From b9821ccd5ef334a9c4d4a053283021d026308a96 Mon Sep 17 00:00:00 2001
From: orange <mike@sprachgewalt.de>
Date: Mon, 10 Jun 2013 09:32:09 +0200
Subject: [PATCH] simple pong

---
 .gitignore     |  3 +++
 Makefile       |  2 +-
 ncurses-pong.c | 59 ++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 63 insertions(+), 1 deletion(-)
 create mode 100644 ncurses-pong.c

diff --git a/.gitignore b/.gitignore
index a43b0c7..b4e1f13 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,3 +7,6 @@ mandelbrot.bmp
 threads
 structs
 circular-buffer
+bit-fuckery
+bit-fuckery2
+ncurses-pong
diff --git a/Makefile b/Makefile
index 24297e5..d10bc25 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 CFLAGS=-std=c99 -Wall -g -O2
 INDENTOPTS=-kr --no-tabs --braces-on-func-def-line --indent-level2
 
-TARGETS=approximate-pi linked-list mandelbrot mandelbrot.bmp threads circular-buffer structs ncurses-pong bit-fuckery bit-fuckery2
+TARGETS=approximate-pi linked-list mandelbrot threads circular-buffer structs ncurses-pong bit-fuckery bit-fuckery2
 
 .PHONY: all
 all: $(TARGETS)
diff --git a/ncurses-pong.c b/ncurses-pong.c
new file mode 100644
index 0000000..3054dfe
--- /dev/null
+++ b/ncurses-pong.c
@@ -0,0 +1,59 @@
+#include <ncurses.h>
+#include <unistd.h>
+
+#define MAX_X 100.0
+#define MAX_Y 100.0
+#define MAX_R 24
+#define MAX_C 80
+
+void xy2rc(float x, float y, int *r, int *c) {
+  *c = (x / MAX_X) * MAX_C;
+  *r = MAX_R - ((y / MAX_Y) * MAX_R);
+}
+
+float ball_x = 0.0;
+float ball_y = 0.0;
+float dir_x = +2.0;
+float dir_y = +1.0;
+
+void move_ball(float x, float y) {
+  /* Move ball */
+  ball_x = x;
+  ball_y = y;
+}
+
+void paint_ball() {
+  int r, c;
+  xy2rc(ball_x, ball_y, &r, &c);
+  mvaddch(r, c, ACS_DIAMOND);
+}
+
+void paint() {
+  clear();
+  paint_ball();
+
+  refresh();
+}
+
+int main() {
+  initscr();    /* Start curses mode */
+  curs_set(0);  /* Disable cursor */
+
+  while(true) {
+    ball_x += dir_x;
+    ball_y += dir_y;
+
+    if (ball_x>MAX_X || ball_x<0) {
+      dir_x = -dir_x;
+    }
+    if (ball_y>MAX_Y || ball_y<0) {
+      dir_y = -dir_y;
+    }
+
+    paint();
+    usleep(50000);
+  }
+  refresh();    /* Print it on to the real screen */
+  getch();      /* Wait for user input */
+  endwin();     /* End curses mode */
+}