Android OpenGL ES plotting tutorial 3: Drawing GraphicsAfter defining the shapes to be drawn by OpenGL, you certainly want to draw them. Using OpenGL ES 2.0 to draw a graph may require more code than you think, because the API provides a large number of graphic rendering pip
understand, now just need to know that this function can showwindow, and wait for the window to close before returning, which is enough. )In the Glutdisplayfunc function, we set the "Call Mydisplay function when drawing is required." So the Mydisplay function isUsed for drawing. Observe the three function calls in Mydisplay and find that they all start with GL. This function, starting with GL, is OpenGL.Standard functions, the functions used are described below.
straight lineA point is painted as true, and if 0, the factor points that should be drawn on the line will be painted as virtual.Here are some examples:Disclaimer: The picture is from www.opengl.org, which is the drawing of the book "OpenGL Programming Guide", due to the old version of the book (first edition,1994) is already circulating in the network, I hope not to touch the copyright issue.Example code:void Mydisplay (void){Glclear (Gl_color_buffe
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This chapter begins to learn how to use shader. In the past, many people often used OpenGL fixed pipelines to do some programs. shader is rarely used, while modern GPU programming and shader applications are indispensable. Although shader programming is used, A little more code, but more flexible.
The shader pipeline diagram of Open
creator3.1.1 + freeglut3(For the configuration process, refer to the previous blog)
Correction 1: As in the previous tutorial, it is the most basic correction. Basically, the code of each tutorial must be corrected with error 1.
Correction 2: the first three tutorials only need to be corrected by correction
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When light is projected onto an object, a shadow is generated on an object such as the ground or wall. In computer graphics, there are many technologies that can produce shadows. In this tutorial, we will learn the most common shadow mapping technology.
The problem of shadow in OpenGL can be summarized as: how to determine wh
, Glu, aux, respectively, that the function belongs to the OpenGL Core Library, the utility library or the auxiliary library:1) OpenGL Core Library functions: 100+, with GL as the prefix, used to build a variety of geometric models, coordinate transformation, produce lighting effects, texture mapping, produce atomization effect, such as all the two and three-dime
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
What is 1,opengl? OpenGL (Full-write 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-level graphics library.What 2,
has its strengths and weaknesses (see table 1 ). This document does not describe any of the four methods. There are only two ways to transplant OpenGL code from other platforms: the SDK package class for OpenGL ES and the NDK that can be used to develop OpenGL ES in C/C ++. For the other two methods, the SDK Canvas ap
OpenGL rendering Pipeline
OpenGL first receives the user-provided geometry data (vertices and geometry) and enters it into a series of shader stages for processing, including vertex coloring, subdivision coloring (which itself contains two shaders), and the final geometry coloring, which is then fed into the rasterization unit (rasterizer). The Rasterization unit is responsible for Tu Yuanshong the metadat
graphics rendering pipelines, I recommend Durian software related articles the graphics Pipeline chapter.What did the shaders actually do? It depends on what kind of shader.Vertex ShadersVertex shader is mainly used to transform points (x, y, z coordinates) into different points. Vertices are just a point in the geometry, a point called Vectex, and multiple points called vertices (pronounced Ver-tuh-seez). In this tutorial, our triangles need three v
make OpenGL good performance, they had to make comprehensive modifications to the API; in the Core Specification of OpenGL 2.0 pure, they plan to delete outdated and redundant feature features, leaving only the features that best fit the current mainstream hardware architecture, so that developers can slowly move from the old OpenGL
;} Lock Column
If the fixed column function is enabled, frozen: True. The check box column is locked by default. you can remove it by setting the frozencheckbox parameter.
Frozencheckbox:False
Related Events
If you do not know how to use the event, refer
Jquery ligerui getting started
Jquery ligerui tutorial table (1)
Multiple Headers
If columns is configured as a tree, it can be changed t
PHPMySQL 3-3 (1 ). 1. welcome to the third and last course of this tutorial. If you have learned the first and second lessons, you have mastered the basic functions for installing and programming MySQL and PHP.
Welcome to the third and last course of this
glbindtexture (gl_texture_2d, _textureid);Specifies the value of the uniform variable for the current program object, and Parameter 1 represents the new value used (Gl_texture1) gluniform1i (_textureslot, 1);Draws a texture in the specified area.Note: The coordinate representation used to represent the texture range differs from the Uikit and OpenGL coordinates,
memory or AGP memory because the data should be easily accessible.
Glbuffersubdataarb ()
Similar to Glbufferdataarb (), Glbuffersubdataarb () is used to copy data into VBO, but it only copies part of the data into the buffer that already exists, starting at the given offset. (The total size of the buffer must be set using the Glbufferdataarb () before using Glbuffersubdataarb ())
Gldeletebuffersarb ()
You can use the Gldeletebuffersarb () function to delete one or more vbo that are
, 0, // bottom right1, 1 // top right};
Note: We use glshort instead of glfloat. Add the above Code to your project.
Look, is this similar to our texture array?
Now we need to modify the drawing code. You do not need to draw the code of the triangle, but directly start with the code of the rectangle. The code for drawing a new rectangle is as follows:
Glloadidentity ();Glcolor4f (1.0, 1.0, 1.0, 1.0); // newGltranslatef (1.5, 0.0,-6.0 );Glrotatef (Rota
1. Configure the OpenGL environment to download glut (OpenGL utility Toolkit) https://www.opengl.org/resources/libraries/glut/to Local. After decompression there are two Lib files, two DLL files and one. h file.2. Glut.lib and Glut32.lib are copied to X:\Program Files (x86) \microsoft Visual Studio 12.0\vc\lib.3. Glut.
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