#include?“cameraglwidget.h“
#include?
#include?
#include?
#include
struct?VertexData
{
????QVector2D?position;
????QVector2D?texCoord;
};
CameraGLWidget::CameraGLWidget（QWidget?*parent）
????:?QOpenGLWidget（parent）
{


}
CameraGLWidget::~CameraGLWidget（）
{

????arrayBuf.destroy（）;

}
void?CameraGLWidget::resizeGL（int?w?int?h）
{

???glViewport（00wh）;

}
void?CameraGLWidget::paintGL（）
{

????//?Clear?color?and?depth?buffer
????glClear（GL_COLOR_BUFFER_BIT?|?GL_DEPTH_BUFFER_BIT）;

????m_texture->bind（）;
????//?Use?texture?unit?0?which?contains?cube.png
????m_program->setUniformValue（m_textureUniform?0）;

????//?Draw?cube?geometry?using?indices?from?VBO?1
?????glDrawArrays（GL_TRIANGLE_STRIP?0?4）;
}
void?CameraGLWidget::initializeGL（）
{
????initializeOpenGLFunctions（）;

????initShaders（）;

????initTextures（）;

????initBuffArray（）;

}

void?CameraGLWidget::initShaders（）
{
????//Create?QOpenGLShaderProgram
????m_program?=?new?QOpenGLShaderProgram;

????//?Compile?vertex?shader
????m_program->addShaderFromSourceFile（QOpenGLShader::Vertex“GLSL/vshader.glsl“）;

????//?Compile?fragment?shader
????m_program->addShaderFromSourceFile（QOpenGLShader::Fragment“GLSL/fshader.glsl“）;

????//?link?shader?pipeline
????m_program->link（）;

????//?Bind?shader?pipeline?for?use
????m_program->bind（）;

????//Get?identifer?of?Attribute?or?uniform?value?in?vshader.glsl?and?fshader.glsl
????m_vertexAttr?=?m_program->attributeLocation（“vertexIn“）;
????m_textureAttr?=?m_program->attributeLocation（“textureIn“）;
????m_textureUniform?=?m_program->uniformLocation（“texture“）;

}
void?CameraGLWidget::initTextures（）
{
???//?Load??image
????m_texture?=?new?QOpenGLTexture（QImage（“./S40_duplicate.png“）.mirrored（））;

????//?Set?nearest?filtering?mode?for?texture?minification
????m_texture->setMinificationFilter（QOpenGLTexture::Nearest）;

????//?Set?bilinear?filtering?mode?for?texture?magnification
????m_texture->setMagnificationFilter（QOpenGLTexture::Linear）;

????//?Wrap?texture?coordinates?by?repeating
????//?f.ex.?texture?coordinate?（1.1?1.2）?is?same?as?（0.1?0.2）
????m_texture->setWrapMode（QOpenGLTexture::Repeat）;


}

void?CameraGLWidget::?initBuffArray（）
{
?????//?Vertex?data??and?texture?data
????VertexData?vertices[]?=?{

????????{QVector2D（-1.0f?-1.0f）?QVector2D（0.0f?0.0f）}??//?v0
????????{QVector2D（?1.0f?-1.0f）?QVector2D（1.0f?0.0f）}?//?v1
????????{QVector2D（-1.0f??1.0f）?QVector2D（0.0f?1.0f）}??//v2
????????{QVector2D（?1.0f??1.0f）?QVector2D（1.0f?1.0f）}?//?v3
????};

????arrayBuf.create（）;
????arrayBuf.bind（）;
????arrayBuf.allocate（vertices?4?*?sizeof（VertexData））;

????//?Offset?for?position
????quintptr?offset?=?0;

????//?Tell?OpenGL?programmable?pipeline?how?to?locate?vertex?position?data
????m_program->enableAttributeArray（m_vertexAttr）;
????m_program->setAttributeBuffer（m_vertex

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2017-12-05?10:45??OpenglWdtTest\
?????目錄???????????0??2017-12-05?10:17??OpenglWdtTest\GLSL\
?????文件?????????242??2017-12-05?10:07??OpenglWdtTest\GLSL\fshader.glsl
?????文件?????????268??2017-12-05?10:17??OpenglWdtTest\GLSL\vshader.glsl
?????文件???????26338??2017-12-05?10:37??OpenglWdtTest\Makefile
?????文件???????33310??2017-12-05?10:37??OpenglWdtTest\Makefile.Debug
?????文件???????33254??2017-12-05?10:37??OpenglWdtTest\Makefile.Release
?????文件?????????449??2017-12-05?10:37??OpenglWdtTest\OpenglWdtTest.pro
?????文件???????23794??2017-12-05?10:45??OpenglWdtTest\OpenglWdtTest.pro.user
?????文件???????46636??2017-11-21?10:42??OpenglWdtTest\S40_duplicate.png
?????文件????????3392??2017-12-05?10:37??OpenglWdtTest\cameraglwidget.cpp
?????文件?????????854??2017-12-05?10:35??OpenglWdtTest\cameraglwidget.h
?????目錄???????????0??2017-12-05?10:45??OpenglWdtTest\debug\
?????文件???????66048??2017-12-05?10:37??OpenglWdtTest\debug\OpenglWdtTest.exe
?????文件?????3100672??2017-12-05?10:37??OpenglWdtTest\debug\OpenglWdtTest.pdb
?????文件??????190545??2017-12-05?10:35??OpenglWdtTest\debug\mainwindow.obj
?????文件????????2715??2017-12-05?10:35??OpenglWdtTest\debug\moc_mainwindow.cpp
?????文件??????116381??2017-12-05?10:35??OpenglWdtTest\debug\moc_mainwindow.obj
?????文件?????????339??2017-12-04?15:01??OpenglWdtTest\main.cpp
?????目錄???????????0??2017-12-05?10:46??OpenglWdtTest\release\
?????文件??????640066??2017-11-20?11:30??OpenglWdtTest\test.jpg
?????文件????????2192??2017-12-04?16:06??OpenglWdtTest\ui_mainwindow.h