1 USING: accessors alien.c-types arrays combinators destructors
2 http.client io io.encodings.ascii io.files io.files.temp kernel
3 locals math math.matrices math.parser math.vectors opengl
4 opengl.capabilities opengl.gl opengl.demo-support sequences
5 splitting vectors words specialized-arrays alien.data ;
6 FROM: sequences => change-nth ;
7 QUALIFIED-WITH: alien.c-types c
8 SPECIALIZED-ARRAY: c:float
9 SPECIALIZED-ARRAY: c:uint
12 : numbers ( str -- seq )
13 " " split [ string>number ] map sift ;
15 : (parse-model) ( vs is -- vs is )
18 { [ dup length 5 = ] [ 3 head pick push ] }
19 { [ dup first 3 = ] [ rest over push ] }
24 : parse-model ( -- vs is )
25 100000 <vector> 100000 <vector> (parse-model) ;
27 : n ( vs triple -- n )
28 swap [ nth ] curry map
29 [ [ second ] [ first ] bi v- ] [ [ third ] [ first ] bi v- ] bi cross
32 : normal ( ns vs triple -- )
33 [ n ] keep [ rot [ v+ ] change-nth ] with with each ;
35 : normals ( vs is -- ns )
36 [ [ length { 0.0 0.0 0.0 } <array> ] keep ] dip
37 [ [ 2dup ] dip normal ] each drop
40 : read-model ( stream -- model )
41 ascii [ parse-model ] with-file-reader
42 [ normals ] 2keep 3array ;
44 : model-path ( -- path ) "bun_zipper.ply" temp-file ;
46 : model-url ( -- url ) "http://duriansoftware.com/joe/media/bun_zipper.ply" ;
48 : maybe-download ( -- path )
49 model-path dup exists? [
50 "Downloading bunny from " write
51 model-url dup print flush
55 :: (draw-triangle) ( ns vs triple -- )
61 : draw-triangles ( ns vs is -- )
62 GL_TRIANGLES [ [ (draw-triangle) ] with with each ] do-state ;
64 TUPLE: bunny-dlist list ;
65 TUPLE: bunny-buffers array element-array nv ni ;
67 : <bunny-dlist> ( model -- geom )
68 GL_COMPILE [ first3 draw-triangles ] make-dlist
71 : <bunny-buffers> ( model -- geom )
74 [ first concat ] [ second concat ] bi
75 append c:float >c-array underlying>>
76 GL_ARRAY_BUFFER swap GL_STATIC_DRAW <gl-buffer>
79 third concat c:uint >c-array underlying>>
80 GL_ELEMENT_ARRAY_BUFFER swap GL_STATIC_DRAW <gl-buffer>
84 } cleave bunny-buffers boa ;
86 GENERIC: bunny-geom ( geom -- )
87 GENERIC: draw-bunny ( geom draw -- )
89 M: bunny-dlist bunny-geom
92 M: bunny-buffers bunny-geom
93 dup [ array>> ] [ element-array>> ] bi [
94 { GL_VERTEX_ARRAY GL_NORMAL_ARRAY } [
95 GL_FLOAT 0 0 buffer-offset glNormalPointer
97 nv>> c:float heap-size * buffer-offset
98 [ 3 GL_FLOAT 0 ] dip glVertexPointer
101 GL_TRIANGLES swap GL_UNSIGNED_INT 0 buffer-offset glDrawElements
103 ] all-enabled-client-state
104 ] with-array-element-buffers ;
106 M: bunny-dlist dispose
107 list>> delete-dlist ;
109 M: bunny-buffers dispose
110 [ array>> ] [ element-array>> ] bi
111 delete-gl-buffer delete-gl-buffer ;
113 : <bunny-geom> ( model -- geom )
114 "1.5" { "GL_ARB_vertex_buffer_object" }
115 has-gl-version-or-extensions?
116 [ <bunny-buffers> ] [ <bunny-dlist> ] if ;