C++中的OpenGl實體立方體

Question

我想用OpenGl功能在C++中繪製一個堅實的立方體，但是我想將它繪製在期望的位置，例如glVertex3f(20,5,-35)。我如何在給定的位置繪製一個立方體？

Answer 1

glTranslatef（x，y，z）。谷歌它，我認爲也有2D版本。但是這會將參考幀轉換爲堆棧。如果需要設置更復雜的轉換，則需要調用glpopmatrix和glpushmatrix。小心拼寫和使用這些。

Answer 2

要匹配你的問題，並在OpenGL（兼容性配置文件），你可以使用此代碼來繪製一個立方體：

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(); 
    } 

我不推薦這個功能，使用替代glTranslatef(x, y, z)解決discribed在另一個答案。喜歡這個功能：

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(); 
    } 

這個功能還不夠完美，但它應該足夠了。快樂的編碼！