Wave2d.h

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// 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/ui.h"
#include "fl/fx/2d/wave.h"
#include <Arduino.h>
#include <FastLED.h>
 
 
#define HEIGHT 100
#define WIDTH 100
#define NUM_LEDS ((WIDTH) * (HEIGHT))
#define IS_SERPINTINE true
 
fl::CRGB leds[NUM_LEDS];
 
fl::UITitle title("Wave2D Demo");
fl::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.");
 
fl::UIButton button("Trigger");
fl::UICheckbox xCyclical("X Is Cyclical", true);  // The wave keeps on propagating across the x-axis, when true.
 
fl::UICheckbox autoTrigger("Auto Trigger", true);
fl::UISlider extraFrames("Extra Frames", 0.0f, 0.0f, 8.0f, 1.0f);
fl::UISlider slider("Speed", 0.18f, 0.0f, 1.0f);
fl::UISlider dampening("Dampening", 9.0f, 0.0f, 20.0f, 0.1f);
fl::UICheckbox halfDuplex("Half Duplex", true);
fl::UISlider superSample("SuperSampleExponent", 1.f, 0.f, 3.f, 1.f);
fl::UICheckbox isotropicStencil("Isotropic stencil (rounder ripples)", false);
 
// Group related UI elements using fl::UIGroup template multi-argument constructor
fl::UIGroup waveSimControls("Wave Simulation", slider, dampening, halfDuplex, superSample, isotropicStencil, xCyclical);
fl::UIGroup triggerControls("Trigger Controls", button, autoTrigger, extraFrames);
 
fl::WaveSimulation2D waveSim(WIDTH, HEIGHT, fl::SuperSample::SUPER_SAMPLE_4X);
 
fl::XYMap xyMap(WIDTH, HEIGHT, IS_SERPINTINE);
 
 
 
fl::SuperSample getSuperSample() {
    switch (int(superSample)) {
    case 0:
        return fl::SuperSample::SUPER_SAMPLE_NONE;
    case 1:
        return fl::SuperSample::SUPER_SAMPLE_2X;
    case 2:
        return fl::SuperSample::SUPER_SAMPLE_4X;
    case 3:
        return fl::SuperSample::SUPER_SAMPLE_8X;
    default:
        return fl::SuperSample::SUPER_SAMPLE_NONE;
    }
}
 
void triggerRipple(fl::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());
    // Apply after setSuperSample() so the user's choice survives the
    // wrapper's multiplier-based auto-select for the stencil.
    waveSim.setStencil(isotropicStencil
                           ? fl::LaplacianStencil::NinePointIsotropic
                           : fl::LaplacianStencil::FivePoint);
    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] = fl::CRGB(value8, value8, value8);
        }
    }
    FastLED.show();
}