sketchup polygon

From a geometric point of view, a complex 3D shape can be expressed by a combination of enough small triangles. For example, a rectangle can form two triangles, for example: The cylindrical shape can be arranged by multiple triangles: However, the polygon in ArcGIS is not organized by the simple triangle method, but by the following three infrastructures: 1)Triangle strip, translated by the author:Triangle 2)Triangle fan 3) rings Next

Convex Polygon minimum perimeter external rectangle This problem is similar to the smallest area external rectangle. Our goal is to find an external polygon in the smallest box (for perimeter ).P. What is interesting is that the minimum area and the external rectangle of the minimum perimeter usually overlap. Some may wonder if this is always true. The following example answers this question: the

II, An extended separation coordinate axis method for Collision ResponseIt is very useful to detect the intersection of polygon, but more things can be done. When the polygon intersect, I want to remove them to avoid their intersection. The method of separating the axis can be used very well in this case, but some additional work is required. The depth of the intersection must be returned, and the directio

future. The third possibility means that the object will not collide at the frame, and the Separation Axis truly isolates the object. Therefore, no collision occurs between objects. The axisseparatepolygons () function will reflect this phenomenon and return the overlap or collision time. To distinguish the two, a negative value is returned when overlap is detected. If a collision in the future is detected, a positive value is returned. The function looks as follows: Bool axisseparatep

Reprint to: http://www.cnblogs.com/Kurodo/archive/2012/08/08/2628688.html for a rectangular collision, many people know.But in the face of Polygon graphics, most of the way to use multi-rectangle overlay. But I don't really like this way, I'm using a classic algorithm: SAT a fast detection of irregular convex polygon collision of the algorithm to give two convex polygons, if we can find an axis, so that the

1, problem description: given the polygons of N vertices, each vertex is labeled with an integer, each edge is labeled with A + (plus) or x (multiply) number, and the n edges are numbered clockwise by 1~n. A polygon with a n=4 vertex is given. Game rules: (1) First, remove an edge.(2) then do the following: Select an edge E, the edge has two adjacent vertices, it may be called V1 and V2. The integers marked by the vertices of the V1 and V2 are calcula

Problem Description: The known polygon point set C={p1,p2,..., PN}, its order is messy, connecting the n points in turn, unable to form a definite polygon, need to sort the point set C, then draw the polygon.The key to the point set sorting process is how to define the point size relationship.To sort by counter-clockwise as an example, the algorithm steps are as follows:Definition: Point A is counterclockwi

Yesterday when the test was suddenly found in the previous product written in the Earth's ellipsoid area of the calculation of the code a bit of a problem, so today is a complete correction, from the Qgis to key out the code to rewrite with C + +, the new code can be more accurate calculation of the surface of the ellipsoid polygon area, This basic function is very important to the measurement of the area in the function of space acreage, which is sha

2618: [Cqoi2006] Convex polygon Time Limit:5 Sec Memory limit:128 MBsubmit:878 solved:450[Submit] [Status] [Discuss] The vertex coordinates of n convex polygons are given by Description , and the area of their intersection is obtained. For example, when n=2, two convex polygons are shown below: The area of the intersecting part is 5.233. Input The first line has an integer n, which indicates the number of polygons, and the following describes each

To give you illustrator software users to detailed analysis of the use of polygon tools to draw the right hexagonal steel plate tutorial. Skill Sharing: 1, open adobe Illustrator software, execute menu File/new, pop-up New Document dialog box, set the name is: Metal effect, set width is: 190.5cm, height is: 25.4cm, as shown in Figure 1 Figure 1 2, select the Rectangle tool in the toolbox, drag a rectangular

To the users of the illustrator software to the detailed analysis to share the polygon tool to draw a realistic metal effect of the tutorial. Tutorial Sharing: 1, open adobe Illustrator software, execute menu "file"/"New", Pop-up New Document dialog box, set the name is: Metal effect, set width is: 190.5cm, height is: 25.4cm, as shown in Figure 1 Figure 1 2, select the Rectangle tool in the toolbox, drag a

Polygon portrait is very popular, the production process is not difficult, but to do a good job or to spend a certain amount of effort.Process: The first selection of good people like pictures, preferably high-definition large image; Then create a new layer, using the pen or lasso tool to start the hook polygon selection from the head, and fill in the middle area of the color, such as the details of the fea

Cvfillpoly (), the point is provided by the Cvpoint array. It allows Cvfillpoly () to draw multiple polygons in a single call. In the same way, the NPT is an array of points, corresponding to the polygon.Cvfillpoly () is stable and can handle complex problems such as self-intersecting polygons and polygon with holes. Unfortunately, however, the function is relatively slow to run.Let's first look at this sentence Cvpoint * pt =new cvpoint[3];Create a

This tutorial is mainly about Maya in append to polygon settings. Here are some examples: 1. Take a picture of a random polygon first. Select Append to Polygon settings, restore defaults by reset, click the plane, see the changes in the plane. Click on the border and make sure that you are at random at the point where you want to add it. I am here to make a p

I checked the information carefully. Some people have summarized the division of polygon through the Internet. Although OpenGL glutesselation is easy to use, it is said that the algorithm is not efficient. The better algorithm is the ploy2tri algorithm. Try again if you have time.Triangulation of simple polygons Ben discoe, notes from 2001.02.11, updated through 2009.01 I needed some code for tessellating polygons, which cocould be integrated into the

Rotating Scoreboard Time Limit: 2000MS Memory Limit: 65536K Total Submissions: 5300 Accepted: 2112 Description This year, ACM/ICPC World finals will be held in a hall in form of a simple polygon. The coaches and spectators are seated along the edges of the polygon. We want to place a rotating scoreboard somewhere in the hall such that a spectator sitting anywhere on the

Sometimes it is necessary to obtain the intersection between a straight line and various graphics, including polygon and various QT graphic boxes. For example, to keep the connection line on the side of a polygon and point to the center of the polygon, we need to obtain the intersection of the AB and polygon of the

Topic: Lifting the Stone Time limit:2000/1000 MS (java/others) Memory limit:65536/32768 K (java/others) Total submission (s): 168 Accepted Submission (s): 98 problem Descriptionthere is many secret openings in The floor which is covered by a big heavy stone. When the stone was lifted up, a special mechanism detects this and activates poisoned arrows that was shot near the opening . The only possibility are to lift the stone v

occupied by the new facility from the movements of a robot along Its walls. You can assume the a polygon with corners on a rectangular grid. However, your boss insists that's use a formula he's so proud to has found somewhere. The formula relates the number I of the grid points inside the polygon, the number E of the grid points on the edges, and the Tota L area A of the

Tags: alt ASE Freopen Property CIN Index Center greatest starting D. Polandball and PolygonTime limit per test 4 seconds memory limit per test megabytes input standard input output standard outputPolandball have such a convex polygon with n veritces that no three of it diagonals intersect at the same POI NT. Polandball decided to improve it and draw some red segments. He chose a number k such that GCD ( n , k ) = 1. Vertices of the