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alphaTestAttrib.h
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1/**
2 * PANDA 3D SOFTWARE
3 * Copyright (c) Carnegie Mellon University. All rights reserved.
4 *
5 * All use of this software is subject to the terms of the revised BSD
6 * license. You should have received a copy of this license along
7 * with this source code in a file named "LICENSE."
8 *
9 * @file alphaTestAttrib.h
10 * @author drose
11 * @date 2002-03-04
12 */
13
14#ifndef ALPHATESTATTRIB_H
15#define ALPHATESTATTRIB_H
16
17#include "pandabase.h"
18#include "renderAttrib.h"
19
20 class FactoryParams;
21
22/**
23 * Enables or disables writing of pixel to framebuffer based on its alpha
24 * value relative to a reference alpha value
25 */
26 class EXPCL_PANDA_PGRAPH AlphaTestAttrib : public RenderAttrib {
27 private:
28 INLINE AlphaTestAttrib(PandaCompareFunc mode = M_always,
29 PN_stdfloat reference_alpha = 1.0f);
30
31PUBLISHED:
32 static CPT(RenderAttrib) make(PandaCompareFunc mode,
33 PN_stdfloat reference_alpha);
34 static CPT(RenderAttrib) make_default();
35
36 INLINE PN_stdfloat get_reference_alpha() const;
37 INLINE PandaCompareFunc get_mode() const;
38
39PUBLISHED:
40 MAKE_PROPERTY(reference_alpha, get_reference_alpha);
41 MAKE_PROPERTY(mode, get_mode);
42
43 public:
44 virtual void output(std::ostream &out) const;
45
46 protected:
47 virtual int compare_to_impl(const RenderAttrib *other) const;
48 virtual size_t get_hash_impl() const;
49
50 private:
51 PandaCompareFunc _mode;
52 PN_stdfloat _reference_alpha; // should be in range [0.0-1.0]
53
54PUBLISHED:
55 static int get_class_slot() {
56 return _attrib_slot;
57 }
58 virtual int get_slot() const {
59 return get_class_slot();
60 }
61 MAKE_PROPERTY(class_slot, get_class_slot);
62
63 public:
64 static void register_with_read_factory();
65 virtual void write_datagram(BamWriter *manager, Datagram &dg);
66
67 protected:
68 static TypedWritable *make_from_bam(const FactoryParams &params);
69 void fillin(DatagramIterator &scan, BamReader *manager);
70
71 public:
72 static TypeHandle get_class_type() {
73 return _type_handle;
74 }
75 static void init_type() {
76 RenderAttrib::init_type();
77 register_type(_type_handle, "AlphaTestAttrib",
78 RenderAttrib::get_class_type());
79 _attrib_slot = register_slot(_type_handle, 100, new AlphaTestAttrib);
80 }
81 virtual TypeHandle get_type() const {
82 return get_class_type();
83 }
84 virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
85
86 private:
87 static TypeHandle _type_handle;
88 static int _attrib_slot;
89};
90
91#include "alphaTestAttrib.I"
92
93#endif
alphaTestAttrib.I
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
AlphaTestAttrib::get_reference_alpha
get_reference_alpha
Returns the alpha reference value.
Definition alphaTestAttrib.h:40
AlphaTestAttrib::make
static ConstPointerTo< RenderAttrib > make(PandaCompareFunc mode, PN_stdfloat reference_alpha)
Constructs a new AlphaTestAttrib object.
Definition alphaTestAttrib.cxx:30
AlphaTestAttrib::get_mode
get_mode
Returns the alpha write mode.
Definition alphaTestAttrib.h:41
AlphaTestAttrib::make_default
static ConstPointerTo< RenderAttrib > make_default()
Returns a RenderAttrib that corresponds to whatever the standard default properties for render attrib...
Definition alphaTestAttrib.cxx:41
FactoryParams
An instance of this class is passed to the Factory when requesting it to do its business and construc...
Definition factoryParams.h:36
RenderAttrib::write_datagram
virtual void write_datagram(BamWriter *manager, Datagram &dg)
Writes the contents of this object to the datagram for shipping out to a Bam file.
Definition renderAttrib.cxx:527
RenderAttrib::register_slot
static int register_slot(TypeHandle type_handle, int sort, RenderAttrib *default_attrib)
Adds the indicated TypeHandle to the registry, if it is not there already, and returns a unique slot ...
Definition renderAttrib.I:101
pandabase.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
register_type
void register_type(TypeHandle &type_handle, const std::string &name)
This inline function is just a convenient way to call TypeRegistry::register_type(),...
Definition register_type.I:22
renderAttrib.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.