Method push

modeller/code/trackball.py:195–214

(self)

    def push(self):
        viewport = gl.glGetIntegerv(gl.GL_VIEWPORT)
        gl.glMatrixMode(gl.GL_PROJECTION)
        gl.glPushMatrix()
        gl.glLoadIdentity ()
        aspect = viewport[2]/float(viewport[3])
        aperture = 35.0
        near = 0.1
        far = 100.0
        top = math.tan(aperture*3.14159/360.0) * near * self._zoom
        bottom = -top
        left = aspect * bottom
        right = aspect * top
        gl.glFrustum (left, right, bottom, top, near, far)
        gl.glMatrixMode (gl.GL_MODELVIEW)
        gl.glPushMatrix()
        gl.glLoadIdentity ()
        # gl.glTranslate (0.0, 0, -self._distance)
        gl.glTranslate (self._x, self._y, -self._distance)
        gl.glMultMatrixf (self._matrix)

    def pop(void):
        gl.glMatrixMode(gl.GL_MODELVIEW)