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Remove some invalid comments. Fix calling index_cb per f line. Fixes #87.

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This commit is contained in:
Syoyo Fujita
2016-07-27 00:02:53 +09:00
parent 22883def8d
commit d496d8eab6
2 changed files with 82 additions and 68 deletions
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103
examples/callback_api/main.cc
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@@ -1,29 +1,34 @@
//
// An example of how to use callback API.
// This example is minimum and incomplete. Just showing the usage of callback
// API.
// You need to implement your own Mesh data struct constrution based on this
// example in practical.
//
#define TINYOBJLOADER_IMPLEMENTATION
#include "tiny_obj_loader.h"
#include <cassert>
#include <cstdio>
#include <cstdlib>
#include <cassert>
#include <fstream>
#include <iostream>
#include <sstream>
#include <fstream>
typedef struct
{
typedef struct {
std::vector<float> vertices;
std::vector<float> normals;
std::vector<float> texcoords;
std::vector<int> v_indices;
std::vector<int> vn_indices;
std::vector<int> vt_indices;
std::vector<int> v_indices;
std::vector<int> vn_indices;
std::vector<int> vt_indices;
std::vector<tinyobj::material_t> materials;
} MyMesh;
void vertex_cb(void *user_data, float x, float y, float z)
{
MyMesh *mesh = reinterpret_cast<MyMesh*>(user_data);
void vertex_cb(void *user_data, float x, float y, float z) {
MyMesh *mesh = reinterpret_cast<MyMesh *>(user_data);
printf("v[%ld] = %f, %f, %f\n", mesh->vertices.size() / 3, x, y, z);
mesh->vertices.push_back(x);
@@ -31,9 +36,8 @@ void vertex_cb(void *user_data, float x, float y, float z)
mesh->vertices.push_back(z);
}
void normal_cb(void *user_data, float x, float y, float z)
{
MyMesh *mesh = reinterpret_cast<MyMesh*>(user_data);
void normal_cb(void *user_data, float x, float y, float z) {
MyMesh *mesh = reinterpret_cast<MyMesh *>(user_data);
printf("vn[%ld] = %f, %f, %f\n", mesh->normals.size() / 3, x, y, z);
mesh->normals.push_back(x);
@@ -41,49 +45,55 @@ void normal_cb(void *user_data, float x, float y, float z)
mesh->normals.push_back(z);
}
void texcoord_cb(void *user_data, float x, float y)
{
MyMesh *mesh = reinterpret_cast<MyMesh*>(user_data);
void texcoord_cb(void *user_data, float x, float y) {
MyMesh *mesh = reinterpret_cast<MyMesh *>(user_data);
printf("vt[%ld] = %f, %f\n", mesh->texcoords.size() / 2, x, y);
mesh->texcoords.push_back(x);
mesh->texcoords.push_back(y);
}
void index_cb(void *user_data, int v_idx, int vn_idx, int vt_idx)
{
// NOTE: the value of each index is raw value.
void index_cb(void *user_data, tinyobj::index_t *indices, int num_indices) {
// NOTE: the value of each index is raw value.
// For example, the application must manually adjust the index with offset
// (e.g. v_indices.size()) when the value is negative(relative index).
// (e.g. v_indices.size()) when the value is negative(whic means relative
// index).
// Also, the first index starts with 1, not 0.
// See fixIndex() function in tiny_obj_loader.h for details.
// Also, -2147483648(0x80000000) is set for the index value which does not exist in .obj
MyMesh *mesh = reinterpret_cast<MyMesh*>(user_data);
printf("idx[%ld] = %d, %d, %d\n", mesh->v_indices.size(), v_idx, vn_idx, vt_idx);
// Also, -2147483648(0x80000000 = -INT_MAX) is set for the index value which
// does not exist in .obj
MyMesh *mesh = reinterpret_cast<MyMesh *>(user_data);
if (v_idx != 0x80000000) {
mesh->v_indices.push_back(v_idx);
}
if (vn_idx != 0x80000000) {
mesh->vn_indices.push_back(vn_idx);
}
if (vt_idx != 0x80000000) {
mesh->vt_indices.push_back(vt_idx);
for (int i = 0; i < num_indices; i++) {
tinyobj::index_t idx = indices[i];
printf("idx[%ld] = %d, %d, %d\n", mesh->v_indices.size(), idx.vertex_index,
idx.normal_index, idx.texcoord_index);
if (idx.vertex_index != 0x80000000) {
mesh->v_indices.push_back(idx.vertex_index);
}
if (idx.normal_index != 0x80000000) {
mesh->vn_indices.push_back(idx.normal_index);
}
if (idx.texcoord_index != 0x80000000) {
mesh->vt_indices.push_back(idx.texcoord_index);
}
}
}
void usemtl_cb(void *user_data, const char* name, int material_idx)
{
MyMesh *mesh = reinterpret_cast<MyMesh*>(user_data);
void usemtl_cb(void *user_data, const char *name, int material_idx) {
MyMesh *mesh = reinterpret_cast<MyMesh *>(user_data);
if ((material_idx > -1) && (material_idx < mesh->materials.size())) {
printf("usemtl. material id = %d(name = %s)\n", material_idx, mesh->materials[material_idx].name.c_str());
printf("usemtl. material id = %d(name = %s)\n", material_idx,
mesh->materials[material_idx].name.c_str());
} else {
printf("usemtl. name = %s\n", name);
}
}
void mtllib_cb(void *user_data, const tinyobj::material_t *materials, int num_materials)
{
MyMesh *mesh = reinterpret_cast<MyMesh*>(user_data);
void mtllib_cb(void *user_data, const tinyobj::material_t *materials,
int num_materials) {
MyMesh *mesh = reinterpret_cast<MyMesh *>(user_data);
printf("mtllib. # of materials = %d\n", num_materials);
for (int i = 0; i < num_materials; i++) {
@@ -91,9 +101,8 @@ void mtllib_cb(void *user_data, const tinyobj::material_t *materials, int num_ma
}
}
void group_cb(void *user_data, const char **names, int num_names)
{
//MyMesh *mesh = reinterpret_cast<MyMesh*>(user_data);
void group_cb(void *user_data, const char **names, int num_names) {
// MyMesh *mesh = reinterpret_cast<MyMesh*>(user_data);
printf("group : name = \n");
for (int i = 0; i < num_names; i++) {
@@ -101,16 +110,12 @@ void group_cb(void *user_data, const char **names, int num_names)
}
}
void object_cb(void *user_data, const char *name)
{
//MyMesh *mesh = reinterpret_cast<MyMesh*>(user_data);
void object_cb(void *user_data, const char *name) {
// MyMesh *mesh = reinterpret_cast<MyMesh*>(user_data);
printf("object : name = %s\n", name);
}
int
main(int argc, char** argv)
{
int main(int argc, char **argv) {
tinyobj::callback_t cb;
cb.vertex_cb = vertex_cb;
cb.normal_cb = normal_cb;
@@ -131,7 +136,7 @@ main(int argc, char** argv)
}
tinyobj::MaterialFileReader mtlReader("../../models/");
bool ret = tinyobj::LoadObjWithCallback(&mesh, cb, &err, &ifs, &mtlReader);
if (!err.empty()) {