Forward extrapolation caused visible teleporting at every direction
change (ghosts jumping ~1.3 tiles at intersections). Replace with
lerp(prev, current, 0.5 + t/2) which starts the visual at the
midpoint (max 0.5 tile / 12px lag) and smoothly reaches the
destination. No jumps, no teleporting, minimal hitbox offset.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Switch from backward interpolation (lerp prev→current) to forward
extrapolation (current + (current-prev) * t). The visual now leads
toward the next tile, aligning with the logical hitbox so coins
disappear when Pac-Man visually reaches them.
When blocked (sync-prev! sets prev=current), the offset is zero
and the sprite stays at the current tile.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Entities now move smoothly between tiles instead of snapping. Previous
positions are tracked in pacman and ghost ADTs; the draw layer linearly
interpolates between prev and current based on movement timer progress.
Residual time is carried across movement ticks for consistent speed at
varying frame rates. Teleportation and ghost house exits call sync-prev!
to prevent cross-map interpolation artifacts.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Implement four ghosts (Blinky, Pinky, Inky, Clyde) with authentic
Pac-Man AI: Blinky chases directly, Pinky targets 2 tiles ahead
(with original up-direction bug), Inky uses vector doubling from
Blinky, Clyde switches to scatter within 8-tile radius.
Includes chase/scatter mode cycling, ghost house exit with staggered
delays, directional sprite rendering with animation, and ghost-pacman
collision detection.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
The (pp1 graphics) library resolves colors via Racket's color database,
which doesn't support hex strings — they return #f causing a contract
violation on set-brush.
Replaced all hex colors with standard names:
#2121DE -> "medium blue", #FFB851 -> "gold", #FFB8FF -> "hot pink",
#FFFF00 -> "yellow", #FF0000 -> "red", #111111 -> "dark slate gray"
Also switched coins from draw-rectangle! to draw-ellipse! for round
dot rendering (arcade-accurate).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Key bug fix:
- Key sprite position was never set on startup, appearing at (0,0)
- Added init-key-position! called in start-drawing! to place key sprite
at its grid position on load
Arcade UI polish:
- Header bar with "PAC-MAN" title in yellow
- "SCORE" label above score value in header
- Sidebar separator uses wall color instead of white block
- "TIME" label with large countdown in sidebar area
- Coins now rendered as small centered dots (coin-size constant)
- Arcade color palette: #2121DE walls, #FFB851 coins, #FFB8FF doors
- "GAME OVER" overlay in red when time expires
- "PAUSED" overlay covers maze area only (not header)
- Window title set to "PAC-MAN"
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Named color constants (arcade blue walls, golden coins, pink doors)
- Header bar layout with PAC-MAN title, score label, key indicator
- Sidebar time display with label and large value
- Game over and pause overlay positions
- Smaller round-looking coins (coin-size + coin-inset)
- Removed old magic position values
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
On start!, connects level's coin/maze change callbacks to the draw
ADT's mark-coins-dirty! and mark-maze-dirty! methods. This completes
the event chain: level state change -> dirty flag -> redraw next frame.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Level now fires callbacks when game state changes that require redrawing:
- on-coins-changed!: fired when a coin is eaten or key is picked up
- on-maze-changed!: fired when a door is removed
Exposes set-on-coins-changed! and set-on-maze-changed! messages so the
game ADT can wire these to the draw ADT's dirty flags.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Previously every frame: cleared+redrawed 868 cells for coins, cleared+
redrawed all UI text, emptied+recreated pause layer, and swapped key
sprites repeatedly.
Now uses dirty flags and cached values:
- Coins: only redrawn when coins-dirty? is set (on coin eat/key pickup)
- Maze: only redrawn when a door is removed
- UI: only redrawn when score or time string actually changes
- Key: sprite swap happens exactly once, not every frame
- Pause: layer only modified when paused? state transitions
Exposes mark-coins-dirty! and mark-maze-dirty! messages so the game
ADT can signal changes from the level.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Pac-Man now moves automatically in its current direction every
pacman-speed-ms (200ms). Arrow keys queue a desired turn direction
instead of moving directly. Each movement tick:
1. Try the queued direction — if passable, turn and move that way
2. Otherwise keep moving in the current direction
3. Stop only when hitting a wall (no direction change)
New internal state:
- queued-direction: the direction the player wants to turn next
- movement-timer: accumulates delta-time, triggers move at interval
New helper:
- can-move?: checks if a direction is passable (no wall/locked door)
Changed behavior:
- key-press! now sets queued-direction instead of calling move-pacman!
- update! now drives movement via advance-pacman! on a timer
- move-pacman! no longer checks time-up? (advance-pacman! handles it)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Adds a 200ms movement tick rate, controlling how fast Pac-Man moves
automatically through the maze.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
The draw callback receives no delta-time, so animation was stuck at 0.
Split draw-pacman! into draw (position/rotation) and animate-pacman!
(sprite sequence advancement). Animation is now called from the game
loop which has the real delta-time.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
New structure groups all ADT modules under adt/ directory, removing
redundant adt- prefix from filenames. Library names now read as
(pacman-project adt position) etc. All imports updated accordingly.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Renamed files: constanten→constants, adt-positie→adt-position,
adt-doolhof→adt-maze, adt-sleutel→adt-key, adt-tijdslimiet→adt-timer,
adt-teken→adt-draw, adt-spel→adt-game. All message names, variables,
comments, and tests converted to English.
Also fixed counter location bug (time-label x/y were swapped).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Tests for Positie, Doolhof, Pac-Man, Score, and Tijdslimiet ADTs
using check/check-eq?/run-test from (pp1 tests) library.
Centralized test runner in alle-testen.rkt with prefix imports.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Connects level (logic) with teken (graphics) via callbacks.
Follows snake-wpo adt-spel pattern exactly.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
All rendering (maze, coins, key, pacman, UI, pause) consolidated here.
Grid-to-pixel conversion happens exclusively in this ADT.
Follows snake-wpo pattern with callback registration.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Combines game-logic, keyboard-handler, main-loop, and pause-menu into
single level ADT. Handles movement, collision, teleportation, coin/key
pickup, door opening, pause toggling, and time updates. No graphics.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Pure logic ADT with verlaag!/verhoog! mutators, tijd-op? predicate,
and formatteer-tijd method. No graphics code.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Pure logic ADT with punten getter and verhoog! mutator.
Uses punten-per-muntje constant. No graphics code.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Pure logic ADT with positie, opgepakt? predicate, pak-op! mutator.
Random placement logic uses doolhof ADT. No graphics code.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Pure logic ADT with grid-based positie, richting, beweeg! method.
All sprite/animation code removed - drawing responsibility in adt-teken.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Pure logic ADT with grid data, cell predicates (muur?, muntje?, etc.),
mutators (cel-set!, verwijder-deur!), and voor-elke-cel iterator.
All graphics code removed - drawing responsibility moved to adt-teken.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Constructor maak-positie returns dispatch closure with rij/kolom getters,
rij!/kolom! mutators, vergelijk? predicate, and beweeg method.
All coordinates are in grid units, not pixels.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
All hardcoded values (cell sizes, offsets, sprite scales, timing, score,
UI positions, cell type codes) are now named constants in an R7RS library.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
