6 #include <gmath/gmath.h>
7 #include <assimp/cimport.h>
8 #include <assimp/postprocess.h>
9 #include <assimp/scene.h>
10 #include <assimp/mesh.h>
11 #include <assimp/material.h>
12 #include <assimp/anim.h>
13 #include <assimp/vector3.h>
14 #include <assimp/matrix4x4.h>
15 #include <assimp/quaternion.h>
20 #include "metascene.h"
22 static bool load_material(Scene *scn, Material *mat, const aiMaterial *aimat);
23 static SceneNode *load_node(Scene *scn, const aiScene *aiscn, unsigned int flags, const aiNode *ainode);
24 static Mesh *load_mesh(Scene *scn, const aiScene *aiscn, unsigned int flags, const aiMesh *aimesh);
25 /*static const char *mprop_semantic(int x);
26 static int count_textures(const aiMaterial *aimat);*/
27 static int assimp_textype(aiTextureType type);
28 static const char *assimp_textypestr(aiTextureType type);
30 static Mat4 assimp_matrix(const aiMatrix4x4 &aim);
32 /*static Vec3 assimp_vector(const aiVector3D &v);
33 static Quat assimp_quat(const aiQuaternion &q);
34 static long assimp_time(const aiAnimation *anim, double aitime);
35 static void print_hierarchy(const aiNode *node);
41 std::map<std::string, SceneNode*> node_by_name;
42 std::map<aiMesh*, Mesh*> mesh_by_aimesh;
45 #define LD_STAGE_MASK 0xf000
47 bool Scene::load(const char *fname, unsigned int flags)
49 if((flags & LD_STAGE_MASK) == 0) {
50 // not passing either of the stage specifiers, means do the whole job
51 flags |= LD_STAGE_MASK;
54 // first perform I/O and all operations not requiring access to an OpenGL context
55 if(flags & SCNLOAD_STAGE_IO) {
56 unsigned int ppflags = aiProcess_CalcTangentSpace |
57 aiProcess_GenNormals |
58 aiProcess_JoinIdenticalVertices |
59 aiProcess_Triangulate |
60 aiProcess_SortByPType |
61 aiProcess_GenUVCoords |
62 //aiProcess_PreTransformVertices |
63 aiProcess_TransformUVCoords;
65 if(flags & SCNLOAD_FLIPTEX) {
66 ppflags |= aiProcess_FlipUVs;
69 info_log("Loading scene file: %s\n", fname);
71 const aiScene *aiscn = aiImportFile(fname, ppflags);
73 error_log("failed to load scene file: %s\n", fname);
77 // assimp adds its own root node, which might have transformations
78 Vec3 root_pos, root_scaling(1.0, 1.0, 1.0);
81 if(aiscn->mRootNode) {
82 Mat4 root_matrix = assimp_matrix(aiscn->mRootNode->mTransformation);
83 root_pos = root_matrix.get_translation();
84 root_rot = root_matrix.get_rotation();
85 root_scaling = root_matrix.get_scaling();
89 nodes = new SceneNode;
91 nodes->set_name("root");
92 nodes->set_position(root_pos);
93 nodes->set_rotation(root_rot);
94 nodes->set_scaling(root_scaling);
97 LoaderData *ldata = new LoaderData;
99 ldata->fname = std::string(fname);
100 loader_data = (void*)ldata;
103 /* then, assuming we have successfully loaded everything, proceed to construct
104 * all the engine objects, which require access to the OpenGL context
106 if(flags & SCNLOAD_STAGE_GL) {
108 error_log("second stage scene loader failed to find valid I/O data\n");
112 LoaderData *ldata = (LoaderData*)loader_data;
113 const aiScene *aiscn = ldata->aiscn;
114 fname = ldata->fname.c_str();
117 for(unsigned int i=0; i<aiscn->mNumMeshes; i++) {
118 aiMesh *aimesh = aiscn->mMeshes[i];
121 switch(aimesh->mPrimitiveTypes) {
122 case aiPrimitiveType_TRIANGLE:
123 if((mesh = load_mesh(this, aiscn, flags, aimesh))) {
124 ldata->mesh_by_aimesh[aimesh] = mesh;
125 meshes.push_back(mesh);
130 error_log("unsupported primitive type: %u\n", aimesh->mPrimitiveTypes);
135 // load all the nodes recursively
136 for(unsigned int i=0; i<aiscn->mRootNode->mNumChildren; i++) {
137 SceneNode *node = load_node(this, aiscn, flags, aiscn->mRootNode->mChildren[i]);
139 nodes->add_child(node);
143 info_log("loaded scene file: %s, %d meshes\n", fname, (int)meshes.size());
145 aiReleaseImport(aiscn);
153 static bool load_material(Scene *scn, Material *mat, const aiMaterial *aimat)
157 float shin, shin_str;
159 if(aiGetMaterialString(aimat, AI_MATKEY_NAME, &name) == 0) {
160 mat->name = name.data;
162 mat->name = "unknown";
164 //info_log("load_material: %s\n", mat->name.c_str());
166 if(aiGetMaterialColor(aimat, AI_MATKEY_COLOR_DIFFUSE, &aicol) == 0) {
167 mat->diffuse = Vec3(aicol[0], aicol[1], aicol[2]);
169 if(aiGetMaterialColor(aimat, AI_MATKEY_COLOR_SPECULAR, &aicol) == 0) {
170 mat->specular = Vec3(aicol[0], aicol[1], aicol[2]);
173 unsigned int count = 1;
174 if(aiGetMaterialFloatArray(aimat, AI_MATKEY_SHININESS_STRENGTH, &shin_str, &count) != 0) {
177 if(aiGetMaterialFloatArray(aimat, AI_MATKEY_SHININESS, &shin, &count) == 0) {
178 // XXX can't remember how I came up with this...
179 mat->shininess = shin * shin_str * 0.0001 * 128.0;
184 const int num_tex_types = aiTextureType_UNKNOWN + 1;
185 for(int i=0; i<num_tex_types; i++) {
186 aiTextureType aitype = (aiTextureType)i;
187 int count = aiGetMaterialTextureCount(aimat, aitype);
189 for(int j=0; j<count; j++) {
191 if(aiGetMaterialTexture(aimat, aitype, j, &aipath) != 0) {
195 char *fname = (char*)alloca(strlen(aipath.data) + 1);
197 char *sptr = aipath.data;
199 *dptr++ = *sptr == '\\' ? '/' : *sptr;
202 int textype = assimp_textype(aitype);
203 info_log("loading %s texture: %s\n", assimp_textypestr(aitype), fname);
205 Texture *tex = scn->texset->get_texture(fname, TEX_2D, &scn->datamap);
207 mat->textures.push_back(tex);
209 if(textype != MTL_TEX_UNKNOWN && !mat->stdtex[textype]) {
210 mat->stdtex[textype] = tex;
218 static SceneNode *load_node(Scene *scn, const aiScene *aiscn, unsigned int flags, const aiNode *ainode)
220 LoaderData *ldata = (LoaderData*)scn->loader_data;
222 SceneNode *node = new SceneNode;
223 node->set_name(ainode->mName.data);
226 Mat4 matrix = assimp_matrix(ainode->mTransformation);
227 Vec3 pos = matrix.get_translation();
228 Quat rot = matrix.get_rotation();
229 Vec3 scale = matrix.get_scaling();
231 node->set_position(pos);
232 node->set_rotation(rot);
233 node->set_scaling(scale);
234 node->dbg_xform = matrix;
237 for(unsigned int i=0; i<ainode->mNumMeshes; i++) {
238 aiMesh *aimesh = aiscn->mMeshes[ainode->mMeshes[i]];
240 Mesh *mesh = ldata->mesh_by_aimesh[aimesh];
242 ObjMesh *obj = new ObjMesh;
243 obj->set_name(mesh->get_name());
245 // also grab the material of this mesh
246 load_material(scn, &obj->mtl, aiscn->mMaterials[aimesh->mMaterialIndex]);
248 node->add_object(obj);
249 scn->objects.push_back(obj);
253 /* recurse to all children */
254 for(unsigned int i=0; i<ainode->mNumChildren; i++) {
255 SceneNode *child = load_node(scn, aiscn, flags, ainode->mChildren[i]);
257 node->add_child(child);
261 ldata->node_by_name[node->get_name()] = node;
265 static Mesh *load_mesh(Scene *scn, const aiScene *aiscn, unsigned int flags, const aiMesh *aimesh)
267 Mesh *mesh = new Mesh;
268 mesh->set_name(aimesh->mName.data);
270 int num_verts = aimesh->mNumVertices;
271 int num_faces = aimesh->mNumFaces;
273 mesh->set_attrib_data(MESH_ATTR_VERTEX, 3, num_verts, (float*)aimesh->mVertices);
275 if(aimesh->mNormals) {
276 mesh->set_attrib_data(MESH_ATTR_NORMAL, 3, num_verts, (float*)aimesh->mNormals);
278 if(aimesh->mTangents) {
279 mesh->set_attrib_data(MESH_ATTR_TANGENT, 3, num_verts, (float*)aimesh->mTangents);
281 if(aimesh->mTextureCoords[0]) {
282 mesh->set_attrib_data(MESH_ATTR_TEXCOORD, 3, num_verts, (float*)aimesh->mTextureCoords[0]);
284 if(aimesh->mTextureCoords[1]) {
285 mesh->set_attrib_data(MESH_ATTR_TEXCOORD2, 3, num_verts, (float*)aimesh->mTextureCoords[1]);
288 if(flags & SCNLOAD_FLIPYZ) {
289 Vec3 *vptr = (Vec3*)mesh->get_attrib_data(MESH_ATTR_VERTEX);
290 for(int i=0; i<num_verts; i++) {
295 Vec3 *nptr = (Vec3*)mesh->get_attrib_data(MESH_ATTR_NORMAL);
296 for(int i=0; i<num_verts; i++) {
301 Vec3 *tptr = (Vec3*)mesh->get_attrib_data(MESH_ATTR_TANGENT);
302 for(int i=0; i<num_verts; i++) {
308 unsigned int *iptr = mesh->set_index_data(num_faces * 3);
309 for(int i=0; i<num_faces; i++) {
310 iptr[0] = aimesh->mFaces[i].mIndices[0];
311 iptr[1] = aimesh->mFaces[i].mIndices[flags & SCNLOAD_FLIPYZ ? 2 : 1];
312 iptr[2] = aimesh->mFaces[i].mIndices[flags & SCNLOAD_FLIPYZ ? 1 : 2];
318 static int assimp_textype(aiTextureType type)
321 case aiTextureType_DIFFUSE:
322 return MTL_TEX_DIFFUSE;
323 case aiTextureType_SPECULAR:
324 return MTL_TEX_SPECULAR;
325 case aiTextureType_NORMALS:
326 return MTL_TEX_NORMALMAP;
327 case aiTextureType_LIGHTMAP:
328 case aiTextureType_EMISSIVE:
329 return MTL_TEX_LIGHTMAP;
330 case aiTextureType_REFLECTION:
331 return MTL_TEX_ENVMAP;
335 return MTL_TEX_UNKNOWN;
338 static const char *assimp_textypestr(aiTextureType type)
341 case aiTextureType_DIFFUSE:
343 case aiTextureType_SPECULAR:
345 case aiTextureType_NORMALS:
347 case aiTextureType_LIGHTMAP:
348 case aiTextureType_EMISSIVE:
350 case aiTextureType_REFLECTION:
358 static Mat4 assimp_matrix(const aiMatrix4x4 &aim)
361 memcpy(m[0], &aim, 16 * sizeof(float));
369 : DataSet<Scene*>(create_scene, load_scene, done_scene, free_scene)
373 Scene *SceneSet::create_scene()
378 bool SceneSet::load_scene(Scene *scn, const char *fname)
380 return scn->load(fname, SCNLOAD_FLIPTEX | SCNLOAD_STAGE_IO);
383 bool SceneSet::done_scene(Scene *scn)
385 bool res = scn->load(0, SCNLOAD_STAGE_GL);
387 scn->metascn->scene_loaded(scn);
392 void SceneSet::free_scene(Scene *scn)