opengl functions tutorial

Set glsl This section describes how to configure glsl in OpenGL. Assume that you have written vertex shader and pixel shader. If you are not ready, you can obtain the relevant content from the following URL: Http://www.3dshaders.com/home/ Http://www.opengl.org/sdk/tools/ShaderDesigner/ Http://developer.amd.com/archive/gpu/rendermonkey/pages/default.aspx In OpenGL, the shader of glsl uses a process similar t

Simple and transparent The vast majority of effects in OpenGL are related to some types of (color) mixing. The definition of the mixed color is to combine the color of a certain pixel with the color of the corresponding pixel that has been drawn on the screen. How to combine these two colors depends on the component values of the alpha channel of the color and/or the mixed color function used. Alpha is usually the 4th color component at the end of the

Lesson 1Texture ing of graphic fonts: In this lesson, we will create a font with a texture based on the previous lesson, which is really simple.After publishing the first two tutorials on Bitmap fonts and contour fonts, I have received many emails. Many readers want to know how to assign texture maps to fonts. You can use the automatic texture coordinate generator. It generates texture coordinates for each polygon in the font.A small comment. This code is specially written for windows. It uses t

GLUTTutorial Animation So far, we have an OpenGL window with a white triangle, but it is not exciting at all. Now let's go to this tutorial to rotate the triangle. Let's go back to the main () function and add some additional settings. First, tell glut that we want a dual-buffer. The dual buffer creates a smooth animation by painting in the latter buffer and constantly switching the front and back buf

The size of the point defaults to 1 pixels, but it can also be changed. The changed command is glpointsize, and its function prototype is as follows:void Glpointsize (glfloat size);Size must be greater than 0.0f and the default value is 1.0f, in pixels.Note: For specific OpenGL implementations, there is a limit to the size of the point, and if you set a size that exceeds the maximum value, the setting may haveProblem.Examplevoid Mydisplay (void){Glcle

1. OpenGL development Environment Construction Reference http://brothergrup.iteye.com/blog/16024712. Fill the color of the triangle:The Fill color function for Glcolor (3/4) * (R,G,B) 3 or 4 means that the numeric type rgb/rgba;* represents Rgba (B,i.) will eventually be mapped to [0-1].How to map is to take the value of the Write/current type maximum value such as Byte is -128~127 glcolor3b (1,0,0) equivalent to glcolor3f (1/127f,0,0) less than 0 whe

; // increase the rotation variable of the triangle (new)Rquad-= 0.15f; // reduce the rotation variable of the Quadrilateral (new)Return true; // continue running} This lesson is over again. Now you have mastered how to create objects in 3D space. The OpenGL screen must be imagined as a large drawing paper with many transparent layers. It is almost a cube composed of a large number of points. These points are filled with cubes from left to ri

OpenGL Tutorial Translator 13th lesson camera SpaceOriginal Address: http://ogldev.atspace.co.uk/(source code please download from the original page)BackgroundIn the last few sections we see two types of vertex transformations. The first type of transformation is to change the position of the object (pan), rotate, dimension (indent). These transformations allow us to place an object anywhere in the 3D world

Original post address: http://ogldev.atspace.co.uk/www/tutorial06/tutorial06.html In this tutorial, we start to change the position of a 3D object, such as translation, rotation, scaling, and so on. The operations of object location changes are usually implemented through matrices. Each change is represented by a matrix. If an object performs multiple location operations, the corresponding matrices can be multiplied, multiply the coordinates of the v

ambient during coloring. We still use the familiar per vertex shading method. Define the spotlight in vert: //baisc.vert#version 400layout (location = 0) in vec3 VertexPosition; layout (location = 1) in vec3 VertexNormal; out vec3 LightIntensity;struct SpotLightInfo{vec4 position;vec3 direction;vec3 intensity;float exponent;float cutoff;};struct MaterialInfo{vec3 Ka;vec3 Kd;vec3 Ks;float Shininess;};uniform SpotLightInfo Spot;uniformMaterialInfo Material;uniform mat4 ModelViewMatrix;uniform

Nehe OpenGL tutorial (Chinese and English versions with VC ++ source code) Lesson 01-Lesson 02 Create an OpenGL window: How to Create a triangle and a quadrilateral Http://ieee.org.cn/dispbbs.asp? Boardid = 61 id = 53679 Lesson 03-Lesson 04Add colorRotateHttp://ieee.org.cn/dispbbs.asp? Boardid = 61 id = 53682 Lesson 05-Lesson 063D spaceTexture in

If you have a pThread.h not found error when you use Cmake-g Xcode-wno-dev opengl_tutorial, it happens that you and I use the same version of the 2.8 cmake.Then try the Brew install CMake to install the latest version of the 3.0.2 CMake.OpenGL Tutorial Resources:first go to the URL [1], download the source code, unzip and use Cmake-g Xcode-wno-dev./opengl_tutorial generate the Xcode project file.Then you can watch the

Brief Introduction The Nehe tutorial introduces the extended (Arb_multisample) Multiple sampling techniques for OpenGL in this lesson. With this technique, full-screen anti-aliasing can be achieved. This will make the graphic look more beautiful. In OSG, multiple sampling is opened and closed as stateset of nodes, and the implementation process is very simple. Implement First add quadrilateral to the scene