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509ac33abe
the inputlayout incorrectly described the POSITION attribute as being 4D, while ImDrawVert::pos is 2D. This went unnoticed because the buffer binding has a stride of sizeof(ImDrawVert) and the POSITION is treated as a float2 in the vertex shader. If you switch POSITION to float4 in the vertex shader (and actually use the z/w in the matrix multiplication) then everything become wacky-looking since it's interpreting the texture coordinates as z/w. On a similar note: It's weird that the projection matrix takes z and w into consideration when those don't exist in the shader due to positions being float2s.
Those are standalone ready-to-build applications to demonstrate ImGui.
Binaries of some of those demos are available at http://www.miracleworld.net/imgui/binaries
TL;DR;
Refer to 'opengl_example' to understand how the library is setup, because it is the simplest one.
Copy the imgui_impl_xxx.cpp/.h files you need if you are using one of provided rendering/IO backends.
If using different or your own backend, copy opengl_example/imgui_impl_opengl.cpp/.h to get started.
ImGui is highly portable and only requires a few things to run:
- Providing mouse/keyboard inputs
- Load the font atlas texture into GPU memory
- Providing a render function to render indexed textured triangles
- Optional: clipboard support, mouse cursor supports, Windows IME support, etc.
So this is essentially what those examples are doing + the obligatory cruft for portability.
Unfortunately in 2015 it is still tedious to create and maintain portable build files using external
libraries (the kind we're using here to create a window and render 3D triangles) without relying on
third party software. For most examples here I choose to provide:
- Makefiles for Linux/OSX
- Batch files for Visual Studio 2008+
- A .sln project file for Visual Studio 2010+
Please let me know if they don't work with your setup!
You can probably just import the imgui_impl_xxx.cpp/.h files into your own codebase or compile those
directly with a command-line compiler.
opengl_example/
OpenGL example, using GLFW + fixed pipeline.
This is simple and should work for all OpenGL enabled applications.
Prefer following this example to learn how ImGui works!
(You can use this code in a GL3/GL4 context but make sure you disable the programmable pipeline
by calling "glUseProgram(0)" before ImGui::Render.)
opengl3_example/
OpenGL example, using GLFW/GL3W + programmable pipeline.
This uses more modern OpenGL calls and custom shaders. It's more messy.
directx9_example/
DirectX9 example, Windows only.
directx11_example/
DirectX11 example, Windows only.
This is quite long and tedious, because: DirectX11.
ios_example/
iOS example.
Using Synergy to access keyboard/mouse data from server computer.
Synergy keyboard integration is rather hacky.
sdl_opengl_example/
SDL2 + OpenGL example.
allegro5_example/
Allegro 5 example.