feat: asset drag-into-viewport with ground-raycast drop point#35
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Custom pointer drag (Tauri dragDropEnabled=true suppresses HTML5 ondrop) → ghost follows cursor → drop on canvas raycasts y=0 ground plane → new node at hit x/z, keeping the library item's default y. Double-click add-at-default preserved. Pure fns screenToNdc/dropPositionFor/ findLibraryItem (lib layer so runtime adapter can reuse). Undoable via AddNodeCommand. 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>
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Roadmap updated: v0.4 "资源拖拽入视口 + 落点" marked done. |
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What
Drag a library card into the viewport to add a node at the drop point (ground y=0 raycast x/z, keeping the item's default y). Existing double-click add-at-default is preserved.
screenToNdc+dropPositionFor(src/lib/drop-helpers.ts)catalog.findLibraryItem(id, uploads)adapter.raycastGroundPoint(x,y)→ y=0 plane hit | nullui-store.assetDragItemId+ start/end actionsasset-drag.tspointer controller (5px threshold → activate)AssetDragGhostcursor-following DOM ghostThreeViewportwindow pointerup → drop → AddNodeCommand (undoable)Why
Backlog item split from v0.2 library; user-ordered after v0.4 sub-stage B (#34). Tauri
dragDropEnabled=truesuppresses HTML5 ondrop → custom pointer drag.How to test
pnpm tauri dev: ⌘/Ctrl+J → drag a geometry/light/glb card into viewport → node lands at cursor's ground point; ghost follows; release outside canvas cancels; pure double-click still adds at default; Cmd+Z undoes. Pure fns:pnpm test(drop-helpers + findLibraryItem green).🤖 Generated with Claude Code