Examples mods for 2.0

2026-06-16 04:26:26 +02:00 · 2011-09-16 05:00:28 +00:00
parent c3b8b312a0
commit 472fd13b2f
20 changed files with 210 additions and 241 deletions
@@ -5,35 +5,48 @@
 * by processing it through a high-pass filter. 
 */

-float[][] kernel = { { -1, -1, -1 },
-                     { -1,  9, -1 },
-                     { -1, -1, -1 } };
-  
-size(200, 200);
-PImage img = loadImage("house.jpg"); // Load the original image
-image(img, 0, 0); // Displays the image from point (0,0) 
-img.loadPixels();
-// Create an opaque image of the same size as the original
-PImage edgeImg = createImage(img.width, img.height, RGB);
-// Loop through every pixel in the image.
-for (int y = 1; y < img.height-1; y++) { // Skip top and bottom edges
-  for (int x = 1; x < img.width-1; x++) { // Skip left and right edges
-    float sum = 0; // Kernel sum for this pixel
-    for (int ky = -1; ky <= 1; ky++) {
-      for (int kx = -1; kx <= 1; kx++) {
-        // Calculate the adjacent pixel for this kernel point
-        int pos = (y + ky)*img.width + (x + kx);
-        // Image is grayscale, red/green/blue are identical
-        float val = red(img.pixels[pos]);
-        // Multiply adjacent pixels based on the kernel values
-        sum += kernel[ky+1][kx+1] * val;
-      }
-    }
-    // For this pixel in the new image, set the gray value
-    // based on the sum from the kernel
-    edgeImg.pixels[y*img.width + x] = color(sum);
-  }
+// @pjs preload must be used to preload media if the program is 
+// running with Processing.js
+/* @pjs preload="house.jpg"; */
+
+float[][] kernel = {{ -1, -1, -1}, 
+                    { -1,  9, -1}, 
+                    { -1, -1, -1}};
+                    
+PImage img;
+
+void setup() { 
+  size(200, 200);
+  img = loadImage("house.jpg"); // Load the original image
+  noLoop();
 }
-// State that there are changes to edgeImg.pixels[]
-edgeImg.updatePixels();
-image(edgeImg, 100, 0); // Draw the new image
+
+void draw() {
+  image(img, 0, 0); // Displays the image from point (0,0) 
+  img.loadPixels();
+  // Create an opaque image of the same size as the original
+  PImage edgeImg = createImage(img.width, img.height, RGB);
+  // Loop through every pixel in the image.
+  for (int y = 1; y < img.height-1; y++) { // Skip top and bottom edges
+    for (int x = 1; x < img.width-1; x++) { // Skip left and right edges
+      float sum = 0; // Kernel sum for this pixel
+      for (int ky = -1; ky <= 1; ky++) {
+        for (int kx = -1; kx <= 1; kx++) {
+          // Calculate the adjacent pixel for this kernel point
+          int pos = (y + ky)*img.width + (x + kx);
+          // Image is grayscale, red/green/blue are identical
+          float val = red(img.pixels[pos]);
+          // Multiply adjacent pixels based on the kernel values
+          sum += kernel[ky+1][kx+1] * val;
+        }
+      }
+      // For this pixel in the new image, set the gray value
+      // based on the sum from the kernel
+      edgeImg.pixels[y*img.width + x] = color(sum);
+    }
+  }
+  // State that there are changes to edgeImg.pixels[]
+  edgeImg.updatePixels();
+  image(edgeImg, 100, 0); // Draw the new image
+}
+