Working on it

Assets/CarbonInput/Scripts/TouchInput/BaseTouchInput.cs

@@ -0,0 +1,53 @@
+using UnityEngine;
+
+namespace CarbonInput {
+    /// <summary>
+    /// Base class for all touch controls.
+    /// </summary>
+    public class BaseTouchInput : MonoBehaviour {
+        /// <summary>
+        /// The index of the player this control belongs to. If set to Any, it will use the first free player.
+        /// </summary>
+        [Tooltip("The index of the player this control belongs to. If set to Any, it will use the first free player.")]
+        public PlayerIndex Index;
+        /// <summary>
+        /// Mapping of this control.
+        /// </summary>
+        protected TouchMapping Mapping;
+
+        /// <summary>
+        /// Initialize this input by injecting a <see cref="TouchMapping"/> into <see cref="GamePad.PlayerMappings"/>.
+        /// </summary>
+        protected void InitMapping() {
+            if(Index == PlayerIndex.Any) {
+                ControllerInstance[] mappings = GamePad.GetPlayerMappings();
+                for(int i = 1; i < CarbonController.PlayerIndices; i++) {
+                    if(mappings[i].Controller.Replacable || mappings[i].Controller is TouchMapping) {
+                        UseMapping(i);
+                        return;
+                    }
+                }
+                // all mappings already in use
+            } else {
+                UseMapping((int)Index);
+            }
+        }
+
+        /// <summary>
+        /// Changes index <paramref name="idx"/> of the <see cref="GamePad.PlayerMappings"/> to a <see cref="TouchMapping"/>.
+        /// </summary>
+        /// <param name="idx"></param>
+        private void UseMapping(int idx) {
+            ControllerInstance[] mappings = GamePad.GetPlayerMappings();
+            // if there is already a TouchMapping, use it.
+            if(mappings[idx] != null && mappings[idx].Controller is TouchMapping)
+                Mapping = (TouchMapping)mappings[idx].Controller;
+            else {//otherwise overwrite the old value
+                Mapping = ScriptableObject.CreateInstance<TouchMapping>();
+                mappings[idx] = new ControllerInstance(Mapping, 0);
+            }
+            // if we set PlayerIndex.One, we must also set PlayerIndex.Any, because AnyBehaviour.UseMappingOne needs this
+            if(idx == 1) mappings[0] = mappings[1];
+        }
+    }
+}