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Add gltf node parsing

master
Riyyi 3 years ago
parent
cf44172943
commit
a7953b4bdd
2 changed files with 121 additions and 47 deletions
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  1. 113
      inferno/src/inferno/render/gltf.cpp
  2. 55
      inferno/src/inferno/render/gltf.h

113
inferno/src/inferno/render/gltf.cpp
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@ -1,11 +1,11 @@
#include "inferno/util/json.h"
#include <algorithm> // std::copy
#include "nlohmann/json.hpp"
#include "inferno/assert.h"
#include "inferno/io/gltffile.h"
#include "inferno/io/log.h"
#include "inferno/render/gltf.h"
#include <stdint.h>
namespace Inferno {
@ -22,22 +22,11 @@ namespace Inferno {
// Asset
// ---------------------------------
{
ASSERT(Json::hasProperty(json, "asset"), "GlTF model missing required property 'asset'");
auto asset = json["asset"];
auto copyright = Json::parseStringProperty(asset, "copyright", false);
auto generator = Json::parseStringProperty(asset, "generator", false);
auto version = Json::parseStringProperty(asset, "version", true);
ASSERT(version, "GlTF model missing required property 'version'");
ASSERT(version.value().compare("2.0") == 0, "GlTF version unsupported '{}'", version.value());
auto minVersion = Json::parseStringProperty(asset, "minVersion", false);
if (copyright) m_model.asset.copyright = copyright.value();
if (generator) m_model.asset.generator = generator.value();
if (version) m_model.asset.version = version.value();
if (minVersion) m_model.asset.minVersion = minVersion.value();
}
ASSERT(Json::hasProperty(json, "asset"), "GlTF model missing required property 'asset'");
auto asset = json["asset"];
ASSERT(asset.is_object(), "Gltf model invalid property type 'asset'");
parseAsset(&m_model.asset, asset);
// Scene
// ---------------------------------
@ -45,7 +34,7 @@ namespace Inferno {
if (Json::hasProperty(json, "scenes")) {
auto scenes = json["scenes"];
ASSERT(scenes.is_array(), "GlTF model property 'scenes' invalid type");
ASSERT(scenes.is_array(), "Gltf model invalid property type 'scenes'");
for (auto& [key, object] : scenes.items()) {
glTF::Scene scene;
@ -57,13 +46,25 @@ namespace Inferno {
// Node
// ---------------------------------
if (Json::hasProperty(json, "nodes")) {
auto nodes = json["nodes"];
ASSERT(nodes.is_array(), "Gltf model invalid property type 'nodes'");
for (auto& [key, object] : nodes.items()) {
glTF::Node node;
parseNode(&node, key, object);
m_model.nodes.emplace_back(std::move(node));
}
}
// Mesh
// ---------------------------------
if (Json::hasProperty(json, "meshes")) {
auto meshes = json["meshes"];
ASSERT(meshes.is_array(), "GlTF model property 'meshes' invalid type");
ASSERT(meshes.is_array(), "Gltf model invalid property type 'meshes'");
for (auto& [key, object] : meshes.items()) {
glTF::Mesh mesh;
@ -78,7 +79,7 @@ namespace Inferno {
if (Json::hasProperty(json, "accessors")) {
auto accessors = json["accessors"];
ASSERT(accessors.is_array(), "GlTF model property 'accessors' invalid type");
ASSERT(accessors.is_array(), "Gltf model invalid property type 'accessors'");
for (auto& [key, object] : accessors.items()) {
glTF::Accessor accessor;
@ -93,7 +94,7 @@ namespace Inferno {
if (Json::hasProperty(json, "bufferViews")) {
auto bufferViews = json["bufferViews"];
ASSERT(bufferViews.is_array(), "GlTF model property 'bufferViews' invalid type");
ASSERT(bufferViews.is_array(), "Gltf model invalid property type 'bufferViews'");
for (auto& [key, object] : bufferViews.items()) {
glTF::BufferView bufferView;
@ -108,7 +109,7 @@ namespace Inferno {
if (Json::hasProperty(json, "buffers")) {
auto buffers = json["buffers"];
ASSERT(buffers.is_array(), "GlTF model property 'buffers' invalid type");
ASSERT(buffers.is_array(), "Gltf model invalid property type 'buffers'");
for (auto& [key, object] : buffers.items()) {
glTF::Buffer buffer;
@ -122,6 +123,24 @@ namespace Inferno {
{
}
void Gltf::parseAsset(glTF::Asset* asset, const json& object)
{
auto copyright = Json::parseStringProperty(object, "copyright", false);
auto generator = Json::parseStringProperty(object, "generator", false);
auto version = Json::parseStringProperty(object, "version", true);
ASSERT(version, "GlTF model missing required property 'version'");
ASSERT(version.value().compare("2.0") == 0, "GlTF version unsupported '{}'", version.value());
auto minVersion = Json::parseStringProperty(object, "minVersion", false);
if (copyright) asset->copyright = copyright.value();
if (generator) asset->generator = generator.value();
if (version) asset->version = version.value();
if (minVersion) asset->minVersion = minVersion.value();
}
void Gltf::parseScene(glTF::Scene* scene, const std::string& key, const json& object)
{
auto nodes = Json::parseDoubleArrayProperty(object, "nodes", false);
@ -132,10 +151,50 @@ namespace Inferno {
scene->name = name ? name.value() : key;
}
void Gltf::parseNode(glTF::Node* node, const std::string& key, const json& object)
{
auto camera = Json::parseUnsignedProperty(object, "camera", false);
auto children = Json::parseUnsignedArrayProperty(object, "children", false);
ASSERT(!children || children.value().size() > 0, "Gltf node '{}' empty property 'children'", key);
auto skin = Json::parseUnsignedProperty(object, "skin", false);
auto matrix = Json::parseDoubleArrayProperty(object, "matrix", false);
ASSERT(!matrix || matrix.value().size() == 16, "Gltf node '{}' property 'matrix' invalid size", key);
auto mesh = Json::parseUnsignedProperty(object, "mesh", false);
auto rotation = Json::parseDoubleArrayProperty(object, "rotation", false);
ASSERT(!rotation || rotation.value().size() == 4, "Gltf node '{}' property 'rotation' invalid size", key);
auto scale = Json::parseDoubleArrayProperty(object, "scale", false);
ASSERT(!scale || scale.value().size() == 3, "Gltf node '{}' property 'scale' invalid size", key);
auto translation = Json::parseDoubleArrayProperty(object, "translation", false);
ASSERT(!translation || translation.value().size() == 3, "Gltf node '{}' property 'translation' invalid size", key);
auto weights = Json::parseDoubleArrayProperty(object, "weights", false);
ASSERT(!weights || weights.value().size() > 0, "Gltf node '{}' empty property 'weights'", key);
auto name = Json::parseStringProperty(object, "name", false);
if (camera) node->camera = camera.value();
if (children) node->children = children.value();
if (skin) node->skin = skin.value();
if (matrix) std::copy(matrix.value().begin(), matrix.value().end(), node->matrix.begin());
if (mesh) node->mesh = mesh.value();
if (rotation) std::copy(rotation.value().begin(), rotation.value().end(), node->rotation.begin());
if (scale) std::copy(scale.value().begin(), scale.value().end(), node->scale.begin());
if (translation) std::copy(translation.value().begin(), translation.value().end(), node->translation.begin());
if (weights) node->weights = weights.value();
node->name = name ? name.value() : key;
}
void Gltf::parsePrimitive(glTF::Primitive* primitive, const std::string& key, const json& object)
{
auto attributes = Json::parseUnsignedObjectProperty(object, "attributes", true);
ASSERT(attributes && attributes.value().size() > 0, "Gltf primitive '{}' invalid property 'attributes'", key);
ASSERT(attributes && attributes.value().size() > 0, "Gltf primitive '{}' empty property 'attributes'", key);
auto indices = Json::parseUnsignedProperty(object, "indices", false);
@ -181,7 +240,7 @@ namespace Inferno {
}
auto weights = Json::parseDoubleArrayProperty(object, "weights", false);
ASSERT(!weights || weights.value().size() > 0, "Gltf mesh '{}' empty 'weights' property", key);
ASSERT(!weights || weights.value().size() > 0, "Gltf mesh '{}' empty property 'weights'", key);
auto name = Json::parseStringProperty(object, "name", false);
@ -207,10 +266,10 @@ namespace Inferno {
ASSERT(type, "Gltf accessor '{}' missing required property 'type'", key);
auto max = Json::parseDoubleArrayProperty(object, "max", false);
ASSERT(!max || max.value().size() > 0, "Gltf accessor '{}' empty 'max' property", key);
ASSERT(!max || max.value().size() > 0, "Gltf accessor '{}' empty property 'max'", key);
auto min = Json::parseDoubleArrayProperty(object, "min", false);
ASSERT(!min || min.value().size() > 0, "Gltf accessor '{}' empty 'min' property", key);
ASSERT(!min || min.value().size() > 0, "Gltf accessor '{}' empty property 'min'", key);
auto name = Json::parseStringProperty(object, "name", false);

55
inferno/src/inferno/render/gltf.h
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@ -3,7 +3,6 @@
#include <cstdint> // uint32_t
#include <memory> // std::shared_ptr
#include <stdint.h>
#include <string> // std::string
#include <unordered_map> // std::unordered_map
#include <vector> // std::vector
@ -14,57 +13,70 @@ namespace Inferno {
namespace glTF {
// Type specifications
// https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#objects
// https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#scene
// https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#asset
struct Asset {
std::string copyright;
std::string generator;
std::string version; // Required
std::string minVersion;
};
// https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#scenes
struct Scene {
std::vector<uint32_t> nodes;
std::string name;
};
// https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#reference-asset
struct Asset {
std::string copyright;
std::string generator;
std::string version; // required
std::string minVersion;
// https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#nodes-and-hierarchy
struct Node {
uint32_t camera;
std::vector<uint32_t> children;
uint32_t skin;
std::array<double, 16> matrix { 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1 }; // Identity matrix
uint32_t mesh;
std::array<double, 4> rotation { 0, 0, 0, 1 };
std::array<double, 3> scale { 1, 1, 1 };
std::array<double, 3> translation { 0, 0, 0 };
std::vector<double> weights;
std::string name;
};
// https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#primitive
struct Primitive {
std::map<std::string, uint32_t> attributes; // required
std::map<std::string, uint32_t> attributes; // Required
uint32_t indices;
uint32_t material;
unsigned char mode { 4 };
std::vector<std::map<std::string, uint32_t>> targets;
};
// https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#mesh
// https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#meshes
struct Mesh {
std::vector<Primitive> primitives; // required
std::vector<Primitive> primitives; // Required
std::vector<double> weights;
std::string name;
};
// https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#accessors
// https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#accessor
struct Accessor {
uint32_t bufferView;
uint32_t byteOffset { 0 };
uint32_t componentType; // required
uint32_t componentType; // Required
bool normalized { false };
uint32_t count; // required
std::string type; // required
uint32_t count; // Required
std::string type; // Required
std::vector<double> max;
std::vector<double> min;
std::string name;
};
// https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#bufferview
// https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#buffers-and-buffer-views
struct BufferView {
uint32_t buffer; // required
uint32_t buffer; // Required
uint32_t byteOffset { 0 };
uint32_t byteLength; // required
uint32_t byteLength; // Required
uint32_t byteStride;
uint32_t target;
std::string name;
@ -72,7 +84,7 @@ namespace Inferno {
struct Buffer {
std::string uri;
uint32_t byteLength; // required
uint32_t byteLength; // Required
std::string name;
};
@ -80,6 +92,7 @@ namespace Inferno {
Asset asset;
std::vector<Scene> scenes;
std::vector<Node> nodes;
std::vector<Mesh> meshes;
std::vector<Accessor> accessors;
std::vector<BufferView> bufferViews;
@ -98,7 +111,9 @@ namespace Inferno {
inline const glTF::Model& model() const { return m_model; }
private:
static void parseAsset(glTF::Asset* asset, const json& object);
static void parseScene(glTF::Scene* scene, const std::string& key, const json& object);
static void parseNode(glTF::Node* node, const std::string& key, const json& object);
static void parsePrimitive(glTF::Primitive* primitive, const std::string& key, const json& object);
static void parseMesh(glTF::Mesh* mesh, const std::string& key, const json& object);
static void parseAccessor(glTF::Accessor* accessor, const std::string& key, const json& object);

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