ZoomOperator
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class HPS::ZoomOperator : public HPS::Operator
The ZoomOperator class defines an operator which allows the user to zoom the camera. This Operator works for both mouse- and touch-driven devices. Mouse-Driven Devices: Left button pressed and move: Zoom camera Touch-Driven Devices: Pinch: Zoom camera
Public Functions
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virtual bool OnMouseDown(MouseState const &in_state)
This function is called whenever HPS receives a MouseEvent that signals a mouse button was pressed. This function starts the operator and computes the position of the starting point.
- Parameters
in_state – A MouseState object describing the current mouse state.
- Returns
true if the input event was handled, false otherwise.
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virtual bool OnMouseMove(MouseState const &in_state)
This function is called whenever HPS receives a MouseEvent that signals the mouse moved This function zooms the camera as needed.
- Parameters
in_state – A MouseState object describing the current mouse state.
- Returns
true if the input event was handled, false otherwise.
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virtual bool OnMouseUp(MouseState const &in_state)
This function is called whenever HPS receives a MouseEvent that signals a mouse button was released. This function stops the operator.
- Parameters
in_state – A MouseState object describing the current mouse state.
- Returns
true if the input event was handled, false otherwise.
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virtual bool OnTouchDown(TouchState const &in_state)
This function is called whenever HPS receives a TouchEvent that signals the device was touched. This function starts the operator and computes the position of the starting point.
- Parameters
in_state – A TouchState object describing the current touch state.
- Returns
true if the input event was handled, false otherwise.
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virtual bool OnTouchMove(TouchState const &in_state)
This function is called whenever HPS receives a TouchEvent that signals a point of contact has moved. This function zooms the camera as needed.
- Parameters
in_state – A TouchState object describing the current touch state.
- Returns
true if the input event was handled, false otherwise.
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ZoomOperator(MouseButtons in_mouse_trigger = MouseButtons::ButtonLeft(), ModifierKeys in_modifier_trigger = ModifierKeys())
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virtual bool OnMouseDown(MouseState const &in_state)
