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libraries/FastLED/examples/FestivalStick/old.h

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+/*
+Festival Stick is a dense corkscrew of LEDs that is wrapped around one end of
+a wooden walking stick commonly found on amazon.A0
+
+The UI screenmap projects this cork screw into polar coordinates, so that the LEDs are
+mapped to a sprial, with the inner portion of the spiral being the top, the outer
+most portion being the bottom.
+
+*/
+
+
+
+#include "fl/assert.h"
+#include "fl/screenmap.h"
+#include "fl/warn.h"
+#include "noise.h"
+#include <FastLED.h>
+// #include "vec3.h"
+
+using namespace fl;
+
+// Power management settings
+#define VOLTS 5
+#define MAX_AMPS 1
+
+
+#define PIN_DATA 9
+#define PIN_CLOCK 7
+
+// Pin could have been tied to ground, instead it's tied to another pin.
+#define PIN_BUTTON 1
+#define PIN_GRND 2
+
+#define NUM_LEDS 288
+// #define CM_BETWEEN_LEDS 1.0 // 1cm between LEDs
+// #define CM_LED_DIAMETER 0.5 // 0.5cm LED diameter
+
+UITitle festivalStickTitle("Festival Stick");
+UIDescription festivalStickDescription(
+    "Take a wooden walking stick, wrap dense LEDs around it like a corkscrew. Super simple but very awesome looking."
+    "This assumes the dense 144 LEDs / meter.");
+
+
+
+UISlider ledsScale("Leds scale", 0.1f, 0.1f, 1.0f, 0.01f);
+UIButton button("Button");
+
+
+CRGB leds[NUM_LEDS];
+
+
+// fl::vector<vec3f>
+struct corkscrew_args {
+    int num_leds = NUM_LEDS;
+    float leds_per_turn = 15.5;
+    float width_cm = 1.0;
+};
+
+fl::vector<vec3f> makeCorkScrew(corkscrew_args args = corkscrew_args()) {
+    // int num_leds, float leds_per_turn, float width_cm
+    int num_leds = args.num_leds;
+    float leds_per_turn = args.leds_per_turn;
+    float width_cm = args.width_cm;
+
+    const float circumference = leds_per_turn;
+    const float radius = circumference / (2.0 * PI);      // radius in mm
+    const float angle_per_led = 2.0 * PI / leds_per_turn; // degrees per LED
+    const float total_angle_radians = angle_per_led * num_leds;
+    const float total_turns = total_angle_radians / (2.0 * PI); // total turns
+    const float height_per_turn_cm = width_cm; // 10cm height per turn
+    const float height_per_led =
+        height_per_turn_cm /
+        leds_per_turn; // this is the changing height per led.
+    const float total_height =
+        height_per_turn_cm * total_turns; // total height of the corkscrew
+    fl::vector<vec3f> out;
+    for (int i = 0; i < num_leds; i++) {
+        float angle = i * angle_per_led; // angle in radians
+        float height = (i / leds_per_turn) * height_per_turn_cm; // height in cm
+
+        // Calculate the x, y, z coordinates for the corkscrew
+        float x = radius * cos(angle); // x coordinate
+        float z = radius * sin(angle); // y coordinate
+        float y = height;              // z coordinate
+
+        // Store the 3D coordinates in the vector
+        vec3f led_position(x, y, z);
+        // screenMap.set(i, led_position);
+        out.push_back(led_position);
+    }
+    return out;
+}
+
+
+fl::ScreenMap makeScreenMap(corkscrew_args args = corkscrew_args()) {
+    // Create a ScreenMap for the corkscrew
+    fl::vector<vec2f> points(args.num_leds);
+
+    int num_leds = args.num_leds;
+    float leds_per_turn = args.leds_per_turn;
+    float width_cm = args.width_cm;
+
+
+    const float circumference = leds_per_turn;
+    const float radius = circumference / (2.0 * PI);      // radius in mm
+    const float angle_per_led = 2.0 * PI / leds_per_turn; // degrees per LED
+    const float height_per_turn_cm = width_cm; // 10cm height per turn
+    const float height_per_led =
+        height_per_turn_cm /
+        leds_per_turn * 1.3; // this is the changing height per led.
+
+
+
+    for (int i = 0; i < num_leds; i++) {
+        float angle = i * angle_per_led; // angle in radians
+        float r = radius + 10 + i * height_per_led; // height in cm
+
+        // Calculate the x, y coordinates for the corkscrew
+        float x = r * cos(angle); // x coordinate
+        float y = r * sin(angle); // y coordinate
+
+        // Store the 2D coordinates in the vector
+        points[i] = vec2f(x, y);
+    }
+
+    FASTLED_WARN("Creating ScreenMap with:\n" << points);
+
+    // Create a ScreenMap from the points
+    fl::ScreenMap screenMap(points.data(), num_leds, .5);
+    return screenMap;
+}
+
+
+// Create a corkscrew with:
+// - 30cm total length (300mm)
+// - 5cm width (50mm)
+// - 2mm LED inner diameter
+// - 24 LEDs per turn
+// fl::ScreenMap screenMap = makeCorkScrew(NUM_LEDS,
+// 300.0f, 50.0f, 2.0f, 24.0f);
+
+corkscrew_args args = corkscrew_args();
+fl::vector<vec3f> mapCorkScrew = makeCorkScrew(args);
+fl::ScreenMap screenMap;
+
+
+CLEDController* addController() {
+    CLEDController* controller = &FastLED.addLeds<APA102HD, PIN_DATA, PIN_CLOCK, BGR>(leds, NUM_LEDS);
+    return controller;
+}
+
+void setup() {
+    pinMode(PIN_GRND, OUTPUT);
+    digitalWrite(PIN_GRND, LOW); // Set ground pin to low
+    button.addRealButton(Button(PIN_BUTTON));
+    screenMap = makeScreenMap(args);
+    //screenMap = ScreenMap::Circle(NUM_LEDS, 1.5f, 0.5f, 1.0f);
+    auto controller = addController();
+    // Set the screen map for the controller
+    controller->setScreenMap(screenMap);
+    
+    // Set power management. This allows this festival stick to conformatable
+    // run on any USB battery that can output at least 1A at 5V.
+    // Keep in mind that this sketch is designed to use APA102HD mode, which will
+    // result in even lowwer run power consumption, since the power mode does not take
+    // into account the APA102HD gamma correction. However it is still a correct upper bound
+    // that will match the ledset exactly when the display tries to go full white.
+    FastLED.setMaxPowerInVoltsAndMilliamps(VOLTS, MAX_AMPS * 1000);
+    button.onChanged([](UIButton& but) {
+        // This function is called when the button is pressed
+        // If the button is pressed, show the generative pattern
+        if (but.isPressed()) {
+            FASTLED_WARN("Button pressed");
+        } else {
+            FASTLED_WARN("NOT Button pressed");
+        }
+    });
+
+}
+
+
+void showGenerative(uint32_t now) {
+    // This function is called to show the generative pattern
+    for (int i = 0; i < NUM_LEDS; i++) {
+        // Get the 2D position of this LED from the screen map
+        fl::vec3f pos = mapCorkScrew[i];
+        float x = pos.x;
+        float y = pos.y;
+        float z = pos.z;
+
+        x*= 20.0f * ledsScale.value();
+        y*= 20.0f * ledsScale.value();
+        z*= 20.0f * ledsScale.value();
+
+        uint16_t noise_value = inoise16(x,y,z, now / 100);
+        // Normalize the noise value to 0-255
+        uint8_t brightness = map(noise_value, 0, 65535, 0, 255);
+        // Create a hue that changes with position and time
+        uint8_t sat = int32_t((x * 10 + y * 5 + now / 5)) % 256;
+        // Set the color
+        leds[i] = CHSV(170, sat, fl::clamp(255- sat, 64, 255));
+    }
+}
+
+void loop() {
+    uint32_t now = millis();
+    fl::clear(leds);
+    showGenerative(now);
+    FastLED.show();
+}