nuclear@29: #include <stdio.h>
nuclear@29: #include <stdlib.h>
nuclear@29: #include "goat3d.h"
nuclear@29: #include "assimp/cimport.h"
nuclear@29: #include "assimp/postprocess.h"
nuclear@29: #include "assimp/scene.h"
nuclear@29: 
nuclear@55: enum {
nuclear@55: 	CONV_SCENE,
nuclear@55: 	CONV_ANIM
nuclear@55: };
nuclear@55: 
nuclear@55: int convert(const char *infname);
nuclear@55: int convert_anim(const char *infname);
nuclear@29: void process_material(struct goat3d_material *mtl, struct aiMaterial *aimtl);
nuclear@29: void process_node(struct goat3d *goat, struct goat3d_node *parent, struct aiNode *ainode);
nuclear@55: int process_anim(struct goat3d *goat, struct aiAnimation *aianim);
nuclear@55: static int output_filename(char *buf, int bufsz, const char *fname, const char *suffix);
nuclear@55: static long assimp_time(const struct aiAnimation *anim, double aitime);
nuclear@29: 
nuclear@29: int main(int argc, char **argv)
nuclear@29: {
nuclear@29: 	int i, num_done = 0;
nuclear@55: 	int conv_targ = CONV_SCENE;
nuclear@29: 
nuclear@29: 	for(i=1; i<argc; i++) {
nuclear@29: 		if(argv[i][0] == '-') {
nuclear@55: 			if(argv[i][2] != 0) {
nuclear@55: 				fprintf(stderr, "invalid option: %s\n", argv[i]);
nuclear@55: 				return 1;
nuclear@55: 			}
nuclear@55: 
nuclear@55: 			switch(argv[i][1]) {
nuclear@55: 			case 'a':
nuclear@55: 				conv_targ = CONV_ANIM;
nuclear@55: 				break;
nuclear@55: 
nuclear@55: 			case 's':
nuclear@55: 				conv_targ = CONV_SCENE;
nuclear@55: 				break;
nuclear@55: 
nuclear@55: 			default:
nuclear@55: 				fprintf(stderr, "invalid option: %s\n", argv[i]);
nuclear@55: 				return 1;
nuclear@55: 			}
nuclear@55: 
nuclear@29: 		} else {
nuclear@55: 			if(conv_targ == CONV_SCENE) {
nuclear@55: 				convert(argv[i]);
nuclear@55: 			} else {
nuclear@55: 				convert_anim(argv[i]);
nuclear@29: 			}
nuclear@29: 			num_done++;
nuclear@29: 		}
nuclear@29: 	}
nuclear@29: 
nuclear@29: 	if(!num_done) {
nuclear@29: 		fprintf(stderr, "you must specify a 3D scene file to convert\n");
nuclear@29: 		return 1;
nuclear@29: 	}
nuclear@29: 
nuclear@29: 	return 0;
nuclear@29: }
nuclear@29: 
nuclear@55: #define SCE_PPFLAGS	\
nuclear@29: 	(aiProcess_Triangulate | \
nuclear@29: 	 aiProcess_GenNormals | \
nuclear@29: 	 aiProcess_JoinIdenticalVertices | \
nuclear@29: 	 aiProcess_CalcTangentSpace | \
nuclear@29: 	 aiProcess_LimitBoneWeights | \
nuclear@29: 	 aiProcess_GenUVCoords)
nuclear@29: 
nuclear@55: #define ANM_PPFLAGS \
nuclear@55: 	(aiProcess_LimitBoneWeights)
nuclear@55: 
nuclear@55: int convert(const char *infname)
nuclear@29: {
nuclear@55: 	int i, bufsz;
nuclear@29: 	const struct aiScene *aiscn;
nuclear@29: 	struct goat3d *goat;
nuclear@55: 	char *outfname;
nuclear@29: 
nuclear@55: 	bufsz = output_filename(0, 0, infname, "goat3d");
nuclear@55: 	outfname = alloca(bufsz);
nuclear@55: 	output_filename(outfname, bufsz, infname, "goat3d");
nuclear@55: 	printf("converting %s -> %s\n", infname, outfname);
nuclear@55: 
nuclear@55: 
nuclear@55: 	if(!(aiscn = aiImportFile(infname, SCE_PPFLAGS))) {
nuclear@29: 		fprintf(stderr, "failed to import %s\n", infname);
nuclear@29: 		return -1;
nuclear@29: 	}
nuclear@29: 
nuclear@29: 	goat = goat3d_create();
nuclear@29: 
nuclear@29: 	for(i=0; i<(int)aiscn->mNumMaterials; i++) {
nuclear@29: 		struct aiMaterial *aimat = aiscn->mMaterials[i];
nuclear@29: 		struct goat3d_material *mat = goat3d_create_mtl();
nuclear@29: 
nuclear@29: 		process_material(mat, aimat);
nuclear@29: 		goat3d_add_mtl(goat, mat);
nuclear@29: 	}
nuclear@29: 
nuclear@29: 	for(i=0; i<(int)aiscn->mRootNode->mNumChildren; i++) {
nuclear@29: 		process_node(goat, 0, aiscn->mRootNode->mChildren[i]);
nuclear@29: 	}
nuclear@29: 
nuclear@29: 	goat3d_save(goat, outfname);
nuclear@29: 	goat3d_free(goat);
nuclear@29: 	aiReleaseImport(aiscn);
nuclear@29: 	return 0;
nuclear@29: }
nuclear@29: 
nuclear@55: int convert_anim(const char *infname)
nuclear@55: {
nuclear@55: 	int i, bufsz;
nuclear@55: 	const struct aiScene *aiscn;
nuclear@55: 	struct goat3d *goat;
nuclear@55: 	char *outfname;
nuclear@55: 
nuclear@55: 	bufsz = output_filename(0, 0, infname, "goatanim");
nuclear@55: 	outfname = alloca(bufsz);
nuclear@55: 	output_filename(outfname, bufsz, infname, "goatanim");
nuclear@55: 	printf("converting %s -> %s\n", infname, outfname);
nuclear@55: 
nuclear@55: 
nuclear@55: 	if(!(aiscn = aiImportFile(infname, ANM_PPFLAGS))) {
nuclear@55: 		fprintf(stderr, "failed to import %s\n", infname);
nuclear@55: 		return -1;
nuclear@55: 	}
nuclear@55: 
nuclear@55: 	goat = goat3d_create();
nuclear@55: 
nuclear@55: 	for(i=0; i<(int)aiscn->mRootNode->mNumChildren; i++) {
nuclear@55: 		process_node(goat, 0, aiscn->mRootNode->mChildren[i]);
nuclear@55: 	}
nuclear@55: 
nuclear@55: 	for(i=0; i<aiscn->mNumAnimations; i++) {
nuclear@55: 		if(process_anim(goat, aiscn->mAnimations[i]) == -1) {
nuclear@55: 			return -1;
nuclear@55: 		}
nuclear@55: 	}
nuclear@55: 
nuclear@55: 	goat3d_save_anim(goat, outfname);
nuclear@55: 	goat3d_free(goat);
nuclear@55: 	aiReleaseImport(aiscn);
nuclear@55: 	return 0;
nuclear@55: }
nuclear@55: 
nuclear@29: void process_material(struct goat3d_material *mtl, struct aiMaterial *aimtl)
nuclear@29: {
nuclear@29: 	struct aiString aistr;
nuclear@29: 	struct aiColor4D color;
nuclear@29: 	float val;
nuclear@29: 
nuclear@29: 	if(aiGetMaterialString(aimtl, AI_MATKEY_NAME, &aistr) == aiReturn_SUCCESS) {
nuclear@29: 		goat3d_set_mtl_name(mtl, aistr.data);
nuclear@29: 	}
nuclear@29: 
nuclear@29: 	if(aiGetMaterialColor(aimtl, AI_MATKEY_COLOR_DIFFUSE, &color) == aiReturn_SUCCESS) {
nuclear@29: 		goat3d_set_mtl_attrib3f(mtl, GOAT3D_MAT_ATTR_DIFFUSE, color.r, color.g, color.b);
nuclear@29: 	}
nuclear@29: 
nuclear@29: 	if(aiGetMaterialColor(aimtl, AI_MATKEY_COLOR_SPECULAR, &color) == aiReturn_SUCCESS) {
nuclear@29: 		float sstr = 1.0;
nuclear@29: 		aiGetMaterialFloatArray(aimtl, AI_MATKEY_SHININESS_STRENGTH, &sstr, 0);
nuclear@29: 		goat3d_set_mtl_attrib3f(mtl, GOAT3D_MAT_ATTR_SPECULAR, color.r * sstr, color.g * sstr, color.b * sstr);
nuclear@29: 	}
nuclear@29: 
nuclear@29: 	if(aiGetMaterialFloatArray(aimtl, AI_MATKEY_BUMPSCALING, &val, 0) == aiReturn_SUCCESS) {
nuclear@29: 		goat3d_set_mtl_attrib3f(mtl, GOAT3D_MAT_ATTR_BUMP, val, val, val);
nuclear@29: 	}
nuclear@29: 
nuclear@29: 	if(aiGetMaterialFloatArray(aimtl, AI_MATKEY_REFLECTIVITY, &val, 0) == aiReturn_SUCCESS) {
nuclear@29: 		goat3d_set_mtl_attrib1f(mtl, GOAT3D_MAT_ATTR_REFLECTION, val);
nuclear@29: 	}
nuclear@29: 
nuclear@29: 	if(aiGetMaterialFloatArray(aimtl, AI_MATKEY_OPACITY, &val, 0) == aiReturn_SUCCESS) {
nuclear@29: 		goat3d_set_mtl_attrib1f(mtl, GOAT3D_MAT_ATTR_TRANSMISSION, 1.0 - val);
nuclear@29: 	}
nuclear@29: 
nuclear@29: 	if(aiGetMaterialString(aimtl, AI_MATKEY_TEXTURE_DIFFUSE(0), &aistr) == aiReturn_SUCCESS) {
nuclear@29: 		goat3d_set_mtl_attrib_map(mtl, GOAT3D_MAT_ATTR_DIFFUSE, aistr.data);
nuclear@29: 	}
nuclear@29: 	if(aiGetMaterialString(aimtl, AI_MATKEY_TEXTURE_SPECULAR(0), &aistr) == aiReturn_SUCCESS) {
nuclear@29: 		goat3d_set_mtl_attrib_map(mtl, GOAT3D_MAT_ATTR_SPECULAR, aistr.data);
nuclear@29: 	}
nuclear@29: 	if(aiGetMaterialString(aimtl, AI_MATKEY_TEXTURE_SHININESS(0), &aistr) == aiReturn_SUCCESS) {
nuclear@29: 		goat3d_set_mtl_attrib_map(mtl, GOAT3D_MAT_ATTR_SHININESS, aistr.data);
nuclear@29: 	}
nuclear@29: 	if(aiGetMaterialString(aimtl, AI_MATKEY_TEXTURE_NORMALS(0), &aistr) == aiReturn_SUCCESS) {
nuclear@29: 		goat3d_set_mtl_attrib_map(mtl, GOAT3D_MAT_ATTR_NORMAL, aistr.data);
nuclear@29: 	}
nuclear@29: 	if(aiGetMaterialString(aimtl, AI_MATKEY_TEXTURE_REFLECTION(0), &aistr) == aiReturn_SUCCESS) {
nuclear@29: 		goat3d_set_mtl_attrib_map(mtl, GOAT3D_MAT_ATTR_REFLECTION, aistr.data);
nuclear@29: 	}
nuclear@29: 	if(aiGetMaterialString(aimtl, AI_MATKEY_TEXTURE_OPACITY(0), &aistr) == aiReturn_SUCCESS) {
nuclear@29: 		// TODO this is semantically inverted... maybe add an alpha attribute?
nuclear@29: 		goat3d_set_mtl_attrib_map(mtl, GOAT3D_MAT_ATTR_TRANSMISSION, aistr.data);
nuclear@29: 	}
nuclear@29: }
nuclear@29: 
nuclear@29: void process_node(struct goat3d *goat, struct goat3d_node *parent, struct aiNode *ainode)
nuclear@29: {
nuclear@29: 	int i;
nuclear@29: 	struct goat3d_node *node;
nuclear@29: 
nuclear@29: 	node = goat3d_create_node();
nuclear@29: 	goat3d_set_node_name(node, ainode->mName.data);
nuclear@29: 
nuclear@29: 	for(i=0; i<ainode->mNumChildren; i++) {
nuclear@29: 		process_node(goat, node, ainode->mChildren[i]);
nuclear@29: 	}
nuclear@29: 
nuclear@29: 	goat3d_add_node(goat, node);
nuclear@29: }
nuclear@55: 
nuclear@55: int process_anim(struct goat3d *goat, struct aiAnimation *aianim)
nuclear@55: {
nuclear@55: 	int i, j, num_nodes, rnodes_count;
nuclear@55: 	const char *anim_name;
nuclear@55: 
nuclear@55: 	if(aianim->mName.length <= 0) {
nuclear@55: 		anim_name = "unnamed";
nuclear@55: 	} else {
nuclear@55: 		anim_name = aianim->mName.data;
nuclear@55: 	}
nuclear@55: 
nuclear@55: 	num_nodes = goat3d_get_node_count(goat);
nuclear@55: 
nuclear@55: 	rnodes_count = 0;
nuclear@55: 	for(i=0; i<num_nodes; i++) {
nuclear@55: 		int anim_idx;
nuclear@55: 		struct goat3d_node *n = goat3d_get_node(goat, i);
nuclear@55: 		/* skip non-root nodes */
nuclear@55: 		if(goat3d_get_node_parent(n)) {
nuclear@55: 			break;
nuclear@55: 		}
nuclear@55: 
nuclear@55: 		/* then add another animation to those root nodes */
nuclear@55: 		anim_idx = goat3d_get_anim_count(n);
nuclear@55: 		goat3d_add_anim(n);
nuclear@55: 		goat3d_use_anim(n, anim_idx);
nuclear@55: 
nuclear@55: 		goat3d_set_anim_name(n, anim_name);
nuclear@55: 	}
nuclear@55: 
nuclear@55: 	/* for each animation "channel" ... */
nuclear@55: 	for(i=0; i<(int)aianim->mNumChannels; i++) {
nuclear@55: 		struct goat3d_node *node;
nuclear@55: 		struct aiNodeAnim *ainodeanim = aianim->mChannels[i];
nuclear@55: 
nuclear@55: 		/* find the node it refers to */
nuclear@55: 		const char *nodename = ainodeanim->mNodeName.data;
nuclear@55: 		if(!(node = goat3d_get_node_by_name(goat, nodename))) {
nuclear@55: 			fprintf(stderr, "failed to process animation for unknown node: %s\n", nodename);
nuclear@55: 			return -1;
nuclear@55: 		}
nuclear@55: 
nuclear@55: 		/* add all the keys ... */
nuclear@55: 		for(j=0; j<(int)ainodeanim->mNumPositionKeys; j++) {
nuclear@55: 			struct aiVectorKey *key = ainodeanim->mPositionKeys + j;
nuclear@55: 			long tm = assimp_time(aianim, key->mTime);
nuclear@55: 			goat3d_set_node_position(node, key->mValue.x, key->mValue.y, key->mValue.z, tm);
nuclear@55: 		}
nuclear@55: 
nuclear@55: 		for(j=0; j<(int)ainodeanim->mNumRotationKeys; j++) {
nuclear@55: 			struct aiQuatKey *key = ainodeanim->mRotationKeys + j;
nuclear@55: 			long tm = assimp_time(aianim, key->mTime);
nuclear@55: 			goat3d_set_node_rotation(node, key->mValue.x, key->mValue.y, key->mValue.z, key->mValue.w, tm);
nuclear@55: 		}
nuclear@55: 
nuclear@55: 		for(j=0; j<(int)ainodeanim->mNumScalingKeys; j++) {
nuclear@55: 			struct aiVectorKey *key = ainodeanim->mScalingKeys + j;
nuclear@55: 			long tm = assimp_time(aianim, key->mTime);
nuclear@55: 			goat3d_set_node_scaling(node, key->mValue.x, key->mValue.y, key->mValue.z, tm);
nuclear@55: 		}
nuclear@55: 	}
nuclear@55: 
nuclear@55: 	return 0;
nuclear@55: }
nuclear@55: 
nuclear@55: static int output_filename(char *buf, int bufsz, const char *fname, const char *suffix)
nuclear@55: {
nuclear@55: 	int reqsz, namesz;
nuclear@55: 	char *tmpfname;
nuclear@55: 	const char *fname_end, *lastdot;
nuclear@55: 
nuclear@55: 	lastdot = strrchr(fname, '.');
nuclear@55: 
nuclear@56: 	fname_end = lastdot ? lastdot : fname + strlen(fname);
nuclear@55: 	namesz = fname_end - fname;
nuclear@55: 	reqsz = namesz + strlen(suffix) + 2;	/* plus 1 for the dot */
nuclear@55: 
nuclear@55: 	if(buf && bufsz) {
nuclear@55: 		tmpfname = alloca(namesz + 1);
nuclear@55: 		memcpy(tmpfname, fname, namesz);
nuclear@55: 		tmpfname[namesz] = 0;
nuclear@55: 
nuclear@55: 		if(suffix) {
nuclear@55: 			snprintf(buf, bufsz, "%s.%s", tmpfname, suffix);
nuclear@55: 		} else {
nuclear@55: 			strncpy(buf, tmpfname, bufsz);
nuclear@55: 		}
nuclear@55: 		buf[bufsz - 1] = 0;
nuclear@55: 	}
nuclear@55: 
nuclear@55: 	return reqsz;
nuclear@55: }
nuclear@55: 
nuclear@55: static long assimp_time(const struct aiAnimation *anim, double aitime)
nuclear@55: {
nuclear@55: 	double sec;
nuclear@55: 	if(anim->mTicksPerSecond < 1e-6) {
nuclear@55: 		/* assume time in frames? */
nuclear@55: 		sec = aitime / 30.0;
nuclear@55: 	} else {
nuclear@55: 		sec = aitime / anim->mTicksPerSecond;
nuclear@55: 	}
nuclear@55: 	return (long)(sec * 1000.0);
nuclear@55: }