93 lines
2.8 KiB
Scheme
93 lines
2.8 KiB
Scheme
;; Game state and logic for the hero entity
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(define-module (game model hero)
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#:use-module (ice-9 pretty-print)
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#:use-module (srfi srfi-1)
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#:use-module (srfi srfi-9)
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#:use-module (srfi srfi-9 gnu)
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#:use-module (srfi srfi-64)
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#:use-module (chickadee math vector)
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#:use-module (game util pipe)
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#:use-module (game model level)
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#:use-module (game model runner)
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#:export (hero-load
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hero-state
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hero-bloat
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hero-position
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hero-x
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hero-y
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hero-update
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))
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(define-immutable-record-type <hero>
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(%make-hero runner bloat)
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hero?
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(runner hero-runner hero-with-runner)
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(bloat hero-bloat hero-with-bloat) ;; 0.0 to 2.0, how much the hero is inflated
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)
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(define default-state 'fall)
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(define default-bloat 1.0)
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(define (hero-load level)
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"Create a hero at the position in the level map"
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(let ((runner (runner-load (level-find-hero level))))
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(%make-hero runner default-bloat)))
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(define (hero-x hero)
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"return the x coordinate as an integer"
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(runner-x (hero-runner hero)))
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(define (hero-y hero)
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"return the y coordinate as an integer"
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(runner-y (hero-runner hero))
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)
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(define (hero-state hero)
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"return the current state of the hero"
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(runner-state (hero-runner hero)))
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(define (hero-position hero)
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"return the current position of the hero"
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(runner-position (hero-runner hero)))
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(define (collides? a b)
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"return true if the hero collides with the given position"
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(< (vec2-magnitude (vec2- a b)) level-cell-size))
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(define (blocked-by-door? level keys position)
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"return true if the hero is blocked by a door"
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(let ((door-position (level-find-goal level)))
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(and (collides? position door-position)
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(not (null? keys)))))
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(define (hero-update hero level inputs keys dt)
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(let ((new-runner (runner-update (hero-runner hero) level inputs dt)))
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(if (blocked-by-door? level keys (runner-position new-runner))
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hero
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(hero-with-runner hero new-runner)
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)))
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;; Tests
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(test-begin "hero-model")
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(let* ((level (level-parse "WWWWW\nW...W\nW.P.W\nW..HW\nWWWWW\n"))
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(hero (hero-load level))
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(default-position (level-find-hero level)))
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(test-assert (hero? hero))
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(test-equal default-bloat (hero-bloat hero))
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(test-equal 1.5 (hero-bloat (hero-with-bloat hero 1.5)))
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(test-equal default-bloat (hero-bloat hero)))
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(let* ((level (level-parse "WWGWW\nW.H.W\nW.P.W\nWWWWW\n"))
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(hero (hero-load level))
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(goal-position (level-find-goal level)))
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(test-assert (blocked-by-door? level '(dummy-key) goal-position))
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(test-assert (not (blocked-by-door? level '() goal-position)))
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(test-assert (blocked-by-door? level '(dummy-key) (vec2- goal-position (vec2 0 -15))))
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(test-assert (not (blocked-by-door? level '(dummy-key) (vec2- goal-position (vec2 0 -16))))))
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(test-end "hero-model")
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