LearnOpenGL（十六）之模板测试

#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; 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_SingleColorShaderProgram.addShaderFromSourceFile(QOpenGLShader::Vertex,":/shaders/shaders/shapes.vert"); m_SingleColorShaderProgram.addShaderFromSourceFile(QOpenGLShader::Fragment,":/shaders/shaders/singleColor.frag"); success=m_SingleColorShaderProgram.link(); if(!success) qDebug()<<"ERR:"<<m_SingleColorShaderProgram.log(); m_BoxDiffuseTex=new QOpenGLTexture(QImage(":/images/images/container2.png").mirrored()); m_PlaneDiffuseTex=new QOpenGLTexture(QImage(":/images/images/wall.jpg").mirrored()); 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); glEnable(GL_STENCIL_TEST); glStencilOp(GL_KEEP, GL_KEEP, GL_REPLACE); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT); glStencilMask(0x00); 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_SingleColorShaderProgram.bind(); m_SingleColorShaderProgram.setUniformValue("projection", projection); m_SingleColorShaderProgram.setUniformValue("view", view); m_SingleColorShaderProgram.release(); foreach(auto modelInfo,m_Models) { //将需要渲染的片段的模板测试缓冲值设为1 glStencilFunc(GL_ALWAYS, 1, 0xFF); glStencilMask(0xFF); 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_shaderProgram.bind(); m_shaderProgram.setUniformValue("model", model); modelInfo.model->Draw(m_shaderProgram); m_shaderProgram.release(); if(!modelInfo.isSelected) continue; //第二次渲染渲染模板值不为1的地方 glStencilFunc(GL_NOTEQUAL, 1, 0xFF); glStencilMask(0x00); m_SingleColorShaderProgram.bind(); float height=modelInfo.model->m_maxY-modelInfo.model->m_minY; float width=modelInfo.model->m_maxX-modelInfo.model->m_minX; if(modelInfo.model->m_minY>=0) model.translate(0.0f,height/2,0.0f); model.scale(1.1f,1.0+0.1*(width/height)); if(modelInfo.model->m_minY>=0) model.translate(0.0f,-height/2,0.0f); m_SingleColorShaderProgram.setUniformValue("model", model); modelInfo.model->Draw(m_SingleColorShaderProgram); m_SingleColorShaderProgram.release(); glStencilMask(0xFF); } } void MyOpenglWidget::on_timeOut() { update(); } QVector3D MyOpenglWidget::getCameraInitPos(float min, float max) { QVector3D temp={0.0,0.0,0.0}; float height=max-min; temp.setZ(1.5*height); if(min>=0) temp.setY(height/2.0); viewInitPos=temp; return temp; } Mesh *MyOpenglWidget::processMesh(float *vertices, int size, unsigned int textureId) { vector<Vertex> _vertices; vector<unsigned int> _indices; vector<Texture> _textures; //memcpy(&_vertices[0],vertices,5*size*sizeof(float)); for(int i=0;i<size;i++){ Vertex vert; vert.Position[0]=vertices[i*5+0]; vert.Position[1]=vertices[i*5+1]; vert.Position[2]=vertices[i*5+2]; vert.TexCoords[0]=vertices[i*5+3]; vert.TexCoords[1]=vertices[i*5+4]; _vertices.push_back(vert); _indices.push_back(i); } Texture tex; tex.id=textureId; tex.type="texture_diffuse"; _textures.push_back(tex); return new Mesh(QOpenGLVersionFunctionsFactory::get<QOpenGLFunctions_3_3_Core>(QOpenGLContext::currentContext()) ,_vertices,_indices,_textures); } QVector4D MyOpenglWidget::worldPostionFromViewPort(int posX, int posY) { float winZ; glReadPixels( posX, this->height()-posY ,1,1 ,GL_DEPTH_COMPONENT,GL_FLOAT ,&winZ); float x=(2.0f*posX)/this->width()-1.0f; float y=1.0f-(2.0f*posY)/this->height(); float z=winZ*2.0-1.0f; float w = (2.0 * _near * _far) / (_far + _near - z * (_far - _near)); QVector4D wolrdPostion(x,y,z,1); wolrdPostion=w*wolrdPostion; return view.inverted()*projection.inverted()*wolrdPostion; } void MyOpenglWidget::mouseMoveEvent(QMouseEvent *event) { makeCurrent(); if(m_modelMoving){ for(QMap<QString, ModelInfo>::iterator iter=m_Models.begin(); iter!=m_Models.end();iter++){ ModelInfo *modelInfo=&iter.value(); if(!modelInfo->isSelected) continue; modelInfo->worldPos= QVector3D(worldPostionFromViewPort(event->pos().x(),event->pos().y())); } }else { if(event->buttons() & Qt::RightButton || event->buttons() & Qt::LeftButton || event->buttons() & Qt::MiddleButton){ auto currentPos=event->pos(); QPoint deltaPos=currentPos-lastPos; lastPos=currentPos; if(