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tinygltf/loader_example.cc
Syoyo Fujita 8c5ab0344f Initial support of animation.
2016-06-19 18:16:10 +09:00

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#define TINYGLTF_LOADER_IMPLEMENTATION
#define STB_IMAGE_IMPLEMENTATION
#include "tiny_gltf_loader.h"
#include <cstdio>
#include <fstream>
#include <iostream>
static std::string GetFilePathExtension(const std::string &FileName) {
if (FileName.find_last_of(".") != std::string::npos)
return FileName.substr(FileName.find_last_of(".") + 1);
return "";
}
static std::string PrintMode(int mode) {
if (mode == TINYGLTF_MODE_POINTS) {
return "POINTS";
} else if (mode == TINYGLTF_MODE_LINE) {
return "LINE";
} else if (mode == TINYGLTF_MODE_LINE_LOOP) {
return "LINE_LOOP";
} else if (mode == TINYGLTF_MODE_TRIANGLES) {
return "TRIANGLES";
} else if (mode == TINYGLTF_MODE_TRIANGLE_FAN) {
return "TRIANGLE_FAN";
} else if (mode == TINYGLTF_MODE_TRIANGLE_STRIP) {
return "TRIANGLE_STRIP";
}
return "**UNKNOWN**";
}
static std::string PrintTarget(int target) {
if (target == 34962) {
return "GL_ARRAY_BUFFER";
} else if (target == 34963) {
return "GL_ELEMENT_ARRAY_BUFFER";
} else {
return "**UNKNOWN**";
}
}
static std::string PrintType(int ty) {
if (ty == TINYGLTF_TYPE_SCALAR) {
return "SCALAR";
} else if (ty == TINYGLTF_TYPE_VECTOR) {
return "VECTOR";
} else if (ty == TINYGLTF_TYPE_VEC2) {
return "VEC2";
} else if (ty == TINYGLTF_TYPE_VEC3) {
return "VEC3";
} else if (ty == TINYGLTF_TYPE_VEC4) {
return "VEC4";
} else if (ty == TINYGLTF_TYPE_MATRIX) {
return "MATRIX";
} else if (ty == TINYGLTF_TYPE_MAT2) {
return "MAT2";
} else if (ty == TINYGLTF_TYPE_MAT3) {
return "MAT3";
} else if (ty == TINYGLTF_TYPE_MAT4) {
return "MAT4";
}
return "**UNKNOWN**";
}
static std::string PrintShaderType(int ty) {
if (ty == TINYGLTF_SHADER_TYPE_VERTEX_SHADER) {
return "VERTEX_SHADER";
} else if (ty == TINYGLTF_SHADER_TYPE_FRAGMENT_SHADER) {
return "FRAGMENT_SHADER";
}
return "**UNKNOWN**";
}
static std::string PrintComponentType(int ty) {
if (ty == TINYGLTF_COMPONENT_TYPE_BYTE) {
return "BYTE";
} else if (ty == TINYGLTF_COMPONENT_TYPE_UNSIGNED_BYTE) {
return "UNSIGNED_BYTE";
} else if (ty == TINYGLTF_COMPONENT_TYPE_SHORT) {
return "SHORT";
} else if (ty == TINYGLTF_COMPONENT_TYPE_UNSIGNED_SHORT) {
return "UNSIGNED_SHORT";
} else if (ty == TINYGLTF_COMPONENT_TYPE_INT) {
return "INT";
} else if (ty == TINYGLTF_COMPONENT_TYPE_UNSIGNED_INT) {
return "UNSIGNED_INT";
} else if (ty == TINYGLTF_COMPONENT_TYPE_FLOAT) {
return "FLOAT";
} else if (ty == TINYGLTF_COMPONENT_TYPE_DOUBLE) {
return "DOUBLE";
}
return "**UNKNOWN**";
}
static std::string PrintParameterType(int ty) {
if (ty == TINYGLTF_PARAMETER_TYPE_BYTE) {
return "BYTE";
} else if (ty == TINYGLTF_PARAMETER_TYPE_UNSIGNED_BYTE) {
return "UNSIGNED_BYTE";
} else if (ty == TINYGLTF_PARAMETER_TYPE_SHORT) {
return "SHORT";
} else if (ty == TINYGLTF_PARAMETER_TYPE_UNSIGNED_SHORT) {
return "UNSIGNED_SHORT";
} else if (ty == TINYGLTF_PARAMETER_TYPE_INT) {
return "INT";
} else if (ty == TINYGLTF_PARAMETER_TYPE_UNSIGNED_INT) {
return "UNSIGNED_INT";
} else if (ty == TINYGLTF_PARAMETER_TYPE_FLOAT) {
return "FLOAT";
} else if (ty == TINYGLTF_PARAMETER_TYPE_FLOAT_VEC2) {
return "FLOAT_VEC2";
} else if (ty == TINYGLTF_PARAMETER_TYPE_FLOAT_VEC3) {
return "FLOAT_VEC3";
} else if (ty == TINYGLTF_PARAMETER_TYPE_FLOAT_VEC4) {
return "FLOAT_VEC4";
} else if (ty == TINYGLTF_PARAMETER_TYPE_INT_VEC2) {
return "INT_VEC2";
} else if (ty == TINYGLTF_PARAMETER_TYPE_INT_VEC3) {
return "INT_VEC3";
} else if (ty == TINYGLTF_PARAMETER_TYPE_INT_VEC4) {
return "INT_VEC4";
} else if (ty == TINYGLTF_PARAMETER_TYPE_BOOL) {
return "BOOL";
} else if (ty == TINYGLTF_PARAMETER_TYPE_BOOL_VEC2) {
return "BOOL_VEC2";
} else if (ty == TINYGLTF_PARAMETER_TYPE_BOOL_VEC3) {
return "BOOL_VEC3";
} else if (ty == TINYGLTF_PARAMETER_TYPE_BOOL_VEC4) {
return "BOOL_VEC4";
} else if (ty == TINYGLTF_PARAMETER_TYPE_FLOAT_MAT2) {
return "FLOAT_MAT2";
} else if (ty == TINYGLTF_PARAMETER_TYPE_FLOAT_MAT3) {
return "FLOAT_MAT3";
} else if (ty == TINYGLTF_PARAMETER_TYPE_FLOAT_MAT4) {
return "FLOAT_MAT4";
} else if (ty == TINYGLTF_PARAMETER_TYPE_SAMPLER_2D) {
return "SAMPLER_2D";
}
return "**UNKNOWN**";
}
static std::string PrintFloatArray(const std::vector<double> &arr) {
if (arr.size() == 0) {
return "";
}
std::stringstream ss;
ss << "[ ";
for (size_t i = 0; i < arr.size(); i++) {
ss << arr[i] << ((i != arr.size() - 1) ? ", " : "");
}
ss << " ]";
return ss.str();
}
static std::string PrintStringArray(const std::vector<std::string> &arr) {
if (arr.size() == 0) {
return "";
}
std::stringstream ss;
ss << "[ ";
for (size_t i = 0; i < arr.size(); i++) {
ss << arr[i] << ((i != arr.size() - 1) ? ", " : "");
}
ss << " ]";
return ss.str();
}
static std::string Indent(int indent) {
std::string s;
for (int i = 0; i < indent; i++) {
s += " ";
}
return s;
}
static std::string PrintParameterValue(const tinygltf::Parameter &param) {
if (!param.number_array.empty()) {
return PrintFloatArray(param.number_array);
} else {
return param.string_value;
}
}
static void DumpNode(const tinygltf::Node &node, int indent) {
std::cout << Indent(indent) << "name : " << node.name << std::endl;
std::cout << Indent(indent) << "camera : " << node.camera << std::endl;
if (!node.rotation.empty()) {
std::cout << Indent(indent)
<< "rotation : " << PrintFloatArray(node.rotation)
<< std::endl;
}
if (!node.scale.empty()) {
std::cout << Indent(indent)
<< "scale : " << PrintFloatArray(node.scale) << std::endl;
}
if (!node.translation.empty()) {
std::cout << Indent(indent)
<< "translation : " << PrintFloatArray(node.translation)
<< std::endl;
}
if (!node.matrix.empty()) {
std::cout << Indent(indent)
<< "matrix : " << PrintFloatArray(node.matrix) << std::endl;
}
std::cout << Indent(indent)
<< "meshes : " << PrintStringArray(node.meshes) << std::endl;
std::cout << Indent(indent)
<< "children : " << PrintStringArray(node.children) << std::endl;
}
static void DumpStringMap(const std::map<std::string, std::string> &map,
int indent) {
std::map<std::string, std::string>::const_iterator it(map.begin());
std::map<std::string, std::string>::const_iterator itEnd(map.end());
for (; it != itEnd; it++) {
std::cout << Indent(indent) << it->first << ": " << it->second << std::endl;
}
}
static void DumpPrimitive(const tinygltf::Primitive &primitive, int indent) {
std::cout << Indent(indent) << "material : " << primitive.material
<< std::endl;
std::cout << Indent(indent) << "indices : " << primitive.indices << std::endl;
std::cout << Indent(indent) << "mode : " << PrintMode(primitive.mode)
<< "(" << primitive.mode << ")" << std::endl;
std::cout << Indent(indent)
<< "attributes(items=" << primitive.attributes.size() << ")"
<< std::endl;
DumpStringMap(primitive.attributes, indent + 1);
}
static void DumpTechniqueParameter(const tinygltf::TechniqueParameter &param,
int indent) {
std::cout << Indent(indent) << "count : " << param.count << std::endl;
std::cout << Indent(indent) << "node : " << param.node << std::endl;
std::cout << Indent(indent) << "semantic : " << param.semantic << std::endl;
std::cout << Indent(indent) << "type : " << PrintParameterType(param.type)
<< std::endl;
std::cout << Indent(indent)
<< "value : " << PrintParameterValue(param.value) << std::endl;
}
static void Dump(const tinygltf::Scene &scene) {
std::cout << "=== Dump glTF ===" << std::endl;
std::cout << "asset.generator : " << scene.asset.generator
<< std::endl;
std::cout << "asset.premultipliedAlpha : " << scene.asset.premultipliedAlpha
<< std::endl;
std::cout << "asset.version : " << scene.asset.version
<< std::endl;
std::cout << "asset.profile.api : " << scene.asset.profile_api
<< std::endl;
std::cout << "asset.profile.version : " << scene.asset.profile_version
<< std::endl;
std::cout << std::endl;
std::cout << "=== Dump scene ===" << std::endl;
std::cout << "defaultScene: " << scene.defaultScene << std::endl;
{
std::map<std::string, std::vector<std::string> >::const_iterator it(
scene.scenes.begin());
std::map<std::string, std::vector<std::string> >::const_iterator itEnd(
scene.scenes.end());
std::cout << "scenes(items=" << scene.scenes.size() << ")" << std::endl;
for (; it != itEnd; it++) {
std::cout << Indent(1) << "name : " << it->first << std::endl;
std::cout << Indent(2) << "nodes : [ ";
for (size_t i = 0; i < it->second.size(); i++) {
std::cout << it->second[i]
<< ((i != (it->second.size() - 1)) ? ", " : "");
}
std::cout << " ] " << std::endl;
}
}
{
std::map<std::string, tinygltf::Mesh>::const_iterator it(
scene.meshes.begin());
std::map<std::string, tinygltf::Mesh>::const_iterator itEnd(
scene.meshes.end());
std::cout << "meshes(item=" << scene.meshes.size() << ")" << std::endl;
for (; it != itEnd; it++) {
std::cout << Indent(1) << "name : " << it->second.name << std::endl;
std::cout << Indent(1)
<< "primitives(items=" << it->second.primitives.size()
<< "): " << std::endl;
for (size_t i = 0; i < it->second.primitives.size(); i++) {
DumpPrimitive(it->second.primitives[i], 2);
}
}
}
{
std::map<std::string, tinygltf::Accessor>::const_iterator it(
scene.accessors.begin());
std::map<std::string, tinygltf::Accessor>::const_iterator itEnd(
scene.accessors.end());
std::cout << "accessors(items=" << scene.accessors.size() << ")"
<< std::endl;
for (; it != itEnd; it++) {
std::cout << Indent(1) << "name : " << it->first << std::endl;
std::cout << Indent(2) << "bufferView : " << it->second.bufferView
<< std::endl;
std::cout << Indent(2) << "byteOffset : " << it->second.byteOffset
<< std::endl;
std::cout << Indent(2) << "byteStride : " << it->second.byteStride
<< std::endl;
std::cout << Indent(2) << "componentType: "
<< PrintComponentType(it->second.componentType) << "("
<< it->second.componentType << ")" << std::endl;
std::cout << Indent(2) << "count : " << it->second.count
<< std::endl;
std::cout << Indent(2) << "type : " << PrintType(it->second.type)
<< std::endl;
if (!it->second.minValues.empty()) {
std::cout << Indent(2) << "min : [";
for (size_t i = 0; i < it->second.minValues.size(); i++) {
std::cout << it->second.minValues[i]
<< ((i != it->second.minValues.size() - 1) ? ", " : "");
}
std::cout << "]" << std::endl;
}
if (!it->second.maxValues.empty()) {
std::cout << Indent(2) << "max : [";
for (size_t i = 0; i < it->second.maxValues.size(); i++) {
std::cout << it->second.maxValues[i]
<< ((i != it->second.maxValues.size() - 1) ? ", " : "");
}
std::cout << "]" << std::endl;
}
}
}
{
std::map<std::string, tinygltf::Animation>::const_iterator it(
scene.animations.begin());
std::map<std::string, tinygltf::Animation>::const_iterator itEnd(
scene.animations.end());
std::cout << "animations(items=" << scene.animations.size() << ")"
<< std::endl;
for (; it != itEnd; it++) {
std::cout << Indent(1) << "name : " << it->first << std::endl;
std::cout << Indent(1) << "channels : [ " << std::endl;
for (size_t i = 0; i < it->second.channels.size(); i++) {
std::cout << Indent(2)
<< "sampler : " << it->second.channels[i].sampler
<< std::endl;
std::cout << Indent(2)
<< "target.id : " << it->second.channels[i].target_id
<< std::endl;
std::cout << Indent(2)
<< "target.path : " << it->second.channels[i].target_path
<< std::endl;
std::cout << ((i != (it->second.channels.size() - 1)) ? " , " : "");
}
std::cout << " ]" << std::endl;
std::map<std::string, tinygltf::AnimationSampler>::const_iterator
samplerIt(it->second.samplers.begin());
std::map<std::string, tinygltf::AnimationSampler>::const_iterator
samplerItEnd(it->second.samplers.end());
std::cout << Indent(1) << "samplers(items=" << it->second.samplers.size()
<< ")" << std::endl;
for (; samplerIt != samplerItEnd; samplerIt++) {
std::cout << Indent(1) << "name : " << samplerIt->first
<< std::endl;
std::cout << Indent(2) << "input : " << samplerIt->second.input
<< std::endl;
std::cout << Indent(2)
<< "interpolation : " << samplerIt->second.interpolation
<< std::endl;
std::cout << Indent(2) << "output : " << samplerIt->second.output
<< std::endl;
}
{
std::cout << Indent(1)
<< "parameters(items=" << it->second.parameters.size() << ")"
<< std::endl;
tinygltf::ParameterMap::const_iterator p(it->second.parameters.begin());
tinygltf::ParameterMap::const_iterator pEnd(
it->second.parameters.end());
for (; p != pEnd; p++) {
std::cout << Indent(2) << p->first << ": "
<< PrintParameterValue(p->second) << std::endl;
}
}
}
}
{
std::map<std::string, tinygltf::BufferView>::const_iterator it(
scene.bufferViews.begin());
std::map<std::string, tinygltf::BufferView>::const_iterator itEnd(
scene.bufferViews.end());
std::cout << "bufferViews(items=" << scene.bufferViews.size() << ")"
<< std::endl;
for (; it != itEnd; it++) {
std::cout << Indent(1) << "name : " << it->first << std::endl;
std::cout << Indent(2) << "buffer : " << it->second.buffer
<< std::endl;
std::cout << Indent(2) << "byteLength : " << it->second.byteLength
<< std::endl;
std::cout << Indent(2) << "byteOffset : " << it->second.byteOffset
<< std::endl;
std::cout << Indent(2)
<< "target : " << PrintTarget(it->second.target)
<< std::endl;
}
}
{
std::map<std::string, tinygltf::Buffer>::const_iterator it(
scene.buffers.begin());
std::map<std::string, tinygltf::Buffer>::const_iterator itEnd(
scene.buffers.end());
std::cout << "buffers(items=" << scene.buffers.size() << ")" << std::endl;
for (; it != itEnd; it++) {
std::cout << Indent(1) << "name : " << it->first << std::endl;
std::cout << Indent(2) << "byteLength : " << it->second.data.size()
<< std::endl;
}
}
{
std::map<std::string, tinygltf::Material>::const_iterator it(
scene.materials.begin());
std::map<std::string, tinygltf::Material>::const_iterator itEnd(
scene.materials.end());
std::cout << "materials(items=" << scene.materials.size() << ")"
<< std::endl;
for (; it != itEnd; it++) {
std::cout << Indent(1) << "name : " << it->first << std::endl;
std::cout << Indent(1) << "technique : " << it->second.technique
<< std::endl;
std::cout << Indent(1) << "values(items=" << it->second.values.size()
<< ")" << std::endl;
tinygltf::ParameterMap::const_iterator p(it->second.values.begin());
tinygltf::ParameterMap::const_iterator pEnd(it->second.values.end());
for (; p != pEnd; p++) {
std::cout << Indent(2) << p->first << ": "
<< PrintParameterValue(p->second) << std::endl;
}
}
}
{
std::map<std::string, tinygltf::Node>::const_iterator it(
scene.nodes.begin());
std::map<std::string, tinygltf::Node>::const_iterator itEnd(
scene.nodes.end());
std::cout << "nodes(items=" << scene.nodes.size() << ")" << std::endl;
for (; it != itEnd; it++) {
std::cout << Indent(1) << "name : " << it->first << std::endl;
DumpNode(it->second, 2);
}
}
{
std::map<std::string, tinygltf::Image>::const_iterator it(
scene.images.begin());
std::map<std::string, tinygltf::Image>::const_iterator itEnd(
scene.images.end());
std::cout << "images(items=" << scene.images.size() << ")" << std::endl;
for (; it != itEnd; it++) {
std::cout << Indent(1) << "name : " << it->first << std::endl;
std::cout << Indent(2) << "width : " << it->second.width << std::endl;
std::cout << Indent(2) << "height : " << it->second.height
<< std::endl;
std::cout << Indent(2) << "component : " << it->second.component
<< std::endl;
std::cout << Indent(2) << "name : " << it->second.name << std::endl;
}
}
{
std::map<std::string, tinygltf::Texture>::const_iterator it(
scene.textures.begin());
std::map<std::string, tinygltf::Texture>::const_iterator itEnd(
scene.textures.end());
std::cout << "textures(items=" << scene.textures.size() << ")" << std::endl;
for (; it != itEnd; it++) {
std::cout << Indent(1) << "name : " << it->first << std::endl;
std::cout << Indent(1) << "format : " << it->second.format
<< std::endl;
std::cout << Indent(1) << "internalFormat : " << it->second.internalFormat
<< std::endl;
std::cout << Indent(1) << "sampler : " << it->second.sampler
<< std::endl;
std::cout << Indent(1) << "source : " << it->second.source
<< std::endl;
std::cout << Indent(1) << "target : " << it->second.target
<< std::endl;
std::cout << Indent(1) << "type : " << it->second.type
<< std::endl;
}
}
{
std::map<std::string, tinygltf::Shader>::const_iterator it(
scene.shaders.begin());
std::map<std::string, tinygltf::Shader>::const_iterator itEnd(
scene.shaders.end());
std::cout << "shaders(items=" << scene.shaders.size() << ")" << std::endl;
for (; it != itEnd; it++) {
std::cout << Indent(1) << "name (id) : " << it->first << std::endl;
std::cout << Indent(2)
<< "type : " << PrintShaderType(it->second.type)
<< std::endl;
std::cout << Indent(2) << "name (json) : " << it->second.name
<< std::endl;
// Indent shader source nicely.
std::string shader_source(Indent(3));
shader_source.resize(shader_source.size() + it->second.source.size());
std::vector<unsigned char>::const_iterator sourceIt(
it->second.source.begin());
std::vector<unsigned char>::const_iterator sourceItEnd(
it->second.source.end());
for (; sourceIt != sourceItEnd; ++sourceIt) {
shader_source += *sourceIt;
if (*sourceIt == '\n') {
shader_source += Indent(3);
}
}
std::cout << Indent(2) << "source :\n"
<< shader_source << std::endl;
}
}
{
std::map<std::string, tinygltf::Program>::const_iterator it(
scene.programs.begin());
std::map<std::string, tinygltf::Program>::const_iterator itEnd(
scene.programs.end());
std::cout << "programs(items=" << scene.programs.size() << ")" << std::endl;
for (; it != itEnd; it++) {
std::cout << Indent(1) << "name : " << it->first << std::endl;
std::cout << Indent(2) << "vertexShader : " << it->second.vertexShader
<< std::endl;
std::cout << Indent(2) << "fragmentShader : " << it->second.fragmentShader
<< std::endl;
std::cout << Indent(2) << "attributes : "
<< PrintStringArray(it->second.attributes) << std::endl;
std::cout << Indent(2) << "name : " << it->second.name
<< std::endl;
}
}
{
std::map<std::string, tinygltf::Technique>::const_iterator it(
scene.techniques.begin());
std::map<std::string, tinygltf::Technique>::const_iterator itEnd(
scene.techniques.end());
std::cout << "techniques(items=" << scene.techniques.size() << ")"
<< std::endl;
for (; it != itEnd; it++) {
std::cout << Indent(1) << "name (id) : " << it->first << std::endl;
std::cout << Indent(2) << "program : " << it->second.program
<< std::endl;
std::cout << Indent(2) << "name (json) : " << it->second.name
<< std::endl;
std::cout << Indent(2)
<< "parameters(items=" << it->second.parameters.size() << ")"
<< std::endl;
std::map<std::string, tinygltf::TechniqueParameter>::const_iterator
paramIt(it->second.parameters.begin());
std::map<std::string, tinygltf::TechniqueParameter>::const_iterator
paramItEnd(it->second.parameters.end());
for (; paramIt != paramItEnd; ++paramIt) {
std::cout << Indent(3) << "name : " << paramIt->first << std::endl;
DumpTechniqueParameter(paramIt->second, 4);
}
std::cout << Indent(2)
<< "attributes(items=" << it->second.attributes.size() << ")"
<< std::endl;
DumpStringMap(it->second.attributes, 3);
std::cout << Indent(2) << "uniforms(items=" << it->second.uniforms.size()
<< ")" << std::endl;
DumpStringMap(it->second.uniforms, 3);
}
}
}
int main(int argc, char **argv) {
if (argc < 2) {
printf("Needs input.gltf\n");
exit(1);
}
tinygltf::Scene scene;
tinygltf::TinyGLTFLoader loader;
std::string err;
std::string input_filename(argv[1]);
std::string ext = GetFilePathExtension(input_filename);
bool ret = false;
if (ext.compare("glb") == 0) {
// assume binary glTF.
ret = loader.LoadBinaryFromFile(&scene, &err, input_filename.c_str());
} else {
// assume ascii glTF.
ret = loader.LoadASCIIFromFile(&scene, &err, input_filename.c_str());
}
if (!err.empty()) {
printf("Err: %s\n", err.c_str());
}
if (!ret) {
printf("Failed to parse glTF\n");
return -1;
}
Dump(scene);
return 0;
}
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