sketchup polygon

1. Point-drawn Polygon // Defines the dot-draw mode of the filled polygon. Mask is a 32x32 bitmap pointer. If the value of 1 is 0, the polygon point painting function void glploygonstipple (const glubyte * mask) must be enabled before use ); // draw a rectangle void glrectf (glfloat X1, glfloat Y1, glfloat X2, glfloat Y2 );2. Example # Include 3.

A simple polygon is a polygon with different edges. Calculate the center position of all vertices. Then obtain the polar angle between each vertex and the center. Then sort the polar angles. Connect the sorted points. The result is as follows: The Matlab code is as follows: Clear all; close all; clc; n = 30; P = rand (n, 2); CEN = mean (p); Ang = atan2 (P (:, 1) -CEN (1), P (:, 2)-CEN (2); % P = [p

Polygon Area Calculation Formula Function polygonArea (points) {var I, j; var area = 0; for (I = 0; I Polygon Area Formula description: We all know the three-point area formula of A (x1, y1), B (x2, y2), and C (x3, y3). | x1 x2 x3 |:S (A, B, C) = | y1 y2 y3 | * 0.5 = [(x1-x3) * (y2-y3)-(x2-x3) * (y1-y3)] * 0.5 Polygon area formula: | X1 y1 | x2 y2 |... |

Link: Codeforces 437E The Child and Polygon Question: Give a polygon and ask how many kinds of segmentation methods are available. Divide the Polygon into multiple triangles. Solution: first, we need to understand the nature of the Cross Product of the vector. At the beginning, we need to convert the given point to clockwise, and then use the interval dp for calc

Question: How to calculate the kernel template with polygon Idea: I use the semi-plane intersection of O (nlogn), but one problem is that when the polygon kernel is a vertex, the answer to the semi-plane intersection is a null set, but the output should be yes. There is no good solution. In the end, we can only move all the straight lines to the right and then find the kernel. However, in this case, differ

Author: Zhu Jincan Source: http://blog.csdn.net/clever101 Recently, using GDI, we found that its polygon (HDC, APT, icount) function will plot the polygon boundary. The Code is as follows: Case wm_paint: As follows: It can be seen that the boundary of the polygon is drawn using a black line. Obviously, this is drawn using the default paint brush. However, i

To the users of Photoshop software to detailed analysis of the use of polygon lasso tools to pull out examples of experience. Share list: 1, open "PS" software. (I'm using psCS4) the following figure 2, in PS Open a background badges picture, the following figure 3, double click on the right layer, appear "Layer 0", press "OK" as shown below 4, right button "Layer 0", click "Duplicate

Tags: Android blog HTTP Io OS ar JavaImport 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 of the single side ray of this po

Returns the vertex of a polygon in order and calculates the area of the polygon kernel. The answer retains two outputs. Idea: semi-plane intersection. When adding edges, we should discuss the first and last points. Otherwise, WA will be miserable. Code: #include Poj 1279 art gallery polygon kernel Area

To determine whether a two-dimensional coordinate point is within a polygon range box, first give the coordinates of each vertex of the range box (given in a clockwise direction), put in two arrays and then compare the size range to determine whether the point is in the Polygon return boxCode is as follows:public class Rangepoint {double[] x_points;double[] y_points;public rangepoint () {}public rangepoint

To the users of the illustrator software to the detailed analysis to share the simple and quick to turn the picture into a polygon background of the production tutorial. Tutorial Sharing: One, choose the picture It is important to choose a picture that is rich in color and meets the needs of the design environment. In this case, I chose such a picture to open in the AI. Second, the SOFTWARE setup B

To give you illustrator software users to detailed analysis to share the design of a very cute polygon bird painting tutorial. Tutorial Sharing: Well, the above information is small set for you illustrator of this software users to bring the detailed design of a very Meng polygon birds of the drawing tutorials to analyze the entire content of the share, you see the users here, small knitting b

There are four ways to create polygon groups in ZBrush using polygon groups: Auto Group [automatic groups]; UV Groups [UV Group]; Group Visible [visual groups] and material Groups [material groups]. This article will introduce each of the four methods. The auto Group is about to create a new group for each of the separate polygon objects. Creating automatic Gr

I. Background: How to determine whether a specified latitude and longitude point falls in a polygon region. Second, the Implementation Code (Delphi) Code Code highlighting produced by Actipro Codehighlighter (freeware)http://www.CodeHighlighter.com/ -->typeTmypoint = Packed recordx:double;y:double;End{*------------------------------------------------------------------------------Determines whether the specified latitude and longitude coordinate point

Cross product AXB is calculated as a vector perpendicular to a A, b vector, whose size |axb|=|a| | b| The geometric meaning of the =x1 y2-x2 y1 modulus of sin (A, b) is the area of the parallelogram with a A and B, and the area of the polygon can be computed using the cross multiplication of the vectors. coordinate expression |axb|=x1 y2-x2 y1. Main Topic Enter a series of numbers, different numbers represent different motion directions, and calculate

) B. Area discrimination method (only for convex polygons) C. Angle and discriminant method (any polygon can be) For the generality of later storage procedures, the choice of use angle and discriminant method more meet the requirements.2.2 Principle of angle and discriminant method principle: make P={P1,P2,..., pn,p1} is a closed polygon with a vertex of Pi (xi,yi), i=1,2,..., N, and PT is a test point. PTP

This article is to Zhao Ming teacher "computer graphics" MOOC course part of the chapter small summary.Polygons are represented in two ways: vertex representation and dot matrix representation.X-Scan line algorithm:　　　　　　The algorithm steps are summarized as follows:　　　　　　　　Attention:　　　　　　　　Improved:　　　　　　　　To avoid intersection operations, a special set of data structures is introduced:　　Raster graphics in computer graphics--X-Scan algorithm and improvement of

template classes that implement basic functionality, making it easier to develop Java EE applications. For example, the JdbcTemplate class and the JDBC, Jpatemplate class, and Jpa,jmstemplate classes and JMS can all be used well together. The Resttemplate class is very concise, and the code that uses this template is very readable and maintainable as well. Spring provides declarative transaction processing, job scheduling, identity authentication, a mature web MVC framework, and integration w

bounded queues to use unbounded queues in the case of some potentially explosive growth.4) with a very long task, the use of non-blocking queues to replace locks with CAS operations can achieve good throughput.3. How do I use a blocking queue to implement a producer and consumer model?4. Which concurrent container should be used for multi-read and less-written scenes, and why use it? For example, you do a search engine, search engine every time before you need to determine whether search keywor

16 write thread execution, concurrency performance improvement is obvious. The 16 threads mentioned above refer to the write thread, while the read operation does not require a lock for most of the time. It is only necessary to lock the entire hash table when working with size. In terms of iterations, Concurrenthashmap uses a different iterative approach. In this iterative approach, when iterator is created, the collection is no longer thrown concurrentmodificationexception and replaced by ne