The last kind of conversion you will learn about in this chapter con­verts a rotation angle and axis to a quaternion. You’ll need to do this because most graphics APIs cannot use a quaternion to directly repre­sent a rotation, so… читать далее

A s the book moves forward into this chapter, more advanced formats start appearing. This is the first of several more compli­cated formats. Gone are the days of simple “load-and-cycle” formats such as the famous MD2 format discussed earlier in… читать далее

One of the most important uses for matrices in game programming is for transformations. Transformation matrices are used to position geometry and other objects onscreen. There are five main transformation matrices that you will use when working with 3D models.… читать далее

The model shown in Figure 3.4 would look a lot better if you added a texture. This can be done in one of two ways. The first way is to use the skin names embedded inside the MD2 file itself.… читать далее

A s you explore the wide world of three-dimensional graphics, you will journey past vectors and matrices into the land of the quater­nion. You may have heard this word thrown around before, but you may not know what it means.… читать далее

Skeletal animation has many advantages over the traditional vertex animation, which you saw in earlier chapters. The first, and most visible to the game’s players is increased realism. Skeletally animated characters tend to move much more realistically, and often appear… читать далее

A s you surf the Internet, learning how to make the next big 3D game, you inevitably come across references to “matrices” and “vectors”. If you have not had the pleasure of taking any math courses beyond high school, you… читать далее

Now, after all that, you get to learn about the coolest thing in quater­nions: interpolation. Interpolation is very important when working with 3D models. Imagine that you are working on a game that includes enemies who patrol an area, back… читать далее

A s I browse various Internet forums, read mailing lists, and even just talk to various people about 3D models, this format seems to come up a lot. The questions “How do I load 3ds models?” and “How do I… читать далее

You know all about matrices now, so you can move on to the second concept, vectors. Vectors are one-dimensional arrays of numbers. In 3D graphics and games, most vectors have two, three, or even four compo­nents, one for each axis,… читать далее