Morph Target Animation -

// Input: base position and N target delta vectors vec3 finalPos = basePosition; for (int i = 0; i < numActiveTargets; i++) finalPos += weight[i] * delta[i];

In practice, games often use + morphs for face (e.g., Unreal Engine's Morph Targets, Unity's Blend Shapes). Implementation Sketch (GPU) Vertex shader pseudo-code: morph target animation

Here’s a comprehensive explanation of (also known as blend shape animation or vertex morphing ). What Is Morph Target Animation? Morph target animation is a technique for deforming a 3D mesh by interpolating between different pre-defined sets of vertex positions (called morph targets or blend shapes ). // Input: base position and N target delta