java/examples/Basics/Image/Sprite/applet/Sprite.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 Sprite extends PApplet {
+
+/**
+ * Sprite (Teddy)
+ * by James Patterson. 
+ * 
+ * Demonstrates loading and displaying a transparent GIF image. 
+ */
+ 
+PImage teddy;
+
+float xpos;
+float ypos;
+float drag = 30.0f;
+
+public void setup() 
+{
+  size(200,200);
+  teddy = loadImage("teddy.gif");
+  xpos = width/2;
+  ypos = height/2;
+  frameRate(60);
+}
+
+public void draw() 
+{ 
+  background(102);
+  
+  float difx = mouseX - xpos-teddy.width/2;
+  if(abs(difx) > 1.0f) {
+    xpos = xpos + difx/drag;
+    xpos = constrain(xpos, 0, width-teddy.width);
+  }  
+  
+  float dify = mouseY - ypos-teddy.height/2;
+  if(abs(dify) > 1.0f) {
+    ypos = ypos + dify/drag;
+    ypos = constrain(ypos, 0, height-teddy.height);
+  }  
+  
+  // Display the sprite at the position xpos, ypos
+  image(teddy, xpos, ypos);
+}
+
+  static public void main(String args[]) {
+    PApplet.main(new String[] { "Sprite" });
+  }
+}