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geomPatches.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 geomPatches.h
10 * @author drose
11 * @date 2012-04-27
12 */
13
14#ifndef GEOMPATCHES_H
15#define GEOMPATCHES_H
16
17#include "pandabase.h"
18#include "geomPrimitive.h"
19
20/**
21 * Defines a series of "patches", fixed-size groupings of vertices that must
22 * be processed by a tessellation shader.
23 */
24class EXPCL_PANDA_GOBJ GeomPatches : public GeomPrimitive {
25PUBLISHED:
26 explicit GeomPatches(int num_vertices_per_patch, UsageHint usage_hint);
27 GeomPatches(const GeomPatches &copy);
28 virtual ~GeomPatches();
29 ALLOC_DELETED_CHAIN(GeomPatches);
30
31public:
32 virtual PT(GeomPrimitive) make_copy() const;
33 virtual PrimitiveType get_primitive_type() const;
34
35 virtual int get_num_vertices_per_primitive() const;
36
37public:
38 virtual bool draw(GraphicsStateGuardianBase *gsg,
39 const GeomPrimitivePipelineReader *reader,
40 bool force) const;
41
42private:
43 int _num_vertices_per_patch;
44
45public:
46 static void register_with_read_factory();
47 virtual void write_datagram(BamWriter *manager, Datagram &dg);
48
49protected:
50 void fillin(DatagramIterator &scan, BamReader *manager);
51 static TypedWritable *make_from_bam(const FactoryParams &params);
52
53public:
54 static TypeHandle get_class_type() {
55 return _type_handle;
56 }
57 static void init_type() {
58 GeomPrimitive::init_type();
59 register_type(_type_handle, "GeomPatches",
60 GeomPrimitive::get_class_type());
61 }
62 virtual TypeHandle get_type() const {
63 return get_class_type();
64 }
65 virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
66
67private:
68 static TypeHandle _type_handle;
69
70 friend class Geom;
71};
72
73#endif
This is the fundamental interface for extracting binary objects from a Bam file, as generated by a Ba...
Definition bamReader.h:110
This is the fundamental interface for writing binary objects to a Bam file, to be extracted later by ...
Definition bamWriter.h:63
A class to retrieve the individual data elements previously stored in a Datagram.
An ordered list of data elements, formatted in memory for transmission over a socket or writing to a ...
Definition datagram.h:38
An instance of this class is passed to the Factory when requesting it to do its business and construc...
Defines a series of "patches", fixed-size groupings of vertices that must be processed by a tessellat...
Definition geomPatches.h:24
Encapsulates the data from a GeomPrimitive, pre-fetched for one stage of the pipeline.
This is an abstract base class for a family of classes that represent the fundamental geometry primit...
virtual void write_datagram(BamWriter *manager, Datagram &dg)
Writes the contents of this object to the datagram for shipping out to a Bam file.
get_num_vertices_per_primitive
If the primitive type is a simple type in which all primitives have the same number of vertices,...
A container for geometry primitives.
Definition geom.h:54
This is a base class for the GraphicsStateGuardian class, which is itself a base class for the variou...
TypeHandle is the identifier used to differentiate C++ class types.
Definition typeHandle.h:81
Base class for objects that can be written to and read from Bam files.
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
void register_type(TypeHandle &type_handle, const std::string &name)
This inline function is just a convenient way to call TypeRegistry::register_type(),...