Unify digital steering

.changes/unreleased/Changed-20240826-080222.yaml

@@ -0,0 +1,3 @@
+kind: Changed
+body: Steering is now smoother, especially on Android.
+time: 2024-08-26T08:02:22.121774707+02:00

core/src/com/agateau/pixelwheels/gameinput/TouchInputUtils.java → core/src/com/agateau/pixelwheels/gameinput/DigitalSteering.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2019 Aurélien Gâteau <[email protected]>
+ * Copyright 2024 Compl Yue
  *
  * This file is part of Pixel Wheels.
  *
@@ -19,18 +19,21 @@
 package com.agateau.pixelwheels.gameinput;
 
 import com.agateau.pixelwheels.GamePlay;
-import com.agateau.pixelwheels.racescreen.HudButton;
 import com.badlogic.gdx.math.MathUtils;
 
-class TouchInputUtils {
-    static float applyDirectionInput(HudButton leftButton, HudButton rightButton, float direction) {
-        if (leftButton.isPressed()) {
-            direction += GamePlay.instance.steeringStep;
-        } else if (rightButton.isPressed()) {
-            direction -= GamePlay.instance.steeringStep;
+public class DigitalSteering {
+    private float mRawDirection = 0;
+
+    public float steer(boolean left, boolean right) {
+        if (left == right) {
+            // Either both left & right are pressed or none of them are
+            mRawDirection *= 0.4;
+        } else if (left) {
+            mRawDirection += GamePlay.instance.steeringStep;
         } else {
-            direction = 0;
+            mRawDirection -= GamePlay.instance.steeringStep;
         }
-        return MathUtils.clamp(direction, -1, 1);
+        mRawDirection = MathUtils.clamp(mRawDirection, -1, 1);
+        return mRawDirection * mRawDirection * Math.signum(mRawDirection);
     }
 }

core/src/com/agateau/pixelwheels/gameinput/InputMapperInputHandler.java

@@ -19,18 +19,18 @@
 package com.agateau.pixelwheels.gameinput;
 
 import com.agateau.pixelwheels.Assets;
-import com.agateau.pixelwheels.GamePlay;
 import com.agateau.pixelwheels.bonus.Bonus;
+import com.agateau.pixelwheels.debug.DebugStringMap;
 import com.agateau.pixelwheels.racescreen.Hud;
 import com.agateau.ui.InputMapper;
 import com.agateau.ui.VirtualKey;
 import com.badlogic.gdx.Preferences;
-import com.badlogic.gdx.math.MathUtils;
 
 /** Base class for InputMapper-based GameInputHandlers */
 public abstract class InputMapperInputHandler implements GameInputHandler {
     private final InputMapper mInputMapper;
     private final GameInput mInput = new GameInput();
+    private final DigitalSteering mSteer = new DigitalSteering();
 
     InputMapperInputHandler(InputMapper inputMapper) {
         mInputMapper = inputMapper;
@@ -42,14 +42,11 @@ public GameInput getGameInput() {
                 mInputMapper.isKeyPressed(VirtualKey.DOWN)
                         || mInputMapper.isKeyPressed(VirtualKey.BACK);
         mInput.accelerating = !mInput.braking;
-        if (mInputMapper.isKeyPressed(VirtualKey.LEFT)) {
-            mInput.direction += GamePlay.instance.steeringStep;
-        } else if (mInputMapper.isKeyPressed(VirtualKey.RIGHT)) {
-            mInput.direction -= GamePlay.instance.steeringStep;
-        } else {
-            mInput.direction *= 0.4;
-        }
-        mInput.direction = MathUtils.clamp(mInput.direction, -1, 1);
+        mInput.direction =
+                mSteer.steer(
+                        mInputMapper.isKeyPressed(VirtualKey.LEFT),
+                        mInputMapper.isKeyPressed(VirtualKey.RIGHT));
+        DebugStringMap.putPercent("direction", (float) (Math.abs(mInput.direction)));
         mInput.triggeringBonus = mInputMapper.isKeyPressed(VirtualKey.TRIGGER);
 
         return mInput;

core/src/com/agateau/pixelwheels/gameinput/PieTouchInputHandler.java

@@ -32,6 +32,7 @@
 /** Handle input using pie buttons in the bottom left and right corners */
 public class PieTouchInputHandler implements GameInputHandler {
     private final GameInput mInput = new GameInput();
+    private final DigitalSteering mSteer = new DigitalSteering();
     private PieButton mLeftButton, mRightButton, mBrakeButton, mBonusButton;
 
     public static class Factory implements GameInputHandlerFactory {
@@ -61,8 +62,7 @@ public Array<GameInputHandler> getAllHandlers() {
     public GameInput getGameInput() {
         mInput.braking = mBrakeButton.isPressed();
         mInput.accelerating = !mInput.braking;
-        mInput.direction =
-                TouchInputUtils.applyDirectionInput(mLeftButton, mRightButton, mInput.direction);
+        mInput.direction = mSteer.steer(mLeftButton.isPressed(), mRightButton.isPressed());
         mInput.triggeringBonus = mBonusButton.isPressed();
         return mInput;
     }

core/src/com/agateau/pixelwheels/gameinput/SidesTouchInputHandler.java

@@ -32,6 +32,7 @@
 /** Handle input using buttons on the sides */
 public class SidesTouchInputHandler implements GameInputHandler {
     private final GameInput mInput = new GameInput();
+    private final DigitalSteering mSteer = new DigitalSteering();
     private HudButton mLeftButton, mRightButton, mBonusButton;
 
     public static class Factory implements GameInputHandlerFactory {
@@ -61,11 +62,7 @@ public Array<GameInputHandler> getAllHandlers() {
     public GameInput getGameInput() {
         mInput.braking = isBraking();
         mInput.accelerating = !mInput.braking;
-        if (!mInput.braking) {
-            mInput.direction =
-                    TouchInputUtils.applyDirectionInput(
-                            mLeftButton, mRightButton, mInput.direction);
-        }
+        mInput.direction = mSteer.steer(mLeftButton.isPressed(), mRightButton.isPressed());
         mInput.triggeringBonus = mBonusButton.isPressed();
         return mInput;
     }