End of 2021 graphics of Shandong University

2021 SDU End of graphics

school of computing 2019 Family planning

1. choice question 5*2

1. Bresenham comparison DDA as well as The midpoint line drawing method optimizes some operations , Not included in these operations are
2. It's not difficult to forget
3. The maximum number of main vanishing points
4. It's not difficult to forget
5. phong Illumination model The most expensive operation

2. Big question

1. Scan fill pseudocode 10 branch

2. Which face blanking algorithms are available ： Painter 、Zbuffer、 Just one ZB Of zbuffer, Scan line Zbuffer, Interval scanning Zbuffer, There is another one in the textbook + Ray casting algorithm

3. Phong Illumination model Sketch Map as well as explain as well as $R=2NCos(\theta )-L$ The derivation process of

4. We give a triangle and a square in three-dimensional space , Ask if there is an intersection , Find out

5. Take an examination of the Transformation matrix That's it. abcd the , Then compound the changes , Relatively simple

6. Four control points are given

   1. Write three times Bezier It means , It is to bring in and change into $a{t}^3+b^{t}2+ct+d$ In the form of , I guess.
   2. Three times Bspline, Find the control point Nah ！ Textbook only Bspline -> Bezier Backward pushing is not very good
   3. Three times Hermite, seek $P(0),P(1),P^{\prime }(0),P^{\prime }(1)$ It's hard, too

7. Normal perspective projection however Added a transformation between the world coordinate system and the new coordinate system

   New coordinate system definition ：$eye(0,-2,0)movedynamicTo了primaryspot,primarysitmarkAxisNochange$

   Visual inspection indicates that the original coordinate system has been transformed , And then you just pan OK 了

   Three questions

   1. Draw schematic diagram
   2. Gave a point , Find the final projection + Coordinates of the new coordinate system
   3. Projection matrix

Review comments

Rotten
Rotten
Rotten

graphics ： Tell the truth , I didn't learn it myself . Part of it is that I am busy in the middle of this semester , I can't look at it after class , At the end of the term, I was in a hurry . second , But the two professors have different directions , One bias idea, A bias toward mathematics , It feels like a split . If it is "curve" The teacher is in class , The suggestion sounds good . If it is another teaching and research teacher , It is suggested to go directly to curve attend class;class begins perhaps see games101

however , The teachers are all very good , This course is also very valuable ,CG either CV、DL So volume , But the part that is very mathematical cannot understand , And then look games101 The experience is good , But I don't take the exam ~

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The above only represents personal impressions , There is no opinion or prejudice against the teacher .