git subrepo clone https://github.com/HarbourMasters/soh.git

subrepo:
  subdir:   "soh"
  merged:   "ba904bbd0"
upstream:
  origin:   "https://github.com/HarbourMasters/soh.git"
  branch:   "master"
  commit:   "ba904bbd0"
git-subrepo:
  version:  "0.4.1"
  origin:   "???"
  commit:   "???"

soh/src/code/code_8006C510.c

@@ -0,0 +1,40 @@
+#include "global.h"
+
+f32 func_8006C510(f32 arg0, f32 arg1, f32 arg2, f32 arg3, f32 arg4, f32 arg5) {
+    char pad[0x1C];
+    f32 sq = SQ(arg0);
+    f32 cube = sq * arg0;
+
+    return (((cube + cube) - sq * 3.0f) + 1.0f) * arg2 + (sq * 3.0f - (cube + cube)) * arg3 +
+           ((cube - (sq + sq)) + arg0) * arg4 * arg1 + (cube - sq) * arg5 * arg1;
+}
+
+f32 func_8006C5A8(f32 target, TransformData* transData, s32 refIdx) {
+    s32 i;
+    s32 j;
+
+    if (target <= transData->unk_02) {
+        return transData->unk_08;
+    }
+    if (target >= transData[refIdx - 1].unk_02) {
+        return transData[refIdx - 1].unk_08;
+    }
+
+    for (i = 0;; i++) {
+        j = i + 1;
+        if (transData[j].unk_02 > target) {
+            if (transData[i].unk_00 & 1) {
+                return transData[i].unk_08;
+            } else if (transData[i].unk_00 & 2) {
+                return transData[i].unk_08 +
+                       ((target - (f32)transData[i].unk_02) / ((f32)transData[j].unk_02 - (f32)transData[i].unk_02)) *
+                           (transData[j].unk_08 - transData[i].unk_08);
+            } else {
+                f32 diff = (f32)transData[j].unk_02 - (f32)transData[i].unk_02;
+                return func_8006C510((target - transData[i].unk_02) / ((f32)transData[j].unk_02 - transData[i].unk_02),
+                                     diff * (1.0f / 30.0f), transData[i].unk_08, transData[j].unk_08,
+                                     transData[i].unk_06, transData[j].unk_04);
+            }
+        }
+    }
+}