fisheye projection

The previous modelview transformation is equivalent to placing the camera and adjusting the position and angle of the object to be photographed. The projection transformation corresponds to adjusting the camera lens distance to obtain the scene. BelowCodeSet the current matrix mode to projection matrix: Gl. glmatrixmode (gl_projection); Subsequent coordinate transformations are for the

Gaussian-kruger projection and UTM projection are both variants of the horizontal mocator projection, at present, some foreign software or the supporting software of imported foreign instruments often do not support Gaussian-gram projection, but support UTM projection. There

§ 6 projection of vectors on the axis (projection) IAngle between two vectors of space: There are two vectors that are handed over to the point (if they are not intersecting, one of the vectors can be translated to make them cross), and one of the vectors is rotated inside the plane determined by the two vectors, so that the square direction of it overlaps with the square direction of another constant, so

The projection operation of the Hiberante object mode and the projection of the SQL statement (the hibernate usage of the aggregation function)Recently used hibernate projection, write a diary to record.(⊙o⊙) ... Prerequisites: Paired with Hibernate environment. MyClass refers to an entity class that has been mapped wellThe following 3 functions are the methods I

Because GIS describes the spatial information on the Earth's surface, it must be embedded in a spatial reference system, which is a coordinate frame, which is based on parameters such as ellipsoidal bodies. The three main coordinate systems currently used in China are: Beijing 1954, Xi ' an 1980 and WGS84.With the coordinate system, the ellipsoid, the data layer has geographic coordinates, which are the locations of the spherical surface with latitude and longitude. In order to be able to conver

In the introduction to world projection, we mentioned mocato projection, which isBy HollandCartographyG. Mercator was created in 1569. Currently, most popular map websites such as Google map and Baidu map all use this projection (Web mocato projection). Today we will briefly introduce this

In fact, this article should be called (1). After all, this article mainly focuses on theoretical knowledge and the previous article focuses on implementation formulas. Map projection used by network maps such as Google Maps and Bing (it seems that Baidu map is also a mocato projection), which is often called Web Mercator, the main difference between it and conventional mocato

Projection and reflection any part of the backlight of an object will produce a projection. if it is on a brighter surface, it will also reflect the reflection of the object, such as the water surface, glass desktop, marble floor, etc. So how to implement the projection effect? The following small series will introduce you to pss' realistic

Iphone/Ipad wireless projection to PC, Iphone Ipad projection pc Original Blog, reprinted, please indicate the sourceBlog.csdn.net/hello_hwc Some projection technologies will inevitably be used for Demo presentation of applications. At this time, it seems a little bad to give a speech with a data line. At this time, wireless

This article mainly describes how to use different languages to realize the normal calculation and Inverse Calculation of mocato, that is, the conversion of latitude and longitude and plane coordinates. Due to the rush of writing, there is something I don't understand in this article. I will add comments in turn in a few days. Macato Javascript function y2lat(a) { return 180/Math.PI * (2 * Math.atan(Math.exp(a*Math.PI/180)) - Math.PI/2); }function lat2y(a) { return 180/Math.PI * Math.log(Math.t

Confused for some time, today began to tidy up their own, but also to organize new knowledge.CSS3:Start from scratch: Now the most used in the page is the picture/container projection, text projection;Next, we summarize a projection problem:Box-shadow: Shadow type X-axis displacement y-axis displacement shadow size shadow extended shadow colorGenerally this write

Jquery projection animation and jquery projection Animation Click here to experience the effect: http://keleyi.com/keleyi/phtml/jqtexiao/26.htm : The Code is as follows: 1 In the example, the animation effect is implemented using jquery's animate function, see: http://keleyi.com/a/bjac/5b62295315de9ace.htmThe Math. floor is used to take an integer, For details, see: http://keleyi.com/a/bjad/s0ix7ao1.htmTh

Common JavaScript pop-up and back-projection advertisement implementation methods, javascript back-projection This article provides examples of common pop-up and back-cast advertisements in JavaScript. Share it with you for your reference. The specific analysis is as follows: Pop-up ads and background ads are mostly used on large websites and are also necessary code for webmasters. This code segment include

Proj.net is the. NET version of the open source map projection library proj.4, many GIS open source software projections are directly or indirectly using the Proj.4 library, proj.4 is written in C language. NET open source GIS project Nettopologysuite Development and maintenance of the latest version of the Proj.net project, address is: GITHUB.COM/NETTOPOLOGYSUITE/PROJNET4GEOAPI first, the concept of space coordinate systemA position in a space, usua

I. I will only talk about the most common types of projection: mocato projection, Gaussian-kerlenge projection, UTM projection, and lanbote" 1. Mercator projection 1.1 Introduction to Mercator projectionGerhardus Mercator 1512-1594 was developed in 1569 as an equi-angular ta

This paper introduces the normal projection process of the Cartesian coordinate system from the Earth coordinate on the ellipsoid plane. This paper studies how to transform the geodetic coordinate, the length and direction of the geodetic line and the azimuth angle of the geodetic plane. This paper focuses on the principle and method of Gauss projection, solves the problem of conversion from spherical to pl

1. Dynamic projection (ArcMap) The so-called dynamic projection refers to the spatial reference of Data In ArcMap or the coordinate system is the coordinate system of the file first loaded to the current workspace by default, and then the added Data, if it is different from the coordinate system of the current workspace, ArcMap automatically performs a projection

I. I will only talk about the most common types of projection: mocato projection, Gaussian-kerlenge projection, UTM projection, and lanbote"String 7 1. Mercator projection string 8 1.1 Introduction to mocato projection string 1 M

4.4 Common map projection in China Basic scale topographic map of China (1:1 million, 1:500,000, 1:250,000, 1:100,000, 1:50,000, 1:25,000, 1:10,000, 1:5,000) except 1:1 million, using Gauss-gram gauss–krüger Gauss-kruger projection (Horizontal isometric cylindrical projection, also called transverse Mercator Transverse Mercator