LearnOpenGL（十一）之光源

#include "myopenglwidget.h" #define timeOutmSec 50 float vertices[] = { // positions // normals // texture coords -0.5f, -0.5f, -0.5f, 0.0f, 0.0f, -1.0f, 0.0f, 0.0f, 0.5f, -0.5f, -0.5f, 0.0f, 0.0f, -1.0f, 1.0f, 0.0f, 0.5f, 0.5f, -0.5f, 0.0f, 0.0f, -1.0f, 1.0f, 1.0f, 0.5f, 0.5f, -0.5f, 0.0f, 0.0f, -1.0f, 1.0f, 1.0f, -0.5f, 0.5f, -0.5f, 0.0f, 0.0f, -1.0f, 0.0f, 1.0f, -0.5f, -0.5f, -0.5f, 0.0f, 0.0f, -1.0f, 0.0f, 0.0f, -0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f, 1.0f, 0.0f, 0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f, 0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f, -0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f, -0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, -0.5f, 0.5f, 0.5f, -1.0f, 0.0f, 0.0f, 1.0f, 0.0f, -0.5f, 0.5f, -0.5f, -1.0f, 0.0f, 0.0f, 1.0f, 1.0f, -0.5f, -0.5f, -0.5f, -1.0f, 0.0f, 0.0f, 0.0f, 1.0f, -0.5f, -0.5f, -0.5f, -1.0f, 0.0f, 0.0f, 0.0f, 1.0f, -0.5f, -0.5f, 0.5f, -1.0f, 0.0f, 0.0f, 0.0f, 0.0f, -0.5f, 0.5f, 0.5f, -1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.5f, 0.5f, 0.5f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.5f, 0.5f, -0.5f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f, 0.5f, -0.5f, -0.5f, 1.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.5f, -0.5f, -0.5f, 1.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.5f, -0.5f, 0.5f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.5f, 0.5f, 0.5f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, -0.5f, -0.5f, -0.5f, 0.0f, -1.0f, 0.0f, 0.0f, 1.0f, 0.5f, -0.5f, -0.5f, 0.0f, -1.0f, 0.0f, 1.0f, 1.0f, 0.5f, -0.5f, 0.5f, 0.0f, -1.0f, 0.0f, 1.0f, 0.0f, 0.5f, -0.5f, 0.5f, 0.0f, -1.0f, 0.0f, 1.0f, 0.0f, -0.5f, -0.5f, 0.5f, 0.0f, -1.0f, 0.0f, 0.0f, 0.0f, -0.5f, -0.5f, -0.5f, 0.0f, -1.0f, 0.0f, 0.0f, 1.0f, -0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f, 0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f, 0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f, -0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, -0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f }; QVector3D cubePositions[] = { QVector3D( 0.0f, 0.0f, 0.0f), QVector3D( 2.0f, 5.0f, -15.0f), QVector3D(-1.5f, -2.2f, -2.5f), QVector3D(-3.8f, -2.0f, -12.3f), QVector3D( 2.4f, -0.4f, -3.5f), QVector3D(-1.7f, 3.0f, -7.5f), QVector3D( 1.3f, -2.0f, -2.5f), QVector3D( 1.5f, 2.0f, -2.5f), QVector3D( 1.5f, 0.2f, -1.5f), QVector3D(-1.3f, 1.0f, -1.5f) }; const float PI = 3.1415926; unsigned int VAO,VBO,lightVAO; QVector3D lightPos(1.2f, 1.0f, 2.0f); QVector3D lightColor(1.0f, 1.0f, 1.0f); QVector3D objectColor(1.0f, 0.5f, 0.31f); QVector3D viewInitPos(0.0,0.0,5.0); 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); } MyOpenglWidget::~MyOpenglWidget() { makeCurrent(); glDeleteBuffers(1,&VBO); glDeleteVertexArrays(1,&VAO); glDeleteVertexArrays(1,&lightVAO); doneCurrent(); } void MyOpenglWidget::initializeGL() { initializeOpenGLFunctions(); //创建VBO和VAO对象，并赋予ID glGenVertexArrays(1, &VAO); glGenBuffers(1, &VBO); //绑定VBO和VAO对象 glBindVertexArray(VAO); glBindBuffer(GL_ARRAY_BUFFER, VBO); //为当前绑定到target的缓冲区对象创建一个新的数据存储。 //如果data不是NULL，则使用来自此指针的数据初始化数据存储 glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW); //告知显卡如何解析缓冲里的属性值 glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void*)0); //开启VAO管理的第一个属性值 glEnableVertexAttribArray(0); glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void*)(3*sizeof(float))); //开启VAO管理的第二个属性值 glEnableVertexAttribArray(1); glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void*)(6*sizeof(float))); //开启VAO管理的第二个属性值 glEnableVertexAttribArray(2); glGenVertexArrays(1, &lightVAO); glBindVertexArray(lightVAO); // we only need to bind to the VBO, the container's VBO's data already contains the data. glBindBuffer(GL_ARRAY_BUFFER, VBO); // set the vertex attribute glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void*)0); glEnableVertexAttribArray(0); 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_diffuseTex = new QOpenGLTexture(QImage(":/images/images/container2.png").mirrored()); m_specularTex = new QOpenGLTexture(QImage(":/images/images/container2_specular.png").mirrored()); m_shaderProgram.bind(); m_shaderProgram.setUniformValue("material.diffuse", 0); m_shaderProgram.setUniformValue("material.specular", 1); m_lightShaderProgram.addShaderFromSourceFile(QOpenGLShader::Vertex,":/shaders/shaders/light.vert"); m_lightShaderProgram.addShaderFromSourceFile(QOpenGLShader::Fragment,":/shaders/shaders/light.frag"); success=m_lightShaderProgram.link(); if(!success) qDebug()<<"ERR:"<<m_lightShaderProgram.log(); } void MyOpenglWidget::resizeGL(int w, int h) { Q_UNUSED(w); Q_UNUSED(h); } void MyOpenglWidget::paintGL() { QMatrix4x4 model; QMatrix4x4 view; QMatrix4x4 projection; float time=m_time.elapsed()/50.0; projection.perspective(m_camera.Zoom,(float)width()/height(),0.1,100); view=m_camera.GetViewMatrix(); glClearColor(0.2f, 0.3f, 0.3f, 1.0f); glEnable(GL_DEPTH_TEST); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); m_shaderProgram.bind(); m_shaderProgram.setUniformValue("projection", projection); m_shaderProgram.setUniformValue("view", view); m_shaderProgram.setUniformValue("light.position", m_camera.Position); m_shaderProgram.setUniformValue("light.direction", m_camera.Front); m_shaderProgram.setUniformValue("light.cutOff", (float)cos(12.5f*PI/180)); m_shaderProgram.setUniformValue("light.outerCutOff", (float)cos(17.5f*PI/180)); m_shaderProgram.setUniformValue("viewPos",m_camera.Position); model.rotate(time, 1.0f, 5.0f, 0.5f); //m_shaderProgram.setUniformValue("model", model); // light properties, note that all light colors are set at full intensity m_shaderProgram.setUniformValue("light.ambient", 0.4f, 0.4f, 0.4f); 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.constant", 1.0f); m_shaderProgram.setUniformValue("light.linear", 0.09f); m_shaderProgram.setUniformValue("light.quadratic", 0.032f); glBindVertexArray(VAO); m_diffuseTex->bind(0); m_specularTex->bind(1); for(unsigned int i = 0; i < 10; i++) { QMatrix4x4 model; model.translate(cubePositions[i]); float angle = 20.0f * i; model.rotate(angle, QVector3D(1.0f, 0.3f, 0.5f)); m_shaderProgram.setUniformValue("model", model); glDrawArrays(GL_TRIANGLES, 0, 36); } m_lightShaderProgram.bind();