61 lines
2.0 KiB
C#
61 lines
2.0 KiB
C#
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using System;
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using Unity.Collections.LowLevel.Unsafe;
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using UnityEngine;
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using UnityEngine.InputSystem;
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using UnityEngine.InputSystem.LowLevel;
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namespace Unity.RenderStreaming
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{
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class InputPositionCorrector
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{
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public Rect inputRegion { set; get; }
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public Rect outputRegion { set; get; }
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private Action<InputEventPtr, InputDevice> _onEvent;
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public InputPositionCorrector(Action<InputEventPtr, InputDevice> onEvent)
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{
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_onEvent = onEvent;
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}
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public unsafe void Invoke(InputEventPtr ptr, InputDevice device)
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{
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// Allocate memory and copy InputEventPtr
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InputEventPtr dst = (InputEventPtr)
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UnsafeUtility.Malloc(ptr.sizeInBytes, 4, Collections.Allocator.Temp);
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UnsafeUtility.MemCpy(dst, ptr, ptr.sizeInBytes);
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// Mapping
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PointerMap((StateEvent*)dst.data, device);
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_onEvent?.Invoke(dst, device);
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// Free memory
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UnsafeUtility.Free(dst, Collections.Allocator.Temp);
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}
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unsafe void PointerMap(StateEvent* data, InputDevice device)
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{
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switch (device)
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{
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case Mouse mouse:
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MouseState* mouseState = (MouseState*)data->state;
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mouseState->position = Map(mouseState->position, inputRegion, outputRegion);
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break;
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case Touchscreen touch:
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// todo(kazuki): multi touch is not supported yet.
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TouchState* touchState = (TouchState*)data->state;
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touchState->position = Map(touchState->position, inputRegion, outputRegion);
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break;
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}
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}
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static Vector2 Map(Vector2 pos, Rect inputRegion, Rect outputRegion)
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{
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Vector2 normalized = Rect.PointToNormalized(inputRegion, pos);
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return Rect.NormalizedToPoint(outputRegion, normalized);
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}
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}
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}
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