opengl sample

= (v2-v0); n = Cross (U, v); if (length (n) W0 = Origin-v0; A =-dot (n, W0); b = Dot (n, direction); if (ABS (b) Float UU, UV, VV, Wu, WV, D;UU = dot (u, u); UV = dot (u, v); VV = dot (V, v); W = point-v0; Wu = dot (w, u); WV = Dot (w, v); D = UV * Uv-uu * VV;float s, t;s = (UV * WV-VV * wu)/D; if (S Post-collision reflection vector calculation VEC3 reflect_vector (vec3 V, vec3 N) { return v-2.0 * DOT (V, N) * n;} nbsp; void Main (void) { VEC3 accelleration = vec3 (0.

into an initialization function, and write the drawing function in the callback function.The full source codeC 123456789101112131415161718192021222324252627282930 #include voidInitial(void){Glclearcolor(1.0f,1.0f,1.0f,1.0f);Glmatrixmode(gl_projection);gluortho2d(0.0,200.0,0.0,150.0);}void Display(void){Glclear(Gl_color_buffer_bit);glcolor3f(1.0f,0.0f,0.0f);GLRECTF(50.0f,100.0f,150.0f,50.0f);Glflush();}int Main(intargc,Char *argv[]){Glutinit(argc,argv);Glutinitdisplaymode(Glut_s

1. Reverse sampling When a non-horizontal and non-vertical straight line or polygon boundary is drawn on a Raster Graphic Display, a more or less jagged or tiered appearance is displayed. This is because the straight line, polygon, and color boundary are continuous, and the grating is composed of discrete points. It represents a straight line and polygon on the grating display device and must be sampled in a discrete position. Due to the information distortion caused by inadequate sampling recon

Because the computer generates images from discrete points, there must be a gap between the generated images and the real scenes. This gap is manifested in: straight line or smooth curved surface, pattern loss of the original color shape, the disappearance of small objects in the screen, etc. All are called examples ). Reverse sampling can reduce this situation. A rough assumption is to fill the Sawtooth part of the original boundary with a low saturation point, which does not affect the overall

This article illustrates the Android triangle on Glsurfaceview based on OpenGL and the use of projection and camera view methods. Share to everyone for your reference, specific as follows: Defining triangles OpenGL allows us to use three-dimensional coordinates to define an object. Before we draw a triangle, we need to define the coordinates of its various points. We typically use arrays to store the coor

Since the original book of the OpenGL ES 2.0 Programming Guide does not provide the sample code for the 12th chapter, the code in the book only mentions the key steps, and most of the Web is an example of the Android/ios version, most of which are based on OpenGL or OpenGL ES 3.0, in order to deepen understanding, so t

out!!!Then draw the square:// Draw a square gl.glloadidentity (); Gl.gltranslatef (1.5f0.0f,-6.0f); // gl.glcolor4f (1.0f, 0.0f, 0.0f, 1.0f); Gl.glvertexpointer (3004); Gl.glfinish ();Note that the Color:gl.glColorPointer (4, gl10.gl_float, 0, Mcolorbuffer) have been loaded before the triangle was drawn;If you call Gl.gldisableclientstate (Gl10.gl_color_array) after drawing, you can see that the triangles are flashing and the squares are not visible . This piece is also a misunderstanding! If y

not including the external wing system. The first part of this article describes how to use OpenGL ES on the Android platform through the software development kit (SDK) or Android Native Development Tool Kit (NDK), and how to determine the method to choose. This section also describes the OpenGL ES sample applications in various sdks and NDK, as well as Java * n

3.1. OpenGL functions in Windows NT As described in the previous chapter, OpenGL in Windows NT also contains more than 100 library functions. These functions are named in a certain format, that is, each function starts with GL. In addition to basic OpenGL functions, OpenGL in Windows NT also supports the following four

This article is the second part of the two sections, discussing the obstacles to porting OpenGL games to Google Android. Before you start a game implant project (including differences in OpenGL extensions, floating point support, texture compression formats, and the GLU Library), you should recognize these obstacles. It also describes how to use OpenGL ES to set

determine whether an extension is supported by the previous function.Sample codeLet's end this lesson with a sample code.We select an extension gl_arb_window_pos that is currently supported by most graphics cards to illustrate how to use Glee to invoke OpenGL extension functionality. Usually when we draw pixels, we need to use the glrasterpos* function to specify where to draw. However, the glrasterpos* fu

In this section, let's take a brief look at OpenGL.(1) OpenGL Overview:OpenGL (Open graphics Library) is a professional graphics program interface that defines a cross-programming language, cross-platform programming interface specification. It is used for three-dimensional image (two-dimensional also), is a powerful, easy to call the bottom three-dimensional graphics processing library, is also the industr

Introducing State Machines Glbegin () and Glend () Glflush () and Glfinish () OpenGL Introduction OpenGL is a software interface for graphics hardware. It is designed as a hardware-independent interface that can run on a variety of different hardware platforms. OpenGL programs can also work across networks (in the form of client-server), even if the client and

AbstractPreviously, we discussed the issue in the Windows nc-greenpli line. If you want to perform PLI in Linux nc-greenpli, some places are not exactly the same ‧ IntroductionThe differences between Windows and Linux nc-OpenGL are as follows: First, Windows uses Visual C ++ 6.0 kernel, and Linux uses GCC kernel. Second: windows and Linux have the same design path. Fortunately, if you use the standard C statement to modify PLI, you can skip windows p

The GL Library in OpenGL is the core library, Glu is a utility library, glut is a utility library, GL is the core, Glu is part of the package for GL, glut is OpenGL's cross-platform tool Library, GL contains the most basic 3D functions, and Glu seems to support GL, if the arithmetic is good, The same effect can be done without the glu of the case. Glut is the basic window interface, is independent of GL and Glu, if you do not like to use glut can use

Multiple sampling in OpenGL and multiple sampling in OpenGLMultiple sampling in OpenGLOne of the biggest advantages of anti-sawtooth processing is that it can make the edge of the polygon smoother and make the rendering effect more realistic and natural. Point-and-line anti-sawtooth processing is widely supported, but unfortunately, the smooth processing of polygon is not implemented on all platforms. In addition, even when GL_POLYGON_SMOOTH can be us

Wgl–windows OpenGL Expansion Layer The WGL extension consists of a set of functions (Wglcreatecontext, Wgldeletecontext etc.) and structures (such as Pixelfo Rmatdescriptor, glyphmetricsfloat) etc. Thus every OpenGL implementation has a platform-specific portion which has to is set up and used according to the Particul AR platform. Device context The Windows graphical Device Interface (GDI) is capable of

1 OpenGL basics 1.1 What is OpenGL OpenGL is called Open graphics language. It refers to open graphical program interfaces. It is a cross-platform standard used for 3D rendering and 3D addition. In other words, OpenGL is a 3D API, it is an important communication bridge between 3D accelerator card hardware and 3D graph

1, based on VC + + WIN32+CUDA+OPENGL combination of remote sensing image displayIn this combination scenario, OpenGL is set to the following two ways when initialized, with the same effect// setting mode 1glutinitdisplaymode (glut_double | GLUT_RGBA); // setting Mode 2glutinitdisplaymode (glut_double | GLUT_RGB);Extracting the pixel data from the remote sensing image data, the R, G, and b three channels ca

#include "stdafx.h" #include #include #include #define Freeglut_static #include #pragma COMMENT (linker, "/nodefaultlib:libc.lib") #define BUFFER_OFFSET (offset) ((const glubyte *) NULL + (offset)) #define XStart-0.8 #define XEND 0.8 #define