GlslViewer is a flexible console-base OpenGL Sandbox to display 2D/3D GLSL shaders without the need of an UI. You can definitely make your own UI or wrapper using the Python Module (include) or any other tool that communicates back/forth with glslViewer through the standard POSIX console In/Out or OSC.

Joing #GlslViewer channel on shader.zone discord to learn how to use it, share work and get help.

GlslViewer gives support to:

• fragment and vertex shaders on GLSL
• resolve #include dependencies
• adding/deleting #define keys through console IN commands and OSC
• automatically generated set of defines based on the platform, buffer, render pass, geometry attributes and materials properties.
• passing custom uniforms (float, int, vec2, vec3 and vec4) through console IN or OSC
• Different kinds of Textures (png, bmp, jpg, tga, hdr, gif, mp4, mov, rtc, rtsp, local camera devices and audio textures)
• import of Cubemaps and spherical harmonics (png, jpg, tga, hdr)
• import LST, PLY, OBJ or GLTF files (and their dependencies)
• default vert/frag shaders for 2D shader and 3D material shaders with PBR lighting model
• hot reload of files on changes
• One default light and one default camera
• Interactive commands thought POSIX console IN/OUT or OSC
• different debug modes (histogram, textures, buffers, bounding box, etc)
• shadow maps
• headless rendering
• fullscreen and screensaver mode
• HoloPlay rendering on LookingGlass Display
• image export
• PNG sequence export
• WASM crosscompiling

• Installing

  • Compile on Linux
  • Compile on MacOS
  • Compile on Windows
  • Compile as WebAssembly

• Using GlslViewer

  • Loading a single Fragment shader
  • Loading geometry and a vertex shader
  • Load a model and edit the default PBR shader
  • Loading Textures
  • Audio and video Textures
  • Other arguments
  • Console IN commands

• Convention:

  • Defines
    • Platform
    • Buffers & Render Passes
    • Geometry Attributes
    • Materials
  • Uniforms

Patricio Gonzalez Vivo: github | twitter | instagram | website

Thanks to:

• Mihai Sebea and Bertrand Carré for making the Windows compile happen

• Karim Naaki lot of concept and code was inspired by this two projects: fragTool and hdreffects

• Doug Moen he help to add the compatibility to ShaderToy shaders and some RayMarching features were added for his integration with his project: curv.

• Wray implement the OSC listener feature, opening GlslViewer to an entire new ways of communicating and interacting with other apps, devices and ecosystems.

• Yvan Sraka for putting the code in shape and setting it up for TravisCI.

• Andsz for Spherical Harmonics code from Spherical Harmonics Playground

• Syoyo Fujita for the work on tinyobjloader v1.0.x

• Morgan McGuire's for the OBJ models on Computer Graphics Archive

• Philip Rideout and Romain Guy general generosity to share their code and experience

• Sergei B for adding support for Audio textures