1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/material.cc	Thu Jul 17 02:35:19 2014 +0300
     1.3 @@ -0,0 +1,20 @@
     1.4 +#include <GL/glew.h>
     1.5 +#include "material.h"
     1.6 +
     1.7 +Material::Material()
     1.8 +	: color(1, 1, 1), specular(0, 0, 0)
     1.9 +{
    1.10 +	shininess = 1.0;
    1.11 +	alpha = 1.0;
    1.12 +}
    1.13 +
    1.14 +void Material::setup() const
    1.15 +{
    1.16 +	float col[] = {color.x, color.y, color.z, alpha};
    1.17 +	glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, col);
    1.18 +
    1.19 +	float spec[] = {specular.x, specular.y, specular.z, 1.0};
    1.20 +	glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, spec);
    1.21 +
    1.22 +	glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, shininess > 128 ? 128 : shininess);
    1.23 +}

     2.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     2.2 +++ b/src/material.h	Thu Jul 17 02:35:19 2014 +0300
     2.3 @@ -0,0 +1,19 @@
     2.4 +#ifndef MATERIAL_H_
     2.5 +#define MATERIAL_H_
     2.6 +
     2.7 +#include "vmath.h"
     2.8 +
     2.9 +class Material {
    2.10 +public:
    2.11 +	Vector3 ambient;
    2.12 +	Vector3 diffuse;
    2.13 +	Vector3 specular;
    2.14 +	float shininess;
    2.15 +	float alpha;
    2.16 +
    2.17 +	Material();
    2.18 +
    2.19 +	void setup() const;
    2.20 +};
    2.21 +
    2.22 +#endif	// MATERIAL_H_

     3.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     3.2 +++ b/src/mesh.cc	Thu Jul 17 02:35:19 2014 +0300
     3.3 @@ -0,0 +1,101 @@
     3.4 +#include <stdio.h>
     3.5 +#include <string.h>
     3.6 +#include <GL/glew.h>
     3.7 +#include "mesh.h"
     3.8 +
     3.9 +#define ALL_VALID	0xffffffff
    3.10 +
    3.11 +Mesh::Mesh()
    3.12 +{
    3.13 +	buf_valid = ALL_VALID;
    3.14 +
    3.15 +	for(int i=0; i<vcount; i++) {
    3.16 +		attr[i] = 0;
    3.17 +		attr_size[i] = 0;
    3.18 +		buf_valid &= ~(1 << i);
    3.19 +	}
    3.20 +	vcount = 0;
    3.21 +	glGenBuffers(NUM_MESH_ATTRIBS, vbo);
    3.22 +}
    3.23 +
    3.24 +Mesh::~Mesh()
    3.25 +{
    3.26 +	for(int i=0; i<vcount; i++) {
    3.27 +		delete [] attr[i];
    3.28 +	}
    3.29 +	glDeleteBuffers(NUM_MESH_ATTRIBS, vbo);
    3.30 +}
    3.31 +
    3.32 +float *Mesh::set_attrib(int aidx, int count, int elemsz, float *data)
    3.33 +{
    3.34 +	if(attr[aidx]) {
    3.35 +		delete [] attr[aidx];
    3.36 +	}
    3.37 +	attr[aidx] = new float[count * elemsz];
    3.38 +	attr_size[aidx] = elemsz;
    3.39 +	buf_valid &= ~(1 << aidx);
    3.40 +	return attr[aidx];
    3.41 +}
    3.42 +
    3.43 +float *Mesh::get_attrib(int aidx)
    3.44 +{
    3.45 +	buf_valid &= ~(1 << aidx);
    3.46 +	return attr[aidx];
    3.47 +}
    3.48 +
    3.49 +const float *Mesh::get_attrib(int aidx) const
    3.50 +{
    3.51 +	return attr[aidx];
    3.52 +}
    3.53 +
    3.54 +void Mesh::draw() const
    3.55 +{
    3.56 +	update_buffers();
    3.57 +
    3.58 +	if(!vbo[MESH_ATTR_VERTEX]) {
    3.59 +		fprintf(stderr, "trying to render without a vertex buffer\n");
    3.60 +		return;
    3.61 +	}
    3.62 +
    3.63 +	glBindBuffer(GL_ARRAY_BUFFER, vbo[MESH_ATTR_VERTEX]);
    3.64 +	glEnableClientState(GL_VERTEX_ARRAY);
    3.65 +	glVertexPointer(attr_size[MESH_ATTR_VERTEX], GL_FLOAT, 0, 0);
    3.66 +
    3.67 +	if(vbo[MESH_ATTR_NORMAL]) {
    3.68 +		glBindBuffer(GL_ARRAY_BUFFER, vbo[MESH_ATTR_NORMAL]);
    3.69 +		glEnableClientState(GL_NORMAL_ARRAY);
    3.70 +		glNormalPointer(GL_FLOAT, 0, 0);
    3.71 +	}
    3.72 +	if(vbo[MESH_ATTR_TEXCOORD]) {
    3.73 +		glBindBuffer(GL_ARRAY_BUFFER, vbo[MESH_ATTR_TEXCOORD]);
    3.74 +		glEnableClientState(GL_TEXTURE_COORD_ARRAY);
    3.75 +		glTexCoordPointer(attr_size[MESH_ATTR_TEXCOORD], GL_FLOAT, 0, 0);
    3.76 +	}
    3.77 +	glBindBuffer(GL_ARRAY_BUFFER, 0);
    3.78 +
    3.79 +	glDrawArrays(GL_TRIANGLES, 0, vcount);
    3.80 +
    3.81 +	glDisableClientState(GL_VERTEX_ARRAY);
    3.82 +	if(vbo[MESH_ATTR_NORMAL]) {
    3.83 +		glDisableClientState(GL_NORMAL_ARRAY);
    3.84 +	}
    3.85 +	if(vbo[MESH_ATTR_TEXCOORD]) {
    3.86 +		glDisableClientState(GL_TEXTURE_COORD_ARRAY);
    3.87 +	}
    3.88 +}
    3.89 +
    3.90 +void Mesh::update_buffers() const
    3.91 +{
    3.92 +	if(buf_valid == ALL_VALID) {
    3.93 +		return;
    3.94 +	}
    3.95 +
    3.96 +	for(int i=0; i<NUM_MESH_ATTRIBS; i++) {
    3.97 +		if((buf_valid & (1 << i)) == 0) {
    3.98 +			glBindBuffer(GL_ARRAY_BUFFER, vbo[i]);
    3.99 +			glBufferData(GL_ARRAY_BUFFER, vcount * attr_size[i] * sizeof(float),
   3.100 +					attr[i], GL_STATIC_DRAW);
   3.101 +			buf_valid |= 1 << i;
   3.102 +		}
   3.103 +	}
   3.104 +}

     4.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     4.2 +++ b/src/mesh.h	Thu Jul 17 02:35:19 2014 +0300
     4.3 @@ -0,0 +1,33 @@
     4.4 +#ifndef MESH_H_
     4.5 +#define MESH_H_
     4.6 +
     4.7 +enum {
     4.8 +	MESH_ATTR_VERTEX,
     4.9 +	MESH_ATTR_NORMAL,
    4.10 +	MESH_ATTR_TEXCOORD,
    4.11 +
    4.12 +	NUM_MESH_ATTRIBS
    4.13 +};
    4.14 +
    4.15 +class Mesh {
    4.16 +private:
    4.17 +	float *attr[NUM_MESH_ATTRIBS];
    4.18 +	int vcount;
    4.19 +	unsigned int vbo[NUM_MESH_ATTRIBS];
    4.20 +	int attr_size[NUM_MESH_ATTRIBS];
    4.21 +
    4.22 +	mutable unsigned int buf_valid;	/* bitmask */
    4.23 +	void update_buffers() const;
    4.24 +
    4.25 +public:
    4.26 +	Mesh();
    4.27 +	~Mesh();
    4.28 +
    4.29 +	float *set_attrib(int aidx, int count, int elemsz, float *data = 0);
    4.30 +	float *get_attrib(int aidx);
    4.31 +	const float *get_attrib(int aidx) const;
    4.32 +
    4.33 +	void draw() const;
    4.34 +};
    4.35 +
    4.36 +#endif	// MESH_H_

     5.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     5.2 +++ b/src/object.cc	Thu Jul 17 02:35:19 2014 +0300
     5.3 @@ -0,0 +1,24 @@
     5.4 +#include "object.h"
     5.5 +
     5.6 +Object::Object()
     5.7 +{
     5.8 +	mesh = 0;
     5.9 +}
    5.10 +
    5.11 +void Object::set_mesh(Mesh *mesh)
    5.12 +{
    5.13 +	this->mesh = mesh;
    5.14 +}
    5.15 +
    5.16 +Mesh *Object::get_mesh() const
    5.17 +{
    5.18 +	return mesh;
    5.19 +}
    5.20 +
    5.21 +void Object::render() const
    5.22 +{
    5.23 +	if(!mesh) return;
    5.24 +
    5.25 +	mtl.setup();
    5.26 +	mesh->draw();
    5.27 +}

     6.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     6.2 +++ b/src/object.h	Thu Jul 17 02:35:19 2014 +0300
     6.3 @@ -0,0 +1,22 @@
     6.4 +#ifndef OBJECT_H_
     6.5 +#define OBJECT_H_
     6.6 +
     6.7 +#include "mesh.h"
     6.8 +#include "material.h"
     6.9 +
    6.10 +class Object {
    6.11 +private:
    6.12 +	Mesh *mesh;
    6.13 +
    6.14 +public:
    6.15 +	Material mtl;
    6.16 +
    6.17 +	Object();
    6.18 +
    6.19 +	void set_mesh(Mesh *mesh);
    6.20 +	Mesh *get_mesh() const;
    6.21 +
    6.22 +	void render() const;
    6.23 +};
    6.24 +
    6.25 +#endif	// OBJECT_H_

     7.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     7.2 +++ b/src/objfile.cc	Thu Jul 17 02:35:19 2014 +0300
     7.3 @@ -0,0 +1,542 @@
     7.4 +#include <stdlib.h>
     7.5 +#include <string.h>
     7.6 +#include <ctype.h>
     7.7 +#include <limits.h>
     7.8 +#include <vector>
     7.9 +#include <map>
    7.10 +#include <string>
    7.11 +#include <sstream>
    7.12 +#include <iomanip>
    7.13 +#include "scene.h"
    7.14 +
    7.15 +using namespace std;
    7.16 +
    7.17 +#define COMMANDS	\
    7.18 +	CMD(V),			\
    7.19 +	CMD(VN),		\
    7.20 +	CMD(VT),		\
    7.21 +	CMD(F),			\
    7.22 +	CMD(O),			\
    7.23 +	CMD(G),			\
    7.24 +	CMD(MTLLIB),	\
    7.25 +	CMD(USEMTL),	\
    7.26 +	CMD(NEWMTL),	\
    7.27 +	CMD(KA),		\
    7.28 +	CMD(KD),		\
    7.29 +	CMD(KS),		\
    7.30 +	CMD(NS),		\
    7.31 +	CMD(NI),		\
    7.32 +	CMD(D),			\
    7.33 +	CMD(TR),		\
    7.34 +	CMD(MAP_KD),	\
    7.35 +	CMD(MAP_KS),	\
    7.36 +	CMD(MAP_NS),	\
    7.37 +	CMD(MAP_D),		\
    7.38 +	CMD(REFL),		\
    7.39 +	CMD(BUMP)
    7.40 +
    7.41 +#define CMD(x)	CMD_##x
    7.42 +enum {
    7.43 +	COMMANDS,
    7.44 +	CMD_UNK
    7.45 +};
    7.46 +#undef CMD
    7.47 +
    7.48 +#define CMD(x)	#x
    7.49 +static const char *cmd_names[] = {
    7.50 +	COMMANDS,
    7.51 +	0
    7.52 +};
    7.53 +#undef CMD
    7.54 +
    7.55 +
    7.56 +struct ObjFace {
    7.57 +	int elem;
    7.58 +	int v[4], n[4], t[4];
    7.59 +};
    7.60 +
    7.61 +struct ObjFile {
    7.62 +	string cur_obj, cur_mat;
    7.63 +	vector<Vector3> v, vn;
    7.64 +	vector<Vector2> vt;
    7.65 +	vector<ObjFace> f;
    7.66 +};
    7.67 +
    7.68 +typedef Vector3 Color;
    7.69 +
    7.70 +struct ObjMat {
    7.71 +	string name;		// newmtl <name>
    7.72 +	Color ambient, diffuse, specular;	// Ka, Kd, Ks
    7.73 +	float shininess;	// Ns
    7.74 +	float ior;			// Ni
    7.75 +	float alpha;		// d, Tr
    7.76 +
    7.77 +	string tex_dif, tex_spec, tex_shin, tex_alpha;	// map_Kd, map_Ks, map_Ns, map_d
    7.78 +	string tex_refl;	// refl -type sphere|cube file
    7.79 +	string tex_bump;	// bump
    7.80 +
    7.81 +	ObjMat() { reset(); }
    7.82 +
    7.83 +	void reset() {
    7.84 +		ambient = diffuse = Color(0.5, 0.5, 0.5);
    7.85 +		specular = Color(0.0, 0.0, 0.0);
    7.86 +		name = tex_dif = tex_spec = tex_shin = tex_alpha = tex_refl = tex_bump = "";
    7.87 +		shininess = 0;
    7.88 +		ior = alpha = 1;
    7.89 +	}
    7.90 +};
    7.91 +
    7.92 +static bool read_materials(FILE *fp, vector<ObjMat> *vmtl);
    7.93 +static Object *cons_object(ObjFile *obj);
    7.94 +
    7.95 +static int get_cmd(char *str);
    7.96 +static bool is_int(const char *str);
    7.97 +static bool is_float(const char *str);
    7.98 +static bool parse_vec(Vector3 *vec);
    7.99 +static bool parse_color(Color *col);
   7.100 +static bool parse_face(ObjFace *face);
   7.101 +static const char *parse_map();
   7.102 +
   7.103 +
   7.104 +static map<string, Material> matlib;
   7.105 +
   7.106 +
   7.107 +#define INVALID_IDX		INT_MIN
   7.108 +
   7.109 +#define SEP		" \t\n\r\v"
   7.110 +#define BUF_SZ	512
   7.111 +bool Scene::load_obj(FILE *fp)
   7.112 +{
   7.113 +	static int seq;
   7.114 +	char cur_name[16];
   7.115 +	stringstream sstr;
   7.116 +
   7.117 +	ObjFile obj;
   7.118 +
   7.119 +	sprintf(cur_name, "default%02d.obj", seq++);
   7.120 +	obj.cur_obj = cur_name;
   7.121 +
   7.122 +	int prev_cmd = 0, obj_added = 0;
   7.123 +	for(;;) {
   7.124 +		Vector3 vec;
   7.125 +		ObjFace face;
   7.126 +
   7.127 +		char line[BUF_SZ];
   7.128 +		fgets(line, sizeof line, fp);
   7.129 +		if(feof(fp)) {
   7.130 +			break;
   7.131 +		}
   7.132 +
   7.133 +		char *tok;
   7.134 +		if(!(tok = strtok(line, SEP))) {
   7.135 +			continue; // ignore empty lines
   7.136 +		}
   7.137 +
   7.138 +		int cmd;
   7.139 +		if((cmd = get_cmd(tok)) == -1) {
   7.140 +			continue; // ignore unknown commands ...
   7.141 +		}
   7.142 +
   7.143 +		switch(cmd) {
   7.144 +		case CMD_V:
   7.145 +			if(!parse_vec(&vec)) {
   7.146 +				continue;
   7.147 +			}
   7.148 +			obj.v.push_back(vec);
   7.149 +			break;
   7.150 +
   7.151 +		case CMD_VN:
   7.152 +			if(!parse_vec(&vec)) {
   7.153 +				continue;
   7.154 +			}
   7.155 +			obj.vn.push_back(vec);
   7.156 +			break;
   7.157 +
   7.158 +		case CMD_VT:
   7.159 +			if(!parse_vec(&vec)) {
   7.160 +				continue;
   7.161 +			}
   7.162 +			vec.y = 1.0 - vec.y;
   7.163 +			obj.vt.push_back(Vector2(vec.x, vec.y));
   7.164 +			break;
   7.165 +
   7.166 +		case CMD_O:
   7.167 +		case CMD_G:
   7.168 +			if(prev_cmd == CMD_O || prev_cmd == CMD_G) {
   7.169 +				break;	// just in case we've got both of them in a row
   7.170 +			}
   7.171 +			/* if we have any previous data, group them up, add the object
   7.172 +			 * and continue with the new one...
   7.173 +			 */
   7.174 +			if(!obj.f.empty()) {
   7.175 +				Object *robj = cons_object(&obj);
   7.176 +				robj->mtl = matlib[obj.cur_mat];
   7.177 +				add_object(robj);
   7.178 +				obj_added++;
   7.179 +
   7.180 +				obj.f.clear();	// clean the face list
   7.181 +			}
   7.182 +			if((tok = strtok(0, SEP))) {
   7.183 +				obj.cur_obj = tok;
   7.184 +			} else {
   7.185 +				sprintf(cur_name, "default%02d.obj", seq++);
   7.186 +				obj.cur_obj = cur_name;
   7.187 +			}
   7.188 +			break;
   7.189 +
   7.190 +		case CMD_MTLLIB:
   7.191 +			if((tok = strtok(0, SEP))) {
   7.192 +				FILE *mfile;
   7.193 +				if(!(mfile = fopen(tok, "rb"))) {
   7.194 +					fprintf(stderr, "failed to open material library: %s\n", tok);
   7.195 +					continue;
   7.196 +				}
   7.197 +
   7.198 +				// load all materials of the mtl file into a vector
   7.199 +				vector<ObjMat> vmtl;
   7.200 +				if(!read_materials(mfile, &vmtl)) {
   7.201 +					continue;
   7.202 +				}
   7.203 +				fclose(mfile);
   7.204 +
   7.205 +				// and add them all to the scene
   7.206 +				for(size_t i=0; i<vmtl.size(); i++) {
   7.207 +					Material mat;
   7.208 +					mat.ambient = vmtl[i].ambient;
   7.209 +					mat.diffuse = vmtl[i].diffuse;
   7.210 +					mat.specular = vmtl[i].specular;
   7.211 +					mat.shininess = vmtl[i].shininess;
   7.212 +					mat.alpha = vmtl[i].alpha;
   7.213 +
   7.214 +					/*if(vmtl[i].tex_dif.length()) {
   7.215 +						mat.set_texture(get_texture(vmtl[i].tex_dif.c_str()));
   7.216 +					}*/
   7.217 +
   7.218 +					matlib[vmtl[i].name] = mat;
   7.219 +				}
   7.220 +			}
   7.221 +			break;
   7.222 +
   7.223 +		case CMD_USEMTL:
   7.224 +			if((tok = strtok(0, SEP))) {
   7.225 +				obj.cur_mat = tok;
   7.226 +			} else {
   7.227 +				obj.cur_mat = "";
   7.228 +			}
   7.229 +			break;
   7.230 +
   7.231 +		case CMD_F:
   7.232 +			if(!parse_face(&face)) {
   7.233 +				continue;
   7.234 +			}
   7.235 +
   7.236 +			// convert negative indices to regular indices
   7.237 +			for(int i=0; i<4; i++) {
   7.238 +				if(face.v[i] < 0 && face.v[i] != INVALID_IDX) {
   7.239 +					face.v[i] = obj.v.size() + face.v[i];
   7.240 +				}
   7.241 +				if(face.n[i] < 0 && face.n[i] != INVALID_IDX) {
   7.242 +					face.n[i] = obj.vn.size() + face.n[i];
   7.243 +				}
   7.244 +				if(face.t[i] < 0 && face.t[i] != INVALID_IDX) {
   7.245 +					face.t[i] = obj.vt.size() + face.t[i];
   7.246 +				}
   7.247 +			}
   7.248 +
   7.249 +			// break quads into triangles if needed
   7.250 +			obj.f.push_back(face);
   7.251 +			if(face.elem == 4) {
   7.252 +				face.v[1] = face.v[2];
   7.253 +				face.n[1] = face.n[2];
   7.254 +				face.t[1] = face.t[2];
   7.255 +
   7.256 +				face.v[2] = face.v[3];
   7.257 +				face.n[2] = face.n[3];
   7.258 +				face.t[2] = face.t[3];
   7.259 +
   7.260 +				obj.f.push_back(face);
   7.261 +			}
   7.262 +			break;
   7.263 +
   7.264 +		default:
   7.265 +			break;	// ignore unknown commands
   7.266 +		}
   7.267 +
   7.268 +		prev_cmd = cmd;
   7.269 +	}
   7.270 +
   7.271 +	// reached end of file...
   7.272 +	if(!obj.f.empty()) {
   7.273 +		Object *robj = cons_object(&obj);
   7.274 +		robj->mtl = matlib[obj.cur_mat];
   7.275 +		add_object(robj);
   7.276 +		obj_added++;
   7.277 +	}
   7.278 +
   7.279 +	return obj_added > 0;
   7.280 +}
   7.281 +
   7.282 +static Object *cons_object(ObjFile *obj)
   7.283 +{
   7.284 +	Object *robj;
   7.285 +	Vector3 *varr, *narr;
   7.286 +	Vector2 *tarr;
   7.287 +
   7.288 +	int nelem = obj->f.size() * 3;
   7.289 +
   7.290 +	try {
   7.291 +		robj = new Object;
   7.292 +		varr = new Vector3[nelem];
   7.293 +		narr = new Vector3[nelem];
   7.294 +		tarr = new Vector2[nelem];
   7.295 +	}
   7.296 +	catch(...) {
   7.297 +		return 0;
   7.298 +	}
   7.299 +	/*if(obj->cur_obj.length() > 0) {
   7.300 +		robj->set_name(obj->cur_obj.c_str());
   7.301 +	}*/
   7.302 +
   7.303 +	// need at least one of each element
   7.304 +	bool added_norm = false, added_tc = false;
   7.305 +	if(obj->vn.empty()) {
   7.306 +		obj->vn.push_back(Vector3(0, 0, 0));
   7.307 +		added_norm = true;;
   7.308 +	}
   7.309 +	if(obj->vt.empty()) {
   7.310 +		obj->vt.push_back(Vector2(0, 0));
   7.311 +		added_tc = true;
   7.312 +	}
   7.313 +
   7.314 +	for(size_t i=0; i<obj->f.size(); i++) {
   7.315 +		for(int j=0; j<3; j++) {
   7.316 +			int idx = i * 3 + j;
   7.317 +			ObjFace *f = &obj->f[i];
   7.318 +
   7.319 +			varr[idx] = obj->v[f->v[j]];
   7.320 +			narr[idx] = obj->vn[f->n[j] < 0 ? 0 : f->n[j]];
   7.321 +
   7.322 +			float t = obj->vt[f->t[j] < 0 ? 0 : f->t[j]].x;
   7.323 +			float s = obj->vt[f->t[j] < 0 ? 0 : f->t[j]].y;
   7.324 +			tarr[idx] = Vector2(t, s);
   7.325 +		}
   7.326 +	}
   7.327 +
   7.328 +	if(added_norm) {
   7.329 +		obj->vn.pop_back();
   7.330 +	}
   7.331 +	if(added_tc) {
   7.332 +		obj->vt.pop_back();
   7.333 +	}
   7.334 +
   7.335 +	Mesh *mesh = robj->get_mesh();
   7.336 +	mesh->set_attrib(MESH_ATTR_VERTEX, nelem, 3, &varr->x);
   7.337 +	mesh->set_attrib(MESH_ATTR_NORMAL, nelem, 3, &narr->x);
   7.338 +	mesh->set_attrib(MESH_ATTR_TEXCOORD, nelem, 2, &tarr->x);
   7.339 +
   7.340 +	delete [] varr;
   7.341 +	delete [] narr;
   7.342 +	delete [] tarr;
   7.343 +	return robj;
   7.344 +}
   7.345 +
   7.346 +static bool read_materials(FILE *fp, vector<ObjMat> *vmtl)
   7.347 +{
   7.348 +	ObjMat mat;
   7.349 +
   7.350 +	for(;;) {
   7.351 +		char line[BUF_SZ];
   7.352 +		fgets(line, sizeof line, fp);
   7.353 +		if(feof(fp)) {
   7.354 +			break;
   7.355 +		}
   7.356 +
   7.357 +		char *tok;
   7.358 +		if(!(tok = strtok(line, SEP))) {
   7.359 +			continue;
   7.360 +		}
   7.361 +
   7.362 +		int cmd;
   7.363 +		if((cmd = get_cmd(tok)) == -1) {
   7.364 +			continue;
   7.365 +		}
   7.366 +
   7.367 +		switch(cmd) {
   7.368 +		case CMD_NEWMTL:
   7.369 +			// add the previous material, and start a new one
   7.370 +			if(mat.name.length() > 0) {
   7.371 +				vmtl->push_back(mat);
   7.372 +				mat.reset();
   7.373 +			}
   7.374 +			if((tok = strtok(0, SEP))) {
   7.375 +				mat.name = tok;
   7.376 +			}
   7.377 +			break;
   7.378 +
   7.379 +		case CMD_KA:
   7.380 +			parse_color(&mat.ambient);
   7.381 +			break;
   7.382 +
   7.383 +		case CMD_KD:
   7.384 +			parse_color(&mat.diffuse);
   7.385 +			break;
   7.386 +
   7.387 +		case CMD_KS:
   7.388 +			parse_color(&mat.specular);
   7.389 +			break;
   7.390 +
   7.391 +		case CMD_NS:
   7.392 +			if((tok = strtok(0, SEP)) && is_float(tok)) {
   7.393 +				mat.shininess = atof(tok);
   7.394 +			}
   7.395 +			break;
   7.396 +
   7.397 +		case CMD_NI:
   7.398 +			if((tok = strtok(0, SEP)) && is_float(tok)) {
   7.399 +				mat.ior = atof(tok);
   7.400 +			}
   7.401 +			break;
   7.402 +
   7.403 +		case CMD_D:
   7.404 +		case CMD_TR:
   7.405 +			{
   7.406 +				Color c;
   7.407 +				if(parse_color(&c)) {
   7.408 +					mat.alpha = cmd == CMD_D ? c.x : 1.0 - c.x;
   7.409 +				}
   7.410 +			}
   7.411 +			break;
   7.412 +
   7.413 +		case CMD_MAP_KD:
   7.414 +			mat.tex_dif = parse_map();
   7.415 +			break;
   7.416 +
   7.417 +		default:
   7.418 +			break;
   7.419 +		}
   7.420 +	}
   7.421 +
   7.422 +	if(mat.name.length() > 0) {
   7.423 +		vmtl->push_back(mat);
   7.424 +	}
   7.425 +	return true;
   7.426 +}
   7.427 +
   7.428 +static int get_cmd(char *str)
   7.429 +{
   7.430 +	char *s = str;
   7.431 +	while((*s = toupper(*s))) s++;
   7.432 +
   7.433 +	for(int i=0; cmd_names[i]; i++) {
   7.434 +		if(strcmp(str, cmd_names[i]) == 0) {
   7.435 +			return i;
   7.436 +		}
   7.437 +	}
   7.438 +	return CMD_UNK;
   7.439 +}
   7.440 +
   7.441 +static bool is_int(const char *str)
   7.442 +{
   7.443 +	char *tmp;
   7.444 +	strtol(str, &tmp, 10);
   7.445 +	return tmp != str;
   7.446 +}
   7.447 +
   7.448 +static bool is_float(const char *str)
   7.449 +{
   7.450 +	char *tmp;
   7.451 +	strtod(str, &tmp);
   7.452 +	return tmp != str;
   7.453 +}
   7.454 +
   7.455 +static bool parse_vec(Vector3 *vec)
   7.456 +{
   7.457 +	for(int i=0; i<3; i++) {
   7.458 +		char *tok;
   7.459 +
   7.460 +		if(!(tok = strtok(0, SEP)) || !is_float(tok)) {
   7.461 +			if(i < 2) {
   7.462 +				return false;
   7.463 +			}
   7.464 +			vec->z = 0.0;
   7.465 +		} else {
   7.466 +			(*vec)[i] = atof(tok);
   7.467 +		}
   7.468 +	}
   7.469 +	return true;
   7.470 +}
   7.471 +
   7.472 +static bool parse_color(Color *col)
   7.473 +{
   7.474 +	for(int i=0; i<3; i++) {
   7.475 +		char *tok;
   7.476 +
   7.477 +		if(!(tok = strtok(0, SEP)) || !is_float(tok)) {
   7.478 +			col->y = col->z = col->x;
   7.479 +			return i > 0 ? true : false;
   7.480 +		}
   7.481 +		(*col)[i] = atof(tok);
   7.482 +	}
   7.483 +	return true;
   7.484 +}
   7.485 +
   7.486 +static bool parse_face(ObjFace *face)
   7.487 +{
   7.488 +	char *tok[] = {0, 0, 0, 0};
   7.489 +	face->elem = 0;
   7.490 +
   7.491 +	for(int i=0; i<4; i++) {
   7.492 +		if((!(tok[i] = strtok(0, SEP)) || !is_int(tok[i]))) {
   7.493 +			if(i < 3) return false;	// less than 3 verts? not a polygon
   7.494 +		} else {
   7.495 +			face->elem++;
   7.496 +		}
   7.497 +	}
   7.498 +
   7.499 +	for(int i=0; i<4; i++) {
   7.500 +		char *subtok = tok[i];
   7.501 +
   7.502 +		if(!subtok || !*subtok || !is_int(subtok)) {
   7.503 +			if(i < 3) {
   7.504 +				return false;
   7.505 +			}
   7.506 +			face->v[i] = INVALID_IDX;
   7.507 +		} else {
   7.508 +			face->v[i] = atoi(subtok);
   7.509 +			if(face->v[i] > 0) face->v[i]--;	/* convert to 0-based */
   7.510 +		}
   7.511 +
   7.512 +		while(subtok && *subtok && *subtok != '/') {
   7.513 +			subtok++;
   7.514 +		}
   7.515 +		if(subtok && *subtok && *++subtok && is_int(subtok)) {
   7.516 +			face->t[i] = atoi(subtok);
   7.517 +			if(face->t[i] > 0) face->t[i]--;	/* convert to 0-based */
   7.518 +		} else {
   7.519 +			face->t[i] = INVALID_IDX;
   7.520 +		}
   7.521 +
   7.522 +		while(subtok && *subtok && *subtok != '/') {
   7.523 +			subtok++;
   7.524 +		}
   7.525 +		if(subtok && *subtok && *++subtok && is_int(subtok)) {
   7.526 +			face->n[i] = atoi(subtok);
   7.527 +			if(face->n[i] > 0) face->n[i]--;	/* convert to 0-based */
   7.528 +		} else {
   7.529 +			face->n[i] = INVALID_IDX;
   7.530 +		}
   7.531 +	}
   7.532 +
   7.533 +	return true;
   7.534 +}
   7.535 +
   7.536 +static const char *parse_map()
   7.537 +{
   7.538 +	char *tok, *prev = 0;
   7.539 +
   7.540 +	while((tok = strtok(0, SEP))) {
   7.541 +		prev = tok;
   7.542 +	}
   7.543 +
   7.544 +	return prev ? prev : "";
   7.545 +}

     8.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     8.2 +++ b/src/scene.cc	Thu Jul 17 02:35:19 2014 +0300
     8.3 @@ -0,0 +1,67 @@
     8.4 +#include <stdio.h>
     8.5 +#include <stdlib.h>
     8.6 +#include "scene.h"
     8.7 +
     8.8 +Scene::~Scene()
     8.9 +{
    8.10 +	for(size_t i=0; i<objects.size(); i++) {
    8.11 +		delete objects[i];
    8.12 +	}
    8.13 +	for(size_t i=0; i<meshes.size(); i++) {
    8.14 +		delete meshes[i];
    8.15 +	}
    8.16 +}
    8.17 +
    8.18 +bool Scene::load(const char *fname)
    8.19 +{
    8.20 +	FILE *fp = fopen(fname, "rb");
    8.21 +	if(!fp) {
    8.22 +		fprintf(stderr, "failed to open scene file: %s\n", fname);
    8.23 +		return false;
    8.24 +	}
    8.25 +
    8.26 +	bool res = load_obj(fp);
    8.27 +	fclose(fp);
    8.28 +	return res;
    8.29 +}
    8.30 +
    8.31 +void Scene::add_object(Object *obj)
    8.32 +{
    8.33 +	objects.push_back(obj);
    8.34 +}
    8.35 +
    8.36 +void Scene::add_mesh(Mesh *mesh)
    8.37 +{
    8.38 +	meshes.push_back(mesh);
    8.39 +}
    8.40 +
    8.41 +int Scene::get_num_objects() const
    8.42 +{
    8.43 +	return (int)objects.size();
    8.44 +}
    8.45 +
    8.46 +int Scene::get_num_meshes() const
    8.47 +{
    8.48 +	return (int)meshes.size();
    8.49 +}
    8.50 +
    8.51 +Object *Scene::get_object(int idx) const
    8.52 +{
    8.53 +	return objects[idx];
    8.54 +}
    8.55 +
    8.56 +Mesh *Scene::get_mesh(int idx) const
    8.57 +{
    8.58 +	return meshes[idx];
    8.59 +}
    8.60 +
    8.61 +void Scene::update(long msec)
    8.62 +{
    8.63 +}
    8.64 +
    8.65 +void Scene::render() const
    8.66 +{
    8.67 +	for(size_t i=0; i<objects.size(); i++) {
    8.68 +		objects[i]->render();
    8.69 +	}
    8.70 +}

     9.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     9.2 +++ b/src/scene.h	Thu Jul 17 02:35:19 2014 +0300
     9.3 @@ -0,0 +1,34 @@
     9.4 +#ifndef SCENE_H_
     9.5 +#define SCENE_H_
     9.6 +
     9.7 +#include <stdio.h>
     9.8 +#include <vector>
     9.9 +#include "mesh.h"
    9.10 +#include "object.h"
    9.11 +
    9.12 +class Scene {
    9.13 +private:
    9.14 +	std::vector<Object*> objects;
    9.15 +	std::vector<Mesh*> meshes;
    9.16 +
    9.17 +	bool load_obj(FILE *fp);	// defined in objfile.cc
    9.18 +
    9.19 +public:
    9.20 +	~Scene();
    9.21 +
    9.22 +	bool load(const char *fname);
    9.23 +
    9.24 +	void add_object(Object *obj);
    9.25 +	void add_mesh(Mesh *mesh);
    9.26 +
    9.27 +	int get_num_objects() const;
    9.28 +	int get_num_meshes() const;
    9.29 +
    9.30 +	Object *get_object(int idx) const;
    9.31 +	Mesh *get_mesh(int idx) const;
    9.32 +
    9.33 +	void update(long msec);
    9.34 +	void render() const;
    9.35 +};
    9.36 +
    9.37 +#endif	// SCENE_H_

    10.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
    10.2 +++ b/src/vmath.h	Thu Jul 17 02:35:19 2014 +0300
    10.3 @@ -0,0 +1,37 @@
    10.4 +#ifndef VMATH_H_
    10.5 +#define VMATH_H_
    10.6 +
    10.7 +class Vector2 {
    10.8 +public:
    10.9 +	float x, y;
   10.10 +
   10.11 +	Vector2() : x(0), y(0) {}
   10.12 +	Vector2(float xa, float ya) : x(xa), y(ya) {}
   10.13 +
   10.14 +	float &operator [](int idx) { return (&x)[idx]; }
   10.15 +	const float &operator [](int idx) const { return (&x)[idx]; }
   10.16 +};
   10.17 +
   10.18 +class Vector3 {
   10.19 +public:
   10.20 +	float x, y, z;
   10.21 +
   10.22 +	Vector3() : x(0), y(0), z(0) {}
   10.23 +	Vector3(float xa, float ya, float za) : x(xa), y(ya), z(za) {}
   10.24 +
   10.25 +	float &operator [](int idx) { return (&x)[idx]; }
   10.26 +	const float &operator [](int idx) const { return (&x)[idx]; }
   10.27 +};
   10.28 +
   10.29 +class Vector4 {
   10.30 +public:
   10.31 +	float x, y, z, w;
   10.32 +
   10.33 +	Vector4() : x(0), y(0), z(0), w(0) {}
   10.34 +	Vector4(float xa, float ya, float za, float wa) : x(xa), y(ya), z(za), w(wa) {}
   10.35 +
   10.36 +	float &operator [](int idx) { return (&x)[idx]; }
   10.37 +	const float &operator [](int idx) const {  return (&x)[idx]; }
   10.38 +};
   10.39 +
   10.40 +#endif	// VMATH_H_