#pragma once // ===== Patternflow pattern ===== // Title: 260712_Midsummer Sea // Author: Seunghun LEE // Date: 2026-07-12 // 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_math.h" #include "../src/core_noise.h" namespace MidsummerSea { const char* NAME = "Midsummer Sea"; const char* const KNOB_LABELS[4] = {"Waves", "Speed", "Sun", "Glitter"}; 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},{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},{1,0,7}, {3,0,17},{5,0,27},{6,0,37},{8,0,47},{10,0,57},{11,0,67},{13,0,77},{15,0,87}, {16,0,97},{18,0,107},{20,0,117},{21,0,127},{23,0,137},{25,0,147},{26,0,157},{28,0,167}, {30,0,177},{32,0,187},{33,0,197},{35,0,207},{37,0,217},{38,0,227},{40,0,237},{42,0,247}, {45,1,253},{53,3,244},{60,5,234},{68,8,225},{76,10,215},{84,12,206},{92,15,196},{100,17,187}, {107,19,177},{115,22,168},{123,24,159},{131,27,149},{139,29,140},{147,31,130},{154,34,121},{162,36,111}, {170,38,102},{178,41,93},{186,43,83},{194,45,74},{202,48,64},{209,50,55},{217,53,45},{225,55,36}, {233,57,27},{241,60,17},{249,62,8},{255,65,2},{255,71,10},{255,78,18},{255,84,27},{255,90,35}, {255,97,44},{255,103,52},{255,109,60},{255,116,69},{255,122,77},{255,128,86},{255,134,94},{255,141,102}, {255,147,111},{255,153,119},{255,160,128},{255,166,136},{255,172,144},{255,178,153},{255,185,161},{255,191,170}, {255,197,178},{255,204,186},{255,210,195},{255,216,203},{255,223,212},{255,229,220},{255,235,228},{255,241,237}, {255,248,245},{255,254,254},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255}, {255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255}, {255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255}, {255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255}, {255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255}, {255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255}, {255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255}, {255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255}, {255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255}, {255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255}, {255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255}, {255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255},{255,255,255}, }; static float waves = 0.374f; static float speed = 1.954f; static float sun = 0.683f; static float glit = 0.311f; static float t = 0.0f; void setup() { PFMath::buildSinLUT(); } void update(float dt, const InputFrame& input) { waves += input.knobDeltas[0] * 0.05f; if (waves < 0.0f) waves = 0.0f; if (waves > 1.0f) waves = 1.0f; speed += input.knobDeltas[1] * 0.1f; if (speed < 0.1f) speed = 0.1f; if (speed > 3.0f) speed = 3.0f; sun += input.knobDeltas[2] * 0.05f; if (sun < 0.0f) sun = 0.0f; if (sun > 1.0f) sun = 1.0f; glit += input.knobDeltas[3] * 0.05f; if (glit < 0.0f) glit = 0.0f; if (glit > 1.0f) glit = 1.0f; t += dt * speed; // common period for all sine multipliers: 2000π if (t > 2000.0f * TWO_PI) { t -= 2000.0f * TWO_PI; } } void draw() { const int W = PANEL_RES_W; // 128 const int H = PANEL_RES_H; // 64 const float vh = (float)(W); // portrait logic: vh = max(W,H) = 128 const float vw = (float)(H); // 64 const float horizon = floorf(vh * 0.34f); // 43 const float beachTop = vh - floorf(vh * 0.14f); // 111 const float sunU = vw * 0.5f; // 32.0 const float sunV = horizon - 3.0f - sun * (horizon - 8.0f); // 40 - sun*35 const float invHorizon = 1.0f / horizon; const float beachRange = vh - beachTop; // 17 for (int y = 0; y < H; ++y) { const float u = (float)y; // 0..63 for (int x = 0; x < W; ++x) { // coordinate remap for vertical panel (landscape physical) const float v = (float)(W - 1 - x); // 127..0 float val; if (v < horizon) { // --- Sky --- const float g = v * invHorizon; val = 0.12f + 0.38f * g; const float du = u - sunU; const float dv = (v - sunV) * 1.2f; const float d = sqrtf(du * du + dv * dv); if (d < 4.5f) { val = 1.0f; } else { val += 0.7f * expf(-d * 0.18f); } const float cl = PFMath::fastSin(u * 0.11f + v * 0.9f + t * 0.25f) + PFMath::fastSin(u * 0.05f - v * 0.5f + 2.0f); if (cl > 1.2f && v < horizon * 0.8f) { val += 0.12f; } } else if (v < beachTop) { // --- Sea --- const float depth = (v - horizon) / (beachTop - horizon); const float persp = 1.0f / (depth + 0.09f); const float wob = PFMath::fastSin(u * 0.25f + t * 1.3f) * 0.5f * waves; const float band = PFMath::fastSin(persp * 2.6f + wob + t * (1.5f + depth * 2.0f)); val = 0.42f - 0.22f * depth + band * (0.06f + 0.14f * waves) * (0.4f + depth); const float pathW = 2.5f + depth * 9.0f; const float sway = PFMath::fastSin(v * 0.5f + t) * waves * 2.0f; const bool inPath = fabsf(u - sunU + sway) < pathW; if (inPath) { val += 0.12f + 0.1f * (1.0f - depth); } // glitter sparkle const int gx = (int)(u * 7.3f); const int gy = (int)(v * 13.1f); const int seed = (int)(floorf(t * 7.0f) * 17.7f); const float sp = PFNoise::cellHash(gx, gy, seed); const float thr = 1.0f - glit * (inPath ? 0.10f : 0.03f); if (sp > thr && band > 0.2f) { val = 1.0f; } } else { // --- Beach --- const float s = (v - beachTop) / beachRange; const int bx = (int)(u * 3.7f); const int by = (int)(v * 5.1f); const float sandHash = PFNoise::cellHash(bx, by); val = 0.5f + 0.15f * s + 0.06f * sandHash; const float surge = PFMath::fastSin(t * 1.8f) * 0.5f + 0.5f; const float edge = beachTop + 2.0f + surge * beachRange * 0.55f * (0.4f + waves) + PFMath::fastSin(u * 0.35f + t * 2.2f) * 2.5f * waves; if (v < edge) { const float waterDepth = (edge - v) / beachRange; val = 0.34f - 0.1f * waterDepth; if (edge - v < 1.5f) { val = 0.95f; } } } // clamp and map through baked ramp val = fmaxf(0.0f, fminf(1.0f, val)); int li = (int)(val * 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 MidsummerSea // ── 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.

Midsummer Sea

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