| src | ドラッグのソースポイント(開始の点) |
| dest | ドラッグを終えた点 |
| srcPosition | ドラッグされたオブジェクトの src レイ の 3D の位置 |
| constraintDir | Normalized 3D direction of constrained movement. |
float constraintDir に沿って移動した距離
3D 空間のラインに沿ってマウスをドラッグするマップ
(矢印のような) 特定のタイプのハンドルは 3D 空間でラインに沿った移動を含みます。たとえば、トランスフォームの Position の矢印はマウスがドラッグされるとローカルの X 、Y、Z 軸に沿ってオブジェクトを移動させます。CalcLineTranslation 関数は Unity の組み込みツールによって使用されるおなじみの方法です。マウスの動きを 3D のラインに沿って拘束された動きに変換します。
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