From 4ed11b67e73503ad6089c6d20194365abe91625e Mon Sep 17 00:00:00 2001
From: TheBrokenRail <connor24nolan@live.com>
Date: Tue, 17 May 2022 18:31:25 -0400
Subject: [PATCH] Add Front-Facing View

---
 mods/src/input/toggle.c             | 42 ++++++++++++++++++++++++++++-
 symbols/include/symbols/minecraft.h |  5 ++++
 2 files changed, 46 insertions(+), 1 deletion(-)

diff --git a/mods/src/input/toggle.c b/mods/src/input/toggle.c
index 3a03041..70e2b88 100644
--- a/mods/src/input/toggle.c
+++ b/mods/src/input/toggle.c
@@ -29,9 +29,44 @@ static void _handle_toggle_options(unsigned char *minecraft) {
         hide_gui_toggle = 0;
         if (third_person_toggle % 2 != 0) {
             // Toggle Third Person
-            *(options + Options_third_person_property_offset) = *(options + Options_third_person_property_offset) ^ 1;
+            *(options + Options_third_person_property_offset) = (*(options + Options_third_person_property_offset) + 1) % 3;
         }
         third_person_toggle = 0;
+        // Fix Broken Value From Third-Person OptionsButton Toggle
+        // (Because Front-Facing Code Repurposes A Boolean As A Ternary)
+        if (*(options + Options_third_person_property_offset) == 3) {
+            *(options + Options_third_person_property_offset) = 0;
+        }
+    }
+}
+
+// Font-Facing View
+static void GameRenderer_setupCamera_injection(unsigned char *game_renderer, float param_1, int param_2) {
+    // Get Objects
+    unsigned char *minecraft = *(unsigned char **) (game_renderer + GameRenderer_minecraft_property_offset);
+    unsigned char *player = *(unsigned char **) (minecraft + Minecraft_player_property_offset);
+
+    // Check If In Third-Person
+    unsigned char *options = minecraft + Minecraft_options_property_offset;
+    int is_font_facing = (*(options + Options_third_person_property_offset) == 2);
+
+    // Invert Rotation
+    if (is_font_facing && player != NULL) {
+        *(float *) (player + Entity_yaw_property_offset) = 180.f + (*(float *) (player + Entity_yaw_property_offset));
+        *(float *) (player + Entity_old_yaw_property_offset) = 180.f + (*(float *) (player + Entity_old_yaw_property_offset));
+        *(float *) (player + Entity_pitch_property_offset) = -(*(float *) (player + Entity_pitch_property_offset));
+        *(float *) (player + Entity_old_pitch_property_offset) = -(*(float *) (player + Entity_old_pitch_property_offset));
+    }
+
+    // Call Original Method
+    (*GameRenderer_setupCamera)(game_renderer, param_1, param_2);
+
+    // Revert
+    if (is_font_facing && player != NULL) {
+        *(float *) (player + Entity_yaw_property_offset) = -180.f + (*(float *) (player + Entity_yaw_property_offset));
+        *(float *) (player + Entity_old_yaw_property_offset) = -180.f + (*(float *) (player + Entity_old_yaw_property_offset));
+        *(float *) (player + Entity_pitch_property_offset) = -(*(float *) (player + Entity_pitch_property_offset));
+        *(float *) (player + Entity_old_pitch_property_offset) = -(*(float *) (player + Entity_old_pitch_property_offset));
     }
 }
 
@@ -39,4 +74,9 @@ static void _handle_toggle_options(unsigned char *minecraft) {
 void _init_toggle() {
     enable_toggles = feature_has("Bind Common Toggleable Options To Function Keys", server_disabled);
     input_run_on_tick(_handle_toggle_options);
+
+    // Font-Facing View
+    if (enable_toggles) {
+        overwrite_calls((void *) GameRenderer_setupCamera, (void *) GameRenderer_setupCamera_injection);
+    }
 }
diff --git a/symbols/include/symbols/minecraft.h b/symbols/include/symbols/minecraft.h
index 169316b..1ab7128 100644
--- a/symbols/include/symbols/minecraft.h
+++ b/symbols/include/symbols/minecraft.h
@@ -202,6 +202,9 @@ static uint32_t Minecraft_perf_renderer_property_offset = 0xcbc; // PerfRenderer
 typedef void (*GameRenderer_render_t)(unsigned char *game_renderer, float param_1);
 static GameRenderer_render_t GameRenderer_render = (GameRenderer_render_t) 0x4a338;
 
+typedef void (*GameRenderer_setupCamera_t)(unsigned char *game_renderer, float param_1, int param_2);
+static GameRenderer_setupCamera_t GameRenderer_setupCamera = (GameRenderer_setupCamera_t) 0x489f8;
+
 static uint32_t GameRenderer_minecraft_property_offset = 0x4; // Minecraft *
 
 // Mouse
@@ -326,10 +329,12 @@ static uint32_t Entity_x_property_offset = 0x4; // float
 static uint32_t Entity_y_property_offset = 0x8; // float
 static uint32_t Entity_z_property_offset = 0xc; // float
 static uint32_t Entity_yaw_property_offset = 0x40; // float
+static uint32_t Entity_pitch_property_offset = 0x44; // float
 static uint32_t Entity_old_x_property_offset = 0x28; // float
 static uint32_t Entity_old_y_property_offset = 0x2c; // float
 static uint32_t Entity_old_z_property_offset = 0x30; // float
 static uint32_t Entity_old_yaw_property_offset = 0x48; // float
+static uint32_t Entity_old_pitch_property_offset = 0x4c; // float
 
 // Mob