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Add ResourceManager for assets outside of QRC 

+ Use qt6_add_big_resources to improve build time
+ RM::getPath(sting) to build absolute path to assets
+ Allows easy access to models or other large assets not loaded into QRC
This commit is contained in:
Shaun Reed 2022-07-31 18:50:02 -04:00
parent 82b06c247d
commit d3c11d4645
7 changed files with 93 additions and 35 deletions
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11
CMakeLists.txt
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@ -20,12 +20,16 @@ set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
# For CLion builds, point CMAKE_PREFIX_PATH to Qt6 install directory
list(APPEND CMAKE_PREFIX_PATH $ENV{HOME}/Code/Clones/Qt6.2/6.2.3/gcc_64/)
find_package(Qt6 COMPONENTS OpenGLWidgets REQUIRED)
list(APPEND CMAKE_PREFIX_PATH $ENV{HOME}/Code/Clones/Qt/6.3.1/gcc_64/)
find_package(Qt6 COMPONENTS OpenGLWidgets)
if (NOT Qt6_FOUND)
message(SEND_ERROR "Unable to find Qt6 at CMAKE_PREFIX_PATH: ${CMAKE_PREFIX_PATH}")
message(FATAL_ERROR "Specify path to Qt6 with `cmake -DCMAKE_PREFIX_PATH=/path/to/Qt/6.x.x/gcc_64 -S /path/to/qtk -B /path/to/qtk/build && cmake --build /path/to/qtk/build -j $(nprocs)`")
endif()
# Add our Qt resources.qrc file to our application
set(SOURCES app/main.cpp)
qt6_add_resources(SOURCES resources.qrc)
qt6_add_big_resources(SOURCES resources.qrc)
add_executable(
qtk # Executable name
@ -59,6 +63,7 @@ add_library(main-widget SHARED
src/transform3D.cpp src/transform3D.h
src/model.cpp src/model.h
src/scene.cpp src/scene.h
src/resourcemanager.cpp src/resourcemanager.h
)
target_include_directories(main-widget PUBLIC src/)

7
README.md
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@ -23,10 +23,9 @@ Be sure to take note of the Qt6 installation directory, as we will need it to co
Once Qt6 is installed, to build and run `qtk` on Ubuntu -
```bash
sudo apt update -y && sudo apt install freeglut3-dev libassimp-dev cmake build-essential git
git clone https://gitlab.com/shaunrd0/qtk && cd qtk
mkdir build && cd build
cmake .. -DCMAKE_PREFIX_PATH=$HOME/Qt6/6.2.3/gcc_64 && cmake --build .
./qtk
git clone https://gitlab.com/shaunrd0/qtk
cmake -DCMAKE_PREFIX_PATH=$HOME/Qt/6.3.1/gcc_64 -S qtk/ -B qtk/build/ && cmake --build qtk/build/ -j $(nprocs)
./qtk/build/qtk
```
You can fly around the scene if you hold the right mouse button and use WASD.

3
src/meshrenderer.h
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@ -37,7 +37,8 @@ public:
// Shader settings
inline void setShaderVertex(const std::string & vert) { mVertexShader = vert;}
inline void setShaderFragment(const std::string & frag) { mFragmentShader = frag;}
inline void setShaderFragment(const std::string & frag)
{ mFragmentShader = frag;}
void setShaders(const std::string & vert, const std::string & frag);
template <typename T>

20
src/model.cpp
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@ -11,6 +11,7 @@
#include <scene.h>
#include <texture.h>
#include <resourcemanager.h>
#include <model.h>
@ -188,6 +189,18 @@ void Model::flipTexture(const std::string & fileName, bool flipX, bool flipY)
* Model Private Member Functions
******************************************************************************/
/**
* Loads a model in .obj, .fbx, .gltf, and other formats
* For a full list of formats see assimp documentation:
* https://github.com/assimp/assimp/blob/master/doc/Fileformats.md
*
* Models should not be loaded into Qt resource system
* Instead pass an *absolute* path to this function
* Relative paths will break if Qtk is executed from different locations
* See resourcemanager.h for an example of how qtk handles this
*
* @param path Absolute path to a model .obj or other format accepted by assimp
*/
void Model::loadModel(const std::string & path)
{
Assimp::Importer import;
@ -195,13 +208,14 @@ void Model::loadModel(const std::string & path)
// JIC a relative path was used, get the absolute file path
QFileInfo info(path.c_str());
info.makeAbsolute();
std::string temp = info.absoluteFilePath().toStdString();
mDirectory = path[0] == ':' ? RM::getPath(path)
: info.absoluteFilePath().toStdString();
// Import the model, converting non-triangular geometry to triangles
// + And flipping texture UVs, etc..
// Assimp options: http://assimp.sourceforge.net/lib_html/postprocess_8h.html
const aiScene * scene =
import.ReadFile(temp, aiProcess_Triangulate
import.ReadFile(mDirectory, aiProcess_Triangulate
| aiProcess_FlipUVs
| aiProcess_GenSmoothNormals
| aiProcess_CalcTangentSpace
@ -216,7 +230,7 @@ void Model::loadModel(const std::string & path)
return;
}
// If there were no errors, find the directory that contains this model
mDirectory = path.substr(0, path.find_last_of('/'));
mDirectory = mDirectory.substr(0, mDirectory.find_last_of('/'));
// Pass the pointers to the root node and the scene to recursive function
// + Base case breaks when no nodes left to process on model

13
src/resourcemanager.cpp Normal file
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@ -0,0 +1,13 @@
/*##############################################################################
## Author: Shaun Reed ##
## Legal: All Content (c) 2022 Shaun Reed, all rights reserved ##
## About: Manage files and resources used by qtk ##
## ##
## Contact: shaunrd0@gmail.com | URL: www.shaunreed.com | GitHub: shaunrd0 ##
##############################################################################*/
#include "resourcemanager.h"
std::string RM::resourcesDir =
std::string(__FILE__).substr(0, std::string(__FILE__).find("src/"))
+ "resources/";

35
src/resourcemanager.h Normal file
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@ -0,0 +1,35 @@
/*##############################################################################
## Author: Shaun Reed ##
## Legal: All Content (c) 2022 Shaun Reed, all rights reserved ##
## About: Manage files and resources used by qtk ##
## ##
## Contact: shaunrd0@gmail.com | URL: www.shaunreed.com | GitHub: shaunrd0 ##
##############################################################################*/
#include <string>
#ifndef QTK_RESOURCEMANAGER_H
#define QTK_RESOURCEMANAGER_H
typedef class ResourceManager {
public:
/**
* Takes a path using qrc format and constructs full system path to qtk assets
* Qrc format prefix ':/' is trimmed from the path for the caller
* Assets used with RM may (or may not) appear in qtk/resources.qrc
*
* @param path Path relative to qtk/resources/; ie) ':/models/backpack/backpack.obj'
* An asset at location qtk/resources/path/to/asset.obj
* Should be given in qrc format: ':/path/to/asset.obj'
* @return Absoulte system path to a qtk asset
*/
static std::string getPath(const std::string & path) {
// Only construct qtk resource path if in qrc format; else return it as-is
return path[0] == ':' ? resourcesDir + path.substr(2) : path;
}
static std::string resourcesDir;
} RM;
#endif //QTK_RESOURCEMANAGER_H

39
src/scene.cpp
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@ -10,6 +10,7 @@
#include <texture.h>
#include <meshrenderer.h>
#include <model.h>
#include <resourcemanager.h>
#include <scene.h>
@ -151,42 +152,31 @@ void Scene::init()
//
// Model loading
mModels.push_back(new Model("backpack",
"../resources/models/backpack/backpack.obj"));
mModels.push_back(new Model("backpack", ":/models/backpack/backpack.obj"));
// Sometimes model textures need flipped in certain directions
mModels.back()->flipTexture("diffuse.jpg", false, true);
mModels.back()->mTransform.setTranslation(0.0f, 0.0f, -10.0f);
mModels.push_back(
new Model("bird",
"../resources/models/bird/bird.obj"));
mModels.push_back(new Model("bird", ":/models/bird/bird.obj"));
mModels.back()->mTransform.setTranslation(2.0f, 2.0f, -10.0f);
// Sometimes the models are very large
mModels.back()->mTransform.scale(0.0025f);
mModels.back()->mTransform.rotate(-110.0f, 0.0f, 1.0f, 0.0f);
mModels.push_back(new Model("lion",
"../resources/models/lion/lion.obj"));
mModels.push_back(new Model("lion", ":/models/lion/lion.obj"));
mModels.back()->mTransform.setTranslation(-3.0f, -1.0f, -10.0f);
mModels.back()->mTransform.scale(0.15f);
mModels.push_back(
new Model("alien",
"../resources/models/alien-hominid/alien.obj"));
mModels.push_back(new Model("alien", ":/models/alien-hominid/alien.obj"));
mModels.back()->mTransform.setTranslation(2.0f, -1.0f, -5.0f);
mModels.back()->mTransform.scale(0.15f);
mModels.push_back(
new Model("scythe",
"../resources/models/scythe/scythe.obj")
);
mModels.push_back(new Model("scythe", ":/models/scythe/scythe.obj"));
mModels.back()->mTransform.setTranslation(-6.0f, 0.0f, -10.0f);
mModels.back()->mTransform.rotate(-90.0f, 1.0f, 0.0f, 0.0f);
mModels.back()->mTransform.rotate(90.0f, 0.0f, 1.0f, 0.0f);
mModels.push_back(
new Model("masterChief",
"../resources/models/spartan/spartan.obj"));
mModels.push_back(new Model("masterChief", ":/models/spartan/spartan.obj"));
mModels.back()->mTransform.setTranslation(-1.5f, 0.5f, -2.0f);
@ -204,9 +194,9 @@ void Scene::init()
mMeshes.back()->init();
mModels.push_back(
new Model("alienTest",
"../resources/models/alien-hominid/alien.obj",
":/model-specular.vert", ":/model-specular.frag"));
new Model("alienTest", ":/models/alien-hominid/alien.obj",
":/model-specular.vert", ":/model-specular.frag")
);
mModels.back()->mTransform.setTranslation(3.0f, -1.0f, 10.0f);
mModels.back()->mTransform.scale(0.15f);
mModels.back()->setUniform("uMaterial.ambient", QVector3D(1.0f, 1.0f, 1.0f));
@ -224,7 +214,8 @@ void Scene::init()
// Test spartan Model with phong lighting, specular and normal mapping
mMeshes.push_back(
new MeshRenderer("spartanTestLight", Triangle(QTK_DRAW_ELEMENTS)));
new MeshRenderer("spartanTestLight", Triangle(QTK_DRAW_ELEMENTS))
);
mMeshes.back()->mTransform.setTranslation(1.0f, 1.5f, 10.0f);
mMeshes.back()->mTransform.scale(0.25f);
// This function changes values we have allocated in a buffer, so init() after
@ -232,9 +223,9 @@ void Scene::init()
mMeshes.back()->init();
mModels.push_back(
new Model("spartanTest",
"../resources/models/spartan/spartan.obj",
":/model-normals.vert", ":/model-normals.frag"));
new Model("spartanTest", ":/models/spartan/spartan.obj",
":/model-normals.vert", ":/model-normals.frag")
);
mModels.back()->mTransform.setTranslation(0.0f, -1.0f, 10.0f);
mModels.back()->mTransform.scale(2.0f);
mModels.back()->setUniform("uMaterial.ambient", QVector3D(1.0f, 1.0f, 1.0f));