sketchup polygon

Address: http://blog.csdn.net/sun_shine_/article/details/18799739 Given the vertex coordinates (ordered) of a polygon, how do you obtain the area of the polygon?We know that any polygon can be divided into N triangles. Therefore, if we take this as the breakthrough point, the first step is to divide the given polygon i

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

Area DescriptionBeing well known for its highly innovative products, Merck wocould definitely be a good target for industrial espionage. to protect its brand-new research and development facility the company has installed the latest system of surveillance robots patrolling the area. these robots move along the walls of the facility and report suspicous observations to the Central Security Office. the only flaw in the system a competitor using agent cocould find is the fact that the robots radio

Scrambled Polygon Time Limit: 1000MS Memory Limit: 30000K Total Submissions: 7799 Accepted: 3707 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 at any vertex of

Returns the directed tangent of the parallel vertex between polygon. A directed tangent is as stated in its name. It is necessary to distinguish the parallel tangent from the inverse and the same direction.It is further assumed that the polygon is clockwise (clockwise when the vertices are arranged) and the tangent of the polygon is positive when the

Convex polygonThe judging method of convex polygon:1) Angle Method:Determines whether the inner angle of each vertex is less than 180 degrees, if less than 180 degrees, is convex, if greater than 180 degrees, it is concave polygon.2) Convex Package method:This method first calculates the convex hull of the polygon, the definition of convex hull is not mentioned h

How can I determine whether a point is inside a polygon? (1) area and discriminant method: determine the area of the triangle formed by the target point and each side of the polygon and whether it is equal to the polygon. If it is equal, it is inside the polygon. (2) angle and discriminant method: Determine the angle b

　　What are 3D polygon features?A polygon feature is a GIS object whose geographic representation (a series of x-and y-coordinate pairs for enclosing areas) is stored in a row of the database as one of its properties (or fields). Polygon features have two separate parts that may be used for modeling in 3D mode: their outer perimeter lines and inner areas. In almos

Given two Convex Polygon that are not connected (that is, not intersecting)PAndQTo find the point at the minimum distance between them (P,Q)(PBelongPAndQBelongQ). In fact, polygon do not intersect, because the polygon we call contains all vertices inside it. If the polygon intersect, the minimum distance becomes meanin

OpenGL ES Tutorial for Android-Part II-Building a polygon December 4th, 2009 by Per-Erik Bergman-Android,Embedded Previous tutorial was all about setting up the GLSurfaceView. Be sureRead it beacuse it's a really importent one to be able to continue. Building a polygon In this tutorial we will render our first polygon. In this tutorial, we will show our first