feat(v0.4a): grid snap on gizmo drag (hold Cmd/Ctrl)#33
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按住 Ctrl/Cmd 拖拽时把位置吸附到网格步长(0.5);snapTranslation 纯函数引擎(供 B/C 扩展)+ ThreeViewport objectChange hook + 修饰键追踪;mouseUp 提交不变(可撤销)。 仅平移;节点对齐/socket/旋转缩放吸附延后。 Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
objectChange 时(translate 模式 + 修饰键按住)用 snapTranslation 吸附 obj.position; mouseUp 提交吸附后 transform(可撤销,不改);window keydown/keyup/blur 追踪修饰键 + cleanup 移除。 Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
修复:没按 Ctrl/Cmd 也吸附——keydown/keyup 累积的修饰键状态会因 keyup 丢失 (Cmd+Z/Cmd+Tab)卡在 true。改为拖拽时从 pointermove/pointerdown(capture 阶段) 读即时 e.ctrlKey||e.metaKey,不卡住;不按修饰键即自由拖动。 Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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What
v0.4「空间吸附 / Socket 系统」第一个 sub-stage（基础）：gizmo 平移拖拽时按住 Ctrl/Cmd 吸附到 0.5 网格。
snapTranslation纯函数吸附引擎（src/core/snap/grid.ts，可单测，供 sub-stage B/C 扩展）。ThreeViewportgizmoobjectChangehook：translate 模式 + 修饰键按住时吸附obj.position；mouseUp不变（可撤销）。window keydown/keyup/blur 追踪修饰键。Why
How to test
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