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235 lines
7.2 KiB
235 lines
7.2 KiB
/* -*- mode: c++ -*-
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* Kaleidoscope-LED-Wavepool
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* Copyright (C) 2017 Selene Scriven
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifdef ARDUINO_AVR_MODEL01
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#include <Kaleidoscope-LED-Wavepool.h>
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#include "kaleidoscope/keyswitch_state.h"
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namespace kaleidoscope {
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namespace plugin {
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#define INTERPOLATE 1 // smoother, slower animation
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#define MS_PER_FRAME 40 // 40 = 25 fps
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#define FRAMES_PER_DROP 120 // max time between raindrops during idle animation
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uint16_t WavepoolEffect::idle_timeout = 5000; // 5 seconds
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int16_t WavepoolEffect::ripple_hue = WavepoolEffect::rainbow_hue; // automatic hue
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// map native keyboard coordinates (16x4) into geometric space (14x5)
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PROGMEM const uint8_t WavepoolEffect::TransientLEDMode::rc2pos[Runtime.device().numKeys()] = {
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0, 1, 2, 3, 4, 5, 6, 59, 66, 7, 8, 9, 10, 11, 12, 13,
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14, 15, 16, 17, 18, 19, 34, 60, 65, 35, 22, 23, 24, 25, 26, 27,
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28, 29, 30, 31, 32, 33, 48, 61, 64, 49, 36, 37, 38, 39, 40, 41,
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42, 43, 44, 45, 46, 47, 58, 62, 63, 67, 50, 51, 52, 53, 54, 55,
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};
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WavepoolEffect::TransientLEDMode::TransientLEDMode(const WavepoolEffect *parent)
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: frames_since_event_(0),
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surface_{},
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page_(0)
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{}
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EventHandlerResult WavepoolEffect::onKeyEvent(KeyEvent &event) {
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if (!event.addr.isValid())
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return EventHandlerResult::OK;
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if (::LEDControl.get_mode_index() != led_mode_id_)
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return EventHandlerResult::OK;
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return ::LEDControl.get_mode<TransientLEDMode>()->onKeyEvent(event);
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}
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EventHandlerResult WavepoolEffect::TransientLEDMode::onKeyEvent(KeyEvent &event) {
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// It might be better to trigger on both toggle-on and toggle-off, but maybe
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// just the former.
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if (keyIsPressed(event.state)) {
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surface_[page_][pgm_read_byte(rc2pos + event.addr.toInt())] = 0x7f;
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frames_since_event_ = 0;
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}
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return EventHandlerResult::OK;
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}
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void WavepoolEffect::TransientLEDMode::raindrop(uint8_t x, uint8_t y, int8_t *page_) {
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uint8_t rainspot = (y * WP_WID) + x;
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page_[rainspot] = 0x7f;
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if (y > 0) page_[rainspot - WP_WID] = 0x60;
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if (y < (WP_HGT - 1)) page_[rainspot + WP_WID] = 0x60;
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if (x > 0) page_[rainspot - 1] = 0x60;
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if (x < (WP_WID - 1)) page_[rainspot + 1] = 0x60;
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}
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// this is a lot smaller than the standard library's rand(),
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// and still looks random-ish
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uint8_t WavepoolEffect::TransientLEDMode::wp_rand() {
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static intptr_t offset = 0x400;
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offset = ((offset + 1) & 0x4fff) | 0x400;
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return (Runtime.millisAtCycleStart() / MS_PER_FRAME) + pgm_read_byte((const uint8_t *)offset);
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}
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void WavepoolEffect::TransientLEDMode::update(void) {
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// limit the frame rate; one frame every 64 ms
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static uint8_t prev_time = 0;
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uint8_t now = Runtime.millisAtCycleStart() / MS_PER_FRAME;
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if (now != prev_time) {
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prev_time = now;
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} else {
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return;
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}
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// rotate the colors over time
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// (side note: it's weird that this is a 16-bit int instead of 8-bit,
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// but that's what the library function wants)
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static uint8_t current_hue = 0;
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current_hue ++;
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frames_since_event_ ++;
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// needs two pages of height map to do the calculations
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int8_t *newpg = &surface_[page_ ^ 1][0];
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int8_t *oldpg = &surface_[page_][0];
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// rain a bit while idle
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static uint8_t frames_till_next_drop = 0;
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static int8_t prev_x = -1;
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static int8_t prev_y = -1;
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#ifdef INTERPOLATE
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// even frames: water movement and page flipping
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// odd frames: raindrops and tweening
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// (this arrangement seems to look best overall)
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if (((now & 1)) && (idle_timeout > 0)) {
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#else
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if (idle_timeout > 0) {
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#endif
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// repeat previous raindrop to give it a slightly better effect
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if (prev_x >= 0) {
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raindrop(prev_x, prev_y, oldpg);
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prev_x = prev_y = -1;
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}
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if (frames_since_event_
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>= (frames_till_next_drop
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+ (idle_timeout / MS_PER_FRAME))) {
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frames_till_next_drop = 4 + (wp_rand() % FRAMES_PER_DROP);
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frames_since_event_ = idle_timeout / MS_PER_FRAME;
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uint8_t x = wp_rand() % WP_WID;
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uint8_t y = wp_rand() % WP_HGT;
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raindrop(x, y, oldpg);
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prev_x = x;
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prev_y = y;
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}
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}
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// calculate water movement
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// (originally skipped edges, but this keyboard is too small for that)
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//for (uint8_t y = 1; y < WP_HGT-1; y++) {
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// for (uint8_t x = 1; x < WP_WID-1; x++) {
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#ifdef INTERPOLATE
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if (!(now & 1)) { // even frames only
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#endif
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for (uint8_t y = 0; y < WP_HGT; y++) {
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for (uint8_t x = 0; x < WP_WID; x++) {
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uint8_t offset = (y * WP_WID) + x;
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int16_t value;
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int8_t offsets[] = { -WP_WID, WP_WID,
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-1, 1,
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-WP_WID - 1, -WP_WID + 1,
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WP_WID - 1, WP_WID + 1
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};
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// don't wrap around edges or go out of bounds
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if (y == 0) {
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offsets[0] = 0;
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offsets[4] += WP_WID;
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offsets[5] += WP_WID;
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} else if (y == WP_HGT - 1) {
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offsets[1] = 0;
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offsets[6] -= WP_WID;
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offsets[7] -= WP_WID;
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}
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if (x == 0) {
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offsets[2] = 0;
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offsets[4] += 1;
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offsets[6] += 1;
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} else if (x == WP_WID - 1) {
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offsets[3] = 0;
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offsets[5] -= 1;
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offsets[7] -= 1;
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}
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// add up all samples, divide, subtract prev frame's center
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int8_t *p;
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for (p = offsets, value = 0; p < offsets + 8; p++)
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value += oldpg[offset + (*p)];
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value = (value >> 2) - newpg[offset];
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// reduce intensity gradually over time
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newpg[offset] = value - (value >> 3);
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}
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}
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#ifdef INTERPOLATE
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}
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#endif
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// draw the water on the keys
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for (auto key_addr : KeyAddr::all()) {
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int8_t height = oldpg[pgm_read_byte(rc2pos + key_addr.toInt())];
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#ifdef INTERPOLATE
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if (now & 1) { // odd frames only
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// average height with other frame
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height = ((int16_t)height + newpg[pgm_read_byte(rc2pos + key_addr.toInt())]) >> 1;
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}
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#endif
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uint8_t intensity = abs(height) * 2;
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uint8_t saturation = 0xff - intensity;
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uint8_t value = (intensity >= 128) ? 255 : intensity << 1;
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int16_t hue = ripple_hue;
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if (ripple_hue == WavepoolEffect::rainbow_hue) {
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// color starts white but gets dimmer and more saturated as it fades,
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// with hue wobbling according to height map
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hue = (current_hue + height + (height >> 1)) & 0xff;
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}
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cRGB color = hsvToRgb(hue, saturation, value);
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::LEDControl.setCrgbAt(key_addr, color);
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}
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#ifdef INTERPOLATE
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// swap pages every other frame
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if (!(now & 1)) page_ ^= 1;
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#else
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// swap pages every frame
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page_ ^= 1;
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#endif
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}
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}
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}
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kaleidoscope::plugin::WavepoolEffect WavepoolEffect;
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#endif
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