428 lines
14 KiB
C++
428 lines
14 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) 2007-2017 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md) */
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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 "io/resource_saver.h"
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#include "os/file_access.h"
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#include "scene/3d/mesh_instance.h"
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#include "scene/3d/spatial.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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void EditorOBJImporter::get_extensions(List<String> *r_extensions) const {
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r_extensions->push_back("obj");
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}
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Error EditorOBJImporter::_parse_material_library(const String &p_path, Map<String, Ref<SpatialMaterial> > &material_map, List<String> *r_missing_deps) {
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FileAccessRef f = FileAccess::open(p_path, FileAccess::READ);
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ERR_FAIL_COND_V(!f, ERR_CANT_OPEN);
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Ref<SpatialMaterial> 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.instance();
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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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print_line("Warning: 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_feature(SpatialMaterial::FEATURE_TRANSPARENT, true);
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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_feature(SpatialMaterial::FEATURE_TRANSPARENT, true);
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}
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} else if (l.begins_with("map_Ka ")) {
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//uv
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print_line("Warning: 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 = base_path.plus_file(p);
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Ref<Texture> texture = ResourceLoader::load(path);
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if (texture.is_valid()) {
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current->set_texture(SpatialMaterial::TEXTURE_ALBEDO, texture);
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} else {
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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 = base_path.plus_file(p);
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Ref<Texture> texture = ResourceLoader::load(path);
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if (texture.is_valid()) {
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current->set_texture(SpatialMaterial::TEXTURE_METALLIC, texture);
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} else {
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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 = base_path.plus_file(p);
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Ref<Texture> texture = ResourceLoader::load(path);
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if (texture.is_valid()) {
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current->set_texture(SpatialMaterial::TEXTURE_ROUGHNESS, texture);
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} else {
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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.plus_file(p);
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Ref<Texture> texture = ResourceLoader::load(path);
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if (texture.is_valid()) {
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current->set_feature(SpatialMaterial::FEATURE_NORMAL_MAPPING, true);
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current->set_texture(SpatialMaterial::TEXTURE_NORMAL, texture);
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} else {
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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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Node *EditorOBJImporter::import_scene(const String &p_path, uint32_t p_flags, int p_bake_fps, List<String> *r_missing_deps, Error *r_err) {
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FileAccessRef f = FileAccess::open(p_path, FileAccess::READ);
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if (r_err) {
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*r_err = ERR_CANT_OPEN;
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}
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ERR_FAIL_COND_V(!f, NULL);
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if (r_err) {
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*r_err = OK;
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}
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Spatial *scene = memnew(Spatial);
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Ref<ArrayMesh> mesh;
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mesh.instance();
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Map<String, Ref<Material> > name_map;
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bool generate_tangents = p_flags & IMPORT_GENERATE_TANGENT_ARRAYS;
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bool flip_faces = false;
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//bool flip_faces = p_options["force/flip_faces"];
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//bool force_smooth = p_options["force/smooth_shading"];
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//bool weld_vertices = p_options["force/weld_vertices"];
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//float weld_tolerance = p_options["force/weld_tolerance"];
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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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String name;
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Map<String, Map<String, Ref<SpatialMaterial> > > 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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while (true) {
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String l = f->get_line().strip_edges();
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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, NULL);
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Vector3 vtx;
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vtx.x = v[1].to_float();
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vtx.y = v[2].to_float();
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vtx.z = v[3].to_float();
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vertices.push_back(vtx);
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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, NULL);
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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, NULL);
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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, NULL);
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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, NULL);
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ERR_FAIL_COND_V(face[0].size() != face[1].size(), NULL);
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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(), NULL);
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for (int j = 0; j < 3; j++) {
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int idx = j;
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if (!flip_faces && 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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ERR_FAIL_INDEX_V(norm, normals.size(), NULL);
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surf_tool->add_normal(normals[norm]);
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}
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if (face[idx].size() >= 2 && face[idx][1] != String()) {
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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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ERR_FAIL_INDEX_V(uv, uvs.size(), NULL);
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surf_tool->add_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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ERR_FAIL_INDEX_V(vtx, vertices.size(), NULL);
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Vector3 vertex = vertices[vtx];
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//if (weld_vertices)
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// vertex.snap(Vector3(weld_tolerance, weld_tolerance, weld_tolerance));
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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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if (what == "off")
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surf_tool->add_smooth_group(false);
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else
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surf_tool->add_smooth_group(true);
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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_line("current material library " + current_material_library + " has " + itos(material_map.has(current_material_library)));
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print_line("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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surf_tool->set_material(material_map[current_material_library][current_material]);
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}
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mesh = surf_tool->commit(mesh);
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if (current_material != String()) {
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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 != String()) {
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mesh->surface_set_name(mesh->get_surface_count() - 1, current_group);
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}
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print_line("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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MeshInstance *mi = memnew(MeshInstance);
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mi->set_name(name);
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mi->set_mesh(mesh);
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scene->add_child(mi);
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mi->set_owner(scene);
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mesh.instance();
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current_group = "";
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current_material = "";
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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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Map<String, Ref<SpatialMaterial> > lib;
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Error err = _parse_material_library(current_material_library, lib, r_missing_deps);
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if (err == ERR_CANT_OPEN) {
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String dir = p_path.get_base_dir();
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err = _parse_material_library(dir.plus_file(current_material_library), lib, r_missing_deps);
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}
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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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/*
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TODO, check existing materials and merge?
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//re-apply materials if exist
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for(int i=0;i<mesh->get_surface_count();i++) {
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String n = mesh->surface_get_name(i);
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if (name_map.has(n))
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mesh->surface_set_material(i,name_map[n]);
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}
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*/
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return scene;
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}
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Ref<Animation> EditorOBJImporter::import_animation(const String &p_path, uint32_t p_flags) {
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return Ref<Animation>();
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}
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EditorOBJImporter::EditorOBJImporter() {
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}
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