NeHe-OpenGL-Qt5-Lesson05-注釋與學習-SolidObjects

三維效果，就比較容易了，隻要是在頂點資料為立方體就行了

效果：

代碼：

void PolygonWindow::initGeometry()
{   
    glGenBuffers(4, &m_vboIds[0]);
    // 繪制金字塔
    GLfloat triangleVertices[] = {
        0.0f, 1.0f, 0.0f,
        -1.0f,-1.0f, 1.0f,
        1.0f,-1.0f, 1.0f,
        0.0f, 1.0f, 0.0f,
        1.0f,-1.0f, 1.0f,
        1.0f,-1.0f, -1.0f,
        0.0f, 1.0f, 0.0f,
        1.0f,-1.0f, -1.0f,
        -1.0f,-1.0f, -1.0f,
        0.0f, 1.0f, 0.0f,
        -1.0f,-1.0f,-1.0f,
        -1.0f,-1.0f, 1.0f
    };
    glBindBuffer(GL_ARRAY_BUFFER, m_vboIds[0]);
    glBufferData(GL_ARRAY_BUFFER, sizeof(triangleVertices), triangleVertices, GL_STATIC_DRAW);

    GLfloat triangleColors[] = {
        1.0f,0.0f,0.0f,
        0.0f,1.0f,0.0f,
        0.0f,0.0f,1.0f,
        1.0f,0.0f,0.0f,
        0.0f,0.0f,1.0f,
        0.0f,1.0f,0.0f,
        1.0f,0.0f,0.0f,
        0.0f,1.0f,0.0f,
        0.0f,0.0f,1.0f,
        1.0f,0.0f,0.0f,
        0.0f,0.0f,1.0f,
        0.0f,1.0f,0.0f
    };
    glBindBuffer(GL_ARRAY_BUFFER, m_vboIds[1]);
    glBufferData(GL_ARRAY_BUFFER, sizeof(triangleColors), triangleColors, GL_STATIC_DRAW);

    // 繪制立方體
    GLfloat quadVertices[] = {
        // Front face
        -1.0f, 1.0f, 1.0f,
        -1.0f, -1.0f, 1.0f,
        1.0f, 1.0f, 1.0f,
        -1.0f, -1.0f, 1.0f,
        1.0f, -1.0f, 1.0f,
        1.0f, 1.0f, 1.0f,

         // Right face
        1.0f, 1.0f, 1.0f,
        1.0f, -1.0f, 1.0f,
        1.0f, 1.0f, -1.0f,
        1.0f, -1.0f, 1.0f,
        1.0f, -1.0f, -1.0f,
        1.0f, 1.0f, -1.0f,

        // Back face
        1.0f, 1.0f, -1.0f,
        1.0f, -1.0f, -1.0f,
        -1.0f, 1.0f, -1.0f,
        1.0f, -1.0f, -1.0f,
        -1.0f, -1.0f, -1.0f,
        -1.0f, 1.0f, -1.0f,

        // Left face
        -1.0f, 1.0f, -1.0f,
        -1.0f, -1.0f, -1.0f,
        -1.0f, 1.0f, 1.0f,
        -1.0f, -1.0f, -1.0f,
        -1.0f, -1.0f, 1.0f,
        -1.0f, 1.0f, 1.0f,

        // Top face
        -1.0f, 1.0f, -1.0f,
        -1.0f, 1.0f, 1.0f,
        1.0f, 1.0f, -1.0f,
        -1.0f, 1.0f, 1.0f,
        1.0f, 1.0f, 1.0f,
        1.0f, 1.0f, -1.0f,

        // Bottom face
        1.0f, -1.0f, -1.0f,
        1.0f, -1.0f, 1.0f,
        -1.0f, -1.0f, -1.0f,
        1.0f, -1.0f, 1.0f,
        -1.0f, -1.0f, 1.0f,
        -1.0f, -1.0f, -1.0f,
    };
    glBindBuffer(GL_ARRAY_BUFFER, m_vboIds[2]);
    glBufferData(GL_ARRAY_BUFFER, sizeof(quadVertices), quadVertices, GL_STATIC_DRAW);

    GLfloat quadColors[] = {
        // Front face (red)
        1.0f, 0.0f, 0.0f, 1.0f,
        1.0f, 0.0f, 0.0f, 1.0f,
        1.0f, 0.0f, 0.0f, 1.0f,
        1.0f, 0.0f, 0.0f, 1.0f,
        1.0f, 0.0f, 0.0f, 1.0f,
        1.0f, 0.0f, 0.0f, 1.0f,

        // Right face (green)
        0.0f, 1.0f, 0.0f, 1.0f,
        0.0f, 1.0f, 0.0f, 1.0f,
        0.0f, 1.0f, 0.0f, 1.0f,
        0.0f, 1.0f, 0.0f, 1.0f,
        0.0f, 1.0f, 0.0f, 1.0f,
        0.0f, 1.0f, 0.0f, 1.0f,
        // Back face (blue)
        0.0f, 0.0f, 1.0f, 1.0f,
        0.0f, 0.0f, 1.0f, 1.0f,
        0.0f, 0.0f, 1.0f, 1.0f,
        0.0f, 0.0f, 1.0f, 1.0f,
        0.0f, 0.0f, 1.0f, 1.0f,
        0.0f, 0.0f, 1.0f, 1.0f,
        // Left face (yellow)
        1.0f, 1.0f, 0.0f, 1.0f,
        1.0f, 1.0f, 0.0f, 1.0f,
        1.0f, 1.0f, 0.0f, 1.0f,
        1.0f, 1.0f, 0.0f, 1.0f,
        1.0f, 1.0f, 0.0f, 1.0f,
        1.0f, 1.0f, 0.0f, 1.0f,

        // Top face (cyan)
        0.0f, 1.0f, 1.0f, 1.0f,
        0.0f, 1.0f, 1.0f, 1.0f,
        0.0f, 1.0f, 1.0f, 1.0f,
        0.0f, 1.0f, 1.0f, 1.0f,
        0.0f, 1.0f, 1.0f, 1.0f,
        0.0f, 1.0f, 1.0f, 1.0f,

        // Bottom face (magenta)
        1.0f, 0.0f, 1.0f, 1.0f,
        1.0f, 0.0f, 1.0f, 1.0f,
        1.0f, 0.0f, 1.0f, 1.0f,
        1.0f, 0.0f, 1.0f, 1.0f,
        1.0f, 0.0f, 1.0f, 1.0f,
        1.0f, 0.0f, 1.0f, 1.0f,
    };
    glBindBuffer(GL_ARRAY_BUFFER, m_vboIds[3]);
    glBufferData(GL_ARRAY_BUFFER, sizeof(quadColors), quadColors, GL_STATIC_DRAW);
}
           

多謝，親愛的美美。