83 lines
2.8 KiB
C#
83 lines
2.8 KiB
C#
// ENABLE_VR is not defined on Game Core but the assembly is available with limited features when the XR module is enabled.
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// These are the guards that Input System uses to define the GetHapticCapabilitiesCommand class.
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#if ENABLE_VR || UNITY_GAMECORE
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#define INPUT_HAPTICS_AVAILABLE
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#endif
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using System.Collections.Generic;
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#if INPUT_HAPTICS_AVAILABLE
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using UnityEngine.InputSystem.XR.Haptics;
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#endif
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namespace UnityEngine.XR.Interaction.Toolkit.Inputs.Haptics
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{
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/// <summary>
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/// A haptic impulse channel group that uses input system commands to query the haptic capabilities of a device.
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/// </summary>
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public class HapticImpulseCommandChannelGroup : IXRHapticImpulseChannelGroup
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{
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/// <inheritdoc />
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public int channelCount => m_Channels.Count;
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readonly List<IXRHapticImpulseChannel> m_Channels = new List<IXRHapticImpulseChannel>();
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InputSystem.InputDevice m_Device;
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/// <inheritdoc />
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public IXRHapticImpulseChannel GetChannel(int channel = 0)
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{
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if (channel < 0)
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{
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Debug.LogError("Haptic channel can't be negative.");
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return null;
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}
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return channel < m_Channels.Count ? m_Channels[channel] : null;
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}
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/// <summary>
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/// Initialize the channel group with the given device.
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/// Does nothing if already initialized with the same device.
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/// </summary>
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/// <param name="device">The input device that haptic impulses should be sent to.</param>
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public void Initialize(InputSystem.InputDevice device)
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{
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if (m_Device == device)
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return;
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m_Device = device;
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m_Channels.Clear();
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if (device == null)
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return;
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#if INPUT_HAPTICS_AVAILABLE
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var command = GetHapticCapabilitiesCommand.Create();
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var result = device.ExecuteCommand(ref command);
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int numChannels;
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if (result < 0L)
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{
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Debug.LogWarning($"Failed to get haptic capabilities of {device}, error code {result}. Continuing assuming a single haptic channel.");
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numChannels = 1;
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}
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else
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{
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numChannels = (int)command.numChannels;
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}
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#else
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Debug.LogWarning($"Unable to get haptic capabilities of {device} on platform {Application.platform}. Continuing assuming a single haptic channel.");
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const int numChannels = 1;
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#endif
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for (var index = 0; index < numChannels; ++index)
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{
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m_Channels.Add(new HapticImpulseCommandChannel
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{
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motorChannel = index,
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device = device,
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});
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}
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}
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}
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}
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