第四周作業

今天目標: 碰撞偵測

0. 先把上課要用的環境設定好
0.1. LeapMotion裝起來 (Software, Leap Developer Kit)
0.2. Processing 2.1.1 新版裝起來
0.3. 用新版 Processing 來 Import Library 安裝三個library (search: colli
0.3.0. Leap Motion for Processing
0.3.1. bRigid  (它另外需要 PeasyCam)
0.3.2. ComputationalGeometry
0.3.3. SuperCollider

1. 試著開啟 Examples 裡的 Leap Motion for Processing 的 e1_basic, 將很多行的程式碼,簡化成3個重點
1.1. import 並宣告
import de.voidplus.leapmotion.*;
LeapMotion lea;
1.2. 在 setup()裡面 new 好它
leap = new LeapMotion(this);
1.3. 在 draw()裡面用它
for( Hand hand : leap.getHands() ){
  hand.draw();
}

2. 試著跑 bRigid 的範例 terrain

3. 試著將  Leap Motion 結合到 Terrain 範例中

手一揮Leap motion就有東西掉下來

import javax.vecmath.Vector3f;

import processing.core.PApplet;

import peasy.*;

import bRigid.*;

import de.voidplus.leapmotion.*;

LeapMotion leap;

PeasyCam cam;

BPhysics physics;

BObject rigid;

BTerrain terrain;

public void setup() {

  size(1280, 720, P3D);

  frameRate(60);

  cam = new PeasyCam(this, 200);

  cam.pan(0, 50);

  cam.rotateX(.4f);

  physics = new BPhysics();

  physics.world.setGravity(new Vector3f(0, 40, 0));

  float height = 1.1f;

  //BTerrain(PApplet p, int tesselation, float height, int seed, Vector3f position, Vector3f scale) 

  terrain = new BTerrain(this, 110, height, 10, new Vector3f(), new Vector3f(2, 2, 2));

  physics.addBody(terrain);

  //create the first rigidBody as Sphere

  rigid = new BBox(this, 5, 1.0f, 10.0f, 1.0f);

  leap = new LeapMotion(this);

}

public void draw() {

  background(255);

  lights();

  rotateY(frameCount*.002f);

for (Hand hand : leap.getHands()) {

   PVector h  = hand.getPosition();

    if (frameCount%2==0) {

      Vector3f pos = new Vector3f(h.x / 10 -90 , -30, h.z -50);

      //reuse the rigidBody of the sphere for performance resons

      BObject r = new BObject(this, 5, rigid, pos, true);

      physics.addBody(r);

    }

}

  physics.update();

  terrain.display();

  for (int i =1;i<physics.rigidBodies.size();i++) {

    BObject b = (BObject) physics.rigidBodies.get(i);

    b.display(50, 50, 50);

  }

}

4. 什麼? 有同學上課在玩 Maya 建模? 那我們把 Maya 建出來的車子也匯出來, 在 Processing 中試著畫 3D模型吧!
4.1. Processing Import Library, OBJLoader
4.2. 跑 Example, 裡面 OBJLoader 有 OBJLoader_BoundingBox 範例可以跑
4.3. 把你的模型,放在 文件\Processing\libraries\OBJLoader\examples\OBJLoader_BoundingBox\data 中, 然後範例程式裡面的 model = new OBJLoader(.... "檔名.obj" ...) 改成你的檔名即可