Add pikcups

WIP: only time and bonuses for now.

1 files changed, 195 insertions, 0 deletions

diff --git a/src/pickup.c b/src/pickup.c
new file mode 100644
index 0000000..6b53cda
--- /dev/null
+++ b/src/pickup.c
@@ -0,0 +1,195 @@
+#include <stdint.h>
+#include <stdlib.h>
+
+#include "vga.h"
+#include "entities.h"
+#include "game.h"
+
+#include "player.h"
+#include "effect.h"
+
+#include "pickup.h"
+
+#define MAX_FRAME 3
+#define MAX_BONUS_FRAME 4
+
+#define MAX_TTL ((uint16_t)800)
+
+typedef enum
+{
+    PICKUP_TIME = 0,
+    PICKUP_BONUS,
+    PICKUP_PICKAXE,
+    PICKUP_GOLD_KEY,
+    PICKUP_SILVER_KEY,
+} PickupType;
+
+static const Rect frames_in[2 * 4] =
+{
+    { 96, 16, 144, 144 },
+    { 128, 16, 144, 144 },
+    { 112, 16, 144, 144 },
+
+    /* not used */
+    { 0, 0, 144, 144 },
+    { 0, 0, 144, 144 },
+    { 0, 0, 144, 144 },
+    { 0, 0, 144, 144 },
+    { 0, 0, 144, 144 }
+};
+
+static const Rect frames[2 * 4] =
+{
+    /* time */
+    { 80, 16, 144, 144 },
+
+    /* pickaxe */
+    { 16, 32, 144, 144 },
+
+    /* gold key */
+    { 0, 0, 144, 144 },
+
+    /* siver key */
+    { 0, 0, 144, 144 },
+
+    /* not used */
+    { 0, 0, 144, 144 },
+    { 0, 0, 144, 144 },
+    { 0, 0, 144, 144 },
+    { 0, 0, 144, 144 }
+};
+
+static const Rect frames_bonus0[2 * 4] =
+{
+    { 0, 48, 144, 144 },
+    { 16, 48, 144, 144 },
+    { 32, 48, 144, 144 },
+    { 48, 48, 144, 144 },
+
+    /* not used */
+    { 0, 0, 144, 144 },
+    { 0, 0, 144, 144 },
+    { 0, 0, 144, 144 },
+    { 0, 0, 144, 144 }
+};
+
+static const Rect frames_bonus1[2 * 4] =
+{
+    { 0, 64, 144, 144 },
+    { 16, 64, 144, 144 },
+    { 32, 64, 144, 144 },
+    { 48, 64, 144, 144 },
+
+    /* not used */
+    { 0, 0, 144, 144 },
+    { 0, 0, 144, 144 },
+    { 0, 0, 144, 144 },
+    { 0, 0, 144, 144 }
+};
+
+static const Rect frames_bonus2[2 * 4] =
+{
+    { 64, 64, 144, 144 },
+    { 80, 64, 144, 144 },
+    { 96, 64, 144, 144 },
+    { 112, 64, 144, 144 },
+
+    /* not used */
+    { 0, 0, 144, 144 },
+    { 0, 0, 144, 144 },
+    { 0, 0, 144, 144 },
+    { 0, 0, 144, 144 }
+};
+
+static const Rect *frames_bonuses[] =
+{
+    frames_bonus0, frames_bonus1, frames_bonus2
+};
+
+void pickup_time_init(Entity *e)
+{
+    e->frames = (const Rect *)frames_in;
+    e->flags = PICKUP_TIME;
+    e->counter = MAX_TTL * 2 + (rand() % MAX_TTL);
+    e->update = pickup_wait_update;
+}
+
+void pickup_bonus_init(Entity *e)
+{
+    e->frames = (const Rect *)frames_in;
+    e->flags = PICKUP_BONUS;
+    e->counter = MAX_TTL + (rand() % MAX_TTL);
+    e->update = pickup_wait_update;
+}
+
+void pickup_wait_update(Entity *e)
+{
+    if (e->counter-- == 0)
+        e->update = pickup_in_update;
+}
+
+void pickup_in_update(Entity *e)
+{
+    if (e->delay++ == WALK_DELAY - 2)
+    {
+        e->delay = 0;
+        e->frame++;
+        if (e->frame == MAX_FRAME)
+        {
+            switch (e->flags)
+            {
+                case PICKUP_TIME:
+                    e->frames = (const Rect *)frames;
+                    e->frame = 0;
+                    e->counter = 0;
+                    e->update = pickup_update;
+                    break;
+                case PICKUP_BONUS:
+                    e->frames = (const Rect *)frames_bonuses[rand() % 3];
+                    e->frame = 0;
+                    e->counter = 0;
+                    e->update = pickup_update;
+                    break;
+            }
+
+        }
+    }
+}
+
+void pickup_update(Entity *e)
+{
+    if (e->counter++ == MAX_TTL)
+    {
+        effect_out_init(e);
+        return;
+    }
+
+    /* the bonuses have an animation */
+    if (e->flags == PICKUP_BONUS)
+    {
+        e->delay++;
+        /* first frame lasts longer */
+        if ((e->frame == 0 && e->delay == WALK_DELAY * 4)
+                || (e->frame != 0 && e->delay == WALK_DELAY - 2))
+        {
+            e->delay = 0;
+            e->frame++;
+            if (e->frame == MAX_BONUS_FRAME)
+                e->frame = 0;
+        }
+    }
+
+    if (player_collision(e))
+    {
+        switch (e->flags)
+        {
+            case PICKUP_TIME:
+                reset_time();
+                break;
+            case PICKUP_BONUS:
+                add_score(250);
+                break;
+        }
+        e->used = 0;
+    }
+}