Feature: gyroscope controls

Natives/CMakeLists.txt

@@ -100,6 +100,7 @@ add_executable(PojavLauncher
   external/TOInsetGroupedTableView/TOInsetGroupedTableView/TOInsetGroupedTableView.m
 
   input/ControllerInput.m
+  input/GyroInput.m
   input/KeyboardInput.m
 
   AccountListViewController.m
@@ -143,6 +144,7 @@ target_link_libraries(PojavLauncher
   "-framework CAltKit"
   "-framework CoreGraphics"
   "-framework CoreImage"
+  "-framework CoreMotion"
   "-framework CoreServices"
   "-framework GameController"
   "-framework QuartzCore"

Natives/LauncherPreferences.m

@@ -122,6 +122,9 @@ void loadPreferences(BOOL reset) {
     setDefaultValueForPref(envPrefDict, @"press_duration", @(400));
     setDefaultValueForPref(envPrefDict, @"mouse_scale", @(100));
     setDefaultValueForPref(envPrefDict, @"mouse_speed", @(100));
+    setDefaultValueForPref(envPrefDict, @"gyroscope_enable", @NO);
+    setDefaultValueForPref(envPrefDict, @"gyroscope_invert_x_axis", @NO);
+    setDefaultValueForPref(envPrefDict, @"gyroscope_sensitivity", @(100));
     setDefaultValueForPref(envPrefDict, @"default_ctrl", @"default.json");
     setDefaultValueForPref(envPrefDict, @"game_directory", @"default");
     setDefaultValueForPref(envPrefDict, @"java_args", @"");

Natives/LauncherPreferencesViewController.m

@@ -259,6 +259,32 @@ typedef void(^CreateView)(UITableViewCell *, NSString *, NSDictionary *);
                 @"hasDetail": @YES,
                 @"icon": @"slider.horizontal.below.rectangle",
                 @"type": self.typeSwitch
+            },
+            @{@"key": @"gyroscope_enable",
+                @"hasDetail": @YES,
+                @"icon": @"gyroscope",
+                @"type": self.typeSwitch,
+                @"enableCondition": ^BOOL(){
+                    return realUIIdiom != UIUserInterfaceIdiomTV;
+                }
+            },
+            @{@"key": @"gyroscope_invert_x_axis",
+                @"hasDetail": @YES,
+                @"icon": @"arrow.left.and.right",
+                @"type": self.typeSwitch,
+                @"enableCondition": ^BOOL(){
+                    return realUIIdiom != UIUserInterfaceIdiomTV;
+                }
+            },
+            @{@"key": @"gyroscope_sensitivity",
+                @"hasDetail": @YES,
+                @"icon": @"move.3d",
+                @"type": self.typeSlider,
+                @"min": @(50),
+                @"max": @(300),
+                @"enableCondition": ^BOOL(){
+                    return realUIIdiom != UIUserInterfaceIdiomTV;
+                }
             }
         ], @[
         // Java tweaks

Natives/SurfaceViewController.m

@@ -12,6 +12,7 @@
 #import "customcontrols/CustomControlsUtils.h"
 
 #import "input/ControllerInput.h"
+#import "input/GyroInput.h"
 #import "input/KeyboardInput.h"
 
 #import "JavaLauncher.h"
@@ -79,7 +80,11 @@ BOOL slideableHotbar;
     }
 
     // Perform Gamepad joystick ticking, while also controlling frame rate?
-    CADisplayLink *displayLink = [CADisplayLink displayLinkWithTarget:ControllerInput.class selector:@selector(tick)];
+    id tickInput = ^{
+        [GyroInput tick];
+        [ControllerInput tick];
+    };
+    CADisplayLink *displayLink = [CADisplayLink displayLinkWithTarget:tickInput selector:@selector(invoke)];
     if (@available(iOS 15.0, tvOS 15.0, *)) {
         displayLink.preferredFrameRateRange = CAFrameRateRangeMake(60, 120, 120);
     }
@@ -289,6 +294,11 @@ BOOL slideableHotbar;
         self.inputTextField.autocorrectionType = UITextAutocorrectionTypeNo;
     }
 
+    BOOL gyroEnabled = [getPreference(@"gyroscope_enable") boolValue];
+    BOOL gyroInvertX = [getPreference(@"gyroscope_invert_x_axis") boolValue];
+    int gyroSensitivity = [getPreference(@"gyroscope_sensitivity") intValue];
+    [GyroInput updateSensitivity:gyroEnabled?gyroSensitivity:0 invertXAxis:gyroInvertX];
+
     self.mouseSpeed = [getPreference(@"mouse_speed") floatValue] / 100.0;
     slideableHotbar = [getPreference(@"slideable_hotbar") boolValue];
 
@@ -450,7 +460,21 @@ BOOL slideableHotbar;
         }
         lastVirtualMousePoint = location;
     }
-    callback_SurfaceViewController_onTouch(event, location.x * screenScale, location.y * screenScale);
+
+    CGFloat x = location.x;
+    CGFloat y = location.y;
+    switch (event) {
+        case ACTION_DOWN:
+            lastVirtualMousePoint = location;
+            break;
+        case ACTION_MOVE:
+            event = ACTION_MOVE_MOTION;
+            x = location.x - lastVirtualMousePoint.x;
+            y = location.y - lastVirtualMousePoint.y;
+            lastVirtualMousePoint = location;
+            break;
+    }
+    callback_SurfaceViewController_onTouch(event, x * screenScale, y * screenScale);
 }
 
 #pragma mark - Input: on-surface functions

Natives/en.lproj/Localizable.strings

@@ -189,6 +189,14 @@
 "preference.detail.virtmouse_enable" = "Enable this option to start with virtual mouse on";
 "preference.title.slideable_hotbar" = "Slideable hotbar";
 "preference.detail.slideable_hotbar" = "Make the hotbar slideable like the mouse wheel";
+
+"preference.title.gyroscope_enable" = "Enable gyroscope controls";
+"preference.detail.gyroscope_enable" = "Enabling this will allow you to turn in game by turning your device";
+"preference.title.gyroscope_invert_x_axis" = "Invert gyroscope left and right";
+"preference.detail.gyroscope_invert_x_axis" = "Inverts the X-axis of the gyroscope";
+"preference.title.gyroscope_sensitivity" = "Gyroscope controls sensitivity";
+"preference.detail.gyroscope_sensitivity" = "Adjust the sensitivity of gyroscope controls";
+
 "preference.title.java_home" = "Use Java 17 for Minecraft < 1.17";
 "preference.detail.java_home" = "Java 8 is used by default for those versions. Enable this option to force use Java 17, however compatibility with modded is not guaranteed.";
 "preference.title.java_args" = "JVM Launch arguments";

Natives/input/ControllerInput.m

@@ -245,7 +245,7 @@ BOOL leftShiftHeld;
         // Compute delta since last tick time
         CGFloat deltaX = lastXValue * acceleration * 18;
         CGFloat deltaY = -lastYValue * acceleration * 18;
-        CGFloat deltaTimeScale = (frameTime - lastFrameTime) / 0.016666666; // Scale of 1 = 60Hz
+        CGFloat deltaTimeScale = (frameTime - lastFrameTime) / (1.0/60.0); // Scale of 1 = 60Hz
         deltaX *= deltaTimeScale;
         deltaY *= deltaTimeScale;
 

Natives/input/GyroInput.h

@@ -0,0 +1,8 @@
+#import <Foundation/Foundation.h>
+
+@interface GyroInput : NSObject
+
++ (void)updateSensitivity:(int)sensitivity invertXAxis:(BOOL)invertX;
++ (void)tick;
+
+@end

Natives/input/GyroInput.m

@@ -0,0 +1,48 @@
+#import <CoreMotion/CoreMotion.h>
+#import <UIKit/UIKit.h>
+#import "GyroInput.h"
+#import "../SurfaceViewController.h"
+#import "../utils.h"
+
+@implementation GyroInput
+
+static CGFloat lastXValue, lastYValue, lastFrameTime;
+static CGFloat gyroSensitivity;
+static int gyroInvertX;
+static CMMotionManager* cmInstance;
+
++ (void)updateSensitivity:(int)sensitivity invertXAxis:(BOOL)invertX {
+    if (cmInstance == nil) {
+        cmInstance = [[CMMotionManager alloc] init];
+    }
+    gyroSensitivity = sensitivity / 100.0;
+    if (sensitivity > 0) {
+        gyroInvertX = invertX ? 1 : -1;
+        [cmInstance startGyroUpdates];
+    } else {
+        [cmInstance stopGyroUpdates];
+    }
+}
+
++ (void)tick {
+    if (!isGrabbing || gyroSensitivity == 0) return;
+
+    // Compute delta since last tick time
+    CGFloat frameTime = CACurrentMediaTime();
+    CGFloat factor = gyroSensitivity;
+    if (lastFrameTime != 0) {
+        CGFloat deltaTimeScale = (frameTime - lastFrameTime) / (1.0/60.0); // Scale of 1 = 60Hz
+        factor *= deltaTimeScale;
+    }
+
+    // 100% sensitivity -> 1:1 ratio between real world and ingame camera
+    lastXValue = cmInstance.gyroData.rotationRate.x / (M_PI*360) * windowWidth * factor * gyroInvertX;
+    lastYValue = cmInstance.gyroData.rotationRate.y / (M_PI*180) * windowHeight * factor;
+
+    SurfaceViewController *vc = (id)(currentWindow().rootViewController);
+    [vc sendTouchPoint:CGPointMake(lastXValue, lastYValue) withEvent:ACTION_MOVE_MOTION];
+
+    lastFrameTime = frameTime;
+}
+
+@end