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white space is also a character element! / Jump off characters and remove special meanings from special symbols! Example:grep-n/' Regular_express.txtSearch for the line that contains the single quotes! * Repeat 0 or more of the previous RE characters Example:grep-n ' ess* ' regular_express.txtFind the string containing (es) (Ess) (ESSS) and so on, note that because * can be 0, ES is also compatible with the search string. In addi

Abstract: Part I analyzes the synchronization problems between GPU clients and the basic principle of the extended synchronization point MECHANISM OF CHROMIUM GL. This article analyzes the implementation of the synchronization point mechanism from the source code perspective. The implementation of the synchronization point mechanism mainly involves how to implement two GL extension interfaces, insertsyncpoi

Label: chromium syncpoint Abstract: The GPU process architecture in chromium allows multiple GPU clients to access the GPU service at the same time, while multiple GPU clients may have data dependencies, such as when rendering a webgl page, therefore, a synchronization mechanism is required to ensure the order of GPU operations. This article discusses the synchronization between GPU clients in a multi-process architecture and the basic principles of the syncpoint mechanism. GPU process architect

functions of WebGL, in this paper, we do not use a perfect framework, but only use a framework (gl-matrix.js) to help calculate the matrix ). Like using OpenGL, We need to initialize the use environment and extract some global usage. The related code is as follows: Initialization: Var gl; // WebGLRenderingContextvar cubeVBO; // Cube buffer IDvar sphereVBO; // sphere VBOvar sphereEBO; // sphere EBOvar cubeT

The previous article describes WebGL.Further streamlined here.The whole content of WEBGL is to create different shaders,Provides data to the shader and then calls gl.drawArrays or gl.drawElementsLets WebGL invoke the current vertex shader to process each vertex, calling the current fragment shader to render each pixel.Since shaders require data, shaders are divided into two parts, vertex and fragment shadersThe data that is required by the vertex shader can be obtained in the following three way

-grid diagram, it is not necessary tostruct Edgenode *next; Chain field, pointing to the next adjacency point} Edgenode;typedef struct vertexnode{//Vertex table nodeVertextype data; Vertex fields, storing vertex informationint in; Number of storage vertex-in degreesEdgenode *firstedge; Edge table Header pointer} Vertexnode;void Creategraph (Vertexnode *gl, int n, int m);//The Vertex and edge information is read into the adjacency table of the represen

textures.Textures are processed in WEBGL using texture objects, and the CreateTexture function is required to generate texture objects.Examples of use of >createtexturevar tex = Gl.createtexture ();This function has no parameters, but simply returns a texture object, passing the above code, the variable tex is an empty texture object.After the texture object is generated, the texture object is then bound to WebGL. Let's think about it, the previous use of cached objects in WebGL is also require

. The default value of the function parameter is 1, which is why the square above is white. Create a new class called FlatColoredSquare it shocould be identical to the Square class. Then in the FlatColoredSquare function draw, add this line: Create a new class named FlatColoredSquare to distinguish it from the Square class. Add the following line to the painting function: Gl. glColor4f (0.5f, 0.5f, 1.0f, 1.0f); // 0x8080FFFF I usually add a comment li

private void openGLControl1_OpenGLInitialized(object sender, EventArgs e) 22 { 23 24 } 25 26 private void openGLControl1_Resize(object sender, EventArgs e) 27 { 28 29 } 30 31 private void openGLControl1_OpenGLDraw(object sender, PaintEventArgs e) 32 { 33 SharpGL.OpenGL gl = this.openGLControl1.OpenGL; 34 35 gl.ClearColor(0, 0, 0, 1); 36 gl

Method@ OverridePublic Boolean ontouchevent (motionevent e ){Float y = E. Gety ();Float x = E. getx ();Switch (E. getaction ()){Case motionevent. action_move:Float DY = Y-mpreviousy; // calculates the y displacement of the touch pen.Float dx = x-mpreviousx; // calculates the Y-shift of the touch pen.Mrenderer. cylinder. manglex + = Dy * touch_scale_factor; // you can specify the Rotation Angle along the X axis.Mrenderer. cylinder. manglez + = DX * touch_scale_factor; // you can specify the Rota

string that stores N-relationshipsVertexnode *GL: Array of vertex tablesOutput variable: An array of vertex tables representing graphsreturn value: Int: number of vertices*/Intcreategraph (char *data, Vertexnode *GL){int i, u, v;int count = 0;//record vertex countEdgenode *e;for (i=0; i{Gl[i].data = i + ' a ';gl[i].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. This is the running result of this demo.Drawing ProcessIt's time to draw a polygon, the HTML, vertex shader, and fragment shader introduced in the previous article (11, shader compilation and connect

the original binary details of the file.Only the/headers dumpbin option can be used for files generated by the/GL compiler option. 2 /ARCHIVEMEMBERS This option displays the minimum information about database Member objects.Only the/headers dumpbin option can be used for files generated by the/GL compiler option. 3 /CLRHEADER file Image files generated by/clr.RemarksCLRHEADER

First of all, there are too few colleagues in OpenGL, especially ndk, in China. There are many problems encountered in this process, and these problems need to be found on the book, on the Internet, on a variety of materials, and the book is called at the java layer, the lack of various file cases on the internet, only by studying at the java layer and finding the required knowledge points in various cases can google search foreign websites solve the problem. Next body -----------------------

/*** Buffer tool class*/Public class bufferutil {/*** Convert a floating point group to a byte Buffer*/Public static bytebuffer arr2bytebuffer (float [] ARR ){Bytebuffer Ibb = bytebuffer. allocatedirect (ARR. length * 4 );Ibb. Order (byteorder. nativeorder ());Floatbuffer fbb = Ibb. asfloatbuffer ();Fbb. Put (ARR );Ibb. Position (0 );Return Ibb;}/*** Convert list to byte Buffer*/Public static bytebuffer list2bytebuffer (list Bytebuffer Ibb = bytebuffer. allocatedirect (list. Size () * 4 );Ibb. O

/** * Entry, triangle */ // Custom Renderer Class myrenderer implements Android. OpenGL. glsurfaceview. Renderer { Private float ratio; // When the surface layer is created Public void onsurfacecreated (gl10 GL, eglconfig config ){ // Set the screen color Gl. glclearcolor (0, 0, 0, 1 ); // Enable the vertex buffer. Gl. glableclientstate (gl10.

] = 1;G-> arc [9] [11] = 1;G-> arc [10] [13] = 1;G-> arc [12] [9] = 1;}/* Construct an adjacent table using the adjacent matrix */Void createalgraph (mgraph g, graphadjlist * GL){Int I, J;Edgenode * E;* GL = (graphadjlist) malloc (sizeof (graphadjlist ));(* GL)-> numvertexes = G. numvertexes;(* GL)-> numedges = G. nume

dumpbin, use the following syntax: DUMPBIN [options] files... Specify one or more binary files and any options required to control information. Dumpbin displays the information to the standard output. You can redirect the output to a file, or use the/out option to specify the file name for the output. When dumpbin is run on the file but no option is specified, dumpbin displays/summary output. When you type a commanddumpbinHowever, when there is no other command line input, dumpbin displays usag

. Whenever a window needs to draw the UI, it calls its associated surface's member function lock to get a canvas, essentially dequeue a graphic Buffer to the Surfaceflinger service. The canvas encapsulates the 2D UI drawing interface provided by Skia and is drawn on top of the graphic buffer previously obtained. After drawing is completed, the Android application process then invokes the previously obtained member function of the canvas unlockandpost the request display is displayed in the scree

performed, however, we are not considering this issue for the moment. The frequency of the second step should be the most important. First, write a simple program to test the consumption caused by this step of transmission. The Code is as follows: Var canvas = document. createElement ('canvas ');Var _ gl = canvas. getContext ('experimental-webgl ');Var vertices = [];For (var I = 0; I Vertices. push (I * Math. random ());}Var buffer = _