72 lines
1.9 KiB
Text
72 lines
1.9 KiB
Text
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/**
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* PANDA 3D SOFTWARE
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* Copyright (c) Carnegie Mellon University. All rights reserved.
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*
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* All use of this software is subject to the terms of the revised BSD
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* license. You should have received a copy of this license along
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* with this source code in a file named "LICENSE."
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*
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* @file scissorEffect.I
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* @author drose
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* @date 2008-07-30
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*/
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/**
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* Returns true if the ScissorEffect is a screen-based effect, meaning
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* get_frame() has a meaningful value, but get_a() and get_b() do not.
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*/
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INLINE bool ScissorEffect::
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is_screen() const {
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return _screen;
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}
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/**
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* If is_screen() returns true, this method may be called to query the screen-
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* based scissor frame. This is a series of left, right, bottom, top,
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* representing the scissor frame relative to the current DisplayRegion. See
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* ScissorAttrib.
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*/
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INLINE const LVecBase4 &ScissorEffect::
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get_frame() const {
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return _frame;
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}
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/**
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* Returns the number of node-based scissor points. See get_point().
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*/
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INLINE int ScissorEffect::
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get_num_points() const {
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return (int)_points.size();
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}
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/**
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* If is_screen() returns false, then get_num_points() and get_point() may be
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* called to query the node-based scissor frame. These return n points (at
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* least two), which are understood to be in the space of this node, and which
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* define any opposite corners of the scissor frame.
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*/
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INLINE const LPoint3 &ScissorEffect::
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get_point(int n) const {
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nassertr(n >= 0 && n < (int)_points.size(), LPoint3::zero());
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return _points[n]._p;
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}
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/**
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* Returns the node to which the nth point is relative, or empty NodePath to
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* indicate the current node.
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*/
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INLINE NodePath ScissorEffect::
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get_node(int n) const {
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nassertr(n >= 0 && n < (int)_points.size(), NodePath());
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return _points[n]._node;
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}
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/**
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* Returns true if this ScissorEffect actually enables scissoring, or false if
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* it culls only.
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*/
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INLINE bool ScissorEffect::
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get_clip() const {
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return _clip;
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}
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