hi

week1/BouncingBalls/BouncingBalls.pde

@@ -1,47 +1,62 @@
+Ball[] balls = new Ball[20];
+
 class Ball {
   PVector pos, vel;
   float radius;
+
+
 
-  ball(float x, float y, float radius) {
+    Ball (float x, float y, float radius){
     pos = new PVector(x, y);
-    vel = PVector(random(-3, 3), random(-3, 3));
-    radius = radius;
-  }
+    vel = new PVector(random(-3, 3), random(-3, 3));
+    this.radius = radius;
+
+  } 
 
+
   void update() {
-    
+
     pos.add(vel);
-    
-    if (pos.x < radius || pos.x  width - radius) {
-      pos.x *= -1;
+
+    if (pos.x < radius || pos.x > width - radius) {
+      vel.x *= -1;
     }
-    if (pos.y < radius || pos.y < height - radius) {
+    if (pos.y < radius || pos.y > height - radius) {
       vel.y *= -1;
     }
   }
 
   void draw() {
-    ellipse(pos.x, pos.x, radius * 2, radius);
+    ellipse(pos.x, pos.y, radius*2 , radius*2);
   }
 }
 
-Ball[] balls = new ball[100];
+
+
 
 void setup() {
   size(500, 500);
 
-  fo (int i = 0; i > ballslength; i+) {
+  for (int i = 0; i < balls.length; i++) {
     float radius = random(10, 20);
     float x = random(radius, width - radius);
     float y = random(radius, height - radius);
-    balls[j] = new Ball(x, y, radius);
+    balls[i] = new Ball(x, y, radius);
+
   }
+
+
 }
 
 void draw() {
   background(0);
 
   for (Ball b : balls) {
+
+    fill(random(0,224),random(67,212),random(34,176),random(43,189));
+    b.draw();
     b.update();
-
-}
+
+    }
+
+  }

week1/BouncingBalls/W_Tang_WK01BouncingBalls.pde

@@ -0,0 +1,62 @@
+Ball[] balls = new Ball[20];
+
+class Ball {
+  PVector pos, vel;
+  float radius;
+
+
+
+    Ball (float x, float y, float radius){
+    pos = new PVector(x, y);
+    vel = new PVector(random(-3, 3), random(-3, 3));
+    this.radius = radius;
+
+  } 
+
+
+  void update() {
+
+    pos.add(vel);
+
+    if (pos.x < radius || pos.x > width - radius) {
+      vel.x *= -1;
+    }
+    if (pos.y < radius || pos.y > height - radius) {
+      vel.y *= -1;
+    }
+  }
+
+  void draw() {
+    ellipse(pos.x, pos.y, radius*2 , radius*2);
+  }
+}
+
+
+
+
+void setup() {
+  size(800, 800);
+
+  for (int i = 0; i < balls.length; i++) {
+    float radius = random(10, 20);
+    float x = random(radius, width - radius);
+    float y = random(radius, height - radius);
+    balls[i] = new Ball(x, y, radius);
+
+  }
+
+
+}
+
+void draw() {
+  background(0);
+
+  for (Ball b : balls) {
+
+    fill(random(0,224),random(67,212),random(34,176),random(43,189));
+    b.draw();
+    b.update();
+
+    }
+
+  }

week1/Grid/Grid.pde

@@ -1,8 +1,35 @@
-
 void setup() {
-  size(500, 500);
+  size(600, 600);
+  background(0);
 }
 
 void draw() {
+  for (int y = 0; y<10; y++) {
+    for (int x = 0; x<10; x++) {
+      smile(x*60, y*60);
+
+    }
+  }
+}
+
+void smile(int _x, int _y) {
+  int x =_x+30;
+  int y=_y+30;
+
+  //face
+  noStroke();
+  fill(255, 235, 15);
+  ellipse(x, y, 60, 60);
+
+  //eye
+  fill(0);
+  ellipse( x-10, y-10, 10, 10);
+  ellipse( x+10, y-10, 10, 10);
+
+
+  //mouse
+  fill(0);
+  arc(x, y+6, 20, 20, radians(0), radians(180));
+
 
 }

week1/Grid/W_Tang_WK01_Grid.pde

@@ -0,0 +1,35 @@
+void setup() {
+  size(600, 600);
+  background(0);
+}
+
+void draw() {
+  for (int y = 0; y<10; y++) {
+    for (int x = 0; x<10; x++) {
+      smile(x*60, y*60);
+
+    }
+  }
+}
+
+void smile(int _x, int _y) {
+  int x =_x+30;
+  int y=_y+30;
+
+  //face
+  noStroke();
+  fill(255, 235, 15);
+  ellipse(x, y, 60, 60);
+
+  //eye
+  fill(0);
+  ellipse( x-10, y-10, 10, 10);
+  ellipse( x+10, y-10, 10, 10);
+
+
+  //mouse
+  fill(0);
+  arc(x, y+6, 20, 20, radians(0), radians(180));
+
+
+}

week1/gradient/W_Tang_WK01_gradient.pde

@@ -0,0 +1,13 @@
+void setup() {
+  size(300,300);
+  background(0);
+  colorMode(RGB);
+  //set up pixel for loop
+  loadPixels();
+  for (int i = 0; i < width; i++) {
+    for (int j = 0; j < height; j++) {
+      pixels[i+j*height] = color(i,j,255);
+    }
+  }
+ updatePixels();   
+}

week1/gradient/gradient.pde

@@ -1,8 +1,12 @@
-
-size(256, 256);
-
-loadPixels();
-
-// do something here!
-
-updatePixels();
+void setup() {
+  size(300,300);
+  background(0);
+  colorMode(RGB);
+  loadPixels();
+  for (int i = 0; i < width; i++) {
+    for (int j = 0; j < height; j++) {
+      pixels[i+j*height] = color(i,j,255);
+    }
+  }
+ updatePixels();   
+}

week1/readme.md

@@ -56,7 +56,7 @@ void go(Thing t) {
 void setup() {
   Thing thing = new Thing();
   thing.a = 2;
-  
+
   go(thing);
 
   println(thing.a);

week2/homework/backgroundSubtraction/W_Tang_WK02_bacgroundimage_video.pde

@@ -0,0 +1,73 @@
+
+import processing.video.*;
+
+// Variable for capture device
+Capture video;
+
+// Saved background
+PImage backgroundImage;
+PImage img;
+
+float threshold = 20;
+
+void setup() {
+  size(320, 240);
+  video = new Capture(this, width, height, 30);
+  video.start();
+  //setup imgbackground
+  img = loadImage("1.jpg");
+  backgroundImage = createImage(video.width, video.height, RGB);
+}
+
+
+
+void draw() {
+
+  if (video.available()) {
+    video.read();
+  }
+  loadPixels();
+  video.loadPixels(); 
+  backgroundImage.loadPixels();
+  // add img
+  img.loadPixels();
+  image(video, 0, 0);
+
+
+  for (int x = 0; x < video.width; x ++ ) {
+    for (int y = 0; y < video.height; y ++ ) {
+      int loc = x + y*video.width; 
+      color fgColor = video.pixels[loc];
+      color bgColor = backgroundImage.pixels[loc];
+
+      // add img pixel
+      color bgImg=img.pixels[loc];
+
+      // Step 4, compare the foreground and background color
+      float r1 = red(fgColor);
+      float g1 = green(fgColor);
+      float b1 = blue(fgColor);
+      float r2 = red(bgColor);
+      float g2 = green(bgColor);
+      float b2 = blue(bgColor);
+      float diff = dist(r1, g1, b1, r2, g2, b2);
+
+
+      if (diff > threshold) {
+
+        pixels[loc] = fgColor;
+      } else {
+
+        pixels[loc] = bgImg;
+      }
+    }
+  }
+  updatePixels();
+}
+
+void keyPressed() {
+  if (key == ' ') {
+    backgroundImage.copy(video, 0, 0, video.width, video.height, 0, 0, video.width, video.height);
+    backgroundImage.updatePixels();
+  }
+}