A simple program written in C++ that reads a fragment shader and shades it to the screen. Has basic compatibility with GLSL Sandbox (Heroku) and Shadertoy fragment shaders.
- GLFW3 (tested and works on
3.3.1onUbuntu 18.04 LTS)
Run make to compile the program. Once it is compiled, type in your shader in the playground.fsh file and run the executable to see it in action.
./glsl_playground [width height]
// returns the dimensions of the window
uniform vec2 resolution
// returns the mouse position in the interval [0.0, 1.0] for .xy.
// origin is at bottom-left
uniform vec2 mouse
// returns the time in seconds from when the program started
uniform float time
// returns the dimensions of the window
uniform vec3 iResolution
// returns the mouse coordinates (when clicked) for .xy
// and the mouse coordinates from last mouse press for .zw
// origin is at bottom-left
uniform vec4 iMouse
// returns the time in seconds from when the program started
uniform float iTime
Note: Please do not type Shadertoy uniform declarations in your shader as they are already included in the shader_toy_inputs.fsh file.
- Read and execute custom fragment shaders
- Works with some GLSL Heroku and Shadertoy shaders
- Display time in seconds and frames per second on the title window.
- (not yet implemented) Pressing 1-4 changes resolution factor (1x, 2x, 4x, 8x)
- Pressing R resets timer to zero. Pressing Shift + R reloads the shaders.
- Pressing the spacebar pauses/resumes GLSL Playground.
- Esc or closing the program through traditional means exits the program.
- Learn more how OpenGL works (I'm a noob at this)
- Improve performance by optimizing code
Add pause function that can be done by pressing the space bar- Implement resolution factor as seen in GLSL Heroku
Add ability to reload shader that can be done by pressing Shift + R- Improve compatibility with GLSL Heroku and Shadertoy
- Add various geometry that can be used to test shaders on rather than simply rendering on the screen
- Add capability to read in multiple shaders, that can be navigated by pressing the cursor keys.
This is purely a learning experience, to allow me to learn more about OpenGL and GLSL. I'm inspired from others who produce vivid shaders which is breathtaking and breaks a whole new level of algorithmic arts. GLSL is a powerful language, and I think it deserves a native program to get more people interested in this field. I chose C++ in hopes of achieving better performance and removing the overhead required to render the website; however I'm skeptical that my program can run significantly faster than GLSL Heroku or Shadertoy.
This program is under BSD 2-Clause license.