Hall of Fame

1. ikework47,945
2. JoseParrot14,924
3. bham3dman12,000
4. ozo11,440
5. jgordos10,200
6. Interactive...6,600
7. Xcone6,250
8. pepsichris4,000
9. objects3,250
10. satsumo3,000
11. Rh1no2,672
12. NovaDeni...2,368
13. Melange2,000
13. abel2,000
13. yuk992,000
13. rascalpants2,000
13. oobayly2,000
13. Infinity082,000
13. Barthax2,000
13. jamietoner2,000
13. StormSeed2,000
13. darkphotn2,000
13. viju20082,000
13. RPCIT2,000
13. discipline...2,000
13. Christoph...2,000
13. whatisittel...2,000
13. h2g2guy2,000

1. ikework131,649
2. ozo80,051
3. JoseParrot77,371
4. davebytes50,840
5. sunnycoder41,305
6. Interactive...31,500
7. jgordos29,000
8. bham3dman20,000
9. Infinity0818,270
10. NovaDeni...15,368
11. joachimc13,400
12. cybermike3d13,014
13. fl0yd12,581
14. thegilb8,122
15. MASQUE...7,000
15. enkimute7,000
17. Xcone6,250
18. TGGC5,280
19. info_exp...5,250
20. SturmNacht5,105
21. bcladd5,080
22. evilrix4,656
23. nils pipen...4,650
24. shirsoft4,648
25. jkr4,600

	[x] Posted via EE Mobile
	Search, ask, and monitor your questions on the go with EE Mobile. Visit Experts Exchange from your mobile device and never be out of touch again.

Question

	[x] Attachment Details

[x]

The Solution Rating System

With so many solutions, how can you tell which solutions are most likely to help you and which ones are not? To provide you with a tool to use, we rate our solutions based on various elements that most accurately determine if a solution is a quality solution. To explain what factors affect the solution rating, here are the elements we take into consideration when formulating our solution rating.

The Grade of the Solution
The Zone Rank of the Expert Providing the Solution
The Number of Author and Expert Comments
The Number of Experts Contributing
The Feedback of the Community

Your Input Matters
Because of the way the system is set up, the most important variable in this equation is you. As a member of Experts Exchange, you are able to cast your vote on the quality of the solutions in regard to how complete, accurate, helpful and easy to understand each solution is. When you provide your feedback, each rating is adjusted accordingly. So, if you see a solution that has a poor rating that you think is a good solution, let us know by rating it. As you do, the rating will be adjusted and will become more accurate for other members of our site.

If you have any suggestions that you would like to make for our rating system, please ask a question in the Suggestions Zone of Community Support.

Thank you!

8.2

Bezier Surface-Surface Intersection

Asked by RobotMan in 3D Game Programming

Tags: surface, intersection, bezier

I need an algorithm for computing the intersection points between two bicubic Bezier surfaces. Specifically, I would like to use the Divide and Conquer approach. However, the only thing I can think of so far is as follows:

1. Test the bounding boxes of each surface patch for any possible intersection - if not, then exit.
2. Test for planarity of each surface patch - if not, then increase order of Bezier patch. Continue until sufficient planarity is acquired.
3. Determine intersections of plane segments.

With this algorithm, I am fairly comfortable performing steps one and two, but am unsure how to do step three. However, I am not married to this particular algorithm - it simply is the only one that I can think of. One potential problem that makes me hesitant is the ability to quickly overload the computer by increasing the order over and over again until each surface patch is sufficiently planar - something I foresee as requiring a very high order Bezier surface. If you are aware of another algorithm, feel free to submit that.

I'm pretty generous with points and do not feel that this problem is particularly difficult for someone who is comfortable with 3D graphics (I, however, am not - so I could really use some help). I would really appreciate a walkthrough of the logic that is need to carry this out.

One final note, I am attempting to do this in MATLab because I don't have any other programming language available to me. I am comfortable with many other languages (Basic, Fortran, Pascal C (rusty) and LISP (rusty), so please keep that in mind.

Many Thanks,
RobotMan

View the Solution FREE for 30 Days

20091111-EE-VQP-92

Bezier Surface-Surface Intersection

Asked by RobotMan in 3D Game Programming

Tags: surface, intersection, bezier

About this solution