ImageGear for C and C++ on Windows v19.10 - Updated
Ripple Effects
User Guide > How to Work with... > Image Processing and Cleanup > Special Effects > Ripple Effects

This IG_FX_radial_wave effect warps the image in concentric rings. This effect is also known as Ripple Warp, Radial Wave, or Ring Wave.

The IG_FX_directional_wave function warps the image in a specific direction.

Original

Radial Wave Effect