Add time monster

1 files changed, 86 insertions, 0 deletions

diff --git a/src/tmonster.c b/src/tmonster.c
new file mode 100644
index 0000000..30d5714
--- /dev/null
+++ b/src/tmonster.c
@@ -0,0 +1,86 @@
+#include <stdint.h>
+#include <stdlib.h>
+
+#include "vga.h"
+#include "map.h"
+#include "entities.h"
+#include "game.h"
+
+#include "player.h"
+
+#include "tmonster.h"
+
+#define WAIT 120
+#define MOVE_TIME 90
+
+static const Rect frames[2 * 4] =
+{
+    /* right */
+    { 96, 16, 144, 144 },
+    { 80, 48, 144, 144 },
+
+    /* not used */
+    { 0, 0, 144, 144 },
+    { 0, 0, 144, 144 },
+
+    /* left */
+    { 96, 16, 144, 144 },
+    { 96, 48, 144, 144 },
+
+    /* not used */
+    { 0, 0, 144, 144 },
+    { 0, 0, 144, 144 }
+};
+
+void tmonster_init(Entity *e)
+{
+    e->y = 16;
+    e->x = 32 + (rand() % 256);
+    e->dir = e->x > 160 ? DIR_LEFT : DIR_RIGHT;
+    e->frames = (const Rect *)frames;
+    e->update = tmonster_wait_update;
+}
+
+void tmonster_wait_update(Entity *e)
+{
+    e->delay++;
+    e->frame = (e->delay & 2) ? 1 : 0;
+
+    if (e->delay == WAIT)
+    {
+        e->delay = 0;
+        e->frame = 1;
+        e->update = tmonster_update;
+    }
+}
+
+void tmonster_update(Entity *e)
+{
+    e->delay++;
+    if (e->delay == WAIT * 2)
+        e->delay = 0;
+
+    if (e->delay < MOVE_TIME)
+    {
+        if (e->x > player_x() && e->x > 0)
+        {
+            e->dir = DIR_LEFT;
+            e->x--;
+        }
+        if (e->x < player_x() && e->x < (MAP_W * MAP_TILE_W) - 16)
+        {
+            e->dir = DIR_RIGHT;
+            e->x++;
+        }
+        if (e->y > player_y() && e->y > 0)
+            e->y--;
+        if (e->y < player_y() && e->y < (MAP_H * MAP_TILE_H) - 16)
+            e->y++;
+    }
+
+    if (player_collision(e))
+    {
+        player_hit();
+        reset_time();
+    }
+}