moving the OpenGL examples to the core

java/examples/OpenGL/Image/Zoom/Zoom.pde

@@ -0,0 +1,89 @@
+/**
+ * Zoom. 
+ * 
+ * Move the cursor over the image to alter its position. Click and press
+ * the mouse to zoom and set the density of the matrix by typing numbers 1-5.
+ * This program displays a series of lines with their heights corresponding to 
+ * a color value read from an image. 
+ */
+
+PImage img;
+//boolean onetime = true;
+int[][] imgPixels;
+float sval = 1.0;
+float nmx, nmy;
+int res = 5;
+
+void setup() 
+{
+  size(640, 360, P3D);
+  noFill();
+  stroke(255);
+  img = loadImage("ystone08.jpg");
+  imgPixels = new int[img.width][img.height];
+  for (int i = 0; i < img.height; i++) {
+    for (int j = 0; j < img.width; j++) {
+      imgPixels[j][i] = img.get(j, i);
+    }
+  }
+}
+
+void draw() 
+{
+  background(0);
+
+  nmx = nmx + (mouseX-nmx)/20; 
+  nmy += (mouseY-nmy)/20; 
+
+  if(mousePressed) { 
+    sval += 0.005; 
+  } 
+  else {
+    sval -= 0.01; 
+  }
+
+  sval = constrain(sval, 1.0, 2.5);
+
+  translate(width/2 + nmx * sval-100, height/2 + nmy*sval - 200, -50);
+  scale(sval);
+  rotateZ(PI/9 - sval + 1.0);
+  rotateX(PI/sval/8 - 0.125);
+  rotateY(sval/8 - 0.125);
+
+  translate(-width/2, -height/2, 0);
+
+  for (int i = 0; i < img.height; i += res) {
+    for (int j = 0; j < img.width; j += res) {
+      float rr = red(imgPixels[j][i]); 
+      float gg = green(imgPixels[j][i]);
+      float bb = blue(imgPixels[j][i]);
+      float tt = rr+gg+bb;
+      stroke(rr, gg, gg);
+      line(i, j, tt/10-20, i, j, tt/10 );
+    }
+  }
+}
+
+void keyPressed() {
+  if(key == '1') {
+    res = 1;
+  } 
+  else if (key == '2') {
+    res = 2; 
+  } 
+  else if (key == '3') {
+    res = 3;
+  } 
+  else if (key == '4') {
+    res = 4;
+  } 
+  else if (key == '5') {
+    res = 5;
+  }
+}
+
+
+
+
+
+