RayPicker Class Reference

Ray casting and intersection testing. More...

#include <raypicker.h>

Static Public Member Functions
static bool	unproject (const QPoint &screenPos, const QRect &paneRect, const QMatrix4x4 &pvm, QVector3D &rayOrigin, QVector3D &rayDir)
static PickResult	pick (const QVector3D &rayOrigin, const QVector3D &rayDir, const SubView &subView, const QMap< QString, std::shared_ptr< BrainSurface > > &surfaces, const QMap< const QStandardItem *, std::shared_ptr< BrainSurface > > &itemSurfaceMap, const QMap< const QStandardItem *, std::shared_ptr< DipoleObject > > &itemDipoleMap)
static QString	buildLabel (const PickResult &result, const QMap< const QStandardItem *, std::shared_ptr< BrainSurface > > &itemSurfaceMap, const QMap< QString, std::shared_ptr< BrainSurface > > &surfaces)

Detailed Description

Ray casting and intersection testing.

Stateless ray-picking utility.

Given camera matrices, a screen position, and the scene contents, this class casts a ray and returns a PickResult describing the closest intersection. It has no state of its own — hover tracking is handled by the caller.

Definition at line 100 of file raypicker.h.

Member Function Documentation

buildLabel()

QString RayPicker::buildLabel ( const PickResult & result, const QMap< const QStandardItem *, std::shared_ptr< BrainSurface > > & itemSurfaceMap, const QMap< QString, std::shared_ptr< BrainSurface > > & surfaces )

static

Build a display label from a PickResult.

This examines the surface key, annotation data, and item type to produce a human-readable hover label.

Parameters

[in]	result	PickResult from pick().
[in]	itemSurfaceMap	Map for reverse item → surface lookup.
[in]	surfaces	Surface map for key-based lookup.

Returns

Display label string.

Definition at line 174 of file raypicker.cpp.

pick()

PickResult RayPicker::pick ( const QVector3D & rayOrigin, const QVector3D & rayDir, const SubView & subView, const QMap< QString, std::shared_ptr< BrainSurface > > & surfaces, const QMap< const QStandardItem *, std::shared_ptr< BrainSurface > > & itemSurfaceMap, const QMap< const QStandardItem *, std::shared_ptr< DipoleObject > > & itemDipoleMap )

static

Cast a ray against all surfaces in the scene.

Parameters

[in]	rayOrigin	World-space ray origin.
[in]	rayDir	World-space ray direction (normalised).
[in]	subView	Active SubView (for visibility / surface type filtering).
[in]	surfaces	Map of surface key → BrainSurface.
[in]	itemSurfaceMap	Map of tree item → BrainSurface (for reverse lookup).
[in]	itemDipoleMap	Map of tree item → DipoleObject.

Returns

PickResult for the closest hit.

Definition at line 85 of file raypicker.cpp.

unproject()

bool RayPicker::unproject ( const QPoint & screenPos, const QRect & paneRect, const QMatrix4x4 & pvm, QVector3D & rayOrigin, QVector3D & rayDir )

static

Unproject a screen position to a world-space ray.

Parameters

[in]	screenPos	2D cursor position (widget coords).
[in]	paneRect	Rectangle of the active viewport pane.
[in]	pvm	Combined projection × view × model matrix.
[out]	rayOrigin	Ray origin (world space).
[out]	rayDir	Ray direction (normalised, world space).

Returns

True if the unproject succeeded.

Definition at line 52 of file raypicker.cpp.

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The documentation for this class was generated from the following files:

• src/libraries/disp3D_rhi/input/raypicker.h
• src/libraries/disp3D_rhi/input/raypicker.cpp