--- /dev/null
+! Copyright (C) 2010 Erik Charlebois
+! See http://factorcode.org/license.txt for BSD license.
+USING: accessors arrays assocs grouping hashtables kernel
+locals math math.parser sequences sequences.deep
+specialized-arrays.instances.alien.c-types.float
+specialized-arrays.instances.alien.c-types.uint splitting xml
+xml.data xml.traversal math.order
+
+combinators
+images
+gpu.shaders
+io prettyprint
+;
+IN: collada
+
+TUPLE: model attribute-buffer index-buffer vertex-format ;
+TUPLE: source semantic offset data ;
+
+:: collect-sources ( sources vertices inputs -- sources )
+ inputs
+ [| input |
+ input "source" attr rest vertices first =
+ [
+ vertices second [| vertex |
+ vertex first
+ input "offset" attr string>number
+ vertex second rest sources at source boa
+ ] map
+ ]
+ [
+ input [ "semantic" attr ]
+ [ "offset" attr string>number ]
+ [ "source" attr rest sources at ] tri source boa
+ ] if
+ ] map flatten ;
+
+: string>numbers ( string -- number-seq )
+ " \t\n" split [ string>number ] map ; inline
+
+: x/ ( x x -- x ) tag-named ; inline
+: x@ ( x x -- x ) attr ; inline
+: xt ( x -- x ) children>string ; inline
+
+: map-tags-named ( tag string quot -- seq )
+ [ tags-named ] dip map ; inline
+
+SINGLETONS: x-up y-up z-up ;
+GENERIC: up-axis-swizzle! ( from-axis seq -- seq )
+M: x-up up-axis-swizzle!
+ drop dup
+ [
+ [ 0 swap nth neg ]
+ [ 1 swap nth ]
+ [ 2 swap nth ] tri
+ swap -rot
+ ] [
+ [ 2 swap set-nth ]
+ [ 1 swap set-nth ]
+ [ 0 swap set-nth ] tri
+ ] bi ;
+M: y-up up-axis-swizzle! drop ;
+M: z-up up-axis-swizzle!
+ drop dup
+ [
+ [ 0 swap nth ]
+ [ 1 swap nth ]
+ [ 2 swap nth neg ] tri
+ swap
+ ] [
+ [ 2 swap set-nth ]
+ [ 1 swap set-nth ]
+ [ 0 swap set-nth ] tri
+ ] bi ;
+
+: source>array ( source-tag up-axis scale -- array )
+ rot
+ [ "float_array" x/ xt string>numbers [ * ] with map ]
+ [ nip "technique_common" x/ "accessor" x/ "stride" x@ string>number ] 2bi
+ <groups>
+ [ swap up-axis-swizzle! ] with map ;
+
+:: collada-mesh>model ( mesh-tag -- models )
+ mesh-tag "source" [
+ [ "id" x@ ]
+ [
+ [ "float_array" x/ xt string>numbers ]
+ [ "technique_common" x/ "accessor" x/ "stride" x@ string>number ] bi <groups>
+ ] bi 2array
+ ] map-tags-named >hashtable :> sources
+
+ mesh-tag "vertices" tag-named
+ [ "id" attr ]
+ [
+ "input" tags-named [
+ [ "semantic" attr ] [ "source" attr ] bi 2array
+ ] map
+ ]
+ bi 2array :> vertices
+
+ mesh-tag "triangles" tags-named
+ [| triangle |
+ triangle "count" attr string>number :> count
+ sources vertices triangle "input" tags-named collect-sources :> flattened-sources
+ triangle "p" tag-named children>string " \t\n" split [ string>number ] map :> indices
+ flattened-sources [ offset>> ] [ max ] map-reduce :> max-offset
+ indices dup length count / <groups> [ max-offset 1 + <groups> ] map :> triangles-indices
+
+ V{ } clone :> index-buffer
+ V{ } clone :> attribute-buffer
+ V{ } clone :> vertex-format
+ H{ } clone :> inverse-attribute-buffer
+
+ triangles-indices [
+ [
+ [| triangle-index triangle-offset |
+ triangle-index triangle-offset flattened-sources
+ [| index offset source |
+ source offset>> offset = [
+ index source data>> nth
+ ] [ f ] if
+ ] with with map sift flatten :> blah
+
+ blah inverse-attribute-buffer at [
+ index-buffer push
+ ] [
+ attribute-buffer length
+ [ blah inverse-attribute-buffer set-at ]
+ [ index-buffer push ] bi
+ blah attribute-buffer push
+ ] if*
+ ] each-index
+ ] each
+ ] each
+
+ attribute-buffer flatten >float-array
+ index-buffer flatten >uint-array
+ flattened-sources [
+ {
+ [ semantic>> ]
+ [ drop float-components ]
+ [ data>> first length ]
+ [ drop f ]
+ } cleave vertex-attribute boa
+ ] map
+ model boa
+ ] map
+
+ ;
--- /dev/null
+! Copyright (C) 2010 Erik Charlebois
+! See http://factorcode.org/license.txt for BSD license.
+USING: accessors alien.c-types arrays classes.struct combinators
+combinators.short-circuit game.loop game.worlds gpu gpu.buffers
+gpu.util.wasd gpu.framebuffers gpu.render gpu.shaders gpu.state
+gpu.textures gpu.util grouping http.client images images.loader
+io io.encodings.ascii io.files io.files.temp kernel locals math
+math.matrices math.vectors.simd math.parser math.vectors
+method-chains namespaces sequences splitting threads ui ui.gadgets
+ui.gadgets.worlds ui.pixel-formats specialized-arrays
+specialized-vectors literals collada fry xml xml.traversal sequences.deep
+
+opengl.gl
+prettyprint ;
+FROM: alien.c-types => float ;
+SPECIALIZED-ARRAY: float
+SPECIALIZED-VECTOR: uint
+IN: collada.viewer
+
+GLSL-SHADER: collada-vertex-shader vertex-shader
+uniform mat4 mv_matrix, p_matrix;
+uniform vec3 light_position;
+
+attribute vec3 POSITION;
+
+void main()
+{
+ vec4 position = mv_matrix * vec4(POSITION, 1.0);
+ gl_Position = p_matrix * position;
+}
+;
+
+GLSL-SHADER: collada-fragment-shader fragment-shader
+void main()
+{
+ gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);
+}
+;
+
+GLSL-PROGRAM: collada-program
+ collada-vertex-shader collada-fragment-shader ;
+
+UNIFORM-TUPLE: collada-uniforms < mvp-uniforms
+ { "light-position" vec3-uniform f } ;
+
+TUPLE: collada-state
+ models
+ vertex-arrays
+ index-vectors ;
+
+TUPLE: collada-world < wasd-world
+ { collada collada-state } ;
+
+VERTEX-FORMAT: collada-vertex
+ { "POSITION" float-components 3 f }
+ { f float-components 3 f } ;
+
+:: mymax ( x y -- x ) x third y third > [ x ] [ y ] if ;
+
+: <collada-buffers> ( models -- buffers )
+ ! drop
+ ! float-array{ -0.5 0 0 0 0 0 0 1 0 0 0 0 0.5 0 0 0 0 0 }
+ ! uint-array{ 0 1 2 }
+ ! f model boa 1array
+ [
+ [ attribute-buffer>> underlying>> static-upload draw-usage vertex-buffer byte-array>buffer ]
+ [ index-buffer>> underlying>> static-upload draw-usage index-buffer byte-array>buffer ]
+ [ index-buffer>> length ] tri 3array
+ ] map ;
+
+: fill-collada-state ( collada-state -- )
+ dup models>> <collada-buffers>
+ [
+ [
+ first collada-program <program-instance> collada-vertex buffer>vertex-array
+ ] map >>vertex-arrays drop
+ ]
+ [
+ [
+ [ second ] [ third ] bi
+ '[ _ 0 <buffer-ptr> _ uint-indexes <index-elements> ] call
+ ] map >>index-vectors drop
+ ] 2bi ;
+
+: <collada-state> ( -- collada-state )
+ collada-state new
+ "C:/Users/erikc/Downloads/mech.dae" file>xml "mesh" deep-tags-named [ collada-mesh>model ] map flatten >>models ;
+
+M: collada-world begin-game-world
+ init-gpu
+ { 0.0 0.0 2.0 } 0 0 set-wasd-view
+ <collada-state> [ fill-collada-state drop ] [ >>collada drop ] 2bi ;
+
+: <collada-uniforms> ( world -- uniforms )
+ [ wasd-mv-matrix ] [ wasd-p-matrix ] bi
+ { -10000.0 10000.0 10000.0 } ! light position
+ collada-uniforms boa ;
+
+: draw-collada ( world -- )
+ GL_COLOR_BUFFER_BIT glClear
+ triangle-lines dup t <triangle-state> set-gpu-state
+ [ collada>> vertex-arrays>> ]
+ [ collada>> index-vectors>> ]
+ [ <collada-uniforms> ]
+ tri
+ [
+ {
+ { "primitive-mode" [ 3drop triangles-mode ] }
+ { "uniforms" [ swap drop swap drop ] }
+ { "vertex-array" [ drop drop ] }
+ { "indexes" [ drop swap drop ] }
+ } 3<render-set> render
+ ] curry 2each ;
+
+M: collada-world draw-world*
+ draw-collada ;
+
+M: collada-world wasd-movement-speed drop 1/16. ;
+M: collada-world wasd-near-plane drop 1/32. ;
+M: collada-world wasd-far-plane drop 1024.0 ;
+
+GAME: collada-game {
+ { world-class collada-world }
+ { title "Collada Viewer" }
+ { pixel-format-attributes {
+ windowed
+ double-buffered
+ } }
+ { grab-input? t }
+ { use-game-input? t }
+ { pref-dim { 1024 768 } }
+ { tick-interval-micros $[ 60 fps ] }
+ } ;
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