93 lines
No EOL
2.2 KiB
C++
93 lines
No EOL
2.2 KiB
C++
#ifndef PatternRain_H
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#define PatternRain_H
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// Codetastic 2024
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struct rainDrop {
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uint8_t x;
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uint8_t y;
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CRGB colour;
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};
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#define MAX_RAINDROPS 128
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class PatternRain : public Drawable {
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public:
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PatternRain()
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{
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name = (char *)"PatternRain";
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}
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void start() {
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buffer = (uint16_t *) malloc(((VPANEL_W*VPANEL_H)+1)*sizeof(uint16_t)); // always alloc an extra amount for XY
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}
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void stop() {
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free(buffer);
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}
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unsigned int drawFrame()
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{
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rain(32, 255, 224, 240, CRGB::Green);
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effects.ShowFrame();
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return 45; // 1000/45 frames per secton
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}
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private:
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struct rainDrop rainDrops[MAX_RAINDROPS];
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int rainDropPos = 0;
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uint16_t* buffer = NULL; // buffer of number
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void rain(byte backgroundDepth, byte maxBrightness, byte spawnFreq, byte tailLength, CRGB rainColor)
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{
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CRGBPalette16 rain_p( CRGB::Black, rainColor );
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// Dim routine
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for (int16_t i = 0; i < VPANEL_W; i++) {
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for (int16_t j = 0; j < VPANEL_H; j++) {
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uint16_t xy = XY16(i, j);
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effects.leds[xy].nscale8(tailLength);
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}
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}
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// Genrate a new raindrop if the randomness says we should
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if (random(255) < spawnFreq) {
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// Find a spare raindrop slot
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for (int d = 0; d < MAX_RAINDROPS; d++) {
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// This raindrop is done with, it has... dropped
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if (rainDrops[d].y >= VPANEL_H ) // not currently in use
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{
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rainDrops[d].colour = ColorFromPalette(rain_p, random(backgroundDepth, maxBrightness));
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rainDrops[d].x = random(VPANEL_W-1);
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rainDrops[d].y = 0;
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break; // exit until next time.
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}
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}
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} // end random spawn
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// Iterate through all the rainDrops, draw the drop pixel on the layer
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for (int d = 0; d < MAX_RAINDROPS; d++) {
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effects.setPixel(rainDrops[d].x, rainDrops[d].y++, rainDrops[d].colour);
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}
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}
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};
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#endif |