Qt之OpenGL纹理单元

着色器代码

//顶点着色器
#version 330 core
layout(location=0) in vec3 aPos;//顶点布局
layout(location=1) in vec3 aColor;//颜色布局
layout(location=2) in vec2 aTexCoord;//纹理布局
uniform float xOffset;
out vec4 vertexColor;
out vec3 ourPosition;
out vec2 TexCoord;
void main()
{

    gl_Position=vec4(aPos.x+xOffset,aPos.y,aPos.z,1.0f);//定点坐标
    vertexColor=vec4(aColor,1.0f);//颜色
    TexCoord=aTexCoord;//纹理
}
//片段着色器
#version 330 core
out vec4 FragColor;
in vec4 vertexColor;//
in vec3 ourPosition;
in vec2 TexCoord;
uniform sampler2D textureWall;
uniform sampler2D textureWall2;
void main()
{
    FragColor=mix(texture(textureWall2,TexCoord),texture(textureWall,TexCoord),0.5)*vertexColor;
}

cpu中代码

#include "sunopengl.h"

#include 

sunOpengl::sunOpengl(QWidget *parent)
{

}
unsigned int VBO,VAO;
float vertices[]={
    0.5f, 0.5f,  0.0f, 1.0f, 0.0f, 0.0f,1.0f,1.0f,
    0.5f, -0.5f, 0.0f, 0.0f, 1.0f, 0.0f,1.0f,0.0f,
    -0.5f,-0.5f, 0.0f, 0.0f, 0.0f, 1.0f,0.0f,0.0f,
    -0.5f,0.5f, 0.0f,  0.5f, 0.5f, 0.5f,0.0f,1.0f
};

unsigned int indices[]={
    0,1,3,
    1,2,3,
};
unsigned int EBO;
sunOpengl::~sunOpengl()
{
    delete textureWall;
    makeCurrent();
    glDeleteVertexArrays(1,&VAO);
    glDeleteBuffers(1,&VBO);
    glDeleteBuffers(1,&EBO);
    //glDeleteProgram(shaderProgram);
    doneCurrent();
}
void sunOpengl::initializeGL()
{
    this->initializeOpenGLFunctions();
    shaderProgram.addShaderFromSourceFile(QOpenGLShader::Vertex,":/shades/shapes.vert");
    shaderProgram.addShaderFromSourceFile(QOpenGLShader::Fragment,":/shades/shapes.frag");


    bool success=shaderProgram.link();
    if(!success)
    {
        qDebug()<bind(0);
    textureWall2->bind(1);
    if(!isDraw)
        return;
    glBindVertexArray(VAO);
   // glDrawArrays(GL_TRIANGLES,0,6);
    glDrawElements(ShapeType,6,GL_UNSIGNED_INT,0);
    glBindVertexArray(0);

}

void sunOpengl::drawrectangle()
{
    ShapeType=GL_TRIANGLES;
    isDraw=true;
    update();
}

void sunOpengl::setPloygonMode(bool isWire)
{
    makeCurrent();
    if(isWire)
    {
        glPolygonMode(GL_FRONT_AND_BACK,GL_LINE);
    }
    else
    {
        glPolygonMode(GL_FRONT_AND_BACK,GL_FILL);
    }
    doneCurrent();
    update();
}

void sunOpengl::clear()
{
    isDraw=false;
    update();
}
//定点着色器-》几何着色-》图元装配-》光栅化-》片段着色器-》测试与混合

图片显示效果