Question

我正在尝试使用OpenGl功能在C ++中绘制一个实体立方体，但我想在所需的位置绘制它，例如glVertex3f(20,5,-35)。如何在给定位置绘制实心立方体？

Answer 1

glTranslatef（x，y，z）。谷歌它，我认为也有2D版本。但这会将参考帧从堆栈中转换出来。如果需要设置更复杂的转换，则需要调用glpopmatrix和glpushmatrix。小心拼写和使用它们。

Answer 2

要匹配您的问题并在OpenGL（兼容性配置文件）中绘制多维数据集，您可以使用以下代码：

    void drawCube(float x, float y, float z) 
    {
    glBegin(GL_QUADS); 
    glVertex3f(-1.0f+x, -1.0f+y, -1.0f+z);
    glVertex3f(1.0f+x, -1.0f+y, -1.0f+z);
    glVertex3f(1.0f+x, 1.0f+y, -1.0f+z);
    glVertex3f(-1.0f+x, 1.0f+y, -1.0f+z);

    glVertex3f(-1.0f+x, -1.0f+y, -1.0f+z);
    glVertex3f(-1.0f+x, -1.0f+y, 1.0f+z);
    glVertex3f(-1.0f+x, 1.0f+y, -1.0f+z);
    glVertex3f(-1.0f+x, 1.0f+y, 1.0f+z);

    glVertex3f(-1.0f+x, -1.0f+y, -1.0f+z);
    glVertex3f(-1.0f+x, -1.0f+y, 1.0f+z);
    glVertex3f(1.0f+x, -1.0f+y, 1.0f+z);
    glVertex3f(1.0f+x, -1.0f+y, -1.0f+z);

    glVertex3f(-1.0f+x, -1.0f+y, 1.0f+z);
    glVertex3f(1.0f+x, -1.0f+y, 1.0f+z);
    glVertex3f(1.0f+x, 1.0f+y, 1.0f+z);
    glVertex3f(-1.0f+x, 1.0f+y, 1.0f+z);

    glVertex3f(-1.0f+x, -1.0f+y, 1.0f+z);
    glVertex3f(1.0f+x, -1.0f+y, 1.0f+z);
    glVertex3f(1.0f+x, 1.0f+y, 1.0f+z);
    glVertex3f(-1.0f+x, 1.0f+y, 1.0f+z);

    glVertex3f(-1.0f+x, 1.0f+y, -1.0f+z);
    glVertex3f(-1.0f+x, 1.0f+y, 1.0f+z);
    glVertex3f(1.0f+x, 1.0f+y, 1.0f+z);
    glVertex3f(1.0f+x, 1.0f+y, -1.0f+z);

    glEnd();
     }

我不建议使用此功能，而是使用另一个答案中描述的glTranslatef(x, y, z)解决方案。喜欢这个功能：

    void drawCube(float x, float y, float z) 
    {
        glPushMatrix();
        glTranslatef(x, y, z);

        glBegin(GL_QUADS); 
        glVertex3f(-1.0f,-1.0f ,-1.0f);
        glVertex3f(1.0f, -1.0f, -1.0f);
        glVertex3f(1.0f, 1.0f, -1.0f);
        glVertex3f(-1.0f, 1.0f, -1.0f);

        glVertex3f(-1.0f, -1.0f, -1.0f);
        glVertex3f(-1.0f, -1.0f, 1.0f);
        glVertex3f(-1.0f, 1.0f, -1.0f);
        glVertex3f(-1.0f, 1.0f, 1.0f);

        glVertex3f(-1.0f, -1.0f, -1.0f);
        glVertex3f(-1.0f, -1.0f, 1.0f);
        glVertex3f(1.0f, -1.0f, 1.0f);
        glVertex3f(1.0f, -1.0f, -1.0f);

        glVertex3f(-1.0f, -1.0f, 1.0f);
        glVertex3f(1.0f, -1.0f, 1.0f);
        glVertex3f(1.0f, 1.0f, 1.0f);
        glVertex3f(-1.0f, 1.0f, 1.0f);

        glVertex3f(-1.0f,-1.0f ,1.0f );
        glVertex3f(1.0f, -1.0f, 1.0f);
        glVertex3f(1.0f, 1.0f, 1.0f);
        glVertex3f(-1.0f, 1.0f, 1.0f);

        glVertex3f(-1.0f, 1.0f, -1.0f);
        glVertex3f(-1.0f, 1.0f, 1.0f);
        glVertex3f(1.0f, 1.0f, 1.0f);
        glVertex3f(1.0f, 1.0f, -1.0f);
        glEnd();

        glPopMatrix();
    }

这个功能远非完美，但它应该足够了。快乐的编码！

C ++中的OpenGl Solid Cube

2 个答案: