許君平 1229 上課筆記

2016/12/29

1.3D掃描

*Voxxlr

http://www.voxxlr.com/

*Project Tango Test in my Room

https://www.youtube.com/watch?v=PMou8eIRzMk

*kinectfusion

https://www.youtube.com/watch?v=quGhaggn3cQ

*深度攝影機ToF Camera Noise of Kinect for Windows Ver.2.0

https://www.youtube.com/watch?v=CKuAqnwEjgM

*Q: 那戶外大型建築怎麼掃描?
A: 義大利有許多大型的雕像,可能5-10公尺高, "數位米開朗基羅計畫" 由跨國的團隊,把大型的雕像掃描起來。

https://graphics.stanford.edu/projects/mich/more-david/more-david.html

2.processing實作
*binvox
http://www.patrickmin.com/binvox/

int xRes,yRes,zRes, bunny[][][], inside[][][], millis0;

float angleX=0, angleY=0, myScale=1;

void setup(){

  size(600,400,P3D);

  byte b[]=loadBytes("bunny40.mira");//("bunny80.mira");

  xRes=((b[8] &0x00FF)<<8)+(b[9] &0x00FF);

  yRes=((b[10]&0x00FF)<<8)+(b[11]&0x00FF);

  zRes=((b[12]&0x00FF)<<8)+(b[13]&0x00FF);

  myScale=0.3*width/float(xRes);

  bunny=new int[xRes][yRes][zRes]; inside=new int[xRes][yRes][zRes];

  for(int i=0;i<xRes*yRes*zRes;i++){

    int x=int(i/(yRes*zRes)), y=int(i/zRes)%yRes, z=i%zRes;

    bunny[x][y][z]=b[256+(xRes+yRes+zRes)*8+i];

  }

  for(int i=1;i<xRes-1;i++)

    for(int j=1;j<yRes-1;j++)

      for(int k=1;k<zRes-1;k++)

        if(bunny[i-1][j][k]!=0 && bunny[i+1][j][k]!=0 && bunny[i][j-1][k]!=0 && bunny[i][j+1][k]!=0

            && bunny[i][j][k-1]!=0 && bunny[i][j][k+1]!=0) inside[i][j][k]=1;

}

void draw(){

  println("fps: "+frameRate);

  background(128); noStroke();

  pointLight(128,255,128, width, height, height);

  directionalLight(30,30,30, 0,0,-1);

  directionalLight(40,40,40, 0,1,-1); 

  translate(width/2,height/2,0);

  rotateX(-angleY);

  rotateY(angleX);

  rotateX(PI/2);

  scale(myScale);

  translate(-xRes,-yRes,-zRes);

  for(int i=0;i<xRes;i++){

    for(int j=0;j<yRes;j++){

      for(int k=0;k<zRes;k++){

        if(bunny[i][j][k]!=0 && inside[i][j][k]==0){

          pushMatrix();

          translate(2*i,2*j,2*k);

          box(2);

          popMatrix();

        }

      }

    }

  }

}

void mouseDragged(){

  angleX+=0.01*(mouseX-pmouseX);

  angleY+=0.01*(mouseY-pmouseY);

}

*火箭範例

*實作1

*實作2-加旋轉、打光

*可以隨著滑鼠旋轉

PShape bunny;

void setup(){

  size(400,400,P3D);

  bunny = loadShape("rocket.obj");

}

void draw(){

  background(255,0,0);

  lights();

  translate(width/2,height/2);

  rotateX(radians(mouseY));

  rotateY(radians(mouseX));

  shape(bunny,0,0);

}