webgl-framework VS curtainsjs

After the terrain we draw a sky hemisphere object with the basic DiffuseShader, and then draw 11 cloud sprites. Then we draw a sun sprite. These transparent objects are rendered without writing to the depth buffer. Clouds and sun have trimmed geometries for less overdraw. You can read about this optimized sprites technique here. We decided not to use soft particles for clouds because scene size allowed us to place them so that they don’t intersect with other geometries while still partially occluding some peaks. Not using soft particles is beneficial for performance because they require additional render pass to render scene depth.

Historically, the web demo was created first — it was used as a prototyping playground to compose a scene and to fine-tune shaders. Also, this really helps in sharing work between a team of two people without necessity to learn Android Studio for both. And when everything was polished and looked good enough, an Android app was created quite fast based on the web demo code. Porting code to Android is a quite straightforward and easy process because our WebGL framework has the same method signatures as the framework used in Android apps.

If you're purely wanting to add a shader effect then as a newcomer to the shader world I'd recommend curtainsjs as an easy way to add custom shaders without the hassle of having to deal with low level WebGL setup stuff. They even have a similar example with the mouse distortion effect where the code is much more readable and well commented with another codepen by the creator of curtains which has a more similar mouse flow effect that could be repurposed to be a post effect shader and distort the output of a gradient shader.

Curtainsjs - Lightweight vanilla WebGL JavaScript library that turns HTML DOM elements into interactive textured planes.