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As you can see, we ve added a WHERE clause on the CustomerOrder.ordered_on column. Most readers will arrive at the conclusion that the results of the SQL in Listing 7-12 should still have five rows in it, because the LEFT JOIN should include all the OrderStatus rows, along with a count of the orders in each status placed on December 7, 2004. If you arrived at this conclusion, you would, unfortunately, be mistaken, but don t be discouraged. The behavior demonstrated in this example is one of the most common mistakes involving outer joins. The actual result returned is shown in Listing 7-13. Listing 7-13. Result from SQL in Listing 7-12 +-------------+-----------+ | description | NumOrders | +-------------+-----------+ | Completed | 1 | +-------------+-----------+ 1 row in set (0.00 sec)

As the triangles are drawn sequentially, the indexes are actually just an increasing sequence of numbers: the first triangle is formed from vertices 0, 1 and 2, the second triangle from vertices 3, 4 and 5, etc..

TextureIO supports a wide variety of image types, including GIF, JPEG, and PNG. TextureIO.newTexture() returns a Texture object, an instance of another JOGL utility class. Texture offers a convenient way of setting/getting texture parameters, binding the texture, and computing texture coordinates. All the textures use the fast resizing option, GL.GL_NEAREST, when they re magnified or minified. In addition, the stars texture used in the skybox is set to repeat when pasted onto a large surface. Several of the images have transparent backgrounds, but no special settings are needed to load them. Texture mapping isn t switched on in these methods; instead it s enabled as needed inside the methods for rendering the skybox, billboard, sphere, the ground shapes, and Game Over message.

Visio One of the most popular diagramming tools on the market, Microsoft Visio (http:// www.microsoft.com/office/visio/) comes in two flavors, Standard and Professional. Now part of the Microsoft Office family, Visio can be relatively easy to learn, as it uses the same look and feel as many other Office programs, as shown in Figure 1-5.

// First create the array with an element for each vertex indices = new short[vertices.Length]; // Then set the elements within the array so that each contains // the next sequential vertex index for (i = 0; i < indices.Length; i++) { indices[i] = i; } // Finally delegate to the other overload to do the work CalculateVertexNormals(vertices, indices); }

OpenGL s lighting model supports multiple light sources, which may have ambient, diffuse, specular, or emissive components, in much the same way as Java 3D. Lighting interacts with the material settings for objects, which specify the color reflected when the object is exposed to ambient, diffuse, or specular light. Materials can also emit light, and have a shininess value. addLight() only deals with light properties; material properties are set when an object is being rendered: private void addLight() { // enable a single light source gl.glEnable(GL.GL_LIGHTING); gl.glEnable(GL.GL_LIGHT0); float[] grayLight = {0.1f, 0.1f, 0.1f, 1.0f}; // weak gray ambient gl.glLightfv(GL.GL_LIGHT0, GL.GL_AMBIENT, grayLight, 0); float[] whiteLight = {1.0f, 1.0f, 1.0f, 1.0f}; // bright white diffuse & specular gl.glLightfv(GL.GL_LIGHT0, GL.GL_DIFFUSE, whiteLight, 0); gl.glLightfv(GL.GL_LIGHT0, GL.GL_SPECULAR, whiteLight, 0); float lightPos[] = {1.0f, 1.0f, 1.0f, 0.0f}; // top right front direction gl.glLightfv(GL.GL_LIGHT0, GL.GL_POSITION, lightPos, 0); } // end of addLight() The scene uses a single source, GL.GL_LIGHT0, producing a grayish ambient light, with white diffuse and specular components. White is the default color for LIGHT0 s diffuse and specular elements, so the second and third GL.glLightfv() calls aren t necessary, but I ve left them in as examples. The final GL.glLightfv() call sets the light s position; the 0 argument specifies that lightPos defines a vector passing through the origin. The light becomes directional, corresponding to rays hitting all parts of the scene with the same vector (e.g., somewhat like sun rays hitting the earth). The (1, 1, 1) vector creates parallel light coming from the front top-right of the scene.

Figure 1-5. Visio 2002 To do serious UML modeling, you should install a UML 2.0 stencil, which has the modeling shapes in a handy template, enabling you to drag-and-drop class objects and relation connectors onto the drawing board the same way most other modeling programs do.