1 ! Copyright (C) 2007, 2008 Alex Chapman
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: accessors colors.constants combinators jamshred.log
4 jamshred.oint jamshred.sound jamshred.tunnel kernel locals math
5 math.constants math.order math.ranges math.vectors math.matrices
6 sequences shuffle specialized-arrays strings system ;
7 SPECIALIZED-ARRAY: float
18 ! speeds are in GL units / second
19 CONSTANT: default-speed 1.0
20 CONSTANT: max-speed 30.0
22 : <player> ( name sounds -- player )
23 [ float-array{ 0 0 5 } float-array{ 0 0 -1 } float-array{ 0 1 0 } float-array{ -1 0 0 } ] 2dip
24 f f 0 default-speed player boa ;
26 : turn-player ( player x-radians y-radians -- )
27 [ over ] dip left-pivot up-pivot ;
29 : roll-player ( player z-radians -- )
32 : to-tunnel-start ( player -- )
33 [ tunnel>> first dup location>> ]
34 [ tuck (>>location) (>>nearest-segment) ] bi ;
36 : play-in-tunnel ( player segments -- )
37 >>tunnel to-tunnel-start ;
39 : update-nearest-segment ( player -- )
40 [ tunnel>> ] [ dup nearest-segment>> nearest-segment ]
41 [ (>>nearest-segment) ] tri ;
43 : update-time ( player -- seconds-passed )
44 millis swap [ last-move>> - 1000 / ] [ (>>last-move) ] 2bi ;
46 : moved ( player -- ) millis swap (>>last-move) ;
48 : speed-range ( -- range )
51 : change-player-speed ( inc player -- )
52 [ + 0 max-speed clamp ] change-speed drop ;
54 : multiply-player-speed ( n player -- )
55 [ * 0 max-speed clamp ] change-speed drop ;
57 : distance-to-move ( seconds-passed player -- distance )
60 : bounce ( d-left player -- d-left' player )
62 [ dup nearest-segment>> bounce-off-wall ]
64 [ 3/4 swap multiply-player-speed ]
68 :: (distance) ( heading player -- current next location heading )
69 player nearest-segment>>
70 player [ tunnel>> ] [ nearest-segment>> ] bi heading heading-segment
71 player location>> heading ;
73 : distance-to-heading-segment ( heading player -- distance )
74 (distance) distance-to-next-segment ;
76 : distance-to-heading-segment-area ( heading player -- distance )
77 (distance) distance-to-next-segment-area ;
79 : distance-to-collision ( player -- distance )
80 dup nearest-segment>> (distance-to-collision) ;
82 : almost-to-collision ( player -- distance )
83 distance-to-collision 0.1 - dup 0 < [ drop 0 ] when ;
85 : from ( player -- radius distance-from-centre )
86 [ nearest-segment>> dup radius>> swap ] [ location>> ] bi
87 distance-from-centre ;
89 : distance-from-wall ( player -- distance ) from - ;
90 : fraction-from-centre ( player -- fraction ) from swap / ;
91 : fraction-from-wall ( player -- fraction )
92 fraction-from-centre 1 swap - ;
94 : update-nearest-segment2 ( heading player -- )
95 2dup distance-to-heading-segment-area 0 <= [
96 [ tunnel>> ] [ nearest-segment>> rot heading-segment ]
97 [ (>>nearest-segment) ] tri
102 :: move-player-on-heading ( d-left player distance heading -- d-left' player )
103 [let* | d-to-move [ d-left distance min ]
104 move-v [ d-to-move heading n*v ] |
105 move-v player location+
106 heading player update-nearest-segment2
107 d-left d-to-move - player ] ;
109 : distance-to-move-freely ( player -- distance )
110 [ almost-to-collision ]
111 [ [ forward>> ] keep distance-to-heading-segment-area ] bi min ;
113 : ?move-player-freely ( d-left player -- d-left' player )
115 ! must make sure we are moving a significant distance, otherwise
116 ! we can recurse endlessly due to floating-point imprecision.
117 ! (at least I /think/ that's what causes it...)
118 dup distance-to-move-freely dup 0.1 > [
119 over forward>> move-player-on-heading ?move-player-freely
123 : drag-heading ( player -- heading )
124 [ forward>> ] [ nearest-segment>> forward>> proj ] bi ;
126 : drag-player ( d-left player -- d-left' player )
127 dup [ [ drag-heading ] keep distance-to-heading-segment-area ]
128 [ drag-heading move-player-on-heading ] bi ;
130 : (move-player) ( d-left player -- d-left' player )
131 ?move-player-freely over 0 > [
137 : move-player ( player -- )
138 [ update-time ] [ distance-to-move ] [ (move-player) 2drop ] tri ;
140 : update-player ( player -- )
141 [ move-player ] [ nearest-segment>> "white" named-color swap (>>color) ] bi ;