polygon poster

Original address: http://www.html-js.com/article/1538 (front end stew) Ray method is a very simple and intuitive way to judge whether a plane interior point is inside a polygon. In addition to the Ray method there are many other methods, today we will introduce a way to judge by the number of rotation. A closed curve in a plane is the number of rotation (also called a winding number) of a point, representing the total number of times the curve bypasse

1. Use Matlab as a closed polygon drawing Instead of finding a function that directly draws a polygon, you can only save the coordinates of each point in an array, connect a point to its adjacent point, and attach the last point to the first point. The following is an example of the. m File: Copy Code code as follows: Clear CLC A=[0 2 4 6 8 10 12 14;0 2 1 4 6 6 5 7]; % the point coordi

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

This is also a troublesome computing geometric question. Only then can I find that I am too unfamiliar with the computational geometric problem. I thought the algorithm was not completed during the examination and it was quite depressing. Question: Give you a polygon in order (maybe a complex polygon) and ask you to find the boundary of this polygon. This so-call

Two methods are used to determine whether a vertex is in any polygon.Import Determines whether the touch point is inside a polygon.Method 1. Mathematical Methods The advantage of this method is that any platform can be used, not only for AndroidAlgorithm: Solve the intersection of the horizontal line and each side of the polygon through this point. If the intersection of one side is odd, it is true. Okay, we actually need to look at the intersection o

Maximum Distance between convex polygon Given two Convex PolygonPAndQTo find the point (P,Q)(PBelongPAndQBelongQ) To maximize the distance between them. Intuitively, these points cannot belong to the interior of their respective polygon. This condition is actually very similar to the diameter problem: Two convex polygonPAndQThe maximum distance is determined by the pair of distance points between polyg

Document directory 3. Configure through map control The previous chapter Bing map Learning Series (5) -- How to Use the graph nail layer and map layer describes how to use the graph nail layer and map layer, this chapter describes in detail how to use Bing Maps Silverlight control to draw a polygon. Thanks to original: http://www.cnblogs.com/beniao/archive/2009/12/09/1616956.html Bing Maps Silverlight control allows you to customize

glass is like the polygon in Figure 1, you have just two ways to put it on the table, since all the other ways are not stable. however, the glass like the polygon in Figure 2 has three ways to be appreciated. Pay attention to the cases in Figure 3. We consider that those glasses are not stable. Inputthe input file contains several test cases. the first line of the file contains an integer t

It is still computational ry. The principle of determining the relationship between points and polygon is as follows: A ray is drawn from the point to be judged. The ray and the polygon intersect. If the intersection is an even number, the vertex is not within the polygon. If the intersection is an odd number, the vertex is within the

A simple method for detecting a convex polygon collision is the SAT (separating axis theorem), the separation axis theorem .Principle: The polygon is projected onto a vector to see whether the projections of the two polygons overlap. If they do not overlap, the two polygons are considered separate, otherwise a vector is found to continue the projection. We don't need to compare a lot of vectors, because it'

Title Link: http://poj.org/problem?id=1265Test instructions is: There is a robot walking in a rectangular grid, the starting point is (0,0), each movement (dx,dy) of the offset, known, the Robot Walk is a polygon, the robot in the grid to find the area, there is to find the polygon and polygon inside the number of mesh points;The Pique theorem:In a

2 . Polygon(Polygon.pas/c/cpp)"Problem description"In a planar Cartesian coordinate system, a simple polygon [1] with a vertex transverse ordinate is given as an integer, and the number of points in the polygon where the horizontal ordinate is an integer is obtained.InputThe input file name is polygon.in, a total line, and the first line contains a positive integ

Low poly (low-poly) font design is the latest and hottest design trend. The low-polygon font design is based on a 3D mesh with a small number of polygons, combined with some rendering techniques and lighting effects, to make these meshes look like paper crafts or origami works.Low polygons often need to be implemented using 3D software, but this tutorial will teach you how to use the basic PS tool to achieve its 2D lite, and to make the low-poly effec

From: http://blog.csdn.net/tiaotiaoyly/article/details/20874981, the quality is concentrated on the vertex . n Vertex coordinates (xi,yi), MI in mass, center of gravityX =∑ (XIXMI)/∑miY =∑ (YIXMI)/∑miSpecifically, if the quality of each point is the same,X =∑xi/nY =∑yi/n2, uniform mass distribution . The problem is this type, the algorithm and the above differences.In particular, the triangular center of mass is evenly proportioned:X = (x0 + x1 + x2)/3Y = (y0 + y1 + y2)/3If we find the center of

calibrated with the intersection of the nets. For example, the following:After the move is complete, it becomes the following:Next, merge the two point layers together, merging the tools with either merge or Append, and choose to merge. Put this merged point layer. As the center point of the Tyson Polygon, generate too Tyson polygon. For example, the following:Tyson Po