ScaleHandle Class Reference

#include <ScaleHandle.h>

Inheritance diagram for ScaleHandle:

Collaboration diagram for ScaleHandle:

Public Member Functions
	ScaleHandle (SceneObject *tgt, Axis ax)
void	onDrag (const Math::Ray &ray) override
	Handles continuous dragging motion.
void	setDragState (glm::vec3 initHitPos) override
	Initializes the drag operation state.
glm::mat4	getModelMatrix () const override
	Gets the model transformation matrix for rendering this handle.
glm::vec3	getAxisDir () const override
	Gets the axis direction this handle operates along/around.
Public Member Functions inherited from IHandle
virtual	~IHandle ()=default
	Virtual destructor for proper cleanup of derived classes.

Additional Inherited Members
Protected Member Functions inherited from IHandle
	IHandle ()=default
	Protected constructor to enforce interface-only usage.
Static Protected Member Functions inherited from IHandle
static glm::mat4	rotateFromYToAxis (Axis axis)
	Computes rotation matrix to align mesh from +Y to target axis.

Detailed Description

Definition at line 5 of file ScaleHandle.h.

Constructor & Destructor Documentation

ScaleHandle()

ScaleHandle::ScaleHandle	(	SceneObject *	tgt,
		Axis	ax
	)

Definition at line 5 of file ScaleHandle.cpp.

Member Function Documentation

getAxisDir()

glm::vec3 ScaleHandle::getAxisDir ( ) const

inlineoverridevirtual

Gets the axis direction this handle operates along/around.

Returns

Unit vector representing the handle's axis direction.

Note

This is used for rendering (color coding) and for identifying which handle the user is interacting with.

Implements IHandle.

Definition at line 12 of file ScaleHandle.h.

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getModelMatrix()

glm::mat4 ScaleHandle::getModelMatrix ( ) const

overridevirtual

Gets the model transformation matrix for rendering this handle.

The model matrix encodes:

• Position: Target object's position
• Rotation: Aligned to the handle's axis
• Scale: Handle's visual size

Returns

The 4x4 model transformation matrix.

Note

This is used by Gizmo for instanced rendering of all handles.

Implements IHandle.

Definition at line 24 of file ScaleHandle.cpp.

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onDrag()

void ScaleHandle::onDrag ( const Math::Ray &  ray )

overridevirtual

Handles continuous dragging motion.

Called every frame while the handle is being dragged. Implementations should:

• Project the ray onto the handle's constraint space (axis/plane)
• Compute the transformation delta since drag started
• Apply the transformation to the target object

Parameters

ray	The current mouse ray in world space.

Note

This is called after setDragState() has initialized the drag.

See also

setDragState()

Implements IHandle.

Definition at line 7 of file ScaleHandle.cpp.

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setDragState()

void ScaleHandle::setDragState ( glm::vec3  initHitPos )

overridevirtual

Initializes the drag operation state.

Called once when the user begins dragging this handle. Implementations should capture:

• The initial hit position on the handle
• The target object's current transformation
• Any other state needed to compute relative deltas during onDrag()

Parameters

initHitPos

The world-space position where the ray first hit the handle.

See also

onDrag()

Implements IHandle.

Definition at line 19 of file ScaleHandle.cpp.

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

• src/graphics/components/ScaleHandle.h
• src/graphics/components/ScaleHandle.cpp