learnopengl-qt3d

Qt3D version of http://learnopengl.com/ examples, currently works with Qt5.7

Just want to see how OpenGL works in Qt3D undocumented libs~

Pure QML version, use qmlscene to run with default OpenGL Context (GL3.0 for QtQuick 2.7), shaders are GLES2.0 compatible

Compiled version, context set to GL3.3/GLES, can run on Android

notes

Main qml file for qmlscene/binary/QmlCreator

• app.qml: main window with line chart FPS display

• app-cpp.qml: main window with text FPS display

• main.qml: QuickItem as root + text FPS display

You can lauch one sample with a keyword like:

• qmlscene skybox app.qml
• ./learnopengl-qt3d geometry

*Some large assets from the website is downloaded by qmake script(nix compatible), connection is required at the first build or after updated. See assets.pri for details

leanopengl uses a little different lighting model from Qt3D default model, to rendering models for a better result, please slightly modify the ka, kd in mtl files

Examples

• Hello Window : works

• Hello Triangle : works

• Hello Triangle 2 Wireframe : works

• Shaders Uniform : works

• Shaders Interpolated : works

• Texture : works

• Textures Combined : NEW sRGB color format get wierd output

• Transformations : works

• Coordinate Systems : works

• Coordinate Systems MultiObj : works

• Camera/Orbit : works

• Camera/WASD : works

• Camera/FPS : Qt3D FPS Controller can go up-side-down!!

• Color : works

• Basic Lighting Phong-Diffuse : works

• Basic Lighting Phong/Gouraud : works

• Material : works

• Diffuse Specular Map : works

• Diffuse Specular Emission Map : works

• Directional Light : works

• Spot Light(hard) : works

• Multiple Lights : why quadratic attenuation model is in gl3 shaders only?

• Import Models :

  • SceneLoader is buggy, crashes on destroy

  • Not work on Android

  • Sometimes the 2nd bot is not shown

• Stencil Testing : works

• Discard Blend : works, bad performance on my phone

• Alpha Blend: BlendEquationArguments, what is the right parameters??

• Framebuffer :

  • RenderTargetOutput with color crashes on destroy

  • Not work on my phone: GL_INVALID_OPERATION

• Skybox : HiRes texture can easily get GL_OUT_OF_MEMORY on my phone

• Simple Glass : works

• Glass Texture : don't know how to manipulate SceneLoader models

• Geometry Shader : only GL3.3 Core version, need for GLES version

• Instancing :

  • Require gl_InstanceID, only GL3.3 Core version, need for GLES version

  • The rocks are CLIPPED!!! need fix

• Lighting Blinn-Phong : Tab/Space key may conflict with Combobox

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• TEST/BIGMODEL : super bad performance on my phone ~12fps

• TEST/PLASMA : noise on Desktop, wrong placement on Android -> precision problem??