From d2d8d311013e13a7aec74ce0d9c914bc1dac354d Mon Sep 17 00:00:00 2001
From: Marcel Romagnuolo <marcello.r@gmx.net>
Date: Sat, 29 Jun 2024 14:51:27 +0200
Subject: [PATCH] implement filter for angled ftilts

---
 src/input_filter.rs | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/src/input_filter.rs b/src/input_filter.rs
index 3a8c93b..3e000e8 100644
--- a/src/input_filter.rs
+++ b/src/input_filter.rs
@@ -7,6 +7,10 @@ use crate::{
 
 /**
  * Houses functionality for modifying GCC state before it is sent to the console.
+ *
+ * General info for implementing filters on the sticks:
+ * X and Y values of a stick go each from 0 to 255.
+ * 127.5 is the middle value and when both X and Y are 127.5 the stick is in neutral position.
  */
 
 pub trait InputFilter: Sized {
@@ -100,6 +104,33 @@ impl InputFilter for CStickUpTiltFilter {
     }
 }
 
+/// Improves hitting up/down angled forward tilt at the cost
+/// of making it impossible to hit turnaround up & down tilt
+/// and making it slightly harder to hit regular forward tilt.
+pub struct CStickAngledFTiltFilter;
+
+impl InputFilter for CStickAngledFTiltFilter {
+    fn apply_filter(&mut self, gcc_state: &mut GcReport) {
+        if gcc_state.cstick_y > 147 {
+            if (147..=225).contains(&gcc_state.cstick_x) {
+                gcc_state.cstick_x = 205;
+                gcc_state.cstick_y = 205;
+            } else if (30..=107).contains(&gcc_state.cstick_x) {
+                gcc_state.cstick_x = 50;
+                gcc_state.cstick_y = 205;
+            }
+        } else if gcc_state.cstick_y < 107 {
+            if (147..=225).contains(&gcc_state.cstick_x) {
+                gcc_state.cstick_x = 205;
+                gcc_state.cstick_y = 50;
+            } else if (30..=107).contains(&gcc_state.cstick_x) {
+                gcc_state.cstick_x = 50;
+                gcc_state.cstick_y = 50;
+            }
+        }
+    }
+}
+
 /// Does nothing.
 #[derive(Default)]
 pub struct DummyFilter;