1. +
Scala LWJGL
3D
@chimerast

2. +
n
n Twitter: @chimerast
n Blog: http://chimera.st/
n Scala : 1
n LWJGL : 3
n NEET
n Web/
n Seasar Foundation S2Wicket 1.4
n wicket-ja, java-ja
n 3D
n 3D
n DirectX7 Immediate Mode

3. +
n
n
n
n
n
n
n
n
n
n

4. +
Scala 3D
n
n 3D (or )
n
n MikuMikuDance 3D
n
n Scala
n LWJGL
n Slick

5. +
MikuMikuDance
n
n http://www.geocities.jp/higuchuu4/
n
n DirectX
http://www.nicovideo.jp/watch/sm9647253
n
n
n
n
n JVM

6. +
Scala
A Scalable Language
n +
n
n
n Java 1
n 3D
scala> List(3,2,5,1).reduceLeft(math.max)
res0: Int = 5
n Java
n

7. +
LWJGL
Lightweight Java Game Library
n +
n http://www.lwjgl.org/
n OpenGL
n 3D API
n
n OpenAL
n 3D API
n
n OpenCL
n GPGPU GPU API
n
n

8. +
Slick
2D Game Library based on LWJGL
n LWJGL 2D
n http://slick.cokeandcode.com/
n LWJGL(OpenGL) 2D
n
n 2D
n
n
n SVG

9. +
LWJGL
n https://github.com/chimerast/scala-lwjgl-sample
n sbt
n
n 3D
n 3D
n LWJGL native java.library.path
n sbt fork

10. +
n 3D
n
n IK ( )
n
n
n
n
n
n

11. +
n
n
n 60fps(1 60 )
n 16ms

12. +
Java/Scala
n (GC)
n
n
n C++
n JIT C++ JIT
n SIMD C+
+
n SIMD 1CPU
n 10
n 3D

13. +
n
n
n Array[Float]
n
n Scala immutable.List
n GC
n
n Java
n OpenGL GPU
n GPU SIMD
n

14. +
Scala
:
.apply
.update
.foreach
.prepend
.append
.insert
java.util.ArrayList[AnyRef]
11
19
16
19,746
158
39,317
java.util.LinkedList[AnyRef]
38.622
388,877
43
152
141
320
Array[AnyRef]
1
21
174
-
-
-
mutable.ArrayBuffer[AnyRef]
11
19
122
19,734
172
40,118
mutable.ListBuffer[AnyRef]
94,595
94,861
367
119
170
95,643
mutable.Queue[AnyRef]
99.916
100,672
497
142
230
-
immutable.List[AnyRef]
94,543
4,718,559
312
175
2,482,455
-
immutable.Vector[AnyRef]
107
517
211
779
662
-
Scala
http://d.hatena.ne.jp/chimerast/20110304/1299237142
Array[AnyRef].apply JIT (DCE)
JIT

15. +
MikuMikuDance
n PMD (.pmd)
n 3D
n VMD (.vmd)
n 3D
n 2ch
n - MMD (PMD)
http://bit.ly/fFYlS
n
n
n AS3 (b2ox ): http://www.libspark.org/browser/as3/FLARMMD
n XNA (wilfrem ): http://sourceforge.jp/projects/mmdx/

16. +
PMD
n in MMD
n 3D
n
n
n
n IK
n
n
n Direct3D OpenGL
n
n OpenGL DirectX
n z

17. +
VMD
n
n
n
n
n
n

18. +
in Scala
val file = new File(path)
using(new RandomAccessFile(file, "r")) { f =>
val channel = f.getChannel
val buffer = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel.size)
buffer.order(ByteOrder.LITTLE_ENDIAN)
Some(new PMDModel(file, buffer))
}
class PMDModel(file: File, buffer: ByteBuffer) {
val header = new PMDHeader(buffer)
val vertices = Array.fill(buffer.getInt) { new PMDVertex(buffer) }
val indices = Array.fill(buffer.getInt) { buffer.getShort }
val materials = Array.fill(buffer.getInt) { new PMDMaterial(buffer) }
val bones = Array.fill(buffer.getShort) { new PMDBone(buffer) }
val iks = Array.fill(buffer.getShort) { new PMDIKData(buffer) }
val skins = Array.fill(buffer.getShort) { new PMDSkinData(buffer) }
val skinIndex = Array.fill(buffer.get) { buffer.getShort }
val boneDispName = Array.fill(buffer.get) { buffer.getString(50) }
val boneDisp = Array.fill(buffer.getInt) { new PMDBoneDisp(buffer) }
}

19. +
n IK
n
n
n JBullet: http://jbullet.advel.cz/
n
n
n
n Prolog =

20. +
n