From 677385ffdd1e330cfba4dd712ca58595feeea41d Mon Sep 17 00:00:00 2001
From: schneefux <schneefux+commit@schneefux.xyz>
Date: Mon, 7 Oct 2013 14:11:24 +0200
Subject: initial commit

---
 ki.c | 167 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 167 insertions(+)
 create mode 100644 ki.c

(limited to 'ki.c')

diff --git a/ki.c b/ki.c
new file mode 100644
index 0000000..717ce98
--- /dev/null
+++ b/ki.c
@@ -0,0 +1,167 @@
+#include "global.h"
+#include "ki.h"
+#include "calc.h"
+#include "sprites.h"
+
+#include "mathf.h"
+
+static int kshoot(float x, float y)
+{
+	float xadd, yadd;
+	
+	if(Abs(x - player.x) > Abs(y - player.y))
+	{
+		xadd = sgn(player.x - x);
+		yadd = ((player.y - y) / Abs(x - player.x));
+	}
+	else
+	{
+		xadd = ((player.x - x) / Abs(y - player.y));
+		yadd =sgn(player.y - y);
+	}
+	
+	while(x < MAPSIZE && y < MAPSIZE && x >= 0 && y >= 0)
+	{
+		if((int)y == (int)player.y && (int)x == (int)player.x)
+		{
+			return TRUE;
+		}
+		if(solids[(int)x][(int)y] == SOLID)
+		{
+			break;
+		}
+		x += xadd;
+		y += yadd;
+	}
+	return FALSE;
+}
+
+static void kimove()
+{
+	int c;
+	int dirx, diry;
+	
+	for(c = 0; c < spritecnt; c++)
+	{
+		int fail[4] = {0}, success = FALSE;
+
+		if(sprites[c].type == TYPE_ENEMY)
+		{
+			while(!(fail[0] == TRUE && fail[1] == TRUE && fail[2] == TRUE && fail[3] == TRUE) && success == FALSE)
+			{
+				float newx, newy;
+				
+				if(kshoot(sprites[c].x, sprites[c].y) == TRUE)
+				{
+					if(Abs((player.x) - sprites[c].x) > 3)
+					{
+						dirx = (player.x > sprites[c].x)?1:(player.x == sprites[c].x)?0:-1;
+					}
+					else
+					{
+						dirx = 0;
+					}
+					
+					if(Abs((player.y) - sprites[c].y) > 3)
+					{
+						diry = (player.y > sprites[c].y)?1:(player.y == sprites[c].y)?0:-1;
+					}
+					else
+					{
+						diry = 0;
+					}
+					success = TRUE;
+				}
+				else
+				{
+					uint num;
+					
+					do
+					{
+						num = random() % 4;
+					}while(fail[num] == TRUE);
+					
+					fail[num] = TRUE;
+					
+					switch(num)
+					{
+						case 0:
+							dirx = 0;
+							diry = -1;
+							break;
+						case 1:
+							dirx = 1;
+							diry = 0;
+							break;
+						case 2:
+							dirx = 0;
+							diry = 1;
+							break;
+						case 3:
+							diry = 0;
+							dirx = -1;
+							break;
+					}
+				}
+				
+				newx = sprites[c].x + dirx;
+				newy = sprites[c].y + diry;
+				
+				if(newx < MAPSIZE && newx >= 0 && newy < MAPSIZE && newy  >= 0)
+				{
+					if(solids[(int)newx][(int)newy] == UNSOLID)
+					{
+						solids[(int)sprites[c].x][(int)sprites[c].y] = UNSOLID;
+						sprites[c].x = newx;
+						sprites[c].y = newy;
+						solids[(int)sprites[c].x][(int)sprites[c].y] = SPRITE;
+						success = TRUE;
+					}
+				}
+			}
+		}
+	}
+}
+
+static void kishoot(void)
+{
+	int c;
+	
+	for(c = 0; c < spritecnt; c++)
+	{
+		if(sprites[c].type == TYPE_ENEMY)
+		{
+			if(kshoot(sprites[c].x, sprites[c].y) == TRUE)
+			{
+				player.health -= 5;
+				output = 1;
+				statustimer = 0;
+				status = hitmsg;
+				BacklightOn();
+			}
+		}
+	}
+}
+
+void timer(void)
+{
+	static int ki = 0;
+	if(++ki == 10)
+	{
+		kimove();
+		ki = 0;
+		output = 1;
+	}
+	kishoot();
+}
+
+void kisetpos(float *x, float *y)
+{
+	do
+	{
+		*x = crand() % MAPSIZE + 0.5;
+		*y = crand() % MAPSIZE + 0.5;
+	}while(solids[(int)*x][(int)*y] != UNSOLID);
+
+	solids[(int)*x][(int)*y] = SPRITE;
+}
-- 
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