108 lines
2.9 KiB
C++
108 lines
2.9 KiB
C++
/**
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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 scissorAttrib.h
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* @author drose
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* @date 2008-07-29
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*/
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#ifndef SCISSORATTRIB_H
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#define SCISSORATTRIB_H
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#include "pandabase.h"
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#include "renderAttrib.h"
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#include "luse.h"
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class FactoryParams;
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/**
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* This restricts rendering to within a rectangular region of the scene,
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* without otherwise affecting the viewport or lens properties. Geometry that
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* falls outside the scissor region is not rendered. It is akin to the OpenGL
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* glScissor() function.
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*
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* The ScissorAttrib always specifies its region relative to its enclosing
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* DisplayRegion, in screen space, and performs no culling.
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*
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* See ScissorEffect if you wish to define a region relative to 2-D or 3-D
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* coordinates in the scene graph, with culling.
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*/
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class EXPCL_PANDA_PGRAPH ScissorAttrib : public RenderAttrib {
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private:
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ScissorAttrib(const LVecBase4 &frame);
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PUBLISHED:
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static CPT(RenderAttrib) make_off();
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INLINE static CPT(RenderAttrib) make(PN_stdfloat left, PN_stdfloat right, PN_stdfloat bottom, PN_stdfloat top);
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static CPT(RenderAttrib) make(const LVecBase4 &frame);
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static CPT(RenderAttrib) make_default();
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INLINE bool is_off() const;
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INLINE const LVecBase4 &get_frame() const;
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PUBLISHED:
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MAKE_PROPERTY(frame, get_frame);
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public:
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virtual void output(std::ostream &out) const;
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protected:
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virtual int compare_to_impl(const RenderAttrib *other) const;
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virtual size_t get_hash_impl() const;
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virtual CPT(RenderAttrib) compose_impl(const RenderAttrib *other) const;
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private:
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LVecBase4 _frame;
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bool _off;
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static CPT(RenderAttrib) _off_attrib;
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PUBLISHED:
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static int get_class_slot() {
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return _attrib_slot;
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}
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virtual int get_slot() const {
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return get_class_slot();
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}
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MAKE_PROPERTY(class_slot, get_class_slot);
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public:
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static void register_with_read_factory();
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virtual void write_datagram(BamWriter *manager, Datagram &dg);
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protected:
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static TypedWritable *make_from_bam(const FactoryParams ¶ms);
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void fillin(DatagramIterator &scan, BamReader *manager);
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public:
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static TypeHandle get_class_type() {
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return _type_handle;
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}
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static void init_type() {
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RenderAttrib::init_type();
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register_type(_type_handle, "ScissorAttrib",
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RenderAttrib::get_class_type());
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ScissorAttrib *attrib = new ScissorAttrib(LVecBase4(0, 1, 0, 1));
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attrib->_off = true;
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_attrib_slot = register_slot(_type_handle, 100, attrib);
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}
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virtual TypeHandle get_type() const {
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return get_class_type();
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}
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virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
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private:
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static TypeHandle _type_handle;
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static int _attrib_slot;
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};
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#include "scissorAttrib.I"
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#endif
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