Recommendation system estimates the direction after a large, widely used to customize the user or automatically personalized recommendations to improve the user experience. Recommended products like the Amazon home page, after the search recommendati
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The contact PV3D the engine, but also a semi-3D programming solution, so Mark two articles, to prepare for their own learning PV3D with .. The initial value of the human matrix with 9 (Matrix), to represent a three-dimensional object rotating positio
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This quote from http://www.goldenbg.com/article.asp?id=50 SVG (Scalable Vector Graphics) is an XML-based to describe the two-dimensional vector graphics and vector / matrix hybrid graphics markup language, is a new vector graphics specification. SVG
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Vector <br /> If the endpoint of a line segment is the order of the points, then this line is called a directed line segment, if the starting point of the line segment p1p2 p1 in the coordinates of the origin, you can call it vector p2 Vector additi
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Why use quaternion To answer this question, first look at the general on the rotation (for) a description of methods - Euler description method. It uses simple x, y, z values, respectively, in x, y, z axis rotation angle, its value for the 0-360 (or
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The concept of vector Vector addition and subtraction Vector cross product Folded segment of Guaixiang judge Determine whether the line segment point Determine whether two line segments intersect Determine whether the intersection of straight line se
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1. Problem Description: Find the number n the number of combinations of r 2. Problem: (1) the problem solution space for a group of element one-dimensional vector r (a1, a2, a3, ..., ar), 1 <= ai <= n, 1 <= i <= r with one-dimensional array of
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Taken from: http://www.blogjava.net/zhenandaci/archive/2009/03/01/257237.html Let me repeat once more complete we have to solve the problem: We have two types of sample points are (not limited to these points in the two-dimensional space) number, as
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COMSHARP CMS Wrote, "too numerous to mention popular JavaScript libraries, jQuery, MooTools, Prototype, Dojo, YUI. These feature-rich JavaScript library, combined with their plug-in, capable of performing almost any job, but it is there is a price, a
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