LearnOpenGL（二十）之立方体贴图

#include "myopenglwidget.h" #include <QOpenGLVersionFunctionsFactory> #include "vertices.h" #define timeOutmSec 50 QVector3D viewInitPos(0.0,5.0,25.0); float _near=0.1f,_far=100.0f; QMatrix4x4 model; QMatrix4x4 view; QMatrix4x4 projection; QPoint lastPos; unsigned int skyboxVAO; unsigned int skyboxVBO; MyOpenglWidget::MyOpenglWidget(QWidget *parent) : QOpenGLWidget{parent} { connect(&m_timer,&QTimer::timeout,this,&MyOpenglWidget::on_timeOut); m_timer.start(timeOutmSec); m_time.start(); m_camera.Position = viewInitPos; setFocusPolicy(Qt::StrongFocus); setMouseTracking(true); } MyOpenglWidget::~MyOpenglWidget() { for(auto iter=m_Models.begin();iter!=m_Models.end();iter++) { ModelInfo *modelInfo=&iter.value(); delete modelInfo->model; } } void MyOpenglWidget::loadModel(string path) { static int i = 0; makeCurrent(); Model *_model = new Model(QOpenGLVersionFunctionsFactory::get<QOpenGLFunctions_3_3_Core>(QOpenGLContext::currentContext()), path.c_str()); //m_camera.Position = getCameraInitPos(_model->m_minY,_model->m_maxY); m_Models["张三"+QString::number(i++)]= ModelInfo{_model,QVector3D(0,0,0),0.0,0.0,0.0,false,"张三"}; doneCurrent(); } void MyOpenglWidget::initializeGL() { initializeOpenGLFunctions(); bool success; m_shaderProgram.addShaderFromSourceFile(QOpenGLShader::Vertex,":/shaders/shaders/shapes.vert"); m_shaderProgram.addShaderFromSourceFile(QOpenGLShader::Fragment,":/shaders/shaders/shapes.frag"); success=m_shaderProgram.link(); if(!success) qDebug()<<"ERR:"<<m_shaderProgram.log(); m_skyBoxShaderProgram.addShaderFromSourceFile(QOpenGLShader::Vertex,":/shaders/shaders/skybox.vert"); m_skyBoxShaderProgram.addShaderFromSourceFile(QOpenGLShader::Fragment,":/shaders/shaders/skybox.frag"); success=m_skyBoxShaderProgram.link(); if(!success) qDebug()<<"ERR:"<<m_skyBoxShaderProgram.log(); m_refractionShaderProgram.addShaderFromSourceFile(QOpenGLShader::Vertex,":/shaders/shaders/refraction.vert"); m_refractionShaderProgram.addShaderFromSourceFile(QOpenGLShader::Fragment,":/shaders/shaders/refraction.frag"); success=m_refractionShaderProgram.link(); if(!success) qDebug()<<"ERR:"<<m_refractionShaderProgram.log(); m_BoxDiffuseTex=new QOpenGLTexture(QImage(":/images/images/container2.png").mirrored()); m_PlaneDiffuseTex=new QOpenGLTexture(QImage(":/images/images/wall.jpg").mirrored()); m_CubeMap=new QOpenGLTexture(QOpenGLTexture::TargetCubeMap); QImage _right = QImage(":/images/images/skybox/right.jpg").convertToFormat(QImage::Format_RGB888); QImage _left = QImage(":/images/images/skybox/left.jpg").convertToFormat(QImage::Format_RGB888); QImage _top = QImage(":/images/images/skybox/top.jpg").convertToFormat(QImage::Format_RGB888); QImage _bottom = QImage(":/images/images/skybox/bottom.jpg").convertToFormat(QImage::Format_RGB888); QImage _front = QImage(":/images/images/skybox/front.jpg").convertToFormat(QImage::Format_RGB888); QImage _back = QImage(":/images/images/skybox/back.jpg").convertToFormat(QImage::Format_RGB888); m_CubeMap->setSize(_right.width(), _right.height()); m_CubeMap->setFormat(QOpenGLTexture::RGBFormat); m_CubeMap->allocateStorage(QOpenGLTexture::RGB, QOpenGLTexture::UInt8); m_CubeMap->setData(0, 0, QOpenGLTexture::CubeMapPositiveX,QOpenGLTexture::RGB, QOpenGLTexture::UInt8, (const void *)_right.bits()); m_CubeMap->setData(0, 0, QOpenGLTexture::CubeMapNegativeX,QOpenGLTexture::RGB, QOpenGLTexture::UInt8, (const void *)_left.bits()); m_CubeMap->setData(0, 0, QOpenGLTexture::CubeMapPositiveY,QOpenGLTexture::RGB, QOpenGLTexture::UInt8, (const void *)_top.bits()); m_CubeMap->setData(0, 0, QOpenGLTexture::CubeMapNegativeY,QOpenGLTexture::RGB, QOpenGLTexture::UInt8, (const void *)_bottom.bits()); m_CubeMap->setData(0, 0, QOpenGLTexture::CubeMapPositiveZ,QOpenGLTexture::RGB, QOpenGLTexture::UInt8, (const void *)_front.bits()); m_CubeMap->setData(0, 0, QOpenGLTexture::CubeMapNegativeZ,QOpenGLTexture::RGB, QOpenGLTexture::UInt8, (const void *)_back.bits()); m_CubeMap->setMinificationFilter(QOpenGLTexture::Linear); //纹理放大或缩小时，像素的取值方法 ，线性或就近抉择 m_CubeMap->setMagnificationFilter(QOpenGLTexture::Linear); m_CubeMap->setWrapMode(QOpenGLTexture::DirectionS, QOpenGLTexture::ClampToEdge); //设置纹理边缘的扩展方法 m_CubeMap->setWrapMode(QOpenGLTexture::DirectionT, QOpenGLTexture::ClampToEdge); // m_CubeMap->setWrapMode(QOpenGLTexture::DirectionR, QOpenGLTexture::ClampToEdge); // skybox VAO glGenVertexArrays(1, &skyboxVAO); glGenBuffers(1, &skyboxVBO); glBindVertexArray(skyboxVAO); glBindBuffer(GL_ARRAY_BUFFER, skyboxVBO); glBufferData(GL_ARRAY_BUFFER, sizeof(skyboxVertices), &skyboxVertices, GL_STATIC_DRAW); glEnableVertexAttribArray(0); glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(float), (void*)0); m_PlaneMesh = processMesh(planeVertices,6,m_PlaneDiffuseTex->textureId()); } void MyOpenglWidget::resizeGL(int w, int h) { Q_UNUSED(w); Q_UNUSED(h); } void MyOpenglWidget::paintGL() { model.setToIdentity(); view.setToIdentity(); projection.setToIdentity(); //float time=m_time.elapsed()/50.0; projection.perspective(m_camera.Zoom,(float)width()/height(),_near,_far); view=m_camera.GetViewMatrix(); glClearColor(0.2f, 0.3f, 0.3f, 1.0f); glEnable(GL_DEPTH_TEST); glDepthFunc(GL_LESS); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); m_shaderProgram.bind(); //m_shaderProgram.setUniformValue("light.position",lightPos); m_shaderProgram.setUniformValue("viewPos",m_camera.Position); m_shaderProgram.setUniformValue("projection", projection); m_shaderProgram.setUniformValue("view", view); //model.rotate(1.0f, 1.0f, 1.0f, 0.5f); m_shaderProgram.setUniformValue("model", model); // light properties, note that all light colors are set at full intensity m_shaderProgram.setUniformValue("light.ambient", 0.7f, 0.7f, 0.7f); m_shaderProgram.setUniformValue("light.diffuse", 0.9f, 0.9f, 0.9f); m_shaderProgram.setUniformValue("light.specular", 1.0f, 1.0f, 1.0f); // material properties m_shaderProgram.setUniformValue("material.shininess", 32.0f); m_shaderProgram.setUniformValue("light.direction", -0.2f, -1.0f, -0.3f); m_PlaneMesh->Draw(m_shaderProgram); m_refractionShaderProgram.bind(); m_refractionShaderProgram.setUniformValue("viewPos",m_camera.Position); m_refractionShaderProgram.setUniformValue("projection", projection); m_refractionShaderProgram.setUniformValue("view", view); foreach(auto modelInfo,m_Models) { model.setToIdentity(); model.translate(modelInfo.worldPos); model.rotate(modelInfo.pitch,QVector3D(1.0,0.0,0.0)); model.rotate(modelInfo.yaw,QVector3D(0.0,1.0,0.0)); model.rotate(modelInfo.roll,QVector3D(0.0,0.0,1.0)); m_refractionShaderProgram.setUniformValue("model", model); modelInfo.model->Draw(m_refractionShaderProgram); } // draw skybox as last glDepthFunc(GL_LEQUAL); // 确保天空盒=1也能通过测试 m_skyBoxShaderProgram.bind(); QMatrix4x4 skyboxView=view;// remove translation from the view matrix skyboxView.setColumn(3,QVector4D(0.0f,0.0f,0.0f,1.0f)); m_skyBoxShaderProgram.setUniformValue("projection", projection); m_skyBoxShaderProgram.setUniformValue("view", skyboxView); // skybox cube glBindVertexArray(skyboxVAO); glActiveTexture(GL_TEXTURE0); glBindTexture(GL_TEXTURE_CUBE_MAP, m_CubeMap->textureId()); glDrawArrays(GL_T