Unity獲取滑鼠滾輪資訊

ugui關於滑鼠滾輪資訊的獲取有乙個專門的介面iscrollhandler用於接收滾輪事件。繼承該事件之後便需要實現函式onscroll。

如下：

public

virtual
void
onscroll
(pointereventdata eventdata)

using system;

using system.collections.generic;
namespace unityengine.eventsystems
//// 摘要:
//     the camera associated with the last onpointerpress event.
public
camera presseventcamera 
//// 摘要:
//     the camera associated with the last onpointerenter event.
public
camera entereventcamera 
//// 摘要:
//     the eventsystems.pointereventdata.inputbutton for this event.
public
inputbutton button 
//// 摘要:
//     determines whether the user is dragging the mouse or trackpad.
public
bool dragging 
//// 摘要:
//     should a drag threshold be used?
public
bool usedragthreshold 
//// 摘要:
//     the amount of scroll since the last update.
public
vector2 scrolldelta 
//// 摘要:
//     number of clicks in a row.
public
int clickcount 
//// 摘要:
//     the last time a click event was sent.
public
float clicktime 
[obsolete
("use either pointercurrentraycast.worldnormal or pointerpressraycast.worldnormal")]
public
vector3 worldnormal 
[obsolete
("use either pointercurrentraycast.worldposition or pointerpressraycast.worldposition")]
public
vector3 worldposition 
//// 摘要:
//     the screen space coordinates of the last pointer click.
public
vector2 pressposition 
//// 摘要:
//     pointer delta since last update.
public
vector2 delta 
//// 摘要:
//     current pointer position.
public
vector2 position 
//// 摘要:
//     identification of the pointer.
public
int pointerid 
public
bool eligibleforclick 
//// 摘要:
//     raycastresult associated with the pointer press.
public
raycastresult pointerpressraycast 
//// 摘要:
//     raycastresult associated with the current event.
public
raycastresult pointercurrentraycast 
//// 摘要:
//     the object that is receiving ondrag.
public
gameobject pointerdrag 
//// 摘要:
public
gameobject rawpointerpress 
//// 摘要:
//     the gameobject for the last press event.
public
gameobject lastpress 
//// 摘要:
//     the object that received 'onpointerenter'.
public
gameobject pointerenter 
//// 摘要:
//     is the pointer moving.
//// 返回結果:
//     moving.
public
bool
ispointermoving()
;//// 摘要:
//     is scroll being used on the input device.
//// 返回結果:
//     scrolling.
public
bool
isscrolling()
;public
override
string
tostring()
;//// 摘要:
//     input press tracking.
public
enum inputbutton
//// 摘要:
//     the state of a press for the given frame.
public
enum framepressstate
}}

通過input獲取滾輪資訊的方式為input.getaxis("mouse scrollwheel")。

public

void
onupdate()

滾輪上滑為正，下滑為負；且滾輪的每個小格卡頓，其數值資訊表示為0.1，快速連續滾動時其數值會直接出現對應的數值，不會一格一格出現。

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