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ifcviewer-full: volume tool with HUD + per-object labels

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Mirrors the Area tool's display: HUD shows total volume + object count,
each selected object gets a label at its world-AABB centroid showing
its individual volume.  Gated behind ToolMode::Volume (Ctrl+Shift+V) so
it stays out of the way until invoked.

Volume is a passive tool — selection works as in None (multi-select,
modifier toggle, box-select all keep working).  Area / Length still
intercept clicks through surfacePickedInTool.

Adds volumesPerObject() reusing the same mesh-cached readback path as
volumeOfObjects, so the per-object split costs no extra GL readbacks.
computeObjectAabb is promoted to public for the centroid lookup.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
This commit is contained in:
Dion Moult
2026-05-10 08:45:08 +10:00
parent bba2f30816
commit 0a297babea
6 changed files with 124 additions and 16 deletions
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src/ifcviewer/ViewportWindow.h
+11 -5
View File
@@ -255,11 +255,15 @@ public:
// object selection); the app interprets them per-tool. Esc exits the
// active tool. Backspace/Delete in length mode emits
// toolBackspacePressed for "remove last point" semantics.
enum class ToolMode { None, Area, Length };
// Area / Length consume LMB clicks via surfacePickedInTool; Volume
// is passive — selection behaves as in None and the host just gates
// its volume HUD/labels on this mode.
enum class ToolMode { None, Area, Length, Volume };
Q_ENUM(ToolMode)
void toggleAreaTool();
void toggleLengthTool();
void toggleVolumeTool();
void setToolMode(ToolMode mode);
ToolMode toolMode() const { return tool_mode_; }
@@ -379,6 +383,10 @@ public:
// Frame the union of all finalized models. No-op if the scene is empty.
void viewAll();
// World-space AABB query. Returns false when the object has no live
// instance or no mesh AABB yet (caller should treat as "unknown").
bool computeObjectAabb(uint32_t object_id, QVector3D& mn, QVector3D& mx) const;
struct CameraState {
QVector3D target;
float distance;
@@ -466,10 +474,8 @@ private:
void updateSectionDrag(int x, int y);
void updateCamera();
// Geometry queries used by focusOnSelectedObject() / viewAll(). Both
// return false when nothing matched (caller should leave the camera
// alone). Bounds are world-space AABBs.
bool computeObjectAabb(uint32_t object_id, QVector3D& mn, QVector3D& mx) const;
// Scene-wide AABB used by viewAll(). Returns false when the scene
// has no finalized geometry (caller should leave the camera alone).
bool computeSceneAabb(QVector3D& mn, QVector3D& mx) const;
// Re-aim the orbit camera so the bounding sphere of [mn, mx] just fits
// vertically and horizontally within the current FOV, with `padding`