webgl course

OpenGL 7th ~ Chapter 8 Cropping, raster, and hidden area Elimination Raster is the process of processing objects into fragments. Two things that must be done. First, make each set object pass through the graphic system. Second, assign a color value to each pixel to be displayed in the color cache. Four main tasks of the graphic rendering system Modeling-> geometric processing... Modeling: obtains a set of vertex data that represents the geometric object. Geometric processing: acts on vertex data

Lesson 7th: Light Parallel Light: directional lights Environment light: ambient lights Webgl does not have built-in support for light. Unlike OpenGL, webgl can help you process at least eight light sources. However, OpenGL can only deal with simple illumination. Even non-flat objects cannot be processed, and shadows cannot be processed. The goal is to virtualize the light source in a scenario. First, we nee

structure:The Code is as follows:Functionstart (){Varcanvas = document. getElementById ("glcanvas ");InitGL (canvas );InitShaders ();InitBuffers ();Gl. clearColor (0.0, 0.0, 0.0, 1.0 );Gl. enable (gl. DEPTH_TEST );DrawScene ();}The following methods represent the typical WebGL draw steps:Step 1: Initialize the WebGL work environment-initGLThe code for this method is as follows:The Code is as follows:Vargl;

Know WebGL and webgl Know WebGL Author: chszs, reprinted with note. Blog homepage: http://blog.csdn.net/chszs WebGL is a cross-platform and free Web standard for the underlying 3D drawing API. It is based on the OpenGL ES 2.0 standard. WebGL is a technology used to render 3D

.・ Use WebGL to generate VBOThe ingress uses the WebGL method to pass the information in the array to VBO.Combine the attribute function in vertex coloring tool with VBODuring VBO generation, data must be saved to the array first, because the vertex information (position) must contain x, y, z, therefore, the length of the array must be the number of vertices x3. At this time, you must note that multi-dimens

to the vertex coloring ER through VBO. VBO is also called the vertex cache. Like its name, VBO caches vertex-related intelligence. The vertex attributes are allocated one-to-one with VBO and then transmitted to the vertex shader.To generate a VBO, first prepare a matrix corresponding to the number of vertices. Here we use a common javascript Array. Of course, the Array object can also be used, but the associated Array cannot be used, use a one-dimens

One, why should I study WebGL?A chance, in the chat with friends, I heard of WebGL, may have seen in the past, but not particularly concerned about. Originally, JavaScript can also be very good rendering and display three-dimensional animation on the Web page, without the help of plugins, it sounds a great thing. University, the computer teacher let us study after class 3Dmax, various reasons, and did not l

Basic concepts of OpenGL and WebGLOPEN GL: A Professional graphics program Interface for cross-programming language, cross-platform programming interface specifications. It is used for three-dimensional image (two-dimensional also), is a powerful, easy to call the bottom-level graphics library.WebGL: A 3D graphics standard? Fused with JavaScript and open GL ES2.0? Hardware 3D accelerated rendering for HTML5 Canvas Web developers can use the system to display 3D scenes and models more smoothly in

Note: The article is translated from http://wgld.org/, the original author Sambonja 広 (doxas), the article if there is my additional instructions, I will add [Lufy:], in addition, The WEBGL research is not deep enough, some professional words, if the translation is wrong, you are welcome to correct. HTML5AndCanvasLabelNow ( 2 months)HTML5 is still in the draft stage.HTML5 supports web-side multimedia functions and canvas features, adding a lot of new

[WebGL entry] 6. vertices and polygon. webgl entry vertices Note: The article is translated from http://wgld.org/, the original author shanbenya (doxas). If I have additional instructions in the article, I will add [lufy:]. In addition, the research on webgl is not in-depth enough, and some professional words are required, if the translation is incorrect, please

WebGL notes (7): Paster (end of notes), end of webgl notes Paster The previous article mentioned two limitations on Textures: 1. Cross-origin security restrictions It is similar to AJAX, but does not test whether the root directory has a security configuration file (some xml files. Of course, it is not surprising that local browsing (file protocol) cannot call re

[Getting started with WebGL] 15th, color the polygon (specify the vertex color), and webgl Vertex Note: The article is translated from http://wgld.org/, the original author shanbenya (doxas). If I have additional instructions in the article, I will add [lufy:]. In addition, the research on webgl is not in-depth enough, and some professional words are required, if

3. Texture triangle 　 Although the triangle in the previous chapter looks bright, it is often not practical. We want to display an image on a triangle, or more appropriately, we want to display the part corresponding to the triangle in an image. This can be achieved through practical texture images. This is the purpose of this chapter. To enable webgl to access the specified image data, we need to save the image data to the texture objects in

[Getting started with WebGL] 21. Light source from parallel Light Source: webgl Light SourceNote: The article is translated from http://wgld.org/, the original author shanbenya (doxas). If I have additional instructions in the article, I will add [lufy:]. In addition, the research on webgl is not in-depth enough, and some professional words are required, if the t

Gl.crearcolor (red, green, blue, alpha)Specify the background color of the drawing areaGl.clear (buffer)Sets the specified buffer to the predetermined value. If the color buffer is emptied, the value specified by Gl.clearcolor () is used (as a predetermined value).WebGL relies on a new drawing mechanism called a shader (shader). Shaders provide a flexible and powerful way to draw two-or three-dimensional graphics that all

Although HTML5 has not yet been finalized yet, HTML5-based applications have blossomed everywhere on the Internet. As a result, webgl, which is composed of 3D rendering, has gradually moved away from the image of the dark girl show. Neither 3D developers nor those who grasp the technology development direction can avoid the impact of this new technology trend. 3D display in WebGIS currently uses a browser-specific 3D rendering plug-in for scenario di

What is WebGL?WebGL is a technology that uses JavaScript to achieve 3D graphics, and the browser does not need plug-in support, and Web developers can write code with a system graphics card (GPU) to render 3D scenes and objects.The WebGL-based OpenGL es 2.0,opengl ES is a subset of the OpenGL three-dimensional graphics API, designed for embedded devices such as p

the overall structure: The Code is as follows: Functionstart (){Varcanvas = document. getElementById ("glcanvas ");InitGL (canvas );InitShaders ();InitBuffers ();Gl. clearColor (0.0, 0.0, 0.0, 1.0 );Gl. enable (gl. DEPTH_TEST );DrawScene ();} The following methods represent the typical WebGL draw steps: Step 1: Initialize the WebGL work environment-initGLThe code for this method is as follows: T

[Getting started with WebGL] 4. Rendering preparation and getting started with webgl rendering preparation Note: The article is translated from http://wgld.org/, the original author shanbenya (doxas). If I have additional instructions in the article, I will add [lufy:]. In addition, the research on webgl is not in-depth enough, and some professional words are req

[WebGL entry] 1. browser preparation and webgl entry Note: The article is translated from http://wgld.org/, the original author shanbenya (doxas). If I have additional instructions in the article, I will add [lufy:]. In addition, the research on webgl is not in-depth enough, and some professional words are required, if the translation is incorrect, please correct