Embedded Files
Face Ripples
Face Ripples
In this AR effect sticker, ripples are animated on user's face.
These effects were made in Snap's Lens studio. Lens studio provides users with user friendly interface of using Snap's face tracking framework. I authored the animated ripple shader in the shader graph that Lens studio also provides.
The ripples were procedurally animated following the concept of CFPA.
Lens studio shader graph
Breakdown
Breakdown
The space for drawing the animated ripple pattern, was determined by quantizing the reference position. The quantization frequency defined the scale of ripples. Each cells were rotated and translated by applying the inverse transformation to the reference position. In each cell, repetitive normalized age and life id was determined, so that the cells could be color-coded per their cell ids and their life ids. The normalized position of in each cell was used as UVW coordinate. The UVW distance from the center was used to draw spherical border that represented the size of ripples. The ripple patterns were drawn in the range of u_start and u_end as described above. Multiple ripple functions could be used to overlap ripple patterns. Finally, the ripple patterns were blended with painted mask to reveal them on user's face.
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