nuclear@13: #include <stdio.h>
nuclear@13: #include "assload.h"
nuclear@13: #include "logger.h"
nuclear@13: 
nuclear@13: #ifdef USE_ASSIMP
nuclear@13: 
nuclear@13: #include <vector>
nuclear@13: #include <map>
nuclear@13: #include "assimp/cimport.h"
nuclear@13: #include "assimp/scene.h"
nuclear@13: #include "assimp/postprocess.h"
nuclear@13: #include "texman.h"
nuclear@13: #include "material.h"
nuclear@13: #include "scene.h"
nuclear@13: 
nuclear@13: using namespace std;
nuclear@13: 
nuclear@13: static bool load_material(Material *mat, const aiMaterial *aimat);
nuclear@13: static Object *load_node(const aiScene *aiscn, const aiNode *ainode);
nuclear@13: static Mesh *load_mesh(const aiScene *aiscn, const aiMesh *aimesh);
nuclear@13: static Curve *load_curve(const aiScene *aiscn, const aiMesh *aimesh);
nuclear@13: static bool load_bones(Mesh *mesh, const aiMesh *aimesh);
nuclear@13: 
nuclear@13: static Vector3 assimp_vector(const aiVector3D &v);
nuclear@13: static Quaternion assimp_quat(const aiQuaternion &q);
nuclear@13: static Matrix4x4 assimp_matrix(const aiMatrix4x4 &aim);
nuclear@13: static long assimp_time(const aiAnimation *anim, double aitime);
nuclear@13: static void print_hierarchy(const aiNode *node);
nuclear@13: 
nuclear@13: static map<string, Object*> obj_by_name;
nuclear@13: static map<aiMesh*, Mesh*> mesh_by_aimesh;
nuclear@13: 
nuclear@13: bool load_ass(Scene *scn, const char *fname)
nuclear@13: {
nuclear@13: 	static bool init_done;
nuclear@13: 
nuclear@13: 	if(!init_done) {
nuclear@13: 		static aiLogStream log_stream = aiGetPredefinedLogStream(aiDefaultLogStream_STDOUT, 0);
nuclear@13: 		aiAttachLogStream(&log_stream);
nuclear@13: 		//aiEnableVerboseLogging(1);
nuclear@13: 		init_done = true;
nuclear@13: 	}
nuclear@13: 
nuclear@13: 	unsigned int proc_flags = aiProcess_JoinIdenticalVertices |
nuclear@13: 		aiProcess_CalcTangentSpace |
nuclear@13: 		aiProcess_Triangulate |
nuclear@13: 		aiProcess_SortByPType |
nuclear@13: 		aiProcess_FlipUVs;
nuclear@13: 
nuclear@13: 	const aiScene *aiscn = aiImportFile(datafile_path(fname).c_str(), proc_flags);
nuclear@13: 	if(!aiscn) {
nuclear@13: 		error_log("failed to load file: %s\n", fname);
nuclear@13: 		return false;
nuclear@13: 	}
nuclear@13: 
nuclear@13: 	info_log("NODE HIERARCHY:\n");
nuclear@13: 	print_hierarchy(aiscn->mRootNode);
nuclear@13: 	info_log("-------------------\n");
nuclear@13: 
nuclear@13: 	Vector3 root_pos, root_scaling(1.0, 1.0, 1.0);
nuclear@13: 	Quaternion root_rot;
nuclear@13: 
nuclear@13: 	if(aiscn->mRootNode) {
nuclear@13: 		Matrix4x4 root_matrix = assimp_matrix(aiscn->mRootNode->mTransformation);
nuclear@13: 		root_pos = root_matrix.get_translation();
nuclear@13: 		root_rot = root_matrix.get_rotation_quat();
nuclear@13: 		root_scaling = root_matrix.get_scaling();
nuclear@13: 	}
nuclear@13: 
nuclear@13: 	// load all meshes
nuclear@13: 	for(unsigned int i=0; i<aiscn->mNumMeshes; i++) {
nuclear@13: 		aiMesh *aimesh = aiscn->mMeshes[i];
nuclear@13: 		Mesh *mesh;
nuclear@13: 		Curve *curve;
nuclear@13: 
nuclear@13: 		switch(aimesh->mPrimitiveTypes) {
nuclear@13: 		case aiPrimitiveType_TRIANGLE:
nuclear@13: 			if((mesh = load_mesh(aiscn, aimesh))) {
nuclear@13: 				mesh_by_aimesh[aimesh] = mesh;
nuclear@13: 				scn->meshes.push_back(mesh);
nuclear@13: 			}
nuclear@13: 			break;
nuclear@13: 
nuclear@13: 		case aiPrimitiveType_LINE:
nuclear@13: 			if((curve = load_curve(aiscn, aimesh))) {
nuclear@13: 				scn->curves.push_back(curve);
nuclear@13: 			}
nuclear@13: 			break;
nuclear@13: 
nuclear@13: 		default:
nuclear@13: 			error_log("unsupported primitive type: %u\n", aimesh->mPrimitiveTypes);
nuclear@13: 			break;
nuclear@13: 		}
nuclear@13: 	}
nuclear@13: 
nuclear@13: 	// load all the nodes recursively
nuclear@13: 	for(unsigned int i=0; i<aiscn->mRootNode->mNumChildren; i++) {
nuclear@13: 		Object *obj = load_node(aiscn, aiscn->mRootNode->mChildren[i]);
nuclear@13: 		if(obj) {
nuclear@13: 			Object *dummy = new Object;
nuclear@13: 			dummy->set_name((string("dummyroot_") + string(obj->get_name())).c_str());
nuclear@13: 			dummy->set_position(root_pos);
nuclear@13: 			dummy->set_rotation(root_rot);
nuclear@13: 			dummy->set_scaling(root_scaling);
nuclear@13: 			dummy->add_child(obj);
nuclear@13: 
nuclear@13: 			obj = dummy;
nuclear@13: 			scn->objects.push_back(obj);
nuclear@13: 		}
nuclear@13: 	}
nuclear@13: 
nuclear@13: 	// load and attach the bones to the meshes
nuclear@13: 	for(unsigned int i=0; i<aiscn->mNumMeshes; i++) {
nuclear@13: 		aiMesh *aimesh = aiscn->mMeshes[i];
nuclear@13: 
nuclear@13: 		Mesh *mesh = mesh_by_aimesh[aimesh];
nuclear@13: 		load_bones(mesh, aimesh);
nuclear@13: 	}
nuclear@13: 
nuclear@13: 	obj_by_name.clear();
nuclear@13: 	mesh_by_aimesh.clear();
nuclear@13: 
nuclear@13: 	aiReleaseImport(aiscn);
nuclear@13: 	return true;
nuclear@13: }
nuclear@13: 
nuclear@13: static bool load_material(Material *mat, const aiMaterial *aimat)
nuclear@13: {
nuclear@13: 	aiColor4D aicol;
nuclear@13: 	float shin, shin_str;
nuclear@13: 
nuclear@13: 	if(aiGetMaterialColor(aimat, AI_MATKEY_COLOR_DIFFUSE, &aicol) == 0) {
nuclear@13: 		mat->diffuse = Vector3(aicol[0], aicol[1], aicol[2]);
nuclear@13: 	}
nuclear@13: 	if(aiGetMaterialColor(aimat, AI_MATKEY_COLOR_SPECULAR, &aicol) == 0) {
nuclear@13: 		mat->specular = Vector3(aicol[0], aicol[1], aicol[2]);
nuclear@13: 	}
nuclear@13: 
nuclear@13: 	unsigned int count = 1;
nuclear@13: 	if(aiGetMaterialFloatArray(aimat, AI_MATKEY_SHININESS_STRENGTH, &shin_str, &count) != 0) {
nuclear@13: 		shin_str = 1.0;
nuclear@13: 	}
nuclear@13: 	if(aiGetMaterialFloatArray(aimat, AI_MATKEY_SHININESS, &shin, &count) == 0) {
nuclear@13: 		// XXX can't remember how I came up with this...
nuclear@13: 		mat->shininess = shin * shin_str * 0.0001 * 128.0;
nuclear@13: 	}
nuclear@13: 
nuclear@13: 	// load textures
nuclear@13: 	struct { int type; aiTextureType aitype; } textypes[] = {
nuclear@13: 		{TEX_DIFFUSE, aiTextureType_DIFFUSE},
nuclear@13: 		{TEX_NORMAL, aiTextureType_NORMALS},
nuclear@13: 		{TEX_SPECULAR, aiTextureType_SPECULAR}
nuclear@13: 	};
nuclear@13: 
nuclear@13: 	for(int i=0; i<sizeof textypes / sizeof *textypes; i++) {
nuclear@13: 		aiString aipath;
nuclear@13: 
nuclear@13: 		if(aiGetMaterialTexture(aimat, textypes[i].aitype, 0, &aipath) == 0) {
nuclear@13: 			char *tmp, *fname = aipath.data;
nuclear@13: 
nuclear@13: 			if((tmp = strrchr(fname, '/'))) {
nuclear@13: 				fname = tmp + 1;
nuclear@13: 			}
nuclear@13: 			if((tmp = strrchr(fname, '\\'))) {
nuclear@13: 				fname = tmp + 1;
nuclear@13: 			}
nuclear@13: 
nuclear@13: 			if(*fname) {
nuclear@13: 				mat->tex[textypes[i].type] = texset.get(fname);
nuclear@13: 			}
nuclear@13: 		}
nuclear@13: 	}
nuclear@13: 
nuclear@13: 	return true;
nuclear@13: }
nuclear@13: 
nuclear@13: static Object *load_node(const aiScene *aiscn, const aiNode *ainode)
nuclear@13: {
nuclear@13: 	Object *obj = new Object;
nuclear@13: 	obj->set_name(ainode->mName.data);
nuclear@13: 
nuclear@13: 	if(ainode->mNumMeshes) {
nuclear@13: 		if(ainode->mNumMeshes > 1) {
nuclear@13: 			info_log("%s warning: node %s has more than one meshes (%u)\n", __FUNCTION__,
nuclear@13: 					ainode->mName.data, ainode->mNumMeshes);
nuclear@13: 		}
nuclear@13: 
nuclear@13: 		aiMesh *aimesh = aiscn->mMeshes[ainode->mMeshes[0]];
nuclear@13: 		obj->set_mesh(mesh_by_aimesh[aimesh]);
nuclear@13: 
nuclear@13: 		// also grab the material of this mesh
nuclear@13: 		load_material(&obj->material, aiscn->mMaterials[aimesh->mMaterialIndex]);
nuclear@13: 	}
nuclear@13: 
nuclear@13: 	// if there are animations, grab the first and try to use it
nuclear@13: 	if(aiscn->mNumAnimations) {
nuclear@13: 		aiAnimation *aianim = aiscn->mAnimations[0];
nuclear@13: 		aiNodeAnim *ainodeanim = 0;
nuclear@13: 		for(unsigned int i=0; i<aianim->mNumChannels; i++) {
nuclear@13: 			if(strcmp(aianim->mChannels[i]->mNodeName.data, ainode->mName.data) == 0) {
nuclear@13: 				ainodeanim = aianim->mChannels[i];
nuclear@13: 				break;
nuclear@13: 			}
nuclear@13: 		}
nuclear@13: 
nuclear@13: 		if(ainodeanim) {
nuclear@13: 			// load all position (translation) keyframes
nuclear@13: 			for(unsigned int i=0; i<ainodeanim->mNumPositionKeys; i++) {
nuclear@13: 				Vector3 pos = assimp_vector(ainodeanim->mPositionKeys[i].mValue);
nuclear@13: 				long msec = assimp_time(aianim, ainodeanim->mPositionKeys[i].mTime);
nuclear@13: 				obj->set_position(pos, msec);
nuclear@13: 			}
nuclear@13: 
nuclear@13: 			// load all rotation keyframes
nuclear@13: 			for(unsigned int i=0; i<ainodeanim->mNumRotationKeys; i++) {
nuclear@13: 				Quaternion rot = assimp_quat(ainodeanim->mRotationKeys[i].mValue);
nuclear@13: 				if(rot.length_sq() < SMALL_NUMBER) {
nuclear@13: 					continue;
nuclear@13: 				}
nuclear@13: 				rot.normalize();
nuclear@13: 				long msec = assimp_time(aianim, ainodeanim->mRotationKeys[i].mTime);
nuclear@13: 				obj->set_rotation(rot, msec);
nuclear@13: 			}
nuclear@13: 
nuclear@13: 			// load all scaling keyframes
nuclear@13: 			for(unsigned int i=0; i<ainodeanim->mNumScalingKeys; i++) {
nuclear@13: 				Vector3 scale = assimp_vector(ainodeanim->mScalingKeys[i].mValue);
nuclear@13: 				long msec = assimp_time(aianim, ainodeanim->mScalingKeys[i].mTime);
nuclear@13: 				obj->set_scaling(scale, msec);
nuclear@13: 			}
nuclear@13: 
nuclear@13: 			obj->set_extrapolator(EXTRAP_REPEAT);	// loop animation
nuclear@13: 		} else {
nuclear@13: 			Matrix4x4 local_matrix = assimp_matrix(ainode->mTransformation);
nuclear@13: 			obj->set_local_matrix(local_matrix);
nuclear@13: 		}
nuclear@13: 	}
nuclear@13: 
nuclear@13: 	/* recurse to all children */
nuclear@13: 	for(unsigned int i=0; i<ainode->mNumChildren; i++) {
nuclear@13: 		Object *child = load_node(aiscn, ainode->mChildren[i]);
nuclear@13: 		if(child) {
nuclear@13: 			obj->add_child(child);
nuclear@13: 		}
nuclear@13: 	}
nuclear@13: 
nuclear@13: 	obj_by_name[obj->get_name()] = obj;
nuclear@13: 	return obj;
nuclear@13: }
nuclear@13: 
nuclear@13: static Mesh *load_mesh(const aiScene *aiscn, const aiMesh *aimesh)
nuclear@13: {
nuclear@13: 	Mesh *mesh = new Mesh;
nuclear@13: 
nuclear@13: 	int num_verts = aimesh->mNumVertices;
nuclear@13: 	int num_faces = aimesh->mNumFaces;
nuclear@13: 
nuclear@13: 	mesh->set_attrib_data(MESH_ATTR_VERTEX, 3, num_verts, (float*)aimesh->mVertices);
nuclear@13: 
nuclear@13: 	if(aimesh->mNormals) {
nuclear@13: 		mesh->set_attrib_data(MESH_ATTR_NORMAL, 3, num_verts, (float*)aimesh->mNormals);
nuclear@13: 	}
nuclear@13: 	if(aimesh->mTangents) {
nuclear@13: 		mesh->set_attrib_data(MESH_ATTR_TANGENT, 3, num_verts, (float*)aimesh->mTangents);
nuclear@13: 	}
nuclear@13: 	if(aimesh->mTextureCoords[0]) {
nuclear@13: 		mesh->set_attrib_data(MESH_ATTR_TEXCOORD, 3, num_verts, (float*)aimesh->mTextureCoords[0]);
nuclear@13: 	}
nuclear@13: 
nuclear@13: 	if(aimesh->mBones) {
nuclear@13: 		float *weights = mesh->set_attrib_data(MESH_ATTR_BONEWEIGHTS, 4, num_verts, 0);
nuclear@13: 		float *boneidx = mesh->set_attrib_data(MESH_ATTR_BONEIDX, 4, num_verts, 0);
nuclear@13: 
nuclear@13: 		memset(weights, 0, num_verts * 4 * sizeof *weights);
nuclear@13: 		memset(boneidx, 0, num_verts * 4 * sizeof *boneidx);
nuclear@13: 
nuclear@13: 		int *vertex_bone_count = new int[num_verts];
nuclear@13: 		memset(vertex_bone_count, 0, num_verts * sizeof *vertex_bone_count);
nuclear@13: 
nuclear@13: 		for(unsigned int i=0; i<aimesh->mNumBones; i++) {
nuclear@13: 			aiBone *aibone = aimesh->mBones[i];
nuclear@13: 
nuclear@13: 			// for every vertex affected by this bone:
nuclear@13: 			for(unsigned int j=0; j<aibone->mNumWeights; j++) {
nuclear@13: 				aiVertexWeight *aiweight = aibone->mWeights + j;
nuclear@13: 				int vidx = aiweight->mVertexId;
nuclear@13: 				int vert_boneidx = vertex_bone_count[vidx];
nuclear@13: 				if(vert_boneidx >= 4) {
nuclear@13: 					error_log("WARNING vertex with more than 4 bones found\n");
nuclear@13: 					continue;
nuclear@13: 				}
nuclear@13: 
nuclear@13: 				weights[vidx * 4 + vert_boneidx] = aiweight->mWeight;
nuclear@13: 				boneidx[vidx * 4 + vert_boneidx] = (float)i;
nuclear@13: 				vertex_bone_count[vidx]++;
nuclear@13: 			}
nuclear@13: 		}
nuclear@13: 
nuclear@13: 		delete [] vertex_bone_count;
nuclear@13: 
nuclear@13: 		// normalize weights
nuclear@13: 		for(int i=0; i<num_verts; i++) {
nuclear@13: 
nuclear@13: 			float wsum = 0.0f;
nuclear@13: 
nuclear@13: 			for(int j=0; j<4; j++) {
nuclear@13: 				wsum += weights[i * 4 + j];
nuclear@13: 			}
nuclear@13: 
nuclear@13: 			if(1.0 - wsum > 1e-4) {
nuclear@13: 				error_log("WARNING vertex with weights < 1 (%f), normalizing...\n", wsum);
nuclear@13: 
nuclear@13: 				if(wsum < 1e-6) {
nuclear@13: 					// this is clearly broken, let's use the first bone in full
nuclear@13: 					weights[i * 4] = 1.0;
nuclear@13: 				} else {
nuclear@13: 					weights[i * 4] /= wsum;
nuclear@13: 					weights[i * 4 + 1] /= wsum;
nuclear@13: 					weights[i * 4 + 2] /= wsum;
nuclear@13: 					weights[i * 4 + 3] /= wsum;
nuclear@13: 				}
nuclear@13: 			}
nuclear@13: 		}
nuclear@13: 	}
nuclear@13: 
nuclear@13: 	unsigned int *iptr = mesh->set_index_data(num_faces * 3);
nuclear@13: 	for(int i=0; i<num_faces; i++) {
nuclear@13: 		for(int j=0; j<3; j++) {
nuclear@13: 			*iptr++ = aimesh->mFaces[i].mIndices[j];
nuclear@13: 		}
nuclear@13: 	}
nuclear@13: 
nuclear@13: 	return mesh;
nuclear@13: }
nuclear@13: 
nuclear@13: static Curve *load_curve(const aiScene *aiscn, const aiMesh *aimesh)
nuclear@13: {
nuclear@13: 	Curve *curve = new Curve;
nuclear@13: 
nuclear@13: 	for(unsigned int i=0; i<aimesh->mNumVertices; i++) {
nuclear@13: 		Vector3 pt = assimp_vector(aimesh->mVertices[i]);
nuclear@13: 		curve->add_point(pt);
nuclear@13: 	}
nuclear@13: 	info_log("loaded curve with %d points\n", aimesh->mNumVertices);
nuclear@13: 
nuclear@13: 	return curve;
nuclear@13: }
nuclear@13: 
nuclear@13: static bool load_bones(Mesh *mesh, const aiMesh *aimesh)
nuclear@13: {
nuclear@13: 	if(!aimesh->mNumBones) {
nuclear@13: 		return false;
nuclear@13: 	}
nuclear@13: 
nuclear@13: 	for(unsigned int i=0; i<aimesh->mNumBones; i++) {
nuclear@13: 		aiBone *aibone = aimesh->mBones[i];
nuclear@13: 		Object *obj = obj_by_name[aibone->mName.data];
nuclear@13: 		if(!obj) {
nuclear@13: 			error_log("bone %s not found\n", aibone->mName.data);
nuclear@13: 			continue;
nuclear@13: 		}
nuclear@13: 
nuclear@13: 		obj->set_bone_matrix(assimp_matrix(aibone->mOffsetMatrix));
nuclear@13: 		mesh->add_bone(obj);
nuclear@13: 
nuclear@13: 		info_log("adding bone: %s\n", obj->get_name());
nuclear@13: 	}
nuclear@13: 
nuclear@13: 	return true;
nuclear@13: }
nuclear@13: 
nuclear@13: static Vector3 assimp_vector(const aiVector3D &v)
nuclear@13: {
nuclear@13: 	return Vector3(v[0], v[1], v[2]);
nuclear@13: }
nuclear@13: 
nuclear@13: static Quaternion assimp_quat(const aiQuaternion &q)
nuclear@13: {
nuclear@13: 	return Quaternion(q.w, Vector3(q.x, q.y, q.z));
nuclear@13: }
nuclear@13: 
nuclear@13: static Matrix4x4 assimp_matrix(const aiMatrix4x4 &aim)
nuclear@13: {
nuclear@13: 	Matrix4x4 m;
nuclear@13: 	memcpy(m[0], &aim, 16 * sizeof(float));
nuclear@13: 	return m;
nuclear@13: }
nuclear@13: 
nuclear@13: /* convert an assimp keyframe time (ticks) into milliseconds */
nuclear@13: static long assimp_time(const aiAnimation *anim, double aitime)
nuclear@13: {
nuclear@13: 	double sec;
nuclear@13: 	if(anim->mTicksPerSecond < 1e-6) {
nuclear@13: 		// assume time is in frames?
nuclear@13: 		sec = aitime / 30.0;
nuclear@13: 	} else {
nuclear@13: 		sec = aitime / anim->mTicksPerSecond;
nuclear@13: 	}
nuclear@13: 	return (long)(sec * 1000.0);
nuclear@13: }
nuclear@13: 
nuclear@13: static void print_hierarchy(const aiNode *node)
nuclear@13: {
nuclear@13: 	static int lvl;
nuclear@13: 	static int lvlopen[256];
nuclear@13: 
nuclear@13: 	for(int i=0; i<lvl; i++) {
nuclear@13: 		putchar(' ');
nuclear@13: 		if(lvlopen[i]) {
nuclear@13: 			putchar(i >= lvl - 1 ? '+' : '|');
nuclear@13: 		} else {
nuclear@13: 			putchar(i >= lvl - 1 ? '+' : ' ');
nuclear@13: 		}
nuclear@13: 	}
nuclear@13: 	info_log("- \"%s\"\n", node->mName.data);
nuclear@13: 
nuclear@13: 	lvlopen[lvl] = 1;
nuclear@13: 
nuclear@13: 	lvl++;
nuclear@13: 	for(unsigned int i=0; i<node->mNumChildren; i++) {
nuclear@13: 		if(i == node->mNumChildren - 1) {
nuclear@13: 			lvlopen[lvl - 1] = 0;
nuclear@13: 		}
nuclear@13: 		print_hierarchy(node->mChildren[i]);
nuclear@13: 	}
nuclear@13: 	lvl--;
nuclear@13: }
nuclear@13: 
nuclear@13: #else	// !defined USE_ASSIMP
nuclear@13: 
nuclear@13: bool load_ass(Scene *scn, const char *fname)
nuclear@13: {
nuclear@13: 	error_log("load_ass: assimp support not compiled in\n");
nuclear@13: 	return false;
nuclear@13: }
nuclear@13: 
nuclear@13: #endif