From 3ccd572165cb06076b6c90cef219d2ea4bc9d44f Mon Sep 17 00:00:00 2001
From: Ian C <ianc@noddybox.co.uk>
Date: Fri, 19 Oct 2018 08:08:51 +0000
Subject: Added bounce to catwalk demo.  Also tweaked parameters.

---
 xd.c | 79 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-------
 1 file changed, 71 insertions(+), 8 deletions(-)

(limited to 'xd.c')

diff --git a/xd.c b/xd.c
index cdba2ca..ed6b6a9 100644
--- a/xd.c
+++ b/xd.c
@@ -262,7 +262,7 @@ static DemoInfo		demotbl[NO_DEMOS]=
 				UsesPixmap
 			    },
 			    {
-				"Catwalk trench (RMB to change draw mode)",
+				"Catwalk trench (LMB to toggle bounce. RMB to change draw mode)",
 				CatwalkDemo,
 				UsesPixmap
 			    },
@@ -3771,7 +3771,7 @@ static void FollowDemo(void)
 #define TRENCH_X	300
 #define TRENCH_Y_TOP	-200
 #define TRENCH_Y_BOT	100
-#define TRENCH_Z_MAX	10000
+#define TRENCH_Z_MAX	20000
 #define TRENCH_Z_MIN	10
 #define TRENCH_CWH	50
 
@@ -3779,7 +3779,7 @@ static void CatwalkDemo(void)
 {
     static const int speed=5;
 
-    static unsigned long col[2];
+    static unsigned long col[3];
 
     static Point3D trench_point[8] = 
     {
@@ -3821,7 +3821,7 @@ static void CatwalkDemo(void)
 	{8,3,{0,0,0},trench_point,trench_poly,trench_work_3d,trench_work_xp,
 		0,0,0,MODE_WIRE,-1,True};
 
-    static const int no_catwalk = 5;
+    static const int no_catwalk = 10;
 
     static Obj3D *catwalk;
 
@@ -3829,14 +3829,23 @@ static void CatwalkDemo(void)
 
     static int init=FALSE;
 
+    static int move = FALSE;
+
+    static int move_y = 0;
+    static int move_yi = 0;
+
+    static int *catwalk_y;
+
     int f,r;
 
     if (!init)
     {
 	col[0]=GetCol(255, 255, 255);
 	col[1]=GetCol(255, 255, 0);
+	col[2]=GetCol(0, 0, 0);
 
 	catwalk = Grab(sizeof *catwalk * no_catwalk);
+	catwalk_y = Grab(sizeof *catwalk_y * no_catwalk);
 
 	for(f = 0; f < no_catwalk; f++)
 	{
@@ -3844,8 +3853,8 @@ static void CatwalkDemo(void)
 	    catwalk[f].no_poly = 1;
 
 	    catwalk[f].origin.x = 0;
-	    catwalk[f].origin.y = RND2(TRENCH_Y_BOT - TRENCH_CWH,
-				       TRENCH_Y_TOP + TRENCH_CWH);
+	    catwalk_y[f] = RND2(TRENCH_Y_BOT - TRENCH_CWH,
+			        TRENCH_Y_TOP + TRENCH_CWH);
 	    catwalk[f].origin.z = TRENCH_Z_MAX - 1500 * f;
 
 	    catwalk[f].ps = cw_point;
@@ -3868,6 +3877,29 @@ static void CatwalkDemo(void)
 	init=TRUE;
     }
 
+    if (mouse_b&Button1Mask)
+    {
+	static time_t bounce=0;
+
+	if (bounce!=time(NULL))
+	{
+	    move = !move;
+
+	    if (move)
+	    {
+	    	move_y = 0;
+		move_yi = 1;
+	    }
+	    else
+	    {
+	    	move_y = 0;
+		move_yi = 0;
+	    }
+
+	    bounce=time(NULL);
+	}
+    }
+
     if (mouse_b&Button3Mask)
     {
 	static time_t bounce=0;
@@ -3907,10 +3939,32 @@ static void CatwalkDemo(void)
 
     Cls();
 
+    trench.origin.y = move_y;
+
     DrawObj(&trench,col);
 
+    if (drawmode == MODE_SOLID)
+    {
+	trench.mode = MODE_WIRE;
+
+	for(f = 0; f < 3; f++)
+	{
+	    trench.poly[f].col = 2;
+	}
+
+	DrawObj(&trench,col);
+
+	trench.mode = MODE_SOLID;
+
+	for(f = 0; f < 3; f++)
+	{
+	    trench.poly[f].col = 0;
+	}
+    }
+
     for(f = 0; f < no_catwalk; f++)
     {
+    	catwalk[f].origin.y = catwalk_y[f] + move_y;
 	DrawObj(catwalk + f,col);
 
 	catwalk[f].origin.z -= speed;
@@ -3923,13 +3977,22 @@ static void CatwalkDemo(void)
 	for(f = no_catwalk-2; f >= 0; f--)
 	{
 	    catwalk[f+1] = catwalk[f];
+	    catwalk_y[f + 1] = catwalk_y[f];
 	}
 
 	catwalk[0] = t;
 
 	catwalk[0].origin.z = TRENCH_Z_MAX;
-	catwalk[0].origin.y = RND2(TRENCH_Y_BOT - TRENCH_CWH,
-				   TRENCH_Y_TOP + TRENCH_CWH);
+	catwalk_y[0] = RND2(TRENCH_Y_BOT - TRENCH_CWH,
+			    TRENCH_Y_TOP + TRENCH_CWH);
+    }
+
+    move_y += move_yi;
+
+    if (move_y >= 200 || move_y <= -90)
+    {
+    	move_yi = -move_yi;
+	move_y += move_yi;
     }
 }
 
-- 
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