Snapturn: Add snapturn feature and related gui settings

src/mods/VR.cpp

@@ -886,6 +886,54 @@ void VR::on_xinput_get_state(uint32_t* retval, uint32_t user_index, XINPUT_STATE
             }
         }
     }
+
+    // Determine if snapturn should be run on frame
+    if (m_snapturn->value()) {
+        DPadMethod dpad_method = get_dpad_method();
+        const auto snapturn_deadzone = get_snapturn_js_deadzone();
+        float stick_axis{};
+
+        if (!m_was_snapturn_run_on_input) {
+            if (dpad_method == RIGHT_JOYSTICK) {
+                stick_axis = get_left_stick_axis().x;
+                if (abs(stick_axis) >= snapturn_deadzone) {
+                    if (stick_axis < 0) {
+                        m_snapturn_left = true;
+                    }
+                    m_snapturn_on_frame = true;
+                    m_was_snapturn_run_on_input = true;
+                }
+            }
+            else {
+                stick_axis = get_right_stick_axis().x;
+                if (abs(stick_axis) >= snapturn_deadzone && !(dpad_method == DPadMethod::LEFT_TOUCH && is_action_active_any_joystick(m_action_thumbrest_touch_left))) {
+                    if (stick_axis < 0) {
+                        m_snapturn_left = true;
+                    }
+                    m_snapturn_on_frame = true;
+                    m_was_snapturn_run_on_input = true;
+                }
+            }
+        }
+        else {
+            if (dpad_method == RIGHT_JOYSTICK) {
+                if (abs(get_left_stick_axis().x) < snapturn_deadzone) {
+                    m_was_snapturn_run_on_input = false;
+                } else {
+                    state->Gamepad.sThumbLY = 0;
+                    state->Gamepad.sThumbLX = 0;
+                }
+            }
+            else {
+                if (abs(get_right_stick_axis().x) < snapturn_deadzone) {
+                    m_was_snapturn_run_on_input = false;
+                } else {
+                    state->Gamepad.sThumbRY = 0;
+                    state->Gamepad.sThumbRX = 0;
+                }
+            }
+        }
+    }
 
     // Do it again after all the VR buttons have been spoofed
     update_imgui_state_from_xinput_state(*state, true);
@@ -2060,6 +2108,17 @@ void VR::on_draw_sidebar_entry(std::string_view name) {
             ImGui::TreePop();
         }
 
+        ImGui::SetNextItemOpen(true, ImGuiCond_::ImGuiCond_Once);
+        if (ImGui::TreeNode("Snap Turn")) {
+            m_snapturn->draw("Enabled");
+            ImGui::TextWrapped("Set Snap Turn Rotation Angle in Degrees.");
+            m_snapturn_angle->draw("Angle");
+            ImGui::TextWrapped("Set Snap Turn Joystick Deadzone.");
+            m_snapturn_joystick_deadzone->draw("Deadzone");
+
+            ImGui::TreePop();
+        }
+
         ImGui::SetNextItemOpen(true, ImGuiCond_::ImGuiCond_Once);
         if (ImGui::TreeNode("Movement Orientation")) {
             m_movement_orientation->draw("Type");

src/mods/VR.hpp

@@ -497,6 +497,18 @@ class VR : public Mod {
         return (DPadMethod)m_dpad_shifting_method->value();
     }
 
+    bool is_snapturn_enabled() const {
+        return m_snapturn->value();
+    }
+
+    float get_snapturn_js_deadzone() const {
+        return m_snapturn_joystick_deadzone->value();
+    }
+
+    int get_snapturn_angle() const {
+        return m_snapturn_angle->value();
+    }
+
     bool should_skip_post_init_properties() const {
         return m_compatibility_skip_pip->value();
     }
@@ -731,6 +743,14 @@ class VR : public Mod {
     const ModToggle::Ptr m_roomscale_movement{ ModToggle::create(generate_name("RoomscaleMovement"), false) };
     const ModToggle::Ptr m_roomscale_movement_actor_rotation{ ModToggle::create(generate_name("RoomscaleMovementActorRotation"), false) };
 
+    // Snap turn settings and globals
+    const ModToggle::Ptr m_snapturn{ ModToggle::create(generate_name("SnapTurn"), false) };
+    const ModSlider::Ptr m_snapturn_joystick_deadzone{ ModSlider::create(generate_name("SnapturnJoystickDeadzone"), 0.01f, 0.99f, 0.2f) };
+    const ModInt32::Ptr m_snapturn_angle{ ModSliderInt32::create(generate_name("SnapturnTurnAngle"), 1, 359, 45) };
+    static inline bool m_snapturn_on_frame{false};
+    static inline bool m_snapturn_left{false};
+    static inline bool m_was_snapturn_run_on_input{false};
+
     // Aim method and movement orientation are not the same thing, but they can both have the same options
     const ModCombo::Ptr m_aim_method{ ModCombo::create(generate_name("AimMethod"), s_aim_method_names, AimMethod::GAME) };
     const ModCombo::Ptr m_movement_orientation{ ModCombo::create(generate_name("MovementOrientation"), s_aim_method_names, AimMethod::GAME) };
@@ -803,6 +823,9 @@ class VR : public Mod {
         *m_2d_screen_mode,
         *m_roomscale_movement,
         *m_roomscale_movement_actor_rotation,
+        *m_snapturn,
+        *m_snapturn_joystick_deadzone,
+        *m_snapturn_angle,
         *m_aim_method,
         *m_movement_orientation,
         *m_aim_speed,

src/mods/vr/FFakeStereoRenderingHook.cpp

@@ -4134,6 +4134,23 @@ __forceinline void FFakeStereoRenderingHook::calculate_stereo_view_offset(
                 }
             }
         }
+
+        // Process snapturn    
+        if (vr->m_snapturn_on_frame) {
+            const auto world = sdk::UEngine::get()->get_world();
+            if (const auto controller = sdk::UGameplayStatics::get()->get_player_controller(world, 0); controller != nullptr) {
+                auto controller_rot = controller->get_control_rotation();
+                auto turn_degrees = vr->get_snapturn_angle();
+
+                if (vr->m_snapturn_left) {
+                    turn_degrees = -turn_degrees;
+                    vr->m_snapturn_left = false;
+                }
+                controller_rot.y += turn_degrees;
+                controller->set_control_rotation(controller_rot);
+            }
+            vr->m_snapturn_on_frame = false;
+        }
     }
 
     if (!is_full_pass) {