345 lines
13 KiB
C#
345 lines
13 KiB
C#
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// 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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#if UNITY_INPUT_SYSTEM_ENABLE_XR && (ENABLE_VR || UNITY_GAMECORE) && !UNITY_FORCE_INPUTSYSTEM_XR_OFF
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using System;
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using System.Collections.Generic;
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using UnityEngine.InputSystem.LowLevel;
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using UnityEngine.InputSystem.Utilities;
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using System.Text;
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using UnityEngine.InputSystem.Layouts;
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using UnityEngine.XR;
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namespace UnityEngine.InputSystem.XR
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{
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internal class XRLayoutBuilder
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{
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private string parentLayout;
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private string interfaceName;
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private XRDeviceDescriptor descriptor;
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private static uint GetSizeOfFeature(XRFeatureDescriptor featureDescriptor)
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{
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switch (featureDescriptor.featureType)
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{
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case FeatureType.Binary:
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return sizeof(byte);
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case FeatureType.DiscreteStates:
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return sizeof(int);
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case FeatureType.Axis1D:
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return sizeof(float);
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case FeatureType.Axis2D:
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return sizeof(float) * 2;
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case FeatureType.Axis3D:
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return sizeof(float) * 3;
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case FeatureType.Rotation:
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return sizeof(float) * 4;
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case FeatureType.Hand:
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return sizeof(uint) * 26;
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case FeatureType.Bone:
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return sizeof(uint) + (sizeof(float) * 3) + (sizeof(float) * 4);
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case FeatureType.Eyes:
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return (sizeof(float) * 3) * 3 + ((sizeof(float) * 4) * 2) + (sizeof(float) * 2);
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case FeatureType.Custom:
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return featureDescriptor.customSize;
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}
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return 0;
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}
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private static string SanitizeString(string original, bool allowPaths = false)
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{
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var stringLength = original.Length;
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var sanitizedName = new StringBuilder(stringLength);
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for (var i = 0; i < stringLength; i++)
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{
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var letter = original[i];
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if (char.IsUpper(letter) || char.IsLower(letter) || char.IsDigit(letter) || letter == '_' || (allowPaths && (letter == '/')))
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{
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sanitizedName.Append(letter);
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}
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}
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return sanitizedName.ToString();
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}
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internal static string OnFindLayoutForDevice(ref InputDeviceDescription description, string matchedLayout,
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InputDeviceExecuteCommandDelegate executeCommandDelegate)
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{
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// If the device isn't a XRInput, we're not interested.
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if (description.interfaceName != XRUtilities.InterfaceCurrent && description.interfaceName != XRUtilities.InterfaceV1)
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{
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return null;
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}
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// If the description doesn't come with a XR SDK descriptor, we're not
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// interested either.
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if (string.IsNullOrEmpty(description.capabilities))
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{
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return null;
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}
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// Try to parse the XR descriptor.
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XRDeviceDescriptor deviceDescriptor;
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try
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{
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deviceDescriptor = XRDeviceDescriptor.FromJson(description.capabilities);
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}
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catch (Exception)
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{
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return null;
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}
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if (deviceDescriptor == null)
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{
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return null;
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}
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if (string.IsNullOrEmpty(matchedLayout))
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{
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const InputDeviceCharacteristics controllerCharacteristics = InputDeviceCharacteristics.HeldInHand | InputDeviceCharacteristics.Controller;
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if ((deviceDescriptor.characteristics & InputDeviceCharacteristics.HeadMounted) != 0)
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matchedLayout = "XRHMD";
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else if ((deviceDescriptor.characteristics & controllerCharacteristics) == controllerCharacteristics)
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matchedLayout = "XRController";
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}
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string layoutName;
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if (string.IsNullOrEmpty(description.manufacturer))
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{
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layoutName = $"{SanitizeString(description.interfaceName)}::{SanitizeString(description.product)}";
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}
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else
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{
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layoutName =
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$"{SanitizeString(description.interfaceName)}::{SanitizeString(description.manufacturer)}::{SanitizeString(description.product)}";
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}
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var layout = new XRLayoutBuilder { descriptor = deviceDescriptor, parentLayout = matchedLayout, interfaceName = description.interfaceName };
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InputSystem.RegisterLayoutBuilder(() => layout.Build(), layoutName, matchedLayout);
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return layoutName;
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}
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private static string ConvertPotentialAliasToName(InputControlLayout layout, string nameOrAlias)
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{
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var internedNameOrAlias = new InternedString(nameOrAlias);
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var controls = layout.controls;
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for (var i = 0; i < controls.Count; i++)
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{
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var controlItem = controls[i];
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if (controlItem.name == internedNameOrAlias)
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return nameOrAlias;
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var aliases = controlItem.aliases;
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for (var j = 0; j < aliases.Count; j++)
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{
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if (aliases[j] == nameOrAlias)
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return controlItem.name.ToString();
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}
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}
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return nameOrAlias;
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}
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private bool IsSubControl(string name)
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{
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return name.Contains('/');
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}
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private string GetParentControlName(string name)
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{
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int idx = name.IndexOf('/');
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return name.Substring(0, idx);
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}
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static readonly string[] poseSubControlNames =
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{
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"/isTracked",
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"/trackingState",
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"/position",
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"/rotation",
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"/velocity",
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"/angularVelocity"
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};
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static readonly FeatureType[] poseSubControlTypes =
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{
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FeatureType.Binary,
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FeatureType.DiscreteStates,
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FeatureType.Axis3D,
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FeatureType.Rotation,
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FeatureType.Axis3D,
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FeatureType.Axis3D
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};
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// A PoseControl consists of 6 subcontrols with specific names and types
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private bool IsPoseControl(List<XRFeatureDescriptor> features, int startIndex)
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{
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for (var i = 0; i < 6; i++)
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{
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if (!features[startIndex + i].name.EndsWith(poseSubControlNames[i]) ||
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features[startIndex + i].featureType != poseSubControlTypes[i])
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return false;
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}
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return true;
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}
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private InputControlLayout Build()
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{
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var builder = new InputControlLayout.Builder
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{
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stateFormat = new FourCC('X', 'R', 'S', '0'),
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extendsLayout = parentLayout,
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updateBeforeRender = true
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};
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var inheritedLayout = !string.IsNullOrEmpty(parentLayout)
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? InputSystem.LoadLayout(parentLayout)
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: null;
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var parentControls = new List<string>();
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var currentUsages = new List<string>();
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uint currentOffset = 0;
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for (var i = 0; i < descriptor.inputFeatures.Count; i++)
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{
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var feature = descriptor.inputFeatures[i];
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currentUsages.Clear();
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if (feature.usageHints != null)
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{
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foreach (var usageHint in feature.usageHints)
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{
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if (!string.IsNullOrEmpty(usageHint.content))
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currentUsages.Add(usageHint.content);
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}
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}
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var featureName = feature.name;
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featureName = SanitizeString(featureName, true);
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if (inheritedLayout != null)
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featureName = ConvertPotentialAliasToName(inheritedLayout, featureName);
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featureName = featureName.ToLower();
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if (IsSubControl(featureName))
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{
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string parentControl = GetParentControlName(featureName);
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if (!parentControls.Contains(parentControl))
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{
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if (IsPoseControl(descriptor.inputFeatures, i))
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{
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builder.AddControl(parentControl)
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.WithLayout("Pose")
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.WithByteOffset(0);
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parentControls.Add(parentControl);
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}
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}
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}
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uint nextOffset = GetSizeOfFeature(feature);
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if (interfaceName == XRUtilities.InterfaceV1)
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{
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#if UNITY_ANDROID
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if (nextOffset < 4)
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nextOffset = 4;
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#endif
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}
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else
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{
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if (nextOffset >= 4 && (currentOffset % 4 != 0))
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currentOffset += (4 - (currentOffset % 4));
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}
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switch (feature.featureType)
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{
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case FeatureType.Binary:
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{
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builder.AddControl(featureName)
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.WithLayout("Button")
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.WithByteOffset(currentOffset)
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.WithFormat(InputStateBlock.FormatBit)
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.WithUsages(currentUsages);
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break;
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}
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case FeatureType.DiscreteStates:
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{
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builder.AddControl(featureName)
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.WithLayout("Integer")
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.WithByteOffset(currentOffset)
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.WithFormat(InputStateBlock.FormatInt)
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.WithUsages(currentUsages);
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break;
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}
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case FeatureType.Axis1D:
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{
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builder.AddControl(featureName)
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.WithLayout("Analog")
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.WithRange(-1, 1)
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.WithByteOffset(currentOffset)
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.WithFormat(InputStateBlock.FormatFloat)
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.WithUsages(currentUsages);
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break;
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}
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case FeatureType.Axis2D:
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{
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builder.AddControl(featureName)
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.WithLayout("Vector2")
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.WithByteOffset(currentOffset)
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.WithFormat(InputStateBlock.FormatVector2)
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.WithUsages(currentUsages);
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builder.AddControl(featureName + "/x")
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.WithLayout("Analog")
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.WithRange(-1, 1);
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builder.AddControl(featureName + "/y")
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.WithLayout("Analog")
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.WithRange(-1, 1);
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break;
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}
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case FeatureType.Axis3D:
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{
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builder.AddControl(featureName)
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.WithLayout("Vector3")
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.WithByteOffset(currentOffset)
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.WithFormat(InputStateBlock.FormatVector3)
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.WithUsages(currentUsages);
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break;
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}
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case FeatureType.Rotation:
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{
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builder.AddControl(featureName)
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.WithLayout("Quaternion")
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.WithByteOffset(currentOffset)
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.WithFormat(InputStateBlock.FormatQuaternion)
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.WithUsages(currentUsages);
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break;
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}
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case FeatureType.Hand:
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{
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break;
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}
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case FeatureType.Bone:
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{
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builder.AddControl(featureName)
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.WithLayout("Bone")
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.WithByteOffset(currentOffset)
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.WithUsages(currentUsages);
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break;
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}
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case FeatureType.Eyes:
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{
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builder.AddControl(featureName)
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.WithLayout("Eyes")
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.WithByteOffset(currentOffset)
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.WithUsages(currentUsages);
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break;
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}
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}
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currentOffset += nextOffset;
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}
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return builder.Build();
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}
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}
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}
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#endif
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