sin

In scientific research and engineering application, the algorithm often has to do a lot of mathematical calculation, including matrix operation. These operations are generally difficult to use manually accurate and fast, but the use of computer

Define (' Earth_radius ', 6378.137);//Earth radius Define (' PI ', 3.1415926); /** * Calculate the distance between the two sets of latitude coordinates * PARAMS:LAT1 latitude 1; lng1 longitude 1; lat2 latitude 2; lng2 longitude 2; Len_type (

Special effects in the production of examples, only use simple copy statements and movie clips _x (coordinates), _rotation (angle) and other attributes. Examples are not complicated, but often a simple and graceful graphic with a piece of

Today I see someone is already discussing how to get Google satellite images, see http://www.cnblogs.com/tangf/archive/2006/07/23/457902.html? Login=1&commentid=1507040#post a blog, which copied the JavaScript and Delphi code to come, I am here

Remember when you first started learning as! I've consulted a lot of people about this as!. But the effect is always not ideal! The past few days looked at the mathematical data to find an unexpected harvest Ah! Share it with everyone! It seems that

"Take the Last Piece" The coordinate value is the theoretical value, or the geometrical position of the celestial body, but the FK5 system is a visual system, that is to say, the human eye observation effect (optical position), which needs to be

This article will lead you together, through the ActionScript script in Flash programming, to achieve the festival fireworks animation. At the beginning of the fireworks will appear three-dimensional animation, and then gradually fall and disappear

An important theme of "JDK1.5" (the development of the Tiger) is to simplify development by adding features such as generics, For-each loops, automatic packaging/unpacking, enumerations, variable parameters, static import. Using these features helps

In order to explain the convenience, I enclose the source code and the effect chart first. The code is as follows: Using System; Using System.Drawing; Using System.Collections; Using Zedgraph; Namespace Zedgraph.demo { Summary description for

This is a very cool HTML5 canvas animation, it will simulate the reality of our real life fireworks animation effects, the effect is very realistic, but after all, computer simulation, with a girlfriend to see it, the effect is still poor point,

HTML5 's canvas is very powerful. The use of its canvas can easily draw Bezier curve, for everyone to use later, special to share the implementation code, there is a need for friends can refer to the The code is as follows: draw Bezier

Back to "flash Basic Theory Class-Catalog" Practical formula In the book, we already have a variety of motion and effect formulas. I've extracted the most useful and commonly used formulas, equations, and snippets of code, and listed them at the

Javascript| Tips Seventh episode how to generate Chaos number Next we're going to introduce you to a function that can generate chaos, and this function, written in JavaScript, just takes advantage of a little trick. This technique, in most

When inserting media code with TINYMCE, the original HTML is replaced with an IMG tag, and the raw data is converted to JSON-formatted data, for example: Raw HTML fragment: TINYMCE Formatted HTML fragment: To the official website and

function | download Using System;Using System.Drawing;Using System.Collections;Using System.ComponentModel;Using System.Windows.Forms;Using System.Net;Using System.IO;Using System.Text; private void Button3_Click (object sender, System.EventArgs

The parabolic motion of an object is one of the basic sports physical models in the game. In the PC game can be easily simulated by the gravity formula, but in mobile games, because most mobile phones do not support floating-point operations so can

Use Flash to make interactive animation, games, must use the flash as. To use good flash,as is necessary to learn. I write this article, I hope to learn as a friend to help. The author divides this example into the realization basketball horizontal

Value that defines the angle of PI one pointDefine ("PII", m_pi/180); Creates a new image resource and defines its background as white, with a foreground color of black$im = Imagecreate (670,500);$white = Imagecolorallocate ($im, 0xFF, 0xFF,

Specification Chapter III anonymous method Original: Microsoft Corporation Original: http://msdn.microsoft.com/vcsharp/team/language/default.aspx (Specificationver2.doc) Translation: Lover_p Source: -------------------------------------------------

The canvas knowledge points are summarized as follows so that they can be consulted at any time. 1, filled rectangular fillrect (x,y,width,height); 2, draw the rectangular frame strokerect (x,y,width,height); 3, Erase rectangular clearrect