public void setViewPort(float left, float right, float bottom, float top) {
        this.viewPortLeft = left;
        this.viewPortRight = right;
        this.viewPortBottom = bottom;
        this.viewPortTop = top;
        onViewPortChange();
    }
Sets the boundaries of the viewport.

@param left the left boundary of the viewport (&lt;right, default: 0)
@param right the right boundary of the viewport (&gt;left, default: 1)
@param bottom the bottom boundary of the viewport (&lt;top, default: 0)
@param top the top boundary of the viewport (&gt;bottom, default: 1)
jme3-core/src/main/java/com/jme3/renderer/Camera.java