java/examples/Basics/Form/SimpleCurves/applet/SimpleCurves.java

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+import processing.core.*; 
+
+import java.applet.*; 
+import java.awt.*; 
+import java.awt.image.*; 
+import java.awt.event.*; 
+import java.io.*; 
+import java.net.*; 
+import java.text.*; 
+import java.util.*; 
+import java.util.zip.*; 
+import java.util.regex.*; 
+
+public class SimpleCurves extends PApplet {
+
+/**
+ * Simple Curves. 
+ * 
+ * Simple curves are drawn with simple equations. 
+ * By using numbers with values between 0 and 1 in
+ * the equations, a series of elegant curves
+ * are created. The numbers are then scaled to fill the screen. 
+ */
+
+public void setup() {
+  size(200, 200);
+  colorMode(RGB, 100);
+  background(0);
+  noFill();
+  noLoop();
+}
+
+public void draw() {
+  stroke(40);
+  beginShape();
+  for(int i=0; i<width; i++) {
+   vertex(i, singraph((float)i/width)*height);
+  }
+  endShape();
+  
+  stroke(55);
+  beginShape();
+  for(int i=0; i<width; i++) {
+   vertex(i, quad((float)i/width)*height);
+  }
+  endShape();
+  
+  stroke(70);
+  beginShape();
+  for(int i=0; i<width; i++) {
+   vertex(i, quadHump((float)i/width)*height);
+  }
+  endShape();
+  
+  stroke(85);
+  beginShape();
+  for(int i=0; i<width; i++) {
+   vertex(i, hump((float)i/width)*height);
+  }
+  endShape();
+  
+  stroke(100);
+  beginShape();
+  for(int i=0; i<width; i++) {
+   vertex(i, squared((float)i/width)*height);
+  }
+  endShape();
+}
+
+public float singraph(float sa) {
+  sa = (sa - 0.5f) * 1.0f; //scale from -1 to 1
+  sa = sin(sa*PI)/2 + 0.5f;
+  return sa;
+}
+
+public float quad(float sa) {
+  return sa*sa*sa*sa;
+}
+
+public float quadHump(float sa) {
+  sa = (sa - 0.5f); //scale from -2 to 2
+  sa = sa*sa*sa*sa * 16;
+  return sa;
+}
+
+public float hump(float sa) {
+  sa = (sa - 0.5f) * 2; //scale from -2 to 2
+  sa = sa*sa;
+  if(sa > 1) { sa = 1; }
+  return 1-sa;
+}
+
+public float squared(float sa) {
+  sa = sa*sa;
+  return sa;
+}
+
+  static public void main(String args[]) {
+    PApplet.main(new String[] { "SimpleCurves" });
+  }
+}