imported from "final" folder

.pio/libdeps/esp01_1m/FastLED/examples/Wave2d/Wave2d.h

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+/// @file    Wave2d.ino
+/// @brief   2D wave effect demonstration
+/// @example Wave2d.ino
+///
+/// This sketch is fully compatible with the FastLED web compiler. To use it do the following:
+/// 1. Install Fastled: `pip install fastled`
+/// 2. cd into this examples page.
+/// 3. Run the FastLED web compiler at root: `fastled`
+/// 4. When the compiler is done a web page will open.
+
+// Author: Stefan Petrick
+
+/*
+This demo is best viewed using the FastLED compiler.
+
+Windows/MacOS binaries: https://github.com/FastLED/FastLED/releases
+
+Python
+
+Install: pip install fastled
+Run: fastled <this sketch directory>
+This will compile and preview the sketch in the browser, and enable
+all the UI elements you see below.
+*/
+
+#include "fl/ui.h"
+#include "fx/2d/wave.h"
+#include <Arduino.h>
+#include <FastLED.h>
+
+using namespace fl;
+
+#define HEIGHT 100
+#define WIDTH 100
+#define NUM_LEDS ((WIDTH) * (HEIGHT))
+#define IS_SERPINTINE true
+
+CRGB leds[NUM_LEDS];
+
+UITitle title("Wave2D Demo");
+UIDescription description("Shows the use of the Wave2d effect. By default the wave is cyclical on the x-axis and waves will spill over to the other side.");
+
+UIButton button("Trigger");
+UICheckbox xCyclical("X Is Cyclical", true);  // The wave keeps on propagating across the x-axis, when true.
+
+UICheckbox autoTrigger("Auto Trigger", true);
+UISlider extraFrames("Extra Frames", 0.0f, 0.0f, 8.0f, 1.0f);
+UISlider slider("Speed", 0.18f, 0.0f, 1.0f);
+UISlider dampening("Dampening", 9.0f, 0.0f, 20.0f, 0.1f);
+UICheckbox halfDuplex("Half Duplex", true);
+UISlider superSample("SuperSampleExponent", 1.f, 0.f, 3.f, 1.f);
+
+// Group related UI elements using UIGroup template multi-argument constructor
+UIGroup waveSimControls("Wave Simulation", slider, dampening, halfDuplex, superSample, xCyclical);
+UIGroup triggerControls("Trigger Controls", button, autoTrigger, extraFrames);
+
+WaveSimulation2D waveSim(WIDTH, HEIGHT, SUPER_SAMPLE_4X);
+
+XYMap xyMap(WIDTH, HEIGHT, IS_SERPINTINE);
+
+
+
+SuperSample getSuperSample() {
+    switch (int(superSample)) {
+    case 0:
+        return SuperSample::SUPER_SAMPLE_NONE;
+    case 1:
+        return SuperSample::SUPER_SAMPLE_2X;
+    case 2:
+        return SuperSample::SUPER_SAMPLE_4X;
+    case 3:
+        return SuperSample::SUPER_SAMPLE_8X;
+    default:
+        return SuperSample::SUPER_SAMPLE_NONE;
+    }
+}
+
+void triggerRipple(WaveSimulation2D &waveSim) {
+    int x = random(WIDTH);
+    int y = random(HEIGHT);
+    waveSim.setf(x, y, 1);
+}
+
+void setup() {
+    Serial.begin(115200);
+    FastLED.addLeds<NEOPIXEL, 2>(leds, NUM_LEDS).setScreenMap(xyMap);
+}
+
+void loop() {
+    // Your code here
+    waveSim.setXCylindrical(xCyclical.value());
+    waveSim.setSpeed(slider);
+    waveSim.setDampening(dampening);
+    waveSim.setHalfDuplex(halfDuplex);
+    waveSim.setSuperSample(getSuperSample());
+    if (button) {
+        triggerRipple(waveSim);
+    }
+
+
+    EVERY_N_MILLISECONDS(400) {
+        if (autoTrigger) {
+            triggerRipple(waveSim);
+        }
+    }
+
+    waveSim.update();
+    for (int y = 0; y < HEIGHT; y++) {
+        for (int x = 0; x < WIDTH; x++) {
+            uint8_t value8 = waveSim.getu8(x, y);
+            uint32_t idx = xyMap.mapToIndex(x, y);
+            leds[idx] = CRGB(value8, value8, value8);
+        }
+    }
+    FastLED.show();
+}