From adbcc2fac52f3730295b93c0343a6db07bb46bb1 Mon Sep 17 00:00:00 2001
From: Ian C <ianc@noddybox.co.uk>
Date: Thu, 8 Nov 2018 15:28:41 +0000
Subject: Added (pretty rubbish) dribbles to rain demo.

---
 xd.c | 85 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 84 insertions(+), 1 deletion(-)

diff --git a/xd.c b/xd.c
index 600850b..b46686a 100644
--- a/xd.c
+++ b/xd.c
@@ -5085,11 +5085,14 @@ static void FireworkDemo(void)
  */
 
 #define MAX_DROPS	40
+#define MAX_DRIBBLES	5
+#define DRIBBLE_LEN	30
 #define MAX_RADIUS	40
 
 static void RainDemo(void)
 {
     static int init = FALSE;
+    static unsigned cycle;
 
     typedef struct
     {
@@ -5101,7 +5104,17 @@ static void RainDemo(void)
 
     static Drop drop[MAX_DROPS];
 
-    int f;
+    typedef struct
+    {
+	int	alive;
+    	int	x,y;
+	int	lastx[DRIBBLE_LEN];
+	int	life;
+    } Dribble;
+
+    static Dribble dribble[MAX_DRIBBLES];
+
+    int f, r;
 
     if (!init)
     {
@@ -5126,6 +5139,71 @@ static void RainDemo(void)
 	}
     }
 
+    if (RND(100) > 98)
+    {
+    	for(f = 0; f < MAX_DRIBBLES && dribble[f].alive; f++)
+	{
+	}
+
+	if (f < MAX_DRIBBLES)
+	{
+	    dribble[f].alive = TRUE;
+	    dribble[f].life = height + DRIBBLE_LEN;
+	    dribble[f].y = 0;
+	    dribble[f].x = RND(width);
+
+	    for(r = 0; r < DRIBBLE_LEN; r++)
+	    {
+	    	dribble[f].lastx[r] = dribble[f].x;
+	    }
+	}
+    }
+
+    for(f = 0; f < MAX_DRIBBLES; f++)
+    {
+    	if (dribble[f].alive)
+	{
+	    FCircle(dribble[f].x, dribble[f].y, 3, blue);
+
+	    for(r = 0; r < DRIBBLE_LEN; r++)
+	    {
+		Plot(dribble[f].lastx[r], dribble[f].y - DRIBBLE_LEN + r, blue);
+	    }
+	}
+    }
+
+    if ((cycle % 5) == 0)
+    {
+	for(f = 0; f < MAX_DRIBBLES; f++)
+	{
+	    if (dribble[f].alive)
+	    {
+		if (dribble[f].life > 0)
+		{
+		    dribble[f].y++;
+		    dribble[f].x += RND(3) - 1;
+		    dribble[f].life--;
+
+		    for(r = 0; r < DRIBBLE_LEN; r++)
+		    {
+			if (r < DRIBBLE_LEN - 1)
+			{
+			    dribble[f].lastx[r] = dribble[f].lastx[r+1];
+			}
+			else
+			{
+			    dribble[f].lastx[r] = dribble[f].x;
+			}
+		    }
+		}
+		else
+		{
+		    dribble[f].alive = FALSE;
+		}
+	    }
+	}
+    }
+
     for(f = 0; f < MAX_DROPS; f++)
     {
     	if (drop[f].alive)
@@ -5152,9 +5230,14 @@ static void RainDemo(void)
 	    }
 	}
     }
+
+    cycle++;
 }
 
 #undef MAX_DROPS
+#undef MAX_DRIBBLES
+#undef DRIBBLE_LEN
+#undef MAX_RADIUS
 
 
 /* END OF FILE */
-- 
cgit v1.2.3