From f40768e82a9f396526c30c0bda10388f4746fbea Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pjm@nac.net>
Date: Tue, 21 May 2013 18:28:17 -0400
Subject: Add board clearing functions.

---
diff --git a/src/ball.c b/src/ball.c
index e816057..c9ec8f1 100644
--- a/src/ball.c
+++ b/src/ball.c
@@ -26,6 +26,12 @@ free_ball(struct ball *b)
 }
 
 void
+clear_ball(struct ball *b)
+{
+	mvprintw(b->y, b->x, " ");
+}
+
+void
 update_ball(struct ball *b)
 {
 	++b;
diff --git a/src/ball.h b/src/ball.h
index 6090c8e..7ba103f 100644
--- a/src/ball.h
+++ b/src/ball.h
@@ -14,6 +14,7 @@ struct ball {
 
 struct ball *new_ball(int x, int y);
 void free_ball(struct ball *b);
+void clear_ball(struct ball *b);
 void update_ball(struct ball *b);
 void draw_ball(struct ball *b);
 
diff --git a/src/game.c b/src/game.c
index c12d731..b496708 100644
--- a/src/game.c
+++ b/src/game.c
@@ -8,6 +8,7 @@
 
 static void wait(struct game *g);
 static void input(struct game *g);
+static void clear_game(struct game *g);
 static void update(struct game *g);
 static void draw(struct game *g);
 
@@ -45,6 +46,7 @@ run_game(struct game *g)
 
 	while (g->running) {
 		input(g);
+		clear_game(g);
 		update(g);
 		draw(g);
 		wait(g);
@@ -91,6 +93,21 @@ input(struct game *g)
 }
 
 static void
+clear_game(struct game *g)
+{
+	struct ball *b;
+
+	clear_paddle(&g->players[0]->paddle_h);
+	clear_paddle(&g->players[0]->paddle_v);
+	clear_paddle(&g->players[1]->paddle_h);
+	clear_paddle(&g->players[1]->paddle_v);
+
+	for (b = g->balls_head; b != NULL; b = b->next) {
+		clear_ball(b);
+	}
+}
+
+static void
 update(struct game *g)
 {
 	struct ball *b;
diff --git a/src/paddle.c b/src/paddle.c
index 4bf90fa..0028892 100644
--- a/src/paddle.c
+++ b/src/paddle.c
@@ -22,7 +22,7 @@ update_paddle(struct paddle *pad)
 }
 
 void
-draw_paddle(struct paddle *pad)
+clear_paddle(struct paddle *pad)
 {
 	int off;
 	int pos;
@@ -31,22 +31,36 @@ draw_paddle(struct paddle *pad)
 	off -= pad->size / 2;
 
 	if (pad->type == PADDLE_TYPE_H) {
-		for (pos = 0; pos < BOARD_WIDTH - 1; ++pos) {
-			mvprintw(pad->track, pos, " ");
-		}
 		for (pos = 0; pos < pad->size; ++pos) {
-			attr_on(WA_REVERSE, NULL);
 			mvprintw(pad->track, off + pos, " ");
-			attr_off(WA_REVERSE, NULL);
 		}
 	} else {
-		for (pos = 0; pos < BOARD_HEIGHT - 1; ++pos) {
-			mvprintw(pos, pad->track, " ");
+		for (pos = 0; pos < pad->size; ++pos) {
+			mvprintw(off + pos, pad->track, " ");
 		}
+	}
+}
+
+void
+draw_paddle(struct paddle *pad)
+{
+	int off;
+	int pos;
+
+	off = pad->pos;
+	off -= pad->size / 2;
+
+	attr_on(WA_REVERSE, NULL);
+
+	if (pad->type == PADDLE_TYPE_H) {
+		for (pos = 0; pos < pad->size; ++pos) {
+			mvprintw(pad->track, off + pos, " ");
+		}
+	} else {
 		for (pos = 0; pos < pad->size; ++pos) {
-			attr_on(WA_REVERSE, NULL);
 			mvprintw(off + pos, pad->track, " ");
-			attr_off(WA_REVERSE, NULL);
 		}
 	}
+
+	attr_off(WA_REVERSE, NULL);
 }
diff --git a/src/paddle.h b/src/paddle.h
index 714eca6..8d885b0 100644
--- a/src/paddle.h
+++ b/src/paddle.h
@@ -21,6 +21,7 @@ struct paddle {
 	int track;
 };
 
+void clear_paddle(struct paddle *pad);
 void update_paddle(struct paddle *pad);
 void draw_paddle(struct paddle *pad);
 
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