シェルスクリプトをインタラクションフリー化する4つの方法

glMatrixMode(GL_MODELVIEW); // The value of mode can be: GL_MODELVIEW, GL_PROJECTION or GL_TEXTURE. glMatrixMode(GL_MODELVIEW); // Whether the model view matrix, projection matrix or texture matrix needs to be modified.

glLoadIdentity();

glTranslate*: multiplies the current matrix with a matrix representing the moving object. The three parameters represent the displacement values at each of the three coordinates.
glRotate*: Multiplies the current matrix with a matrix representing a rotated object. The object will be rotated counterclockwise around a line from (0,0,0) to (x,y,z), and the parameter angle indicates the angle of rotation.
glScale*: multiply the current matrix with a matrix representing the scaled object. x,y,z represent the scaling in that direction respectively.

glMatrixMode(GL_PROJECTION);

glLoadIdentity();

void glFrustum(GLdouble left, GLdouble Right, GLdouble bottom, GLdouble top, GLdouble near, GLdouble far);

void mydisplay (void)
{
     ......
    glMatrixMode (GL_PROJECTION);
    LoadIdentity ();
    Frustum (left, right, bottom, top, near, far);
    ......
}