From bcebde545d45c08b518f79bfa393353d67d71391 Mon Sep 17 00:00:00 2001
From: Felix Pankratz <mail@felixpankratz.de>
Date: Sat, 7 Dec 2024 20:40:06 +0100
Subject: [PATCH] =?UTF-8?q?=F0=9F=98=8C=20don't=20draw=20trails=20on=20fir?=
 =?UTF-8?q?st=20drop?=
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---
 nametag/src/main.cpp | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/nametag/src/main.cpp b/nametag/src/main.cpp
index ed3c95c..00480b8 100644
--- a/nametag/src/main.cpp
+++ b/nametag/src/main.cpp
@@ -42,6 +42,7 @@ int line_speed[PANEL_WIDTH]; // how fast each line moves
 unsigned long line_last_moved[PANEL_WIDTH];
 
 typedef struct {
+    bool reached_bottom = false;
     int y;
     int length;
     int speed;
@@ -59,12 +60,7 @@ void setup(){
     raindrops[i].length = random(20, 28);
     raindrops[i].speed = random(25, 100);
     raindrops[i].last_moved = millis();
-    //raindrops[i] = rd;
-
-    //line_pos[i] = 0 - random(24);
-    //line_length[i] = random(20, 28);
-    //line_speed[i] = random(25, 100);
-    //line_last_moved[i] = millis();
+    //raindrops[i].reached_bottom = false;
   }
   // redefine pins if required
   HUB75_I2S_CFG::i2s_pins _pins={R1, G1, BL1, R2, G2, BL2, CH_A, CH_B, CH_C, CH_D, CH_E, LAT, OE, CLK};
@@ -100,6 +96,7 @@ void loop() {
     }
     if (raindrops[x].y > PANEL_HEIGHT) {
       raindrops[x].y = 0;
+      raindrops[x].reached_bottom = true;
     }
     if (raindrops[x].y >= 0) {
       //draw our pixel
@@ -114,7 +111,7 @@ void loop() {
           } else {
             matrix->drawPixel(x, trail_y, matrix->color565(0, (255 / raindrops[x].length) * (raindrops[x].length - trail_offset), 0));
           }
-        } else {
+        } else if (raindrops[x].reached_bottom) {
           int pixel_num = ((PANEL_HEIGHT + trail_y) * PANEL_WIDTH) + x;
           if (line_pos[x] >= 0) {
             if (overlay[ pixel_num / 8 ] & (1 << (7 - (pixel_num % 8)) )) {