feat: new shake to find behaviour

src/other/Shake.cpp

@@ -1,13 +1,49 @@
 #include "../globals.hpp"
 #include "../config/config.hpp"
+#include "src/config/ConfigManager.hpp"
+#include "src/helpers/AnimatedVariable.hpp"
+#include "src/managers/AnimationManager.hpp"
 #include "src/managers/EventManager.hpp"
 #include "Shake.hpp"
+#include <algorithm>
+#include <chrono>
 #include <hyprland/src/Compositor.hpp>
 #include <hyprland/src/debug/Log.hpp>
 
+CShake::CShake() {
+    // the timing and the bezier are quite crucial, as things will break down if they are just changed slighly
+    // this is not ideal and should be fixed some time in the future, then it may be made configurable (if it has a substatntial enough effect on behaviour)
+
+    int time = 400;
+
+    // add custom bezier (and readd it after config reload)
+    static auto bezier = "dynamic-cursors-magnification";
+    g_pAnimationManager->addBezierWithName(bezier, {0.22, 1.0}, {0.36, 1.0});
+    static const auto PCALLBACK = HyprlandAPI::registerCallbackDynamic( PHANDLE, "configReloaded", [&](void* self, SCallbackInfo&, std::any data) {
+        g_pAnimationManager->addBezierWithName(bezier, {0.22, 1.0}, {0.36, 1.0});
+    });
+
+    // wtf is this struct?
+    static SAnimationPropertyConfig properties = {false, bezier, "", time / 100.F, 1, nullptr, nullptr };
+    properties.pValues = &properties;
+
+    zoom.create(&properties, AVARDAMAGE_NONE);
+    zoom.registerVar();
+    zoom.setValueAndWarp(1);
+}
+
+CShake::~CShake() {
+    zoom.unregister();
+}
+
 double CShake::update(Vector2D pos) {
     static auto* const* PTHRESHOLD = (Hyprlang::FLOAT* const*) getConfig(CONFIG_SHAKE_THRESHOLD);
-    static auto* const* PFACTOR = (Hyprlang::FLOAT* const*) getConfig(CONFIG_SHAKE_FACTOR);
+    static auto* const* PBASE = (Hyprlang::FLOAT* const*) getConfig(CONFIG_SHAKE_BASE);
+    static auto* const* PSPEED = (Hyprlang::FLOAT* const*) getConfig(CONFIG_SHAKE_SPEED);
+    static auto* const* PINFLUENCE = (Hyprlang::FLOAT* const*) getConfig(CONFIG_SHAKE_INFLUENCE);
+    static auto* const* PLIMIT = (Hyprlang::FLOAT* const*) getConfig(CONFIG_SHAKE_LIMIT);
+    static auto* const* PTIMEOUT = (Hyprlang::INT* const*) getConfig(CONFIG_SHAKE_TIMEOUT);
+
     static auto* const* PIPC = (Hyprlang::INT* const*) getConfig(CONFIG_SHAKE_IPC);
 
     int max = g_pHyprRenderer->m_pMostHzMonitor->refreshRate; // 1s worth of history
@@ -36,19 +72,35 @@ double CShake::update(Vector2D pos) {
     }
     double diagonal = Vector2D{left, top}.distance(Vector2D(right, bottom));
 
-    // discard when the diagonal is small, return so we don't have issues with inaccuracies
-    if (diagonal < 100) return 1.0;
+    // if diagonal sufficiently large and over threshold
+    double amount = (trail / diagonal) - **PTHRESHOLD;
+    if (diagonal > 100 && amount > 0) {
+        float delta = 1.F / g_pHyprRenderer->m_pMostHzMonitor->refreshRate;
 
-    double zoom = ((trail / diagonal) - **PTHRESHOLD);
+        float next = this->zoom.goal();
+
+        if (!started) next = **PBASE; // start on base zoom
+        next += delta * (**PSPEED + (amount * amount) * **PINFLUENCE); // increase when moving
+        if (**PLIMIT > 1) next = std::min(**PLIMIT, next); // limit overall zoom
+
+        if (next != this->zoom.goal()) this->zoom = next;
+        this->end = steady_clock::now() + milliseconds(**PTIMEOUT);
+        started = true;
+    } else {
+        if (started && end < std::chrono::steady_clock::now()) {
+            this->zoom = 1;
+            started = false;
+        }
+    }
 
     if (**PIPC) {
-        if (zoom > 1) {
+        if (started || this->zoom.value() > 1) {
             if (!ipc) {
                 g_pEventManager->postEvent(SHyprIPCEvent { IPC_SHAKE_START });
                 ipc = true;
             }
 
-            g_pEventManager->postEvent(SHyprIPCEvent { IPC_SHAKE_UPDATE, std::format("{},{},{},{}", (int) pos.x, (int) pos.y, trail, diagonal) });
+            g_pEventManager->postEvent(SHyprIPCEvent { IPC_SHAKE_UPDATE, std::format("{},{},{},{},{}", (int) pos.x, (int) pos.y, trail, diagonal, this->zoom.value()) });
         } else {
             if (ipc) {
                 g_pEventManager->postEvent(SHyprIPCEvent { IPC_SHAKE_END });
@@ -57,14 +109,5 @@ double CShake::update(Vector2D pos) {
         }
     }
 
-    // fix jitter by allowing the diagonal to only grow, until we are below the threshold again
-    if (zoom > 0) { // larger than 0 because of factor
-        if (diagonal > this->diagonal)
-            this->diagonal = diagonal;
-
-        zoom = ((trail / this->diagonal) - **PTHRESHOLD);
-    } else this->diagonal = 0;
-
-    // we want ipc to work with factor = 0, so we use it here
-    return std::max(1.0, zoom * **PFACTOR);
+    return this->zoom.value();
 }

src/other/Shake.hpp

@@ -1,3 +1,4 @@
+#include "src/helpers/AnimatedVariable.hpp"
 #include <hyprutils/math/Vector2D.hpp>
 #include <vector>
 
@@ -6,9 +7,13 @@
 #define IPC_SHAKE_END "shakeend"
 
 using namespace Hyprutils::Math;
+using namespace std::chrono;
 
 class CShake {
   public:
+    CShake();
+    ~CShake();
+
     /* calculates the new zoom factor for the current pos */
     double update(Vector2D pos);
 
@@ -16,8 +21,9 @@ class CShake {
     /* tracks whether the current shake has already been announced in the ipc */
     bool ipc = false;
 
-    /* stores last measured diagonal */
-    float diagonal = 0;
+    bool started = false;
+    CAnimatedVariable<float> zoom;
+    steady_clock::time_point end;
 
     /* ringbuffer for last samples */
     std::vector<Vector2D> samples;