polygon diamonds

the area of an arbitrary polygonThe vertex coordinates of a given polygon (ordered), so you can find the area of the polygon, what would you do?We know that any polygon can be divided into n triangles, so, if this is the breakthrough, then our first step is to divide the given polygon into a number of triangles, respec

InGISSome geometric features are often used in software development.Algorithm, Such as the construction of a triangular network, the division of polygon, the relationship between points, lines, and surfaces. The relationship between points and polygon is a very important basic task. In the determination of the relationship between points and polygon, the common

Opengl basic learning topic (2) vertices, straight lines, and polygon Digress As learning grows, I feel more and more confused. In the previous blog, we recommend that you use a simplec framework based on VS2015 to learn opengl. Some problems. 1. The Release version is not considered in the VS Debug mode. 2. In this version, some Macros in the basic header files of chead and c are poorly designed, such // 4.0 print the error message on the console #

IntroductionThis article describes how to perform precise and efficient Collision Detection in 2D action games. Here, the collision is based on Polygon rather than on the genie. The two are designed differently. The collision detection based on the genie is completed by overlapping pixels between the elves. The polygon uses vector mathematics to accurately calculate the intersection, time, and collision dir

Polygon is alsoThe GDI object also complies with the rules of other GDI objects, but it is usually not selected into the DC. In MFC, polygon is represented by CRgn. A polygon is used to represent a region different from a rectangle and has similar operations with a rectangle. For example, it checks whether a point is internal and performs operations. In addition,

Convex Polygon minimum area external rectangle Returns a convex polygon.PThe minimum area can be mountedPWhat is the rectangle of (as far as the periphery is concerned? Technically speaking, given a direction, we can calculatePAnd create an external rectangle. But do we need to test each case to obtain each rectangle to calculate the minimum area? Thank God, we don't have to do that. For PolygonPAn external rectangle of is located with an edge of the

I. Ray discriminant method: For all simple polygonsA simple polygon is a polygon that does not intersect adjacent edges. Determines whether the point P is inside the polygon G, including the boundary. For freeform polygons, a ray method can be used. For a given point to the left to make a parallel x-axis of the Ray L, to find out the number of intersections of L

Determine whether the point in the polygon has three steps: (from CSDN) The first step: to determine if this point is the end of the polygon;The second step: Judge whether this point falls on the boundary of the polygon;The third step: through this point transverse to make a parallel ray, to judge the number of intersections with the

Usage scenarios: 1: The restaurant draws a polygon on the map to indicate the range to be delivered (the restaurant is the Pio on the cloud); 2: After the user opens the application, locates; 3: Automatically match the restaurant where the current location can be delivered (i.e. the user's location is within the restaurant delivery area) I looked at the API as if I could not implement the function I want, the API implements the function is: 1: Based

Scrambled Polygon Time Limit: 1000MS Memory Limit: 30000K Total Submissions: 7214 Accepted: 3445 DescriptionA closed polygon is a figure bounded by a finite number of line segments. The intersections of the bounding line segments is called the vertices of the polygon. When one starts

Cocos2d-x 3.0 new physical system I don't have to say much, contact for a period of time, I feel good. For those basic concepts, there have been a flood of tutorials on the Internet, so I won't say much about them. However, there are not many tutorials on Creating polygon objects. Many of them are creating circles and rectangles. These two are very simple, you can simply import the image size data. The trouble with

Tags: geometric semi-plane intersection poj Define a polygon called a star polygon. This polygon is a polygon with a kernel. Give some polygon and ask if it is a star polygon. Idea: solve with semi-plane intersection. PS: The Cod

Math in libgdx encapsulates the polygon class, which is described by Multiple Fixed Points. During collision between objects, the object contour is sometimes irregular, at this time, we can use a polygon to outline its approximate contour and simulate it. The polygon function includes the point contains function. Through this function, we can determine whether tw

Question meaning: 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 the connected image of a polygon, a line segment, or a polygon and a line segment; If it is a line

Project needs, need to judge points in the interior of the polygon, is the entire algorithm necessary steps, check some information, Chinese very few, the English material has been introduced very clearly, here is just a summary.The complete description of the problem is to judge a point on the inside, outside, or boundary of the polygon.There are two ways to solve this problem: Ray casting algorithm, surround number method.Ray casting algorithm :A si

is doing a project, to determine whether the point is within the polygon, the implementation of the language can be C # or Java, two are required, in fact, both languages have their own class library method can be judged, Baidu can be found, polygon needs to consider concave polygons, There is a better understanding of the implementation method is through the single-sided Ray and

This article describes a method that uses MySQL to determine whether a point is within a specified polygon area and provides a complete process. 1. Create a test table CREATE TABLE ' zone ' (' id ' int (ten) unsigned NOT null auto_increment, ' Polygongeo ' polygon not NULL, PRIMARY KEY (' id ')) EN Gine=myisam DEFAULT Charset=utf8; Note: Spatial indexes can only be created in tables where the storage engin

Test instructions: There is a long l w rectangle, the lower left coordinate is (0,0), now there are n line segments to cut the rectangle, to ensure that each line of two endpoints fall on the different sides of the rectangle, the rectangle is divided into a number of areas, there are now M circle drawn into the rectangle, ask the circle covers which areas, and the area of these areasSolution: To cut the rectangle first, the method is to each read into a line segment is taken to deal with the cut

Http://poj.org/problem? Id = 2007 Time limit:1000 ms Memory limit:30000 K Total submissions:6701 Accepted:3185 DescriptionA closed polygon is a figure bounded by a finite number of line segments. the intersections of the bounding line segments are called the vertices of the polygon. when one starts at any

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