（十一）自定义VrInputModule

1.前言

本文基于InputModule的逻辑，根据VR的操作特点，写一个VrInputModule。

2.Input

虚拟一个Input类，来获取最基本的信息，如下代码所示（示意代码）：

using UnityEngine;
using System.Collections; public class GazeInput : MonoBehaviour { public Vector2 GetGazePosition() { return new Vector2(Screen.width/2, Screen.height/2); } public Vector2 GetGazeDelta() { //TODO:Get position delta or rotation delta; return new Vector2(0, 0); } } 

3.自定义InputModule

using System.Collections;
using System.Collections.Generic; using UnityEngine; using UnityEngine.EventSystems; public class GazeInputModule : BaseInputModule { [SerializeField] private float dragThreshold = 10; private PointerEventData pointer; private GazeInput gaze; private GazeInput gazeInput { get { if (gaze == null) { gaze = GetComponent<GazeInput>(); } return gaze; } } private PointerEventData GetGazePointerEventData(out bool pressed,out bool released) { if (pointer == null) { pointer = new PointerEventData(eventSystem); pointer.dragging = false; } pressed = PressedThisFrame(); released = ReleasedThisFrame(); pointer.position = gazeInput.GetGazePosition(); pointer.delta = gazeInput.GetGazeDelta(); eventSystem.RaycastAll(pointer, m_RaycastResultCache); pointer.pointerCurrentRaycast = FindFirstRaycast(m_RaycastResultCache); m_RaycastResultCache.Clear(); return pointer; } private void ProcessGazePress(PointerEventData pointerData, bool pressed, bool released) { GameObject currentOverGo = pointerData.pointerCurrentRaycast.gameObject; if (pressed) { pointerData.eligibleForClick = true; pointer.dragging = false; pointerData.pressPosition = pointerData.position; pointerData.pointerPressRaycast = pointerData.pointerCurrentRaycast; //Selected and deselected event are neglected GameObject newPressed = ExecuteEvents.ExecuteHierarchy(currentOverGo, pointerData, ExecuteEvents.pointerDownHandler); if (newPressed == null) { newPressed = ExecuteEvents.GetEventHandler<IPointerClickHandler>(currentOverGo); } pointerData.pointerPress = newPressed; pointerData.rawPointerPress = currentOverGo; pointerData.pointerDrag = ExecuteEvents.GetEventHandler<IDragHandler>(currentOverGo); if (pointerData.pointerDrag != null) { ExecuteEvents.Execute(pointerData.pointerDrag, pointerData, ExecuteEvents.initializePotentialDrag); } } if (released) { ExecuteEvents.Execute(pointerData.pointerPress, pointerData, ExecuteEvents.pointerUpHandler); GameObject pointerClickHandler = ExecuteEvents.GetEventHandler<IPointerClickHandler>(currentOverGo); if (pointerData.pointerPress == pointerClickHandler && pointerData.eligibleForClick) { ExecuteEvents.Execute(pointerData.pointerPress, pointerData, ExecuteEvents.pointerClickHandler); } else if(pointerData.pointerDrag != null && pointerData.dragging) { ExecuteEvents.ExecuteHierarchy(currentOverGo, pointerData, ExecuteEvents.dropHandler); } pointerData.eligibleForClick = false; pointerData.pointerPress = null; pointerData.rawPointerPress = null; if (pointerData.pointerDrag != null && pointerData.dragging) ExecuteEvents.Execute(pointerData.pointerDrag, pointerData, ExecuteEvents.endDragHandler); pointerData.dragging = false; pointerData.pointerDrag = null; if (currentOverGo != pointerData.pointerEnter) { HandlePointerExitAndEnter(pointerData, null); HandlePointerExitAndEnter(pointerData, currentOverGo); } } } private void ProcessMove(PointerEventData pointerData) { HandlePointerExitAndEnter(pointerData, pointerData.pointerCurrentRaycast.gameObject); } private void ProcessDrag(PointerEventData pointerData) { if (!ShoundProcessDrag(pointerData)) return; if (!pointerData.dragging) { ExecuteEvents.Execute(pointerData.pointerDrag, pointerData, ExecuteEvents.beginDragHandler); pointerData.dragging = true; } if (pointerData.dragging) { if (pointerData.pointerPress != pointerData.pointerDrag) { ExecuteEvents.Execute(pointerData.pointerPress, pointerData, ExecuteEvents.pointerUpHandler); pointerData.eligibleForClick = false; pointerData.pointerPress = null; pointerData.rawPointerPress = null; } ExecuteEvents.Execute(pointerData.pointerDrag, pointerData, ExecuteEvents.dragHandler); } } public override void Process() { bool pressed, released; PointerEventData eventData = GetGazePointerEventData(out pressed, out released); ProcessGazePress(eventData, pressed, released); if (!eventData.dragging) { ProcessMove(eventData); } if (!released) { ProcessDrag(eventData); } } private bool PressedThisFrame() { return Input.GetKeyDown(KeyCode.KeypadEnter); } private bool ReleasedThisFrame() { return Input.GetKeyUp(KeyCode.KeypadEnter); ; } private bool ShoundProcessDrag(PointerEventData pointerData) { return Mathf.Abs(pointerData.delta.x) > dragThreshold || Mathf.Abs(pointerData.delta.y) > dragThreshold; } } 

4.结语

强迫症晚期，没有结语。。。。。。。。