#pragma once // ===== Patternflow pattern ===== // Title: 260719_MagVortex // Author: Seunghun LEE // Date: 2026-07-19 // SPDX-License-Identifier: CC-BY-SA-4.0 // =============================== #include #include "config.h" #include "../src/core_display.h" #include "../src/core_encoders.h" #include "../src/core_canvas.h" #include "../src/core_mem.h" namespace MagVortex { const char* NAME = "MagVortex"; const char* const KNOB_LABELS[4] = { "TrailDecay", "Velocity", "SpinPull", "InflowPitch" }; // Parameter state static float trailDecay = 0.924f; static float velocity = 2.013f; static float spin = 0.746f; static float pitch = -2.203f; // Density map (0..1 trails). 128×64 floats (32 KB) — as a static array this // sat in internal DRAM from boot for every build; allocated from PSRAM in // setup() instead (PFMem). static float* densityMap = nullptr; // Particle structure struct Charge { float r; float angle; float speedProfile; float brightness; float prevX; float prevY; }; static const int NUM_CHARGES = 48; static Charge charges[NUM_CHARGES]; // Helper for random float 0..1 static float randf() { return (float)random(0x7FFFFFFF) / (float)0x7FFFFFFF; } // Pre-baked color ramp LUT (verbatim) static const uint8_t RAMP_LUT[256][3] = { {0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0}, {0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0}, {0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0}, {0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0}, {0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0}, {0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0}, {0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0}, {0,0,0},{43,39,47},{80,61,100},{107,61,153},{123,40,205},{128,0,255},{132,0,255},{136,0,255}, {141,0,255},{145,0,255},{149,0,255},{153,0,255},{157,0,255},{161,0,255},{165,0,255},{169,0,255}, {174,0,255},{178,0,255},{182,0,255},{186,0,255},{190,0,255},{194,0,255},{198,0,255},{202,0,255}, {206,0,255},{211,0,255},{215,0,255},{219,0,255},{223,0,255},{228,0,255},{232,0,255},{236,0,255}, {240,0,255},{245,0,255},{249,0,255},{253,0,255},{255,0,253},{255,0,248},{255,0,244},{255,0,240}, {255,0,236},{255,0,231},{255,0,227},{255,0,223},{255,0,219},{255,0,214},{255,0,210},{255,0,206}, {255,0,202},{255,0,197},{255,0,193},{255,0,189},{255,0,185},{255,0,180},{255,0,176},{255,0,172}, {255,0,168},{255,0,163},{255,0,159},{255,0,155},{255,0,151},{255,0,146},{255,0,142},{255,0,138}, {255,0,134},{255,0,129},{255,0,125},{255,0,121},{255,0,117},{255,0,112},{255,0,108},{255,0,104}, {255,0,100},{255,0,95},{255,0,91},{255,0,87},{255,0,83},{255,0,78},{255,0,74},{255,0,70}, {255,0,66},{255,0,61},{255,0,57},{255,0,53},{255,0,49},{255,0,44},{255,0,40},{255,0,36}, {255,0,32},{255,0,27},{255,0,23},{255,0,19},{255,0,15},{255,0,10},{255,0,6},{255,0,2}, {255,13,13},{255,38,38},{255,63,63},{255,88,88},{255,113,113},{255,138,138},{255,163,163},{255,188,188}, {255,213,213},{255,238,238},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255}, {255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255}, {255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255}, {255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255}, {255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255}, {255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255}, {255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255}, {255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255}, {255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255}, {255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255}, {255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255}, {255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255}, }; void setup() { // Seed randomness randomSeed(esp_random()); // Density map lives in PSRAM; PFMem zeroes fresh allocations. if (!densityMap) { densityMap = PFMem::allocFloats(PANEL_RES_W * PANEL_RES_H); } else { for (int i = 0; i < PANEL_RES_W * PANEL_RES_H; i++) { densityMap[i] = 0.0f; } } // Initialize particles const float cx = PANEL_RES_W / 2.0f; const float cy = PANEL_RES_H / 2.0f; for (int i = 0; i < NUM_CHARGES; i++) { float r = 10.0f + randf() * 60.0f; float angle = randf() * TWO_PI; float xPos = cx + cosf(angle) * r; float yPos = cy + sinf(angle) * r; charges[i].r = r; charges[i].angle = angle; charges[i].speedProfile = 0.8f + randf() * 1.4f; charges[i].brightness = 0.4f + randf() * 0.6f; charges[i].prevX = xPos; charges[i].prevY = yPos; } } void update(float dt, const InputFrame& input) { if (!densityMap) return; // allocation failed — degrade to a blank pattern // Knob 0: TrailDecay trailDecay += input.knobDeltas[0] * 0.05f; if (trailDecay < 0.5f) trailDecay = 0.5f; if (trailDecay > 0.98f) trailDecay = 0.98f; // Knob 1: Velocity velocity += input.knobDeltas[1] * 0.1f; if (velocity < -3.0f) velocity = -3.0f; if (velocity > 5.0f) velocity = 5.0f; // Knob 2: SpinPull spin += input.knobDeltas[2] * 0.05f; if (spin < 0.0f) spin = 0.0f; if (spin > 3.0f) spin = 3.0f; // Knob 3: InflowPitch pitch += input.knobDeltas[3] * 0.05f; if (pitch < -20.0f) pitch = -20.0f; if (pitch > 20.0f) pitch = 20.0f; // Button resets if (input.btnPressed[0]) trailDecay = 0.924f; if (input.btnPressed[1]) velocity = 2.013f; if (input.btnPressed[2]) spin = 0.746f; if (input.btnPressed[3]) pitch = -2.203f; // Decay the density map for (int i = 0; i < PANEL_RES_W * PANEL_RES_H; i++) { densityMap[i] *= trailDecay; } float tStep = velocity * dt * 4.0f; const float cx = PANEL_RES_W / 2.0f; const float cy = PANEL_RES_H / 2.0f; for (int i = 0; i < NUM_CHARGES; i++) { Charge& c = charges[i]; // Save previous position c.prevX = cx + cosf(c.angle) * c.r; c.prevY = cy + sinf(c.angle) * c.r; // Update orbit c.angle += spin * 0.4f * c.speedProfile * tStep; c.r -= pitch * 6.0f * tStep; // Reset logic depending on flow direction if (pitch > 0.01f) { // Inward flow if (c.r < 3.0f) { c.r = 55.0f + randf() * 35.0f; c.angle = randf() * TWO_PI; c.prevX = cx + cosf(c.angle) * c.r; c.prevY = cy + sinf(c.angle) * c.r; } } else if (pitch < -0.01f) { // Outward flow if (c.r > 90.0f) { c.r = 2.0f + randf() * 5.0f; c.angle = randf() * TWO_PI; c.prevX = cx + cosf(c.angle) * c.r; c.prevY = cy + sinf(c.angle) * c.r; } } else { // Neutral if (c.r < 3.0f || c.r > 90.0f) { c.r = 30.0f + randf() * 40.0f; c.angle = randf() * TWO_PI; c.prevX = cx + cosf(c.angle) * c.r; c.prevY = cy + sinf(c.angle) * c.r; } } // Current position float curX = cx + cosf(c.angle) * c.r; float curY = cy + sinf(c.angle) * c.r; // Interpolate trail between previous and current float dx = curX - c.prevX; float dy = curY - c.prevY; float dist = sqrtf(dx * dx + dy * dy); int steps = (int)ceilf(dist); if (steps < 1) steps = 1; float addVal = c.brightness * 0.7f; for (int s = 0; s <= steps; s++) { float frac = (float)s / (float)steps; float px = c.prevX + dx * frac; float py = c.prevY + dy * frac; int ix = (int)floorf(px); int iy = (int)floorf(py); if (ix >= 0 && ix < PANEL_RES_W && iy >= 0 && iy < PANEL_RES_H) { int idx = iy * PANEL_RES_W + ix; float newVal = densityMap[idx] + addVal; if (newVal > 1.0f) newVal = 1.0f; densityMap[idx] = newVal; } } } } void draw() { if (!densityMap) { // allocation failed — show nothing rather than crash PFCanvas::present(); return; } for (int y = 0; y < PANEL_RES_H; y++) { for (int x = 0; x < PANEL_RES_W; x++) { int idx = y * PANEL_RES_W + x; float val = densityMap[idx]; float v; if (val > 0.001f) { if (val < 0.15f) { v = 0.06f + val * 0.6f; } else if (val < 0.45f) { v = 0.2f + (val - 0.15f) * 1.3f; } else if (val < 0.75f) { v = 0.55f + (val - 0.45f) * 1.5f; } else { v = 0.85f + (val - 0.75f) * 2.0f; } if (v > 1.0f) v = 1.0f; if (v < 0.0f) v = 0.0f; } else { v = 0.02f; } int li = (int)(v * 255.0f + 0.5f); if (li < 0) li = 0; if (li > 255) li = 255; PFCanvas::setPixel(x, y, RAMP_LUT[li][0], RAMP_LUT[li][1], RAMP_LUT[li][2]); } } PFCanvas::present(); } } // namespace MagVortex // ── Made with Patternflow Pattern Lab · https://patternflow.work/pattern-lab ── // Shared under CC-BY-SA-4.0. Attribution is part of this licence — // please keep this notice and the author credit above when you reuse, // remix, or redistribute this pattern. Do not delete it.

MagVortex

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