How to fix errors QOpenGLShader: Unable to open file "shaders/vertexshader1.vsh" QOpenGLShader: Unable to open file "shaders/fragmentshader1.fsh"?

Question

Qt

Good day to all, please tell me why, when starting the program, qt gives out that the shaders (vertex and fragment) do not open and how to fix it?
here are my sources:
project structure

- mainwindow.h -

#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMatrix4x4>
#include <QMainWindow>
#include <QGLWidget>
#include <QOpenGLWidget>
#include <QOpenGLShaderProgram>
#include "QOpenGLTexture"
#include "QOpenGLBuffer"
#include <QVector3D>
QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
QT_END_NAMESPACE

struct Vertexofcube {
    Vertexofcube(){

    }
    Vertexofcube(QVector3D p, QVector2D t, QVector3D n):
    position(p), textureposition(t), normal(n)
    {

    }

    QVector3D position;
    QVector2D textureposition;
    QVector3D normal;
};
class MainWindow : public QOpenGLWidget
{
    Q_OBJECT

public slots:
     void FixedPaint();

public:
    MainWindow(QWidget *parent = nullptr);
    ~MainWindow();
    int nWidth ,nHeight; // Размеры окна нашей программы
    void initializeGL(); // Метод для инициализирования opengl
    void resizeGL(int nWidth, int nHeight); // Метод вызываемый после каждого изменения размера окна
    void paintGL(); // Метод для вывода изображения на экран
    void initCube();
    void initShaders();
    float width;
    float x,y,z;
protected:

  QOpenGLBuffer ArrayBuffer1, IndexBuffer1;
  QOpenGLTexture *texture1;
  QOpenGLShaderProgram shaderprogram;
  QMatrix4x4 projectionmatrix;

private:
    Ui::MainWindow *ui;
};
#endif // MAINWINDOW_H

mainwindow.cpp-

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QMatrix4x4>

void MainWindow::FixedPaint()
{

}

MainWindow::MainWindow(QWidget *parent)
    : QOpenGLWidget(parent)
    ,IndexBuffer1(QOpenGLBuffer::IndexBuffer), texture1(0)
{


}

void MainWindow::initializeGL()
{
    glClearColor(0.0,0.0,0.0,1);
    glViewport( 0, 0, nWidth, nHeight );
            glLoadIdentity();
    glEnable(GL_DEPTH_TEST);
    glEnable(GL_CULL_FACE);
    initShaders();
    initCube();
    shaderprogram.link();
}

void MainWindow::resizeGL(int nWidth, int nHeight)
{
    float aspect = nWidth / (float)nHeight;
    projectionmatrix.setToIdentity();
    projectionmatrix.perspective(45, aspect, 0.1, 10);
}

void MainWindow::paintGL()
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    QMatrix4x4 modelViewMatrix;
    modelViewMatrix.setToIdentity();
    modelViewMatrix.translate(0.0f, 0.0f, -5.0f);

    texture1->bind(0);

    //m_shaderProgramm.bind();
    shaderprogram.setUniformValue("MVPMatrix", projectionmatrix * modelViewMatrix);
    shaderprogram.setUniformValue("qt_Texture0", 0);


    // Bind buffers
    ArrayBuffer1.bind();
    IndexBuffer1.bind();

    int offset = 0;

    int location = shaderprogram.attributeLocation("a_position");
    shaderprogram.enableAttributeArray(location);
    shaderprogram.setAttributeBuffer(location, GL_FLOAT, offset, 3, sizeof(Vertexofcube));

    offset += sizeof(QVector3D);

    location = shaderprogram.attributeLocation("a_textcoord0");
    shaderprogram.enableAttributeArray(location);
    shaderprogram.setAttributeBuffer(location, GL_FLOAT, offset, 2, sizeof(Vertexofcube));



    glDrawElements(GL_TRIANGLES, IndexBuffer1.size(), GL_UNSIGNED_INT, 0);
    shaderprogram.link();

}

void MainWindow::initCube()
{
    float width_div_2 =  1.0f;
    QVector<Vertexofcube> vertexes;
    // Top side
    vertexes.append(Vertexofcube(QVector3D(width_div_2, width_div_2, width_div_2), QVector2D(0.0f, 1.0f), QVector3D(0.0f, 1.0f, 0.0f)));
    vertexes.append(Vertexofcube(QVector3D(width_div_2, width_div_2, -width_div_2), QVector2D(0.0f, 0.0f), QVector3D(0.0f, 1.0f, 0.0f)));
    vertexes.append(Vertexofcube(QVector3D(-width_div_2, width_div_2, width_div_2), QVector2D(1.0f, 1.0f), QVector3D(0.0f, 1.0f, 0.0f)));
    vertexes.append(Vertexofcube(QVector3D(-width_div_2, width_div_2, -width_div_2), QVector2D(1.0f, 0.0f), QVector3D(0.0f, 1.0f, 0.0f)));


    // Down side
    vertexes.append(Vertexofcube(QVector3D(-width_div_2, -width_div_2, width_div_2), QVector2D(0.0f, 1.0f), QVector3D(0.0f, -1.0f, 0.0f)));
    vertexes.append(Vertexofcube(QVector3D(-width_div_2, -width_div_2, -width_div_2), QVector2D(0.0f, 0.0f), QVector3D(0.0f, -1.0f, 0.0f)));
    vertexes.append(Vertexofcube(QVector3D(width_div_2, -width_div_2, width_div_2), QVector2D(1.0f, 1.0f), QVector3D(0.0f, -1.0f, 0.0f)));
    vertexes.append(Vertexofcube(QVector3D(width_div_2, -width_div_2, -width_div_2), QVector2D(1.0f, 0.0f), QVector3D(0.0f, -1.0f, 0.0f)));

    // Left side
    vertexes.append(Vertexofcube(QVector3D(-width_div_2, width_div_2, width_div_2), QVector2D(0.0f, 1.0f), QVector3D(-1.0f, 0.0f, 0.0f)));
    vertexes.append(Vertexofcube(QVector3D(-width_div_2, width_div_2, -width_div_2), QVector2D(0.0f, 0.0f), QVector3D(-1.0f, 0.0f, 0.0f)));
    vertexes.append(Vertexofcube(QVector3D(-width_div_2, -width_div_2, width_div_2), QVector2D(1.0f, 1.0f), QVector3D(-1.0f, 0.0f, 0.0f)));
    vertexes.append(Vertexofcube(QVector3D(-width_div_2, -width_div_2, -width_div_2), QVector2D(1.0f, 0.0f), QVector3D(-1.0f, 0.0f, 0.0f)));

    // Right side
    vertexes.append(Vertexofcube(QVector3D(width_div_2, width_div_2, width_div_2), QVector2D(0.0f, 1.0f), QVector3D(1.0f, 0.0f, 0.0f)));
    vertexes.append(Vertexofcube(QVector3D(width_div_2, -width_div_2, width_div_2), QVector2D(0.0f, 0.0f), QVector3D(1.0f, 0.0f, 0.0f)));
    vertexes.append(Vertexofcube(QVector3D(width_div_2, width_div_2, -width_div_2), QVector2D(1.0f, 1.0f), QVector3D(1.0f, 0.0f, 0.0f)));
    vertexes.append(Vertexofcube(QVector3D(width_div_2, -width_div_2, -width_div_2), QVector2D(1.0f, 0.0f), QVector3D(1.0f, 0.0f, 0.0f)));

    // Front side
    vertexes.append(Vertexofcube(QVector3D(-width_div_2, width_div_2, width_div_2), QVector2D(0.0f, 1.0f), QVector3D(0.0f, 0.0f, 1.0f)));
    vertexes.append(Vertexofcube(QVector3D(-width_div_2, -width_div_2, width_div_2), QVector2D(0.0f, 0.0f), QVector3D(0.0f, 0.0f, 1.0f)));
    vertexes.append(Vertexofcube(QVector3D(width_div_2, width_div_2, width_div_2), QVector2D(1.0f, 1.0f), QVector3D(0.0f, 0.0f, 1.0f)));
    vertexes.append(Vertexofcube(QVector3D(width_div_2, -width_div_2, width_div_2), QVector2D(1.0f, 0.0f), QVector3D(0.0f, 0.0f, 1.0f)));

    // Back side
    vertexes.append(Vertexofcube(QVector3D(width_div_2, width_div_2, -width_div_2), QVector2D(0.0f, 1.0f), QVector3D(0.0f, 0.0f, -1.0f)));
    vertexes.append(Vertexofcube(QVector3D(width_div_2, -width_div_2, -width_div_2), QVector2D(0.0f, 0.0f), QVector3D(0.0f, 0.0f, -1.0f)));
    vertexes.append(Vertexofcube(QVector3D(-width_div_2, width_div_2, -width_div_2), QVector2D(1.0f, 1.0f), QVector3D(0.0f, 0.0f, -1.0f)));
    vertexes.append(Vertexofcube(QVector3D(-width_div_2, -width_div_2, -width_div_2), QVector2D(1.0f, 0.0f), QVector3D(0.0f, 0.0f, -1.0f)));

    QVector <GLuint> indexes;
    for(int i=0; i<24; i+=4){
      indexes.append(0 + i);
      indexes.append(1 + i);
      indexes.append(2 + i);
      indexes.append(2 + i);
      indexes.append(1 + i);
      indexes.append(3 + i);

    }
    ArrayBuffer1.create();
    ArrayBuffer1.bind();
    ArrayBuffer1.allocate(vertexes.constData(), vertexes.size() * sizeof(Vertexofcube));
    ArrayBuffer1.release();

    IndexBuffer1.create();
    IndexBuffer1.bind();
    IndexBuffer1.allocate(vertexes.constData(), vertexes.size() * sizeof(GLuint));
    IndexBuffer1.release();



    texture1 = new QOpenGLTexture(QImage("textures/travka.png").mirrored());

    texture1->setMinificationFilter(QOpenGLTexture::Nearest);
    texture1->setMagnificationFilter(QOpenGLTexture::Linear);
    texture1->setWrapMode(QOpenGLTexture::Repeat);
}

void MainWindow::initShaders()
{
  if (!shaderprogram.addShaderFromSourceFile(QOpenGLShader::Vertex,"shaders/vertexshader1.vsh")){
      close();
  }
  if (!shaderprogram.addShaderFromSourceFile(QOpenGLShader::Fragment,"shaders/fragmentshader1.fsh")){
      close();
  }
  if (!shaderprogram.link()){
      close();
  }
  if (!shaderprogram.bind())
      close();

}


MainWindow::~MainWindow()
{
    delete ui;
}

Answer 1

Most likely a problem with the paths. Specify the full path to the vertexshader1.vsh, shaders/fragmentshader1.fsh files