Download e-book for iPad: 3D for iPhone Apps with Blender and SIO2: Your Guide to by Tony Mullen

By Tony Mullen

ISBN-10: 0470574925

ISBN-13: 9780470574928

When you've got ever attempted to jot down a online game with simply simple openGL ES you then understand that isn't how to improve a full-fledged iPhone 3D online game. the trail specified by this booklet is how one can cross.

The booklet starts off with an easy advent to OpenGL ES to demonstrate my aspect above. bankruptcy 2 is an advent to SIO2 programming. bankruptcy three and four discover the Blender international and combine the scene created in Blender into iPhone SDK through SIO2. by means of bankruptcy four, we now have the "World" spinning at the iPhone equipment, in 3D (a depraved twist at the vintage "Hello global" application, enjoyed it). you furthermore may get a pleasant pat at the again from the writer for making it thus far! The bankruptcy on 'Picking and textual content' is great. the remainder of the chapters does a pleasant task of completing the creation to all components of a 3D game.

There are a few blunders too within the booklet - specifically in bankruptcy three - the place we choose the sting loop - the way in which defined in bankruptcy didn't paintings for me, yet pertaining to the Appendix on Blender helped. it's also really easy to wander away in the entire intricacies of Blender and C/C++, yet with somewhat of exploring it is simple to come again heading in the right direction - patience will pay off. I want the writer had further an Appendix on complex C/C++ for the positive aspects utilized in the booklet.

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Additional resources for 3D for iPhone Apps with Blender and SIO2: Your Guide to Creating 3D Games and More with Open-Source Software

Sample text

16). 17. 16 Unwrapping the sphere in the UV/ Image Editor Hello 3D World! 17 The unwrapped mesh pattern 16. 18. 19. 20, by viewing the object using the Textured Draw Type option from the 3D Viewport header. 18 Creating a new UV texture image All graphics that you plan to use in SIO2 need to be sized according to powers of two. Images can have 64, 128, 256, 512, or 1,024 pixels per side, but images with dimensions that are not powers of two will not be rendered by OpenGL ES in the iPhone. This is an easy mistake to make, and no error will be raised at any point; your objects will simply fail to appear.

Colors on the iPhone are always expressed with four values: R, G, B, and A. Some graphical programming environments also allow colors to be represented with three values, dropping the alpha value, but not the iPhone. The elements represent the red, green, blue, and alpha values. When using unsigned char data types, as in this example, the range of values for each color channel is from 0 to 255. The fourth value, alpha, is used to represent opacity when blending is enabled, but in this example the alpha value is not used.

This information is used to determine which pixelsized image fragments are ultimately rendered. As you can see from the comment on the next line, the rendering code specific to your app will generally follow these lines: 16 { 17 18 20 22 glMatrixMode( GL_MODELVIEW ); glLoadIdentity(); glClear( GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT ); // Your rendering code here... 23 } The next function is the templateShutdown function. This is an important function, but it’s not something you will usually need to monkey with.

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3D for iPhone Apps with Blender and SIO2: Your Guide to Creating 3D Games and More with Open-Source Software by Tony Mullen


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