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Construct shape information.

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This commit is contained in:
Syoyo Fujita
2016-07-15 19:46:36 +09:00
parent 7a9a0e7cab
commit 3a96dc11ca
3 changed files with 408 additions and 311 deletions
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3
experimental/Makefile
View File

@@ -2,6 +2,9 @@ UNAME_S := $(shell uname -s)
ifeq ($(UNAME_S),Darwin)
LD_FLAGS=-framework OpenGL -lglfw3 -lglew
endif
ifeq ($(UNAME_S),Linux)
LD_FLAGS=-lGL -lGLU -lglfw3 -lGLEW -lX11 -lXrandr -lXinerama -lXxf86vm -lXcursor -lm -pthread -ldl
endif
all:
clang -c trackball.c

572
experimental/tinyobj_loader_c.h
View File

@@ -43,7 +43,7 @@ THE SOFTWARE.
#include <string.h>
typedef struct {
const char* name;
const char *name;
float ambient[3];
float diffuse[3];
@@ -51,36 +51,34 @@ typedef struct {
float transmittance[3];
float emission[3];
float shininess;
float ior; /* index of refraction */
float dissolve; /* 1 == opaque; 0 == fully transparent */
float ior; /* index of refraction */
float dissolve; /* 1 == opaque; 0 == fully transparent */
/* illumination model (see http://www.fileformat.info/format/material/) */
int illum;
const char* ambient_texname; /* map_Ka */
const char* diffuse_texname; /* map_Kd */
const char* specular_texname; /* map_Ks */
const char* specular_highlight_texname; /* map_Ns */
const char* bump_texname; /* map_bump, bump */
const char* displacement_texname; /* disp */
const char* alpha_texname; /* map_d */
const char *ambient_texname; /* map_Ka */
const char *diffuse_texname; /* map_Kd */
const char *specular_texname; /* map_Ks */
const char *specular_highlight_texname; /* map_Ns */
const char *bump_texname; /* map_bump, bump */
const char *displacement_texname; /* disp */
const char *alpha_texname; /* map_d */
} tinyobj_material_t;
typedef struct {
const char* name; /* group name or object name. */
const char *name; /* group name or object name. */
unsigned int face_offset;
unsigned int length;
} tinyobj_shape_t;
typedef struct {
int v_idx, vt_idx, vn_idx;
} tinyobj_vertex_index_t;
typedef struct { int v_idx, vt_idx, vn_idx; } tinyobj_vertex_index_t;
typedef struct {
float* vertices;
float *vertices;
unsigned int num_vertices;
float* normals;
float *normals;
unsigned int num_normals;
float* texcoords;
float *texcoords;
unsigned int num_texcoords;
tinyobj_vertex_index_t *faces;
unsigned int num_faces;
@@ -89,7 +87,10 @@ typedef struct {
int *material_ids;
} tinyobj_attrib_t;
#define TINYOBJ_FLAG_TRIANGULATE (1 << 0)
#define TINYOBJ_FLAG_TRIANGULATE (1 << 0)
#define TINYOBJ_INVALID_INDEX (0x80000000)
#define TINYOBJ_SUCCESS (0)
#define TINYOBJ_ERROR_EMPTY (-1)
#define TINYOBJ_ERROR_INVALID_PARAMETER (-2)
@@ -99,16 +100,23 @@ typedef struct {
* Retruns TINYOBJ_SUCCESS if things goes well.
* Retruns TINYOBJ_ERR_*** when there is an error.
*/
extern int tinyobj_parse(tinyobj_attrib_t *attrib, tinyobj_shape_t *shapes, size_t *num_shapes, const char *buf, size_t len, unsigned int flags);
extern int tinyobj_parse_obj(tinyobj_attrib_t *attrib, tinyobj_shape_t **shapes,
size_t *num_shapes, const char *buf, size_t len,
unsigned int flags);
extern void tinyobj_attrib_init(tinyobj_attrib_t *attrib);
extern void tinyobj_attrib_free(tinyobj_attrib_t *attrib);
extern void tinyobj_shape_free(tinyobj_shape_t *shapes, size_t num_shapes);
/* Parse .mtl string and construct material struct */
static int tinyobj_parse_mtl(tinyobj_material_t **materials, int *num_materials, const char* buf, size_t len);
#ifdef TINYOBJ_LOADER_C_IMPLEMENTATION
#define TINYOBJ_MAX_FACES_PER_F_LINE (32)
#define TINYOBJ_MAX_FACES_PER_F_LINE (32)
#define IS_SPACE(x) (((x) == ' ') || ((x) == '\t'))
#define IS_DIGIT(x) \
((unsigned int)((x) - '0') < (unsigned int)(10))
#define IS_DIGIT(x) ((unsigned int)((x) - '0') < (unsigned int)(10))
#define IS_NEW_LINE(x) (((x) == '\r') || ((x) == '\n') || ((x) == '\0'))
static void skip_space(const char **token) {
@@ -148,7 +156,8 @@ static int length_until_newline(const char *token, int n) {
return len;
}
/* http://stackoverflow.com/questions/5710091/how-does-atoi-function-in-c-work */
/* http://stackoverflow.com/questions/5710091/how-does-atoi-function-in-c-work
*/
static int my_atoi(const char *c) {
int value = 0;
int sign = 1;
@@ -156,7 +165,7 @@ static int my_atoi(const char *c) {
if (*c == '-') sign = -1;
c++;
}
while (((*c) >= '0') && ((*c) <= '9')) { /* isdigit(*c) */
while (((*c) >= '0') && ((*c) <= '9')) { /* isdigit(*c) */
value *= 10;
value += (int)(*c - '0');
c++;
@@ -168,7 +177,7 @@ static int my_atoi(const char *c) {
static int fixIndex(int idx, int n) {
if (idx > 0) return idx - 1;
if (idx == 0) return 0;
return n + idx; /* negative value = relative */
return n + idx; /* negative value = relative */
}
/* Parse raw triples: i, i/j/k, i//k, i/j */
@@ -211,7 +220,7 @@ static tinyobj_vertex_index_t parseRawTriple(const char **token) {
}
/* i/j/k */
(*token)++; /* skip '/' */
(*token)++; /* skip '/' */
vi.vn_idx = my_atoi((*token));
while ((*token)[0] != '\0' && (*token)[0] != '/' && (*token)[0] != ' ' &&
(*token)[0] != '\t' && (*token)[0] != '\r') {
@@ -375,18 +384,19 @@ static int tryParseDouble(const char *s, const char *s_end, double *result) {
assemble :
{
/* = pow(5.0, exponent); */
double a = 5.0;
int i;
for (i = 0; i < exponent; i++) {
a = a * a;
}
*result =
/* (sign == '+' ? 1 : -1) * ldexp(mantissa * pow(5.0, exponent), exponent); */
(sign == '+' ? 1 : -1) * (mantissa * a) *
(double)(1 << exponent); /* 5.0^exponent * 2^exponent */
{
/* = pow(5.0, exponent); */
double a = 1.0;
int i;
for (i = 0; i < exponent; i++) {
a = a * 5.0;
}
*result =
/* (sign == '+' ? 1 : -1) * ldexp(mantissa * pow(5.0, exponent),
exponent); */
(sign == '+' ? 1 : -1) * (mantissa * a) *
(double)(1 << exponent); /* 5.0^exponent * 2^exponent */
}
return 1;
fail:
@@ -398,8 +408,7 @@ static float parseFloat(const char **token) {
double val = 0.0;
float f = 0.0f;
skip_space(token);
end =
(*token) + until_space((*token));
end = (*token) + until_space((*token));
val = 0.0;
tryParseDouble((*token), end, &val);
f = (float)(val);
@@ -412,23 +421,22 @@ static void parseFloat2(float *x, float *y, const char **token) {
(*y) = parseFloat(token);
}
static void parseFloat3(float *x, float *y, float *z,
const char **token) {
static void parseFloat3(float *x, float *y, float *z, const char **token) {
(*x) = parseFloat(token);
(*y) = parseFloat(token);
(*z) = parseFloat(token);
}
static void InitMaterial(tinyobj_material_t *material) {
static void initMaterial(tinyobj_material_t *material) {
int i;
material->name = "";
material->ambient_texname = "";
material->diffuse_texname = "";
material->specular_texname = "";
material->specular_highlight_texname = "";
material->bump_texname = "";
material->displacement_texname = "";
material->alpha_texname = "";
material->name = NULL;
material->ambient_texname = NULL;
material->diffuse_texname = NULL;
material->specular_texname = NULL;
material->specular_highlight_texname = NULL;
material->bump_texname = NULL;
material->displacement_texname = NULL;
material->alpha_texname = NULL;
for (i = 0; i < 3; i++) {
material->ambient[i] = 0.f;
material->diffuse[i] = 0.f;
@@ -442,16 +450,19 @@ static void InitMaterial(tinyobj_material_t *material) {
material->ior = 1.f;
}
#if 0 /* todo */
static void LoadMtl(std::map<std::string, int> *material_map,
std::vector<material_t> *materials,
std::istream *inStream) {
// Create a default material anyway.
material_t material;
InitMaterial(&material);
static tinyobj_material_t *tinyobj_material_add(tinyobj_material_t *prev, int num_materials, tinyobj_material_t *new_mat)
{
tinyobj_material_t* dst = (tinyobj_material_t*)realloc(prev, sizeof(tinyobj_material_t) * (num_materials + 1));
size_t maxchars = 8192; // Alloc enough size.
std::vector<char> buf(maxchars); // Alloc enough size.
return dst;
}
int tinyobj_parse_mtl(tinyobj_material_t **materials, int *num_materials, const char* buf, size_t len) {
/* Create a default material */
tinyobj_material_t default_material;
initMaterial(&default_material);
#if 0
while (inStream->peek() != -1) {
inStream->getline(&buf[0], static_cast<std::streamsize>(maxchars));
@@ -597,79 +608,67 @@ static void LoadMtl(std::map<std::string, int> *material_map,
// ambient texture
if ((0 == strncmp(token, "map_Ka", 6)) && IS_SPACE(token[6])) {
token += 7;
material.ambient_texname = token;
material.ambient_texname = strdup(token);
continue;
}
// diffuse texture
if ((0 == strncmp(token, "map_Kd", 6)) && IS_SPACE(token[6])) {
token += 7;
material.diffuse_texname = token;
material.diffuse_texname = strdup(token);
continue;
}
// specular texture
if ((0 == strncmp(token, "map_Ks", 6)) && IS_SPACE(token[6])) {
token += 7;
material.specular_texname = token;
material.specular_texname = strdup(token);
continue;
}
// specular highlight texture
if ((0 == strncmp(token, "map_Ns", 6)) && IS_SPACE(token[6])) {
token += 7;
material.specular_highlight_texname = token;
material.specular_highlight_texname = strdup(token);
continue;
}
// bump texture
if ((0 == strncmp(token, "map_bump", 8)) && IS_SPACE(token[8])) {
token += 9;
material.bump_texname = token;
material.bump_texname = strdup(token);
continue;
}
// alpha texture
if ((0 == strncmp(token, "map_d", 5)) && IS_SPACE(token[5])) {
token += 6;
material.alpha_texname = token;
material.alpha_texname = strdup(token);
continue;
}
// bump texture
if ((0 == strncmp(token, "bump", 4)) && IS_SPACE(token[4])) {
token += 5;
material.bump_texname = token;
material.bump_texname = strdup(token);
continue;
}
// displacement texture
if ((0 == strncmp(token, "disp", 4)) && IS_SPACE(token[4])) {
token += 5;
material.displacement_texname = token;
material.displacement_texname = strdup(token);
continue;
}
// unknown parameter
const char *_space = strchr(token, ' ');
if (!_space) {
_space = strchr(token, '\t');
}
if (_space) {
std::ptrdiff_t len = _space - token;
std::string key(token, static_cast<size_t>(len));
std::string value = _space + 1;
material.unknown_parameter.insert(
std::pair<std::string, std::string>(key, value));
}
/* @todo { unknown parameter } */
}
// flush last material.
material_map->insert(std::pair<std::string, int>(
material.name, static_cast<int>(materials->size())));
materials->push_back(material);
}
#endif
return TINYOBJ_SUCCESS;
}
typedef enum {
COMMAND_EMPTY,
COMMAND_V,
@@ -688,12 +687,12 @@ typedef struct {
float nx, ny, nz;
float tx, ty;
/* @todo { Use dynamic array } */
tinyobj_vertex_index_t f[TINYOBJ_MAX_FACES_PER_F_LINE];
int num_f;
/* @todo { Use dynamic array } */
tinyobj_vertex_index_t f[TINYOBJ_MAX_FACES_PER_F_LINE];
int num_f;
int f_num_verts[TINYOBJ_MAX_FACES_PER_F_LINE];
int num_f_num_verts;
int f_num_verts[TINYOBJ_MAX_FACES_PER_F_LINE];
int num_f_num_verts;
const char *group_name;
unsigned int group_name_len;
@@ -708,9 +707,10 @@ typedef struct {
CommandType type;
} Command;
static int parseLine(Command *command, const char *p, size_t p_len, int triangulate) {
static int parseLine(Command *command, const char *p, size_t p_len,
int triangulate) {
char linebuf[4096];
const char *token;
const char *token;
assert(p_len < 4095);
memcpy(linebuf, p, p_len);
@@ -724,11 +724,11 @@ static int parseLine(Command *command, const char *p, size_t p_len, int triangul
skip_space(&token);
assert(token);
if (token[0] == '\0') { /* empty line */
if (token[0] == '\0') { /* empty line */
return 0;
}
if (token[0] == '#') { /* comment line */
if (token[0] == '#') { /* comment line */
return 0;
}
@@ -769,13 +769,12 @@ static int parseLine(Command *command, const char *p, size_t p_len, int triangul
/* face */
if (token[0] == 'f' && IS_SPACE((token[1]))) {
int num_f = 0;
int num_f = 0;
tinyobj_vertex_index_t f[TINYOBJ_MAX_FACES_PER_F_LINE];
tinyobj_vertex_index_t f[TINYOBJ_MAX_FACES_PER_F_LINE];
token += 2;
skip_space(&token);
while (!IS_NEW_LINE(token[0])) {
tinyobj_vertex_index_t vi = parseRawTriple(&token);
skip_space_and_cr(&token);
@@ -787,38 +786,38 @@ static int parseLine(Command *command, const char *p, size_t p_len, int triangul
command->type = COMMAND_F;
if (triangulate) {
int k;
int n = 0;
int k;
int n = 0;
tinyobj_vertex_index_t i0 = f[0];
tinyobj_vertex_index_t i1;
tinyobj_vertex_index_t i2 = f[1];
assert(3 * num_f < TINYOBJ_MAX_FACES_PER_F_LINE);
assert(3 * num_f < TINYOBJ_MAX_FACES_PER_F_LINE);
for (k = 2; k < num_f; k++) {
i1 = i2;
i2 = f[k];
command->f[3*n+0] = i0;
command->f[3*n+1] = i1;
command->f[3*n+2] = i2;
command->f[3 * n + 0] = i0;
command->f[3 * n + 1] = i1;
command->f[3 * n + 2] = i2;
command->f_num_verts[n] = 3;
n++;
n++;
}
command->num_f = 3 * n;
command->num_f_num_verts = n;
command->num_f = 3 * n;
command->num_f_num_verts = n;
} else {
int k = 0;
assert(num_f < TINYOBJ_MAX_FACES_PER_F_LINE);
int k = 0;
assert(num_f < TINYOBJ_MAX_FACES_PER_F_LINE);
for (k = 0; k < num_f; k++) {
command->f[k] = f[k];
}
command->num_f = num_f;
command->f_num_verts[0] = num_f;
command->num_f_num_verts = 1;
command->num_f_num_verts = 1;
}
return 1;
@@ -880,6 +879,26 @@ static int parseLine(Command *command, const char *p, size_t p_len, int triangul
return 0;
}
static char *my_strndup(const char *s, size_t len)
{
char *d;
int slen;
if (len == 0) return NULL;
d = (char *)malloc(len + 1); /* + '\0' */
slen = strlen(s);
if (slen < len) {
memcpy(d, s, slen);
d[slen] = '\0';
} else {
memcpy(d, s, len);
d[len] = '\0';
}
return d;
}
typedef struct {
size_t pos;
size_t len;
@@ -887,66 +906,73 @@ typedef struct {
static int is_line_ending(const char *p, size_t i, size_t end_i) {
if (p[i] == '\0') return 1;
if (p[i] == '\n') return 1; /* this includes \r\n */
if (p[i] == '\n') return 1; /* this includes \r\n */
if (p[i] == '\r') {
if (((i + 1) < end_i) && (p[i + 1] != '\n')) { /* detect only \r case */
if (((i + 1) < end_i) && (p[i + 1] != '\n')) { /* detect only \r case */
return 1;
}
}
return 0;
}
int tinyobj_parse(tinyobj_attrib_t *attrib, tinyobj_shape_t *shapes, size_t *num_shapes, const char *buf, size_t len, unsigned int flags)
{
LineInfo* line_infos = NULL;
Command* commands = NULL;
size_t num_lines = 0;
int tinyobj_parse_obj(tinyobj_attrib_t *attrib, tinyobj_shape_t **shapes,
size_t *num_shapes, const char *buf, size_t len,
unsigned int flags) {
LineInfo *line_infos = NULL;
Command *commands = NULL;
size_t num_lines = 0;
size_t num_v = 0;
size_t num_vn = 0;
size_t num_vt = 0;
size_t num_f = 0;
size_t num_faces = 0;
size_t num_v = 0;
size_t num_vn = 0;
size_t num_vt = 0;
size_t num_f = 0;
size_t num_faces = 0;
if (len < 1) return 0;
if (len < 1) return TINYOBJ_ERROR_INVALID_PARAMETER;
if (attrib == NULL) return TINYOBJ_ERROR_INVALID_PARAMETER;
if (shapes == NULL) return TINYOBJ_ERROR_INVALID_PARAMETER;
if (num_shapes == NULL) return TINYOBJ_ERROR_INVALID_PARAMETER;
if (buf == NULL) return TINYOBJ_ERROR_INVALID_PARAMETER;
tinyobj_attrib_init(attrib);
/* 1. Find '\n' and create line data. */
{
size_t i;
size_t end_idx = len - 1;
size_t prev_pos = 0;
size_t line_no = 0;
size_t i;
size_t end_idx = len - 1;
size_t prev_pos = 0;
size_t line_no = 0;
/* Count # of lines. */
for (i = 0; i < end_idx; i++) { /* Assume last char is '\0' */
/* Count # of lines. */
for (i = 0; i < end_idx; i++) { /* Assume last char is '\0' */
if (is_line_ending(buf, i, end_idx)) {
num_lines++;
}
}
num_lines++;
}
}
if (num_lines == 0) return TINYOBJ_ERROR_EMPTY;
line_infos = (LineInfo*)malloc(sizeof(LineInfo) * num_lines);
line_infos = (LineInfo *)malloc(sizeof(LineInfo) * num_lines);
/* Fill line infoss. */
for (i = 0; i < end_idx; i++) {
/* Fill line infoss. */
for (i = 0; i < end_idx; i++) {
if (is_line_ending(buf, i, end_idx)) {
line_infos[line_no].pos = prev_pos;
line_infos[line_no].len = i - prev_pos;
prev_pos = i + 1;
line_no++;
}
}
line_infos[line_no].pos = prev_pos;
line_infos[line_no].len = i - prev_pos;
prev_pos = i + 1;
line_no++;
}
}
}
commands = (Command*)malloc(sizeof(Command) * num_lines);
commands = (Command *)malloc(sizeof(Command) * num_lines);
/* 2. parse each line */
{
size_t i = 0;
for (i = 0; i < num_lines; i++) {
int ret = parseLine(&commands[i], &buf[line_infos[i].pos],
line_infos[i].len, flags & TINYOBJ_FLAG_TRIANGULATE);
line_infos[i].len, flags & TINYOBJ_FLAG_TRIANGULATE);
if (ret) {
if (commands[i].type == COMMAND_V) {
num_v++;
@@ -956,7 +982,7 @@ int tinyobj_parse(tinyobj_attrib_t *attrib, tinyobj_shape_t *shapes, size_t *num
num_vt++;
} else if (commands[i].type == COMMAND_F) {
num_f += commands[i].num_f;
num_faces++;
num_faces += commands[i].num_f_num_verts;
}
if (commands[i].type == COMMAND_MTLLIB) {
@@ -965,15 +991,14 @@ int tinyobj_parse(tinyobj_attrib_t *attrib, tinyobj_shape_t *shapes, size_t *num
mtllib_i_index = commands->size();
*/
}
}
}
}
/* line_infos are not used anymore. Release memory. */
if (line_infos) {
free(line_infos);
}
if (line_infos) {
free(line_infos);
}
#if 0
@@ -1014,136 +1039,169 @@ int tinyobj_parse(tinyobj_attrib_t *attrib, tinyobj_shape_t *shapes, size_t *num
size_t t_count = 0;
size_t f_count = 0;
size_t face_count = 0;
int material_id = -1; /* -1 = default unknown material. */
int material_id = -1; /* -1 = default unknown material. */
size_t i = 0;
attrib->vertices = (float*)malloc(sizeof(float) * num_v * 3);
attrib->vertices = (float *)malloc(sizeof(float) * num_v * 3);
attrib->num_vertices = num_v;
attrib->normals = (float*)malloc(sizeof(float) * num_vn * 3);
attrib->normals = (float *)malloc(sizeof(float) * num_vn * 3);
attrib->num_normals = num_vn;
attrib->texcoords = (float*)malloc(sizeof(float) * num_vt * 2);
attrib->texcoords = (float *)malloc(sizeof(float) * num_vt * 2);
attrib->num_texcoords = num_vt;
attrib->faces = (tinyobj_vertex_index_t*)malloc(sizeof(tinyobj_vertex_index_t) * num_f);
attrib->faces = (tinyobj_vertex_index_t *)malloc(
sizeof(tinyobj_vertex_index_t) * num_f);
attrib->num_faces = num_f;
attrib->face_num_verts = (int*)malloc(sizeof(int) * num_faces);
attrib->material_ids = (int*)malloc(sizeof(int) * num_faces);
attrib->face_num_verts = (int *)malloc(sizeof(int) * num_faces);
attrib->material_ids = (int *)malloc(sizeof(int) * num_faces);
attrib->num_face_num_verts = num_faces;
for (i = 0; i < num_lines; i++) {
if (commands[i].type == COMMAND_EMPTY) {
continue;
} else if (commands[i].type == COMMAND_USEMTL) {
/* @todo
if (commands[t][i].material_name &&
commands[t][i].material_name_len > 0) {
std::string material_name(commands[t][i].material_name,
commands[t][i].material_name_len);
for (i = 0; i < num_lines; i++) {
if (commands[i].type == COMMAND_EMPTY) {
continue;
} else if (commands[i].type == COMMAND_USEMTL) {
/* @todo
if (commands[t][i].material_name &&
commands[t][i].material_name_len > 0) {
std::string material_name(commands[t][i].material_name,
commands[t][i].material_name_len);
if (material_map.find(material_name) != material_map.end()) {
material_id = material_map[material_name];
} else {
// Assign invalid material ID
material_id = -1;
}
}
*/
} else if (commands[i].type == COMMAND_V) {
attrib->vertices[3 * v_count + 0] = commands[i].vx;
attrib->vertices[3 * v_count + 1] = commands[i].vy;
attrib->vertices[3 * v_count + 2] = commands[i].vz;
v_count++;
} else if (commands[i].type == COMMAND_VN) {
attrib->normals[3 * n_count + 0] = commands[i].nx;
attrib->normals[3 * n_count + 1] = commands[i].ny;
attrib->normals[3 * n_count + 2] = commands[i].nz;
n_count++;
} else if (commands[i].type == COMMAND_VT) {
attrib->texcoords[2 * t_count + 0] = commands[i].tx;
attrib->texcoords[2 * t_count + 1] = commands[i].ty;
t_count++;
} else if (commands[i].type == COMMAND_F) {
size_t k =0;
for (k = 0; k < commands[i].num_f; k++) {
tinyobj_vertex_index_t vi = commands[i].f[k];
int v_idx = fixIndex(vi.v_idx, v_count);
int vn_idx = fixIndex(vi.vn_idx, n_count);
int vt_idx = fixIndex(vi.vt_idx, t_count);
attrib->faces[f_count + k].v_idx = v_idx;
attrib->faces[f_count + k].vn_idx = vn_idx;
attrib->faces[f_count + k].vt_idx = vt_idx;
}
attrib->material_ids[face_count] = material_id;
attrib->face_num_verts[face_count] = commands[i].num_f;
f_count += commands[i].num_f;
face_count++;
if (material_map.find(material_name) != material_map.end()) {
material_id = material_map[material_name];
} else {
// Assign invalid material ID
material_id = -1;
}
}
*/
} else if (commands[i].type == COMMAND_V) {
attrib->vertices[3 * v_count + 0] = commands[i].vx;
attrib->vertices[3 * v_count + 1] = commands[i].vy;
attrib->vertices[3 * v_count + 2] = commands[i].vz;
v_count++;
} else if (commands[i].type == COMMAND_VN) {
attrib->normals[3 * n_count + 0] = commands[i].nx;
attrib->normals[3 * n_count + 1] = commands[i].ny;
attrib->normals[3 * n_count + 2] = commands[i].nz;
n_count++;
} else if (commands[i].type == COMMAND_VT) {
attrib->texcoords[2 * t_count + 0] = commands[i].tx;
attrib->texcoords[2 * t_count + 1] = commands[i].ty;
t_count++;
} else if (commands[i].type == COMMAND_F) {
size_t k = 0;
for (k = 0; k < commands[i].num_f; k++) {
tinyobj_vertex_index_t vi = commands[i].f[k];
int v_idx = fixIndex(vi.v_idx, v_count);
int vn_idx = fixIndex(vi.vn_idx, n_count);
int vt_idx = fixIndex(vi.vt_idx, t_count);
attrib->faces[f_count + k].v_idx = v_idx;
attrib->faces[f_count + k].vn_idx = vn_idx;
attrib->faces[f_count + k].vt_idx = vt_idx;
}
for (k = 0; k < commands[i].num_f_num_verts; k++) {
attrib->material_ids[face_count + k] = material_id;
attrib->face_num_verts[face_count + k] = commands[i].f_num_verts[k];
}
f_count += commands[i].num_f;
face_count += commands[i].num_f_num_verts;
}
}
}
/* 5. Construct shape information. */
{
int face_count = 0;
int face_prev_offset = 0;
size_t i = 0;
for (i = 0; i < num_lines; i++) {
if (commands[i].type == COMMAND_O ||
commands[i].type == COMMAND_G) {
#if 0 /* @todo */
size_t n = 0;
size_t shape_idx = 0;
const char* shape_name = NULL;
int shape_name_len = 0;
const char* prev_shape_name = NULL;
int prev_shape_name_len = 0;
int prev_shape_face_offset = 0;
int prev_shape_length = 0;
int prev_face_offset = 0;
tinyobj_shape_t prev_shape = {NULL, 0, 0};
/* Find the number of shapes in .obj */
for (i = 0; i < num_lines; i++) {
if (commands[i].type == COMMAND_O || commands[i].type == COMMAND_G) {
n++;
}
}
/* Allocate array of shapes with maximum possible size(+1 for unnamed group/object).
* Actual # of shapes found in .obj is determined in the later */
(*shapes) = malloc(sizeof(tinyobj_shape_t) * (n + 1));
for (i = 0; i < num_lines; i++) {
if (commands[i].type == COMMAND_O || commands[i].type == COMMAND_G) {
if (commands[i].type == COMMAND_O) {
name = std::string(commands[t][i].object_name,
commands[t][i].object_name_len);
shape_name = commands[i].object_name;
shape_name_len = commands[i].object_name_len;
} else {
name = std::string(commands[t][i].group_name,
commands[t][i].group_name_len);
shape_name = commands[i].group_name;
shape_name_len = commands[i].group_name_len;
}
if (face_count == 0) {
// 'o' or 'g' appears before any 'f'
shape.name = name;
shape.face_offset = face_count;
face_prev_offset = face_count;
/* 'o' or 'g' appears before any 'f' */
prev_shape_name = shape_name;
prev_shape_name_len = shape_name_len;
prev_shape_face_offset = face_count;
prev_face_offset = face_count;
} else {
if (shapes->size() == 0) {
// 'o' or 'g' after some 'v' lines.
// create a shape with null name
shape.length = face_count - face_prev_offset;
face_prev_offset = face_count;
if (shape_idx == 0) {
/* 'o' or 'g' after some 'v' lines. */
(*shapes)[shape_idx].name = my_strndup(prev_shape_name, prev_shape_name_len); /* may be NULL */
(*shapes)[shape_idx].face_offset = prev_shape.face_offset;
(*shapes)[shape_idx].length = face_count - prev_face_offset;
shape_idx++;
shapes->push_back(shape);
prev_shape_length = face_count - prev_face_offset;
prev_face_offset = face_count;
} else {
if ((face_count - face_prev_offset) > 0) {
// push previous shape
shape.length = face_count - face_prev_offset;
shapes->push_back(shape);
face_prev_offset = face_count;
if ((face_count - prev_face_offset) > 0) {
(*shapes)[shape_idx].name = my_strndup(prev_shape_name, prev_shape_name_len);
(*shapes)[shape_idx].face_offset = prev_face_offset;
(*shapes)[shape_idx].length = face_count - prev_face_offset;
shape_idx++;
prev_shape_length = face_count - prev_face_offset;
prev_face_offset = face_count;
}
}
// redefine shape.
shape.name = name;
shape.face_offset = face_count;
shape.length = 0;
/* Record shape info for succeeding 'o' or 'g' command. */
prev_shape_name = shape_name;
prev_shape_name_len = shape_name_len;
prev_shape_face_offset = face_count;
prev_shape_length = 0;
}
#endif
}
if (commands[i].type == COMMAND_F) {
face_count++;
}
}
if ((face_count - face_prev_offset) > 0) {
#if 0 /* todo */
shape.length = face_count - shape.face_offset;
if (shape.length > 0) {
shapes->push_back(shape);
if (commands[i].type == COMMAND_F) {
face_count++;
}
#endif
} else {
/* Guess no 'v' line occurrence after 'o' or 'g', so discards current shape information. */
}
if ((face_count - prev_face_offset) > 0) {
size_t len = face_count - prev_shape_face_offset;
if (len > 0) {
(*shapes)[shape_idx].name = my_strndup(prev_shape_name, prev_shape_name_len);
(*shapes)[shape_idx].face_offset = prev_face_offset;
(*shapes)[shape_idx].length = face_count - prev_face_offset;
shape_idx++;
}
} else {
/* Guess no 'v' line occurrence after 'o' or 'g', so discards current
* shape information. */
}
(*num_shapes) = shape_idx;
}
if (commands) {
@@ -1152,6 +1210,32 @@ int tinyobj_parse(tinyobj_attrib_t *attrib, tinyobj_shape_t *shapes, size_t *num
return TINYOBJ_SUCCESS;
}
#endif /* TINYOBJ_LOADER_C_IMPLEMENTATION */
#endif /* TINOBJ_LOADER_C_H_ */
void tinyobj_attrib_init(tinyobj_attrib_t *attrib)
{
attrib->vertices = NULL;
attrib->num_vertices = 0;
attrib->normals = NULL;
attrib->num_normals = 0;
attrib->texcoords = NULL;
attrib->num_texcoords = 0;
attrib->faces = NULL;
attrib->num_faces = 0;
attrib->face_num_verts = NULL;
attrib->num_face_num_verts = 0;
attrib->material_ids = NULL;
}
void tinyobj_attrib_free(tinyobj_attrib_t *attrib)
{
if (attrib->vertices) free(attrib->vertices);
if (attrib->normals) free(attrib->normals);
if (attrib->texcoords) free(attrib->texcoords);
if (attrib->faces) free(attrib->faces);
if (attrib->face_num_verts) free(attrib->face_num_verts);
if (attrib->material_ids) free(attrib->material_ids);
}
#endif /* TINYOBJ_LOADER_C_IMPLEMENTATION */
#endif /* TINOBJ_LOADER_C_H_ */

130
experimental/viewer-c.c
View File

@@ -23,8 +23,7 @@ typedef struct {
int numTriangles;
} DrawObject;
static DrawObject gDrawObjects[MAX_OBJECTS];
static int gNumDrawObjects;
static DrawObject gDrawObject;
static int width = 768;
static int height = 768;
@@ -214,7 +213,7 @@ static const char* get_file_data(size_t *len, const char* filename)
static int LoadObjAndConvert(float bmin[3], float bmax[3], const char* filename)
{
tinyobj_attrib_t attrib;
tinyobj_shape_t *shapes;
tinyobj_shape_t *shapes = NULL;
size_t num_shapes;
size_t data_len = 0;
@@ -227,10 +226,19 @@ static int LoadObjAndConvert(float bmin[3], float bmax[3], const char* filename)
{
unsigned int flags = TINYOBJ_FLAG_TRIANGULATE;
int ret = tinyobj_parse(&attrib, shapes, &num_shapes, data, data_len, flags);
int ret = tinyobj_parse_obj(&attrib, &shapes, &num_shapes, data, data_len, flags);
if (ret != TINYOBJ_SUCCESS) {
return 0;
}
printf("# of shapes = %d\n", num_shapes);
{
int i;
for (i = 0; i < num_shapes; i++) {
printf("shape[%d] name = %s\n", i, shapes[i].name);
}
}
}
bmin[0] = bmin[1] = bmin[2] = FLT_MAX;
@@ -238,17 +246,27 @@ static int LoadObjAndConvert(float bmin[3], float bmax[3], const char* filename)
{
DrawObject o;
/* std::vector<float> vb; // pos(3float), normal(3float), color(3float) */
float *vb;
/* std::vector<float> vb; // */
size_t face_offset = 0;
size_t v;
size_t i;
for (v = 0; v < attrib.num_face_num_verts; v++) {
/* Assume triangulated face. */
size_t num_triangles = attrib.num_face_num_verts;
size_t stride = 9; /* 9 = pos(3float), normal(3float), color(3float) */
vb = (float*)malloc(sizeof(float) * stride * num_triangles * 3);
for (i = 0; i < attrib.num_face_num_verts; i++) {
size_t f;
assert(attrib.face_num_verts[v] % 3 == 0); /* assume all triangle faces. */
for (f = 0; f < attrib.face_num_verts[v] / 3; f++) {
assert(attrib.face_num_verts[i] % 3 == 0); /* assume all triangle faces. */
for (f = 0; f < attrib.face_num_verts[i] / 3; f++) {
int k;
float v[3][3];
float n[3][3];
float c[3];
float len2;
tinyobj_vertex_index_t idx0 = attrib.faces[face_offset+3*f+0];
tinyobj_vertex_index_t idx1 = attrib.faces[face_offset+3*f+1];
tinyobj_vertex_index_t idx2 = attrib.faces[face_offset+3*f+2];
@@ -272,21 +290,24 @@ static int LoadObjAndConvert(float bmin[3], float bmax[3], const char* filename)
bmax[k] = (v[2][k] > bmax[k]) ? v[2][k] : bmax[k];
}
if (attrib.normals) {
if (attrib.num_normals > 0) {
int f0 = idx0.vn_idx;
int f1 = idx1.vn_idx;
int f2 = idx2.vn_idx;
assert(f0 >= 0);
assert(f1 >= 0);
assert(f2 >= 0);
assert(3*f0+2 < attrib.num_normals);
assert(3*f1+2 < attrib.num_normals);
assert(3*f2+2 < attrib.num_normals);
for (k = 0; k < 3; k++) {
n[0][k] = attrib.normals[3*f0+k];
n[1][k] = attrib.normals[3*f1+k];
n[2][k] = attrib.normals[3*f2+k];
if (f0 >=0 && f1 >= 0 && f2 >= 0) {
assert(3*f0+2 < attrib.num_normals);
assert(3*f1+2 < attrib.num_normals);
assert(3*f2+2 < attrib.num_normals);
for (k = 0; k < 3; k++) {
n[0][k] = attrib.normals[3*f0+k];
n[1][k] = attrib.normals[3*f1+k];
n[2][k] = attrib.normals[3*f2+k];
}
} else { /* normal index is not defined for this face */
/* compute geometric normal */
CalcNormal(n[0], v[0], v[1], v[2]);
n[1][0] = n[0][0]; n[1][1] = n[0][1]; n[1][2] = n[0][2];
n[2][0] = n[0][0]; n[2][1] = n[0][1]; n[2][2] = n[0][2];
}
} else {
/* compute geometric normal */
@@ -296,17 +317,14 @@ static int LoadObjAndConvert(float bmin[3], float bmax[3], const char* filename)
}
for (k = 0; k < 3; k++) {
#if 0
vb.push_back(v[k][0]);
vb.push_back(v[k][1]);
vb.push_back(v[k][2]);
vb.push_back(n[k][0]);
vb.push_back(n[k][1]);
vb.push_back(n[k][2]);
#endif
vb[(3 * i + k) * stride + 0] = v[k][0];
vb[(3 * i + k) * stride + 1] = v[k][1];
vb[(3 * i + k) * stride + 2] = v[k][2];
vb[(3 * i + k) * stride + 3] = n[k][0];
vb[(3 * i + k) * stride + 4] = n[k][1];
vb[(3 * i + k) * stride + 5] = n[k][2];
/* Use normal as color. */
float c[3];
float len2;
c[0] = n[k][0];
c[1] = n[k][1];
c[2] = n[k][2];
@@ -318,33 +336,34 @@ static int LoadObjAndConvert(float bmin[3], float bmax[3], const char* filename)
c[1] /= len;
c[2] /= len;
}
#if 0
vb.push_back(c[0] * 0.5 + 0.5);
vb.push_back(c[1] * 0.5 + 0.5);
vb.push_back(c[2] * 0.5 + 0.5);
#endif
vb[(3 * i + k) * stride + 6] = (c[0] * 0.5 + 0.5);
vb[(3 * i + k) * stride + 7] = (c[1] * 0.5 + 0.5);
vb[(3 * i + k) * stride + 8] = (c[2] * 0.5 + 0.5);
}
}
face_offset += attrib.face_num_verts[v];
face_offset += attrib.face_num_verts[i];
}
o.vb = 0;
o.numTriangles = 0;
#if 0 /* @todo */
if (vb.size() > 0) {
if (num_triangles > 0) {
glGenBuffers(1, &o.vb);
glBindBuffer(GL_ARRAY_BUFFER, o.vb);
glBufferData(GL_ARRAY_BUFFER, vb.size() * sizeof(float), &vb.at(0), GL_STATIC_DRAW);
o.numTriangles = vb.size() / 9 / 3;
glBufferData(GL_ARRAY_BUFFER, num_triangles * 3 * stride * sizeof(float), vb, GL_STATIC_DRAW);
o.numTriangles = num_triangles;
}
gDrawObjects.push_back(o);
#endif
free(vb);
gDrawObject = o;
}
printf("bmin = %f, %f, %f\n", bmin[0], bmin[1], bmin[2]);
printf("bmax = %f, %f, %f\n", bmax[0], bmax[1], bmax[2]);
tinyobj_attrib_free(&attrib);
return 1;
}
@@ -437,7 +456,7 @@ static void motionFunc(GLFWwindow* window, double mouse_x, double mouse_y){
prevMouseY = (float)mouse_y;
}
static void Draw(const DrawObject* draw_objects, int num_draw_objects)
static void Draw(const DrawObject* draw_object)
{
int i;
@@ -447,13 +466,8 @@ static void Draw(const DrawObject* draw_objects, int num_draw_objects)
glEnable(GL_POLYGON_OFFSET_FILL);
glPolygonOffset(1.0, 1.0);
glColor3f(1.0f, 1.0f, 1.0f);
for (i = 0; i < num_draw_objects; i++) {
const DrawObject o = draw_objects[i];
if (o.vb < 1) {
continue;
}
glBindBuffer(GL_ARRAY_BUFFER, o.vb);
if (draw_object->vb >= 1) {
glBindBuffer(GL_ARRAY_BUFFER, draw_object->vb);
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_NORMAL_ARRAY);
glEnableClientState(GL_COLOR_ARRAY);
@@ -461,7 +475,7 @@ static void Draw(const DrawObject* draw_objects, int num_draw_objects)
glNormalPointer(GL_FLOAT, 36, (const void*)(sizeof(float)*3));
glColorPointer(3, GL_FLOAT, 36, (const void*)(sizeof(float)*6));
glDrawArrays(GL_TRIANGLES, 0, 3 * o.numTriangles);
glDrawArrays(GL_TRIANGLES, 0, 3 * draw_object->numTriangles);
CheckErrors("drawarrays");
}
@@ -471,20 +485,16 @@ static void Draw(const DrawObject* draw_objects, int num_draw_objects)
glPolygonMode(GL_BACK, GL_LINE);
glColor3f(0.0f, 0.0f, 0.4f);
for (i = 0; i < num_draw_objects; i++) {
DrawObject o = draw_objects[i];
if (o.vb < 1) {
continue;
}
glBindBuffer(GL_ARRAY_BUFFER, o.vb);
if (draw_object->vb >= 1) {
glBindBuffer(GL_ARRAY_BUFFER, draw_object->vb);
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_NORMAL_ARRAY);
glDisableClientState(GL_COLOR_ARRAY);
glVertexPointer(3, GL_FLOAT, 36, (const void*)0);
glNormalPointer(GL_FLOAT, 36, (const void*)(sizeof(float)*3));
glDrawArrays(GL_TRIANGLES, 0, 3 * o.numTriangles);
glDrawArrays(GL_TRIANGLES, 0, 3 * draw_object->numTriangles);
CheckErrors("drawarrays");
}
}
@@ -582,7 +592,7 @@ int main(int argc, char **argv)
/* Centerize object. */
glTranslatef(-0.5f*(bmax[0] + bmin[0]), -0.5f*(bmax[1] + bmin[1]), -0.5f*(bmax[2] + bmin[2]));
Draw(gDrawObjects, gNumDrawObjects);
Draw(&gDrawObject);
glfwSwapBuffers(gWindow);
}