From 39efe08dabc547f6f1929641c21c40029313757c Mon Sep 17 00:00:00 2001
From: Stefan `Sec` Zehl <sec@42.org>
Date: Fri, 12 Aug 2011 20:17:11 +0200
Subject: [PATCH] Add starfield loadable

---
 firmware/l0dable/starfld.c | 73 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 firmware/l0dable/starfld.c

diff --git a/firmware/l0dable/starfld.c b/firmware/l0dable/starfld.c
new file mode 100644
index 0000000..1a41eef
--- /dev/null
+++ b/firmware/l0dable/starfld.c
@@ -0,0 +1,73 @@
+#include <sysinit.h>
+
+#include "basic/basic.h"
+#include "basic/config.h"
+
+#include "lcd/lcd.h"
+#include "lcd/print.h"
+
+#include "usetable.h"
+
+#define NUM_STARS 150
+
+typedef struct {
+	short x, y, z, speed;
+} s_star;
+
+static s_star stars[NUM_STARS];
+
+void init_star(s_star *star, int z);
+
+void ram(void)
+{
+	short centerx = RESX >> 1;
+	short centery = RESY >> 1;
+	short i;
+
+	for (i = 0; i < NUM_STARS; i++) {
+		init_star(stars + i, i + 1);
+	}
+
+	while(getInputRaw()==BTN_NONE){
+		lcdClear();
+
+		for (i = 0; i < NUM_STARS; i++) {
+			stars[i].z -= stars[i].speed;
+
+			if (stars[i].z <= 0)
+				init_star(stars + i, i + 1);
+			
+			short tempx = ((stars[i].x * 30) / stars[i].z) + centerx;
+			short tempy = ((stars[i].y * 30) / stars[i].z) + centery;
+
+			if (tempx < 0 || tempx > RESX - 1 || tempy < 0 || tempy > RESY - 1) {
+				init_star(stars + i, i + 1);
+				continue;
+			}
+
+			lcdSetPixel(tempx, tempy, 1);
+			if (stars[i].z < 50) {
+				lcdSetPixel(tempx + 1, tempy, 1);
+			}
+			if (stars[i].z < 20) {
+				lcdSetPixel(tempx, tempy + 1, 1);
+				lcdSetPixel(tempx + 1, tempy + 1, 1);
+			}
+		}
+
+		lcdRefresh();
+
+        delayms_queue_plus(50,0);
+	}	
+}
+
+void init_star(s_star *star, int z)
+{
+	star->x = (getRandom() % RESX) - (RESX >> 1);
+	star->y = (getRandom() % RESY) - (RESY >> 1);
+	star->z = z;
+	star->speed = (getRandom() % 4) + 1;
+
+	return;
+}
+