From d186ead9ff7d202685960f42b40344ad9c272a9c Mon Sep 17 00:00:00 2001
From: Forairaaaaa <applesyqd@outlook.com>
Date: Sat, 30 Mar 2024 00:53:11 +0800
Subject: [PATCH] add simple water wave generator

---
 .../water_wave_generator.cpp                  | 58 +++++++++++++++++++
 .../water_wave_generator.h                    | 48 +++++++++++++++
 src/smooth_ui_toolkit.h                       |  2 +
 3 files changed, 108 insertions(+)
 create mode 100644 src/misc/water_wave_generator/water_wave_generator.cpp
 create mode 100644 src/misc/water_wave_generator/water_wave_generator.h

diff --git a/src/misc/water_wave_generator/water_wave_generator.cpp b/src/misc/water_wave_generator/water_wave_generator.cpp
new file mode 100644
index 0000000..7a56cfa
--- /dev/null
+++ b/src/misc/water_wave_generator/water_wave_generator.cpp
@@ -0,0 +1,58 @@
+/**
+ * @file water_wave_generator.cpp
+ * @author Forairaaaaa
+ * @brief
+ * @version 0.1
+ * @date 2024-03-30
+ *
+ * @copyright Copyright (c) 2024
+ *
+ */
+#include "water_wave_generator.h"
+#include "../../utils/fpm/fixed.hpp"
+#include "../../utils/fpm/math.hpp"
+
+using namespace SmoothUIToolKit::Misc;
+
+void WaterWaveGenerator::init(size_t waveLenght)
+{
+    if (waveLenght == 0)
+        return;
+
+    // Resize
+    _data.wave_a_buffer.reSize(waveLenght);
+    _data.wave_b_buffer.reSize(waveLenght);
+
+    // Fill it up
+    for (int i = 0; i < waveLenght; i++)
+    {
+        _data.wave_a_buffer.put(_wave_a_formula(i));
+        _data.wave_b_buffer.put(_wave_b_formula(i));
+    }
+    _data.wave_x = waveLenght;
+}
+
+void WaterWaveGenerator::update()
+{
+    // Put wave b twice to make it faster
+    _data.wave_a_buffer.put(_wave_a_formula(_data.wave_x));
+    _data.wave_b_buffer.put(_wave_b_formula(_data.wave_x));
+    _data.wave_b_buffer.put(_wave_b_formula(_data.wave_x));
+    _data.wave_x++;
+}
+
+// Just simple sine
+// https://www.desmos.com/calculator/dvzez1v6gr
+int WaterWaveGenerator::_wave_a_formula(const int& x)
+{
+    fpm::fixed_16_16 fx{x};
+    fx = fpm::sin(fx / 60) * 10;
+    return static_cast<int>(fx);
+}
+
+int WaterWaveGenerator::_wave_b_formula(const int& x)
+{
+    fpm::fixed_16_16 fx{x - 20};
+    fx = fpm::sin(fx / 60) * 13 - 10;
+    return static_cast<int>(fx);
+}
diff --git a/src/misc/water_wave_generator/water_wave_generator.h b/src/misc/water_wave_generator/water_wave_generator.h
new file mode 100644
index 0000000..7aa406a
--- /dev/null
+++ b/src/misc/water_wave_generator/water_wave_generator.h
@@ -0,0 +1,48 @@
+/**
+ * @file water_wave_generator.h
+ * @author Forairaaaaa
+ * @brief
+ * @version 0.1
+ * @date 2024-03-30
+ *
+ * @copyright Copyright (c) 2024
+ *
+ */
+#pragma once
+#include "../../core/types/types.h"
+#include "../../utils/ring_buffer/ring_buffer.h"
+#include <cstddef>
+#include <cstdint>
+
+namespace SmoothUIToolKit
+{
+    namespace Misc
+    {
+        /**
+         * @brief  Provide two dynamic sine curves, to simulate waving water surface.
+         *
+         */
+        class WaterWaveGenerator
+        {
+        private:
+            struct Data_t
+            {
+                RingBuffer<int, 1> wave_a_buffer;
+                RingBuffer<int, 1> wave_b_buffer;
+                uint16_t wave_x = 0;
+            };
+            Data_t _data;
+
+        protected:
+            virtual int _wave_a_formula(const int& x);
+            virtual int _wave_b_formula(const int& x);
+
+        public:
+            void init(size_t waveLenght);
+            virtual void update();
+            inline RingBuffer<int, 1>& getWaveA() { return _data.wave_a_buffer; }
+            inline RingBuffer<int, 1>& getWaveB() { return _data.wave_b_buffer; }
+        };
+
+    } // namespace Misc
+} // namespace SmoothUIToolKit
diff --git a/src/smooth_ui_toolkit.h b/src/smooth_ui_toolkit.h
index 2b5c5c8..50f0eb2 100644
--- a/src/smooth_ui_toolkit.h
+++ b/src/smooth_ui_toolkit.h
@@ -26,3 +26,5 @@
 #include "utils/ring_buffer/ring_buffer.h"
 
 #include "widgets/base/base.h"
+
+#include "misc/water_wave_generator/water_wave_generator.h"