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authorJuan J. Martinez <jjm@usebox.net>2023-06-21 23:01:18 +0100
committerJuan J. Martinez <jjm@usebox.net>2023-06-21 23:01:18 +0100
commit16c38fc10c7120bd86f69c25f179f7ed81262a70 (patch)
treed958b8e930c02695d8e64710c1c2d2d5654e7a0e /src
parentba2a2dbe3434a1ffc10542ca38e6116c0bde7b65 (diff)
downloadgold-mine-run-16c38fc10c7120bd86f69c25f179f7ed81262a70.tar.gz
gold-mine-run-16c38fc10c7120bd86f69c25f179f7ed81262a70.zip
Add "coyote time"
If the player moves and gains momentum, allow jumping then the gravity as already kicked in to make easier tricky jumps.
Diffstat (limited to 'src')
-rw-r--r--src/player.c20
1 files changed, 18 insertions, 2 deletions
diff --git a/src/player.c b/src/player.c
index 4fe916e..52595f4 100644
--- a/src/player.c
+++ b/src/player.c
@@ -25,10 +25,13 @@
#define GRAVITY_SEQ_LEN 24
+/* used for "coyote time" */
+#define MAX_MOMENTUM 8
+
#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;
+static uint8_t dir, frame, delay, gravity, jump, momentum;
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
@@ -72,6 +75,7 @@ void player_init(uint16_t start_x, uint8_t start_y)
frame = FRAME_STANDING;
delay = 0;
jump = 0;
+ momentum = 0;
x = start_x;
y = start_y;
@@ -82,6 +86,9 @@ void player_update()
{
uint8_t moved = 0;
+ if (momentum)
+ momentum--;
+
if (gravity == GRAVITY_OFF
&& !map_is_blocked(x + 4, y + 16)
&& !map_is_blocked(x + 11, y + 16))
@@ -93,9 +100,10 @@ void player_update()
if (keys[KEY_UP])
{
- if (gravity == GRAVITY_OFF && !jump)
+ if ((gravity == GRAVITY_OFF || momentum) && !jump)
{
jump = 1;
+ momentum = 0;
frame = FRAME_JUMPING;
gravity = GRAVITY_UP;
}
@@ -115,7 +123,11 @@ void player_update()
|| (!IS_NOT_GOING_UP(gravity)
&& !(map_is_blocked(x + 16, y + 15)
&& map_is_blocked(x + 16, y + 7))))
+ {
+ if (gravity == GRAVITY_OFF && momentum < MAX_MOMENTUM)
+ momentum += 4;
x++;
+ }
}
}
@@ -131,7 +143,11 @@ void player_update()
|| (!IS_NOT_GOING_UP(gravity)
&& !(map_is_blocked(x - 1, y + 15)
&& map_is_blocked(x - 1, y + 7))))
+ {
+ if (gravity == GRAVITY_OFF && momentum < MAX_MOMENTUM)
+ momentum += 4;
x--;
+ }
}
}