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#ifndef PatternRain_H
#define PatternRain_H
// Codetastic 2024
struct rainDrop {
uint8_t x;
uint8_t y;
CRGB colour;
};
#define MAX_RAINDROPS 128
class PatternRain : public Drawable {
public:
PatternRain()
{
name = (char *)"PatternRain";
}
void start() {
buffer = (uint16_t *) malloc(((VPANEL_W*VPANEL_H)+1)*sizeof(uint16_t)); // always alloc an extra amount for XY
}
void stop() {
free(buffer);
}
unsigned int drawFrame()
{
rain(32, 255, 224, 240, CRGB::Green);
effects.ShowFrame();
return 45; // 1000/45 frames per secton
}
private:
struct rainDrop rainDrops[MAX_RAINDROPS];
int rainDropPos = 0;
uint16_t* buffer = NULL; // buffer of number
void rain(byte backgroundDepth, byte maxBrightness, byte spawnFreq, byte tailLength, CRGB rainColor)
{
CRGBPalette16 rain_p( CRGB::Black, rainColor );
// Dim routine
for (int16_t i = 0; i < VPANEL_W; i++) {
for (int16_t j = 0; j < VPANEL_H; j++) {
uint16_t xy = XY16(i, j);
effects.leds[xy].nscale8(tailLength);
}
}
// Genrate a new raindrop if the randomness says we should
if (random(255) < spawnFreq) {
// Find a spare raindrop slot
for (int d = 0; d < MAX_RAINDROPS; d++) {
// This raindrop is done with, it has... dropped
if (rainDrops[d].y >= VPANEL_H ) // not currently in use
{
rainDrops[d].colour = ColorFromPalette(rain_p, random(backgroundDepth, maxBrightness));
rainDrops[d].x = random(VPANEL_W-1);
rainDrops[d].y = 0;
break; // exit until next time.
}
}
} // end random spawn
// Iterate through all the rainDrops, draw the drop pixel on the layer
for (int d = 0; d < MAX_RAINDROPS; d++) {
effects.setPixel(rainDrops[d].x, rainDrops[d].y++, rainDrops[d].colour);
}
}
};
#endif
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