squash-stretch-mastery

Squash and stretch is considered the most important of Disney's 12 principles because it solves animation's fundamental problem: making rigid objects feel alive. Developed in the 1930s at Disney, it emerged from observing how real flesh and rubber deform under force while maintaining constant volume.

Volume Preservation: When an object squashes, it must widen. When it stretches, it must narrow. This constraint creates believability—violate it and objects appear to grow or shrink rather than deform.

Force Visualization: Squash and stretch makes invisible forces visible. A ball squashing on impact shows us the floor's resistance. A character stretching mid-leap reveals velocity and momentum.

変形効果、バウンス アニメーション、衝撃応答、または有機的な弾性と重量の表現が必要なモーションを実装する場合に使用します。 ソース: dylantarre/animation-principles。