HJGraphics

HJGraphics is a very simple 3D graphic framework based on OpenGL API, and also my attempt to build a relatively complete tiny 3D graphic framework from the ground up. It is a part of my bachelor graduation project as well.

By using HJGraphics, you can create OpenGL environment easily and draw some funny 3D objects with only a few lines of codes.

eg.

Window window(windowWidth,windowHeight,windowTitle);
Camera camera(cameraPosition,cameraDirection);
auto box=make_shared<Box>(boxWidth,boxDepth,boxHeight);
auto pointLight=make_shared<PointLight>(lightPosition);
auto scene=make_shared<Scene>();
scene->addCamera(camera);
scene->addObject(box);
scene->addLight(pointLight);
auto renderer=make_shared<DeferredRenderer>();
renderer->setMainScene(scene);
window.renderer=renderer;
window.run();

Features

HJGraphics has...

• Window : a GLFW wrapped window system(now HJGraphics supports Qt, see HJGraphics-Qt).
• Camera
• Scene : an easy way to manage and draw objects.
• Object : a few build-in 3D objects support include
  • Model
  • Basic geometries like cylinder, box and plane.
  • Skybox
  • Coordinate and grid
• Light : build-in basic lights support and unlimited number of lights in a single scene.
  • Point light
  • Parallel light
  • Spot light
  • Shadow for 3 kinds of lights above
• Material : BlinnPhong material and UE4 workflow PBR material.
• Renderer : deferred and forward shading support, SSAO, text rendering, IBL
• Post-Processing : Screen Space Reflection, Motion Blur(Both camera & object), HDR, Depth of Field, Chromatic aberration, Bloom

Gallery

Fig.1 unlimited number of lights and shadow support

Fig.2 PBR shading

Fig.3 model loading support (only obj format fully supported now)

Fig.4 basic material

Dependencies

• Assimp 5.0.1 64bit
• GLFW 3.3 64bit
• GLAD
• glm 0.9.9.8
• stb
• freetype 2.10.2
• SPDLOG

Build passed on Windows 10(Visual Studio 2017) and macOS 10.14(CLion)

Continue advancing

• SSAO
• Load scene via JSON file
• HDR
• Deferred shading
• PBR Shading
• Motion Blur
• Animater(basic)
• Depth of field
• SSR

Acknowledge

Amazing tutorials : learnopengl.com

Shader tutorials : 3D Game Shaders For Beginners

OpenGL API reference : OpenGL wiki

Useful book : OpenGL Programming Guide