nautilus geometry

The method of drawing function images by using the stroke method is not limited to a function, but is suitable for drawing any image of a function. The following is an example of function y=x3, which describes how to draw a function image using the geometry artboard to draw points.　　The following steps are described:1. Execute the draw-Define coordinate system command, create a new coordinate system, and set the label of the origin coordinates to O.2.

Note: This is one of the brief personal summary series of the MOOC course in Deng Junhui, Tsinghua University, in spring 2016, and I will synchronize the course content updates. However, it is possible to write not exactly the course content, but also some personal understanding. If you are interested in computational geometry after reading this article, please go to the appropriate MOOC platform to learn the full course of teacher Deng. Such well-des

Test instructions is a world with many countries, each with n buildings, including a power station and N-1 buildings, all of which are surrounded by a convex hull that is the size of the country. A missile that explodes within a country can cause the country to power down.Step 1: Find the convex hull of each country (I use the horizontal sort is all kinds of pits, change the fork by the sort before, mainly is the back area of the time need this fork to sort information).Step 2: Determine whether

numbers x1, y1, x2, y2, where (x1, y1), (x2, y2) is t He coordinates of the trees of the opposite neighbors. Input is terminated by end of file.OutputFor each line of input produce one line of output which contains the line "impossible." without the quotes, if yo U cannot determine the coordinates of the other and the trees. Otherwise, print four floating point numbers separated by a single space with ten digits after the decimal point ax1, Ay1, Ax2, Ay2, where (Ax1, Ay1) and (AX2, Ay2) is the

The main topic: given some alloys, choose the least alloy, so that these alloys can be synthesized according to the required alloyFirst of all, the idea of this problem is very strange to see how this problem can be thought of computational geometry and calculate geometry and how to hang with Floyd good strongFirst because a+b+c=1 so we just have to get a and B can c=1-a-b so C can not read into theAnd then

In SQL2008, the support of geospatial data types is added, which is divided into 2 kinds: Euclidean (plane) geometry geometry and geospatial (elliptical body) Geometry geography. European geometry you've basically learned, is expressed in terms of coordinates, and geographical space is the use of longitude and latitude

appears to be a superficial phenomenon, essentially a business model that Nokia has continued to monetize through its patented push-plate. In the author's view, this business model has certain feasibility, but there are certain risks, after all, only the licensing, Nokia how to monitor product quality is a big problem. Suppose the quality of the product is not well, unlucky or Nokia brand. Of course, Nokia can find a sustainable business model to solve the pressing problems, without compromisin

This article focuses on the intersection of line segments.Given two line segments, how can I tell if the two segments intersect?If the two segments intersect, how do you find the intersection?Line intersection problem is usually because of its complicated situation of the kind of people to avoid and far, here hope through the author's simplified discussion hope to help readers to comb the idea.First, we try to draw a few geometric images to find out the intersection of a number of different case

materials is different. Then, each raw material is taken out of a certain amount, after melting, mixing, to obtain a new alloy. New alloys of iron and aluminumThe proportion of the tin to the user needs. Now, the user gives the n kinds of alloys they need, and the proportion of Fe-al-sn in each alloy. The company hopes toTo order a minimum variety of raw materials, and use these raw materials to produce all the types of alloys required by the user.InputThe first line is two integers m and n (M,