heavily simplified brightness example

benfry · benfry · commit 87ed8c5cc8e5 · 2010-02-28T19:10:36.000Z
diff --git a/content/examples/Basics/Color/Brightness/Brightness.pde b/content/examples/Basics/Color/Brightness/Brightness.pde
@@ -4,28 +4,26 @@
  * 
  * Brightness is the relative lightness or darkness of a color.
  * Move the cursor vertically over each bar to alter its brightness. 
+ * 
+ * Updated 28 February 2010.
  */
  
 int barWidth = 5;
-int[] brightness;
+int lastBar = -1;
 
-void setup() 
-{
+void setup() {
   size(200, 200);
-  colorMode(HSB, 360, height, height);  
-  brightness = new int[width/barWidth];
+  colorMode(HSB, 360, 100, height);
+  noStroke();
+  background(0);
 }
 
-void draw() 
-{
-  int j = 0;
-  for (int i = 0; i <= (width-barWidth); i += barWidth) {  
-    noStroke();
-    if ((mouseX > i) && (mouseX < i+barWidth)) {
-      brightness[j] = mouseY;
-    }
-    fill(i, height, brightness[j]);
-    rect(i, 0, barWidth, height);  
-    j++;
+void draw() {
+  int whichBar = mouseX / barWidth;
+  if (whichBar != lastBar) {
+    int barX = whichBar * barWidth;
+    fill(barX, 100, mouseY);
+    rect(barX, 0, barWidth, height);
+    lastBar = whichBar;
   }
 }
