1 files changed, 137 insertions, 0 deletions
diff --git a/SetLetters.cs b/SetLetters.cs
new file mode 100644
index 0000000..c14fe31
--- /dev/null
+++ b/SetLetters.cs
@@ -0,0 +1,137 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+// Expands a list of 4-byte parameters into a longer list of (effectively)
+// 1-byte parameters. The 1-byte parameters are easier to use in an animation
+// layer, since we can write conditions for them.
+[SharedBetweenAnimators]
+public class SetLetters : StateMachineBehaviour
+{
+  Dictionary<string, int> letters_;
+  List<string> cell_parameters_;
+  List<string> group_parameters_;
+
+  int GetLetterFromGroup(int g, int which)
+  {
+    return (((g & (0x000000FF << (which * 8))) >> (which * 8)) & 0x000000FF);
+  }
+
+  // This function is called in 2 contexts:
+  // 1. animator.parameters contains everything we need. Updating params is not
+  //    reflected in emulator.
+  // 2. animator.parameters contains nothing we need. Updating params is
+  //    reflected in emulator.
+  override public void OnStateUpdate(Animator animator, AnimatorStateInfo stateInfo, int layerIndex)
+  {
+    if (letters_ == null) {
+      letters_ = new Dictionary<string, int>();
+    }
+
+    // I don't know why or how but Unity fucking refuses to save this variable,
+    // so reinitialize it every time, YOLO.
+    cell_parameters_ = new List<string> {
+      "_Letter_Row00_Col00",
+        "_Letter_Row00_Col01",
+        "_Letter_Row00_Col02",
+        "_Letter_Row00_Col03",
+        "_Letter_Row00_Col04",
+        "_Letter_Row00_Col05",
+        "_Letter_Row00_Col06",
+        "_Letter_Row00_Col07",
+        "_Letter_Row00_Col08",
+        "_Letter_Row00_Col09",
+        "_Letter_Row00_Col10",
+        "_Letter_Row00_Col11",
+        "_Letter_Row00_Col12",
+        "_Letter_Row00_Col13",
+        "_Letter_Row01_Col00",
+        "_Letter_Row01_Col01",
+        "_Letter_Row01_Col02",
+        "_Letter_Row01_Col03",
+        "_Letter_Row01_Col04",
+        "_Letter_Row01_Col05",
+        "_Letter_Row01_Col06",
+        "_Letter_Row01_Col07",
+        "_Letter_Row01_Col08",
+        "_Letter_Row01_Col09",
+        "_Letter_Row01_Col10",
+        "_Letter_Row01_Col11",
+        "_Letter_Row01_Col12",
+        "_Letter_Row01_Col13",
+        "_Letter_Row02_Col00",
+        "_Letter_Row02_Col01",
+        "_Letter_Row02_Col02",
+        "_Letter_Row02_Col03",
+        "_Letter_Row02_Col04",
+        "_Letter_Row02_Col05",
+        "_Letter_Row02_Col06",
+        "_Letter_Row02_Col07",
+        "_Letter_Row02_Col08",
+        "_Letter_Row02_Col09",
+        "_Letter_Row02_Col10",
+        "_Letter_Row02_Col11",
+        "_Letter_Row02_Col12",
+        "_Letter_Row02_Col13",
+    };
+    group_parameters_ = new List<string> {
+      "_Letter_Row00_Col00_03",
+        "_Letter_Row00_Col04_07",
+        "_Letter_Row00_Col08_11",
+        "_Letter_Row00_Col12_13",
+        "_Letter_Row01_Col00_03",
+        "_Letter_Row01_Col04_07",
+        "_Letter_Row01_Col08_11",
+        "_Letter_Row01_Col12_13",
+        "_Letter_Row02_Col00_03",
+        "_Letter_Row02_Col04_07",
+        "_Letter_Row02_Col08_11",
+        "_Letter_Row02_Col12_13",
+    };
+
+    bool got_match = false;
+    foreach (var param in animator.parameters) {
+      if (param.name == "_Letter_Row00_Col00_03") {
+        got_match = true;
+        break;
+      }
+    }
+    if (!got_match) {
+      if (!letters_.ContainsKey(cell_parameters_[0])) {
+        return;
+      }
+      foreach (var param in cell_parameters_) {
+        animator.SetInteger(param, letters_[param]);
+      }
+      
+      return;
+    }
+
+    int cell_idx = 0;
+    for (int i = 0; i < group_parameters_.Count; i++) {
+      string group_param = group_parameters_[i];
+      int g = animator.GetInteger(group_param);
+
+      string cell_param = cell_parameters_[cell_idx];
+      letters_[cell_param] = GetLetterFromGroup(g, 0);
+      cell_idx += 1;
+
+      cell_param = cell_parameters_[cell_idx];
+      letters_[cell_param] = GetLetterFromGroup(g, 1);
+      cell_idx += 1;
+
+      // If we're on the last group of 4 in a row, we do not look at the cells,
+      // since there are only 14 cells in each row.
+      if (i % 4 != 3) {
+        cell_param = cell_parameters_[cell_idx];
+        letters_[cell_param] = GetLetterFromGroup(g, 2);
+        cell_idx += 1;
+
+        cell_param = cell_parameters_[cell_idx];
+        letters_[cell_param] = GetLetterFromGroup(g, 3);
+        cell_idx += 1;
+      }
+    }
+  }
+}