From 5733a241a6e35dd539231c569bb54b7f1cb1e758 Mon Sep 17 00:00:00 2001
From: "Juan J. Martinez" <jjm@usebox.net>
Date: Thu, 22 Jun 2023 22:45:05 +0100
Subject: Player damage, invulnerability, death sequence and respawn

---
 src/player.c | 84 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 81 insertions(+), 3 deletions(-)

(limited to 'src/player.c')

diff --git a/src/player.c b/src/player.c
index a0b840f..7b51a35 100644
--- a/src/player.c
+++ b/src/player.c
@@ -28,11 +28,19 @@
 /* used for "coyote time" */
 #define MAX_MOMENTUM 8
 
+/* how many frames the player is invulerable after loosing a life */
+#define INVULN_TIME 96
+
 #define IS_NOT_GOING_UP(x) (gravity == GRAVITY_OFF || (x)>=GRAVITY_DOWN)
 
 static uint16_t x, y;
 static uint8_t dir, frame, delay, gravity, jump, momentum;
 
+static uint16_t respawn_x, respawn_y;
+static uint8_t respawn_dir;
+
+static uint8_t invuln, dying;
+
 const uint8_t gravity_seq[GRAVITY_SEQ_LEN] = {
     6, 4, 4, 2, 2, 2, 2, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 2, 2, 2, 2, 4
 };
@@ -71,21 +79,74 @@ static const Rect frames[2][6] =
 
 void player_init(uint16_t start_x, uint8_t start_y, uint8_t start_dir)
 {
-    dir = start_dir;
+    respawn_dir = dir = start_dir;
     frame = FRAME_STANDING;
     delay = 0;
     jump = 0;
     momentum = 0;
+    invuln = 0;
+    dying = 0;
 
-    x = start_x;
-    y = start_y;
+    respawn_x = x = start_x;
+    respawn_y = y = start_y;
     gravity = GRAVITY_OFF;
 }
 
+static void player_dying()
+{
+    if (gravity != GRAVITY_OFF)
+    {
+        uint8_t steps = gravity_seq[gravity - 1];
+
+        if (gravity > GRAVITY_DOWN)
+        {
+            /* going down! */
+            for (uint8_t i = 0; i < steps; i++)
+            {
+                /* exit screen */
+                if (y > MAP_H * MAP_TILE_H)
+                {
+                    /* if there are lifes left, respawn */
+                    if (dec_lives())
+                    {
+                        player_init(respawn_x, respawn_y, respawn_dir);
+                        invuln = INVULN_TIME;
+                    }
+
+                    /* stop falling */
+                    gravity = GRAVITY_OFF;
+                    return;
+                }
+                y++;
+            }
+        }
+        else
+        {
+            /* going up! */
+            if (y < steps)
+                y = 0;
+            else
+                y -= steps;
+        }
+
+        if (gravity != GRAVITY_OFF && gravity != GRAVITY_SEQ_LEN)
+            gravity++;
+    }
+}
+
 void player_update()
 {
     uint8_t moved = 0;
 
+    if (dying)
+    {
+        player_dying();
+        return;
+    }
+
+    if (invuln)
+        invuln--;
+
     if (momentum)
         momentum--;
 
@@ -170,6 +231,11 @@ void player_update()
                 {
                     gravity = GRAVITY_OFF;
                     frame = FRAME_STANDING;
+
+                    /* is a deadly block? */
+                    if (map_is_deadly(x + 11, y + 16)
+                            || map_is_deadly(x + 4, y + 16))
+                        player_hit();
                     break;
                 }
                 y++;
@@ -222,5 +288,17 @@ void player_draw()
     Rect dst = { x, y + MAP_OFFS_Y, 16, 16 };
 
     read_buffer(bg, &dst);
+
+    if (invuln && (invuln & 4))
+        return;
+
     blitrc(binary_sprites_start, &frames[dir][frame], &dst);
 }
+
+void player_hit()
+{
+    /* TODO: pickaxe */
+    dying = 1;
+    frame = FRAME_DYING;
+    gravity = GRAVITY_UP;
+}
-- 
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