Procedural Animation - Water Droplet

This code displays a scene with a procedurally animated regular grid that models a water surface.

• - The animation of the surface is computed directly in the vertex shader shaders/water/water.vert.glsl
• - The fragment shader shaders/water/water.frag.glsl also implements an environment map which is already pre-coded.
• - When you press on the SPACE key or click on the GUI button water drop, a geometric deformation is applied to a random location on the grid. This deformation is implemented in the vertex shader.

Objective: The objective is to modify the shader deformation to represent a dynamic effect of a water droplet inspired by the example below.

• - The modification should be made in the function float deformation(float x, float y, float t) in the file shaders/water/water.vert.glsl.
• - The code is set to allow up to five active droplet effects at the same time. A counter starts for each new droplet effect and lasts for five seconds (see the function scene_structure::new_water_droplet).
• - Each droplet effect is fully parameterized by a single vec4 structure storing respectively its x coordinate, y coordinates, initial time of the droplet effect, and an additional parameter indicating if the droplet effect has already be created or not.
• - Help: The droplet effect can be parameterized as a mix of expanding Gaussian bump multiplied by a cosine function.
• - Once the droplet effect is implemented, you may add an additional view of a falling droplet above the water displayed as a sphere that falls down before starting the deformation effect on the water surface.