Added wind to rain demo.

1 files changed, 31 insertions, 5 deletions

diff --git a/xd.c b/xd.c
index abdb1c8..bf620e8 100644
--- a/xd.c
+++ b/xd.c
@@ -299,7 +299,7 @@ static DemoInfo		demotbl[NO_DEMOS]=
 				UsesPixmap
 			    },
 			    {
-				"Rain Demo",
+				"Rain Demo (LMB to change wind)",
 				RainDemo,
 				UsesPixmap
 			    },
@@ -5114,6 +5114,8 @@ static void RainDemo(void)
 
     static Dribble dribble[MAX_DRIBBLES];
 
+    static int wind;
+
     int f, r;
 
     if (!init)
@@ -5136,6 +5138,28 @@ static void RainDemo(void)
 
     Cls();
 
+    if (mouse_b&Button1Mask)
+    {
+	static time_t bounce=0;
+
+	if (bounce!=time(NULL))
+	{
+	    switch(wind)
+	    {
+	    	case 0:
+		    wind = 1;
+		    break;
+	    	case 1:
+		    wind = -1;
+		    break;
+	    	case -1:
+		    wind = 0;
+		    break;
+	    }
+	    bounce=time(NULL);
+	}
+    }
+
     if (RND(100) > 95)
     {
     	for(f = 0; f < MAX_DROPS && drop[f].alive; f++)
@@ -5148,7 +5172,7 @@ static void RainDemo(void)
 	    drop[f].life = RND2(height-20, height/2);
 	    drop[f].y = 0;
 	    drop[f].r = 0;
-	    drop[f].x = RND(width);
+	    drop[f].x = RND(width) - (wind * width / 2);
 	}
     }
 
@@ -5163,7 +5187,7 @@ static void RainDemo(void)
 	    dribble[f].alive = TRUE;
 	    dribble[f].life = height + DRIBBLE_LEN;
 	    dribble[f].y = 0;
-	    dribble[f].x = RND(width);
+	    dribble[f].x = RND(width) - (wind * width / 2);
 
 	    for(r = 0; r < DRIBBLE_LEN; r++)
 	    {
@@ -5193,7 +5217,7 @@ static void RainDemo(void)
 		if (dribble[f].life > 0)
 		{
 		    dribble[f].y++;
-		    dribble[f].x += RND(3) - 1;
+		    dribble[f].x += RND(3) - 1 + wind;
 		    dribble[f].life--;
 
 		    for(r = 0; r < DRIBBLE_LEN; r++)
@@ -5223,10 +5247,12 @@ static void RainDemo(void)
 	    if (drop[f].life > 0)
 	    {
 		drop[f].y++;
+		drop[f].x += wind;
 		drop[f].life--;
 
 		FCircle(drop[f].x, drop[f].y, 3, blue);
-		Line(drop[f].x, drop[f].y, drop[f].x, drop[f].y - 5, blue);
+		Line(drop[f].x, drop[f].y,
+		     drop[f].x - wind * 5, drop[f].y - 5, blue);
 	    }
 	    else
 	    {