vertex
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current_name = l.replace("newmtl", "").strip_edges();
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current.instantiate();
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current->set_name(current_name);
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material_map[current_name] = current;
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} else if (l.begins_with("Ka ")) {
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//uv
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WARN_PRINT("OBJ: Ambient light for material '" + current_name + "' is ignored in PBR");
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} else if (l.begins_with("Kd ")) {
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//normal
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ERR_FAIL_COND_V(current.is_null(), ERR_FILE_CORRUPT);
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Vector<String> v = l.split(" ", false);
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ERR_FAIL_COND_V(v.size() < 4, ERR_INVALID_DATA);
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Color c = current->get_albedo();
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c.r = v[1].to_float();
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c.g = v[2].to_float();
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c.b = v[3].to_float();
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current->set_albedo(c);
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} else if (l.begins_with("Ks ")) {
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//normal
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ERR_FAIL_COND_V(current.is_null(), ERR_FILE_CORRUPT);
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Vector<String> v = l.split(" ", false);
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ERR_FAIL_COND_V(v.size() < 4, ERR_INVALID_DATA);
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float r = v[1].to_float();
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float g = v[2].to_float();
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float b = v[3].to_float();
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float metalness = MAX(r, MAX(g, b));
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current->set_metallic(metalness);
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} else if (l.begins_with("Ns ")) {
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//normal
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ERR_FAIL_COND_V(current.is_null(), ERR_FILE_CORRUPT);
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Vector<String> v = l.split(" ", false);
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ERR_FAIL_COND_V(v.size() != 2, ERR_INVALID_DATA);
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float s = v[1].to_float();
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current->set_metallic((1000.0 - s) / 1000.0);
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} else if (l.begins_with("d ")) {
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//normal
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ERR_FAIL_COND_V(current.is_null(), ERR_FILE_CORRUPT);
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Vector<String> v = l.split(" ", false);
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ERR_FAIL_COND_V(v.size() != 2, ERR_INVALID_DATA);
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float d = v[1].to_float();
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Color c = current->get_albedo();
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c.a = d;
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current->set_albedo(c);
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if (c.a < 0.99) {
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current->set_transparency(StandardMaterial3D::TRANSPARENCY_ALPHA);
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}
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} else if (l.begins_with("Tr ")) {
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//normal
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ERR_FAIL_COND_V(current.is_null(), ERR_FILE_CORRUPT);
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Vector<String> v = l.split(" ", false);
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ERR_FAIL_COND_V(v.size() != 2, ERR_INVALID_DATA);
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float d = v[1].to_float();
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Color c = current->get_albedo();
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c.a = 1.0 - d;
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current->set_albedo(c);
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if (c.a < 0.99) {
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current->set_transparency(StandardMaterial3D::TRANSPARENCY_ALPHA);
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}
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} else if (l.begins_with("map_Ka ")) {
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//uv
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WARN_PRINT("OBJ: Ambient light texture for material '" + current_name + "' is ignored in PBR");
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} else if (l.begins_with("map_Kd ")) {
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//normal
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ERR_FAIL_COND_V(current.is_null(), ERR_FILE_CORRUPT);
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String p = l.replace("map_Kd", "").replace("\\", "/").strip_edges();
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String path;
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if (p.is_absolute_path()) {
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path = p;
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} else {
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path = base_path.path_join(p);
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}
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Ref<Texture2D> texture = ResourceLoader::load(path);
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if (texture.is_valid()) {
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current->set_texture(StandardMaterial3D::TEXTURE_ALBEDO, texture);
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} else if (r_missing_deps) {
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r_missing_deps->push_back(path);
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}
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} else if (l.begins_with("map_Ks ")) {
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//normal
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ERR_FAIL_COND_V(current.is_null(), ERR_FILE_CORRUPT);
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String p = l.replace("map_Ks", "").replace("\\", "/").strip_edges();
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String path;
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if (p.is_absolute_path()) {
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path = p;
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} else {
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path = base_path.path_join(p);
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}
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Ref<Texture2D> texture = ResourceLoader::load(path);
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if (texture.is_valid()) {
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current->set_texture(StandardMaterial3D::TEXTURE_METALLIC, texture);
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} else if (r_missing_deps) {
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r_missing_deps->push_back(path);
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}
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} else if (l.begins_with("map_Ns ")) {
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//normal
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ERR_FAIL_COND_V(current.is_null(), ERR_FILE_CORRUPT);
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String p = l.replace("map_Ns", "").replace("\\", "/").strip_edges();
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String path;
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if (p.is_absolute_path()) {
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path = p;
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} else {
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path = base_path.path_join(p);
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}
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Ref<Texture2D> texture = ResourceLoader::load(path);
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if (texture.is_valid()) {
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current->set_texture(StandardMaterial3D::TEXTURE_ROUGHNESS, texture);
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} else if (r_missing_deps) {
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r_missing_deps->push_back(path);
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}
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} else if (l.begins_with("map_bump ")) {
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//normal
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ERR_FAIL_COND_V(current.is_null(), ERR_FILE_CORRUPT);
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String p = l.replace("map_bump", "").replace("\\", "/").strip_edges();
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String path = base_path.path_join(p);
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Ref<Texture2D> texture = ResourceLoader::load(path);
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if (texture.is_valid()) {
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current->set_feature(StandardMaterial3D::FEATURE_NORMAL_MAPPING, true);
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current->set_texture(StandardMaterial3D::TEXTURE_NORMAL, texture);
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} else if (r_missing_deps) {
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r_missing_deps->push_back(path);
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}
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} else if (f->eof_reached()) {
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break;
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}
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}
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return OK;
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}
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static Error _parse_obj(const String &p_path, List<Ref<Mesh>> &r_meshes, bool p_single_mesh, bool p_generate_tangents, bool p_optimize, Vector3 p_scale_mesh, Vector3 p_offset_mesh, List<String> *r_missing_deps) {
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Ref<FileAccess> f = FileAccess::open(p_path, FileAccess::READ);
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ERR_FAIL_COND_V_MSG(f.is_null(), ERR_CANT_OPEN, vformat("Couldn't open OBJ file '%s', it may not exist or not be readable.", p_path));
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Ref<ArrayMesh> mesh;
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mesh.instantiate();
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bool generate_tangents = p_generate_tangents;
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Vector3 scale_mesh = p_scale_mesh;
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Vector3 offset_mesh = p_offset_mesh;
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int mesh_flags = 0;
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Vector<Vector3> vertices;
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Vector<Vector3> normals;
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Vector<Vector2> uvs;
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Vector<Color> colors;
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const String default_name = "Mesh";
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String name = default_name;
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HashMap<String, HashMap<String, Ref<StandardMaterial3D>>> material_map;
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Ref<SurfaceTool> surf_tool = memnew(SurfaceTool);
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surf_tool->begin(Mesh::PRIMITIVE_TRIANGLES);
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String current_material_library;
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String current_material;
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String current_group;
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uint32_t smooth_group = 0;
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bool smoothing = true;
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while (true) {
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String l = f->get_line().strip_edges();
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while (l.length() && l[l.length() - 1] == '\\') {
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String add = f->get_line().strip_edges();
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l += add;
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if (add.is_empty()) {
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break;
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}
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}
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if (l.begins_with("v ")) {
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//vertex
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Vector<String> v = l.split(" ", false);
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ERR_FAIL_COND_V(v.size() < 4, ERR_FILE_CORRUPT);
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Vector3 vtx;
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vtx.x = v[1].to_float() * scale_mesh.x + offset_mesh.x;
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vtx.y = v[2].to_float() * scale_mesh.y + offset_mesh.y;
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vtx.z = v[3].to_float() * scale_mesh.z + offset_mesh.z;
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vertices.push_back(vtx);
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//vertex color
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if (v.size() == 7) {
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while (colors.size() < vertices.size() - 1) {
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colors.push_back(Color(1.0, 1.0, 1.0));
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}
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Color c;
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c.r = v[4].to_float();
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c.g = v[5].to_float();
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c.b = v[6].to_float();
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colors.push_back(c);
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} else if (!colors.is_empty()) {
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colors.push_back(Color(1.0, 1.0, 1.0));
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}
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} else if (l.begins_with("vt ")) {
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//uv
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Vector<String> v = l.split(" ", false);
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ERR_FAIL_COND_V(v.size() < 3, ERR_FILE_CORRUPT);
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Vector2 uv;
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uv.x = v[1].to_float();
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uv.y = 1.0 - v[2].to_float();
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uvs.push_back(uv);
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} else if (l.begins_with("vn ")) {
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//normal
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Vector<String> v = l.split(" ", false);
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ERR_FAIL_COND_V(v.size() < 4, ERR_FILE_CORRUPT);
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Vector3 nrm;
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nrm.x = v[1].to_float();
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nrm.y = v[2].to_float();
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nrm.z = v[3].to_float();
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normals.push_back(nrm);
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} else if (l.begins_with("f ")) {
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//vertex
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Vector<String> v = l.split(" ", false);
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ERR_FAIL_COND_V(v.size() < 4, ERR_FILE_CORRUPT);
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//not very fast, could be sped up
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Vector<String> face[3];
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face[0] = v[1].split("/");
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face[1] = v[2].split("/");
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ERR_FAIL_COND_V(face[0].size() == 0, ERR_FILE_CORRUPT);
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ERR_FAIL_COND_V(face[0].size() != face[1].size(), ERR_FILE_CORRUPT);
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for (int i = 2; i < v.size() - 1; i++) {
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face[2] = v[i + 1].split("/");
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ERR_FAIL_COND_V(face[0].size() != face[2].size(), ERR_FILE_CORRUPT);
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for (int j = 0; j < 3; j++) {
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int idx = j;
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if (idx < 2) {
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idx = 1 ^ idx;
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}
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if (face[idx].size() == 3) {
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int norm = face[idx][2].to_int() - 1;
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if (norm < 0) {
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norm += normals.size() + 1;
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}
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ERR_FAIL_INDEX_V(norm, normals.size(), ERR_FILE_CORRUPT);
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surf_tool->set_normal(normals[norm]);
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}
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if (face[idx].size() >= 2 && !face[idx][1].is_empty()) {
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int uv = face[idx][1].to_int() - 1;
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if (uv < 0) {
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uv += uvs.size() + 1;
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}
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ERR_FAIL_INDEX_V(uv, uvs.size(), ERR_FILE_CORRUPT);
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surf_tool->set_uv(uvs[uv]);
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}
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int vtx = face[idx][0].to_int() - 1;
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if (vtx < 0) {
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vtx += vertices.size() + 1;
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}
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ERR_FAIL_INDEX_V(vtx, vertices.size(), ERR_FILE_CORRUPT);
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Vector3 vertex = vertices[vtx];
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if (!colors.is_empty()) {
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surf_tool->set_color(colors[vtx]);
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}
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if (!smoothing) {
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smooth_group++;
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}
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surf_tool->set_smooth_group(smooth_group);
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surf_tool->add_vertex(vertex);
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}
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face[1] = face[2];
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}
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} else if (l.begins_with("s ")) { //smoothing
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String what = l.substr(2, l.length()).strip_edges();
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bool do_smooth;
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if (what == "off") {
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do_smooth = false;
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} else {
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do_smooth = true;
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}
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if (do_smooth != smoothing) {
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smooth_group++;
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smoothing = do_smooth;
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}
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} else if (/*l.begins_with("g ") ||*/ l.begins_with("usemtl ") || (l.begins_with("o ") || f->eof_reached())) { //commit group to mesh
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//groups are too annoying
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if (surf_tool->get_vertex_array().size()) {
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//another group going on, commit it
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if (normals.size() == 0) {
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surf_tool->generate_normals();
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}
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if (generate_tangents && uvs.size()) {
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surf_tool->generate_tangents();
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}
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surf_tool->index();
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print_verbose("OBJ: Current material library " + current_material_library + " has " + itos(material_map.has(current_material_library)));
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print_verbose("OBJ: Current material " + current_material + " has " + itos(material_map.has(current_material_library) && material_map[current_material_library].has(current_material)));
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if (material_map.has(current_material_library) && material_map[current_material_library].has(current_material)) {
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Ref<StandardMaterial3D> &material = material_map[current_material_library][current_material];
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if (!colors.is_empty()) {
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material->set_flag(StandardMaterial3D::FLAG_SRGB_VERTEX_COLOR, true);
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}
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surf_tool->set_material(material);
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}
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mesh = surf_tool->commit(mesh, mesh_flags);
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if (!current_material.is_empty()) {
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mesh->surface_set_name(mesh->get_surface_count() - 1, current_material.get_basename());
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} else if (!current_group.is_empty()) {
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mesh->surface_set_name(mesh->get_surface_count() - 1, current_group);
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}
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print_verbose("OBJ: Added surface :" + mesh->surface_get_name(mesh->get_surface_count() - 1));
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surf_tool->clear();
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surf_tool->begin(Mesh::PRIMITIVE_TRIANGLES);
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}
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if (l.begins_with("o ") || f->eof_reached()) {
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if (!p_single_mesh) {
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if (mesh->get_surface_count() > 0) {
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mesh->set_name(name);
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r_meshes.push_back(mesh);
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mesh.instantiate();
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}
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name = default_name;
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current_group = "";
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current_material = "";
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}
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}
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if (f->eof_reached()) {
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break;
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}
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if (l.begins_with("o ")) {
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name = l.substr(2, l.length()).strip_edges();
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}
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if (l.begins_with("usemtl ")) {
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current_material = l.replace("usemtl", "").strip_edges();
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}
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if (l.begins_with("g ")) {
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current_group = l.substr(2, l.length()).strip_edges();
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}
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} else if (l.begins_with("mtllib ")) { //parse material
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current_material_library = l.replace("mtllib", "").strip_edges();
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if (!material_map.has(current_material_library)) {
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HashMap<String, Ref<StandardMaterial3D>> lib;
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String lib_path = current_material_library;
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if (lib_path.is_relative_path()) {
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lib_path = p_path.get_base_dir().path_join(current_material_library);
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}
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Error err = _parse_material_library(lib_path, lib, r_missing_deps);
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if (err == OK) {
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material_map[current_material_library] = lib;
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}
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}
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}
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}
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if (p_single_mesh) {
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r_meshes.push_back(mesh);
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}
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return OK;
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}
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Node *EditorOBJImporter::import_scene(const String &p_path, uint32_t p_flags, const HashMap<StringName, Variant> &p_options, List<String> *r_missing_deps, Error *r_err) {
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List<Ref<Mesh>> meshes;
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Error err = _parse_obj(p_path, meshes, false, p_flags & IMPORT_GENERATE_TANGENT_ARRAYS, false, Vector3(1, 1, 1), Vector3(0, 0, 0), r_missing_deps);
|
|
|
|
if (err != OK) {
|
|
if (r_err) {
|
|
*r_err = err;
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
Node3D *scene = memnew(Node3D);
|
|
|
|
for (const Ref<Mesh> &m : meshes) {
|
|
Ref<ImporterMesh> mesh;
|
|
mesh.instantiate();
|
|
mesh->set_name(m->get_name());
|
|
for (int i = 0; i < m->get_surface_count(); i++) {
|
|
mesh->add_surface(m->surface_get_primitive_type(i), m->surface_get_arrays(i), Array(), Dictionary(), m->surface_get_material(i));
|
|
}
|
|
|
|
ImporterMeshInstance3D *mi = memnew(ImporterMeshInstance3D);
|
|
mi->set_mesh(mesh);
|
|
mi->set_name(m->get_name());
|
|
scene->add_child(mi, true);
|
|
mi->set_owner(scene);
|
|
}
|
|
|
|
if (r_err) {
|
|
*r_err = OK;
|
|
}
|
|
|
|
return scene;
|
|
}
|
|
|
|
void EditorOBJImporter::get_extensions(List<String> *r_extensions) const {
|
|
r_extensions->push_back("obj");
|
|
}
|
|
|
|
EditorOBJImporter::EditorOBJImporter() {
|
|
}
|
|
|
|
////////////////////////////////////////////////////
|
|
|
|
String ResourceImporterOBJ::get_importer_name() const {
|
|
return "wavefront_obj";
|
|
}
|
|
|
|
String ResourceImporterOBJ::get_visible_name() const {
|
|
return "OBJ As Mesh";
|
|
}
|
|
|
|
void ResourceImporterOBJ::get_recognized_extensions(List<String> *p_extensions) const {
|
|
p_extensions->push_back("obj");
|
|
}
|
|
|
|
String ResourceImporterOBJ::get_save_extension() const {
|
|
return "mesh";
|
|
}
|
|
|
|
String ResourceImporterOBJ::get_resource_type() const {
|
|
return "Mesh";
|
|
}
|
|
|
|
int ResourceImporterOBJ::get_format_version() const {
|
|
return 1;
|
|
}
|
|
|
|
int ResourceImporterOBJ::get_preset_count() const {
|
|
return 0;
|
|
}
|
|
|
|
String ResourceImporterOBJ::get_preset_name(int p_idx) const {
|
|
return "";
|
|
}
|
|
|
|
void ResourceImporterOBJ::get_import_options(const String &p_path, List<ImportOption> *r_options, int p_preset) const {
|
|
r_options->push_back(ImportOption(PropertyInfo(Variant::BOOL, "generate_tangents"), true));
|
|
r_options->push_back(ImportOption(PropertyInfo(Variant::VECTOR3, "scale_mesh"), Vector3(1, 1, 1)));
|
|
r_options->push_back(ImportOption(PropertyInfo(Variant::VECTOR3, "offset_mesh"), Vector3(0, 0, 0)));
|
|
r_options->push_back(ImportOption(PropertyInfo(Variant::BOOL, "optimize_mesh"), true));
|
|
}
|
|
|
|
bool ResourceImporterOBJ::get_option_visibility(const String &p_path, const String &p_option, const HashMap<StringName, Variant> &p_options) const {
|
|
return true;
|
|
}
|
|
|
|
Error ResourceImporterOBJ::import(const String &p_source_file, const String &p_save_path, const HashMap<StringName, Variant> &p_options, List<String> *r_platform_variants, List<String> *r_gen_files, Variant *r_metadata) {
|
|
List<Ref<Mesh>> meshes;
|
|
|
|
Error err = _parse_obj(p_source_file, meshes, true, p_options["generate_tangents"], p_options["optimize_mesh"], p_options["scale_mesh"], p_options["offset_mesh"], nullptr);
|
|
|
|
ERR_FAIL_COND_V(err != OK, err);
|
|
ERR_FAIL_COND_V(meshes.size() != 1, ERR_BUG);
|
|
|
|
String save_path = p_save_path + ".mesh";
|
|
|
|
err = ResourceSaver::save(meshes.front()->get(), save_path);
|
|
|
|
ERR_FAIL_COND_V_MSG(err != OK, err, "Cannot save Mesh to file '" + save_path + "'.");
|
|
|
|
r_gen_files->push_back(save_path);
|
|
|
|
return OK;
|
|
}
|
|
|
|
ResourceImporterOBJ::ResourceImporterOBJ() {
|
|
}
|