Focus On 3D Terrain Programming phần 5 ppt

... of terrain. The driving concept of geomipmapping is that you have a set patch of terrain. For this expla- nation, I’ll say it’s a patch with a size of 5 vertices (a 5 × 5 patch). That 5 × 5 patch ... imple- mentation. Check out demo5_1 (on the CD under Code\Chapter 5\ demo5_1) and look at a sample screenshot from that demo in Figure 5. 17. It shows the textured/detail-mapped im...

Ngày tải lên: 12/08/2014, 17:20

... enter the hardcore terrain programming section, which contains all sorts of information on advanced terrain algorithms. References 1 Van Noland, Charlie. “Slope Lighting Terrain. ” 2002. http://www.gamedev.net/reference/articles/article1436.asp. 72 4. ... lightmap onto terrain, but the more advanced lightmapping concepts concentrate on the genera- tion of a lightmap. (I’ll be show...

Ngày tải lên: 12/08/2014, 17:20

... terrain mesh (for example purposes, we’ll choose a heightmap resolution of 256 × 256 ), (0,0) would have texture coordinates of (0.0f, 0.0f), and the upper-left corner of the terrain ( 255 , 255 ), ... Shankel, Jason. “Fractal Terrain Generation—Fault Formation.” Game Programming Gems. Rockland, Massachusetts: Charles River Media, 2000. 499 50 2. 2 Shankel, Jason. “Fractal Terrain...

Ngày tải lên: 12/08/2014, 17:20

... theory. Let’s move on to the next section. Propagation Propaganda This theory section is about how to improve the tessellation of your quadtree implementation. In the previous section, we talked about general ... of 0– 255 . (That is the maximum precision that an unsigned char can get. I don’t know about you, but I don’t feel like spending more memory on making a quadtree matrix of highe...

Ngày tải lên: 12/08/2014, 17:20

... implementation, the update/shutdown functions are going to be almost laughably small, consisting of one line each. To stay consistent with previous chapters, let’s start with the initialization function ... ended up with a fast, flexible, and good-looking terrain implementation! We have only one more terrain algorithm to cover, so let’s get to it! 1 25 Summary ROAM 2.0 Yes, that’s right:...

Ngày tải lên: 12/08/2014, 17:20

... allocation/freeing functions are the high- level abstractions that call on the add/remove triangle functions. Let’s focus on the low-level manipulation functions because the high-level ones are ... diamond information and use the vertices contained in the diamond (the diamond’s center vertex and the center vertices of its previous and next diamond links). The high- level rendering funct...

Ngày tải lên: 12/08/2014, 17:20

... texture! Check out demo8 _5 on the CD (under Code\Chapter 8\demo8 _5) and Figure 8.19 to see a screenshot from that demo. Camera -Terrain Collision Detection and Simple Response Do not let the heading ... an interpolation bias. This function is called CosineInterpolation, and we’ll use it in conjunction with the RangedSmoothRandom function to form the basis of our noise generation. Now f...

Ngày tải lên: 12/08/2014, 17:20

... maps defined, 52 hardware multitexturing, 54 55 ROAM algorithm, 147–148 diamond pool buffer, ROAM algorithm, 153 – 154 diamonds base unit, 149 creation function, 151 – 153 Enqueue function, 158 merge function, ... functions, 160 Allocation function, 160 backbone data structure, 149– 156 binary triangle tree, 129–132 detail mapping, 147–148 diamond creation function, 151 – 153 diamon...

Ngày tải lên: 12/08/2014, 17:20

... Trong hộp thoại Render Output File vừa hiển thị, đặt tên cho cảnh phim này là animlife.avi. Nhấp Save để lưu phim vào thư mục con images. Hộp thoại Video Compression hiển thị, trong hộp ... nhỏ bằng một phần tư kích thước mặc định, điều này sẽ làm cho việc render trở nên nhanh hơn. Trong vùng Time Output của hộp thoại này, nhấp chuột bật Active Time Segment. Trong vùng Render...

Ngày tải lên: 12/12/2013, 21:15

... functions to do the conversions: day_of_year converts the month and day into the day of the year, and month_day converts the day of the year into the month and day. Since this latter function computes ... declarations for the functions mentioned in this section, plusavarietyofotherstring-handlingfunctionsfromthestandardlibrary. Exercise 5- 3. Write a pointer version of the functio...

Ngày tải lên: 06/08/2014, 09:20