sketchup polygon

Can someone tell me why the output of sum_area is always 0 (the polygon center of gravity) and the sum_area center of gravity?Polygon Center of Gravity Problem time limit: 3000 MS | memory limit: 65535 KB difficulty: 5 Description On a polygon, n points are obtained. The n points are given in order and adjacent points are connected in a straight line

After judging whether a coordinate point is within a polygon, there is another requirement that when I have this coordinate point outside the polygon, I need to calculate whether the distance from the polygon to the polygonal is calculated by the latitude and longitude coordinates of the two locations in the range of the coordinates (C # version).Turn from: 78423

should contain exactly and numbers separated by one space. These numbers is the coordinates of the centre of gravity. Round the coordinates to the nearest number with exactly, digits after the decimal point (0.005 rounds up to 0.01). Note that the centre of gravity may outside the polygon, if it shape is not convex. If There is such a case in the input data, print the centre anyway.Sample Input245 00 5-5 00-541 111 111 111 11Sample Output0.00 0.006.0

Title Link: http://poj.org/problem?id=1179Time limit:1000ms Memory limit:10000kDescriptionPolygon is a game for one player this starts on a Polygon with N vertices, like the one in Figure 1, where n=4. Each vertex are labelled with a integer and each edge are labelled with either the symbol + (addition) or the symbol * (pro Duct). The edges is numbered from 1 to N. On the first move, one of the edges is removed. Subsequent moves involve the foll

"Dichotomy + Computational Geometry" HDU 4033 Regular polygon Topic Link: hdu 4033 Regular Polygon TopicThe edge length of the polygon is known by the distance from one of the inner points in the regular polygon to all vertices.Binary problems generally exist with an unknown amount of equation (equation relationship),

// Declaration: polypolygon (DC: HDC; {Device environment handle} var points; {point array} var npoints; {array, the array element is the number of vertices of each polygon} P4: INTEGER {Number of polygon, that is, the number of npoints elements}): bool; // Example: Procedure tform1.formpaint (Sender: tobject); var PS: array [0 .. 9] of tpoint; PN: array [0 .. 1] of integer; begin {

Inside a polygon, the distance between the point and each point of the polygon is given to determine the side length of the polygon. Starting from the definition of a positive polygon, each side is equal to a polygon with equal angles. The

1. theoretical support: If a Ray from the point to be judged has an odd number of focal points with the polygon, The point is within the polygon; otherwise, the point is outside the polygon. (Rays cannot interwork with polygon vertices) 2. Programming ideas: The idea of this program is to make a horizontal Ray (paralle

Polygon center of gravity, center of gravityPolygon Center of Gravity Problem time limit: 3000 MS | memory limit: 65535 KB difficulty: 5 Description On a polygon, n points are obtained. The n points are given in order and adjacent points are connected in a straight line (the first and last connections ), all line segments do not overlap with other line segments, but can overlap. You can obtain

Description Returns the coordinates of each point of a convex polygon for its area. Input Multiple Input groups. The first positive integer t represents the number of groups. A positive integer N (1 ≤ n ≤ 1000) In the first line of each group indicates the number of vertices in the polygon, In the next n + 1 line, each line has two int

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