java/examples/3D/Camera/OrthoVSPerspective/OrthoVSPerspective.pde

@@ -0,0 +1,42 @@
+/** 
+ * Ortho vs Perspective. 
+ * 
+ * Click to see the difference between orthographic projection
+ * and perspective projection as applied to a simple box.
+ * The ortho() function sets an orthographic projection and 
+ * defines a parallel clipping volume. All objects with the 
+ * same dimension appear the same size, regardless of whether 
+ * they are near or far from the camera. The parameters to this 
+ * function specify the clipping volume where left and right 
+ * are the minimum and maximum x values, top and bottom are the 
+ * minimum and maximum y values, and near and far are the minimum 
+ * and maximum z values.
+ */
+
+void setup() 
+{
+  size(640, 360, P3D);
+  noStroke();
+  fill(204);
+}
+
+void draw() 
+{
+  background(0);
+  lights();
+ 
+  if(mousePressed) {
+    float fov = PI/3.0; 
+    float cameraZ = (height/2.0) / tan(PI * fov / 360.0); 
+    perspective(fov, float(width)/float(height), 
+                cameraZ/2.0, cameraZ*2.0); 
+  } else {
+    ortho(-width/2, width/2, -height/2, height/2, -10, 10); 
+  }
+  
+  translate(width/2, height/2, 0);
+  rotateX(-PI/6); 
+  rotateY(PI/3); 
+  box(160); 
+}
+

java/examples/3D/Camera/OrthoVSPerspective/applet/OrthoVSPerspective.java

@@ -0,0 +1,62 @@
+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 OrthoVSPerspective extends PApplet {
+
+/** 
+ * Ortho vs Perspective. 
+ * 
+ * Click to see the difference between orthographic projection
+ * and perspective projection as applied to a simple box.
+ * The ortho() function sets an orthographic projection and 
+ * defines a parallel clipping volume. All objects with the 
+ * same dimension appear the same size, regardless of whether 
+ * they are near or far from the camera. The parameters to this 
+ * function specify the clipping volume where left and right 
+ * are the minimum and maximum x values, top and bottom are the 
+ * minimum and maximum y values, and near and far are the minimum 
+ * and maximum z values.
+ */
+
+public void setup() 
+{
+  size(640, 360, P3D);
+  noStroke();
+  fill(204);
+}
+
+public void draw() 
+{
+  background(0);
+  lights();
+ 
+  if(mousePressed) {
+    float fov = PI/3.0f; 
+    float cameraZ = (height/2.0f) / tan(PI * fov / 360.0f); 
+    perspective(fov, PApplet.parseFloat(width)/PApplet.parseFloat(height), 
+                cameraZ/2.0f, cameraZ*2.0f); 
+  } else {
+    ortho(-width/2, width/2, -height/2, height/2, -10, 10); 
+  }
+  
+  translate(width/2, height/2, 0);
+  rotateX(-PI/6); 
+  rotateY(PI/3); 
+  box(160); 
+}
+
+
+  static public void main(String args[]) {
+    PApplet.main(new String[] { "OrthoVSPerspective" });
+  }
+}

java/examples/3D/Camera/OrthoVSPerspective/applet/OrthoVSPerspective.pde

@@ -0,0 +1,42 @@
+/** 
+ * Ortho vs Perspective. 
+ * 
+ * Click to see the difference between orthographic projection
+ * and perspective projection as applied to a simple box.
+ * The ortho() function sets an orthographic projection and 
+ * defines a parallel clipping volume. All objects with the 
+ * same dimension appear the same size, regardless of whether 
+ * they are near or far from the camera. The parameters to this 
+ * function specify the clipping volume where left and right 
+ * are the minimum and maximum x values, top and bottom are the 
+ * minimum and maximum y values, and near and far are the minimum 
+ * and maximum z values.
+ */
+
+void setup() 
+{
+  size(640, 360, P3D);
+  noStroke();
+  fill(204);
+}
+
+void draw() 
+{
+  background(0);
+  lights();
+ 
+  if(mousePressed) {
+    float fov = PI/3.0; 
+    float cameraZ = (height/2.0) / tan(PI * fov / 360.0); 
+    perspective(fov, float(width)/float(height), 
+                cameraZ/2.0, cameraZ*2.0); 
+  } else {
+    ortho(-width/2, width/2, -height/2, height/2, -10, 10); 
+  }
+  
+  translate(width/2, height/2, 0);
+  rotateX(-PI/6); 
+  rotateY(PI/3); 
+  box(160); 
+}
+