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geomEnums.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 geomEnums.h
10 * @author drose
11 * @date 2005-04-14
12 */
13
14#ifndef GEOMENUMS_H
15#define GEOMENUMS_H
16
17#include "pandabase.h"
18
19/**
20 * This class exists just to provide scoping for the various enumerated types
21 * used by Geom, GeomVertexData, GeomVertexArrayData, GeomPrimitive, and other
22 * related classes.
23 */
24 class EXPCL_PANDA_GOBJ GeomEnums {
25PUBLISHED:
26
27 // The usage hint describes to the rendering backend how often the data in
28 // question will be modified andor rendered. It allows the backend to make
29 // appropriate choices about what part of memory the data should be stored
30 // in.
31
32 // The hint is provided as a performance optimization only, and does not
33 // constrain actual usage; although it may be an important optimization.
34
35 enum UsageHint {
36 // The following are intentionally ordered from most dynamic to most
37 // static. In general, if usage_a < usage_b, then usage_a is more dynamic
38 // than usage_b.
39
40 // UH_client: don't attempt to upload the data; always keep it on the
41 // client.
42 UH_client,
43
44 // UH_stream: the data will be created once, used to render a few times,
45 // and then discarded. This should be used for short-lived temporary
46 // objects.
47 UH_stream,
48
49 // UH_dynamic: the data will be repeatedly modified and re-rendered. This
50 // is for data that will be modified at runtime, such as animated or soft-
51 // skinned vertices.
52 UH_dynamic,
53
54 // UH_static: the data will be created once, and used to render many
55 // times, without modification. This is the most common case, since
56 // typically vertex data is not directly animated (this is not related to
57 // scene graph animation, e.g. from adjusting transforms on a node).
58 UH_static,
59
60 // UH_unspecified: the usage is unspecified. This is intended as a "don't
61 // care" option for abstract objects; it should not be applied to any
62 // actual geometry to be rendered. You take your chances if a geom
63 // actually gets into the scene graph with this set.
64 UH_unspecified,
65 };
66
67 // This type specifies a number of bits that are used to represent the
68 // rendering requirements of a particular Geom, as well as the rendering
69 // capabilities of the GSG. The difference between the two indicates
70 // whether the Geom needs to be munged for the GSG.
71 enum GeomRendering {
72 // If there are indexed points.
73 GR_indexed_point = 0x00001,
74
75 // If there is indexed geometry of any other type.
76 GR_indexed_other = 0x10000,
77
78 // The union of all of the indexed attributes.
79 GR_indexed_bits = 0x10001,
80
81 // If there are any points at all.
82 GR_point = 0x00002,
83
84 // If the points are all the same size, other than 1 pixel.
85 GR_point_uniform_size = 0x00004,
86
87 // If the points have a per-vertex size designation.
88 GR_per_point_size = 0x00008,
89
90 // If the points' size is specified in camera units rather than screen
91 // pixels.
92 GR_point_perspective = 0x00010,
93
94 // If the points have a non-square aspect ratio.
95 GR_point_aspect_ratio = 0x00020,
96
97 // If the points are under a scale transform, uniform or non-uniform.
98 GR_point_scale = 0x00040,
99
100 // If the points are rotated off the orthonormal axis.
101 GR_point_rotate = 0x00080,
102
103 // If the points require texture coordinates interpolated across their
104 // face, to render textures as sprites.
105 GR_point_sprite = 0x00100,
106
107 // If there is a texture matrix applied to the sprite's generated texture
108 // coordinates.
109 GR_point_sprite_tex_matrix = 0x00200,
110
111 // The union of all the above point attributes, except GR_indexed_point.
112 GR_point_bits = 0x003fe,
113
114 // If there are any of these composite types.
115 GR_triangle_strip = 0x00400,
116 GR_triangle_fan = 0x00800,
117 GR_line_strip = 0x01000,
118
119 // The union of all of the above composite types.
120 GR_composite_bits = 0x01c00,
121
122 // If strip-cut indices are used to restart a composite primitive.
123 GR_strip_cut_index = 0x20000,
124
125 // If the shade model requires a particular vertex for flat shading.
126 GR_flat_first_vertex = 0x02000,
127 GR_flat_last_vertex = 0x04000,
128
129 // The union of the above shade model types.
130 GR_shade_model_bits = 0x06000,
131
132 // If a particular non-fill polygon mode is used.
133 GR_render_mode_wireframe= 0x40000,
134 GR_render_mode_point = 0x80000,
135
136 // The primitive has adjacency information.
137 GR_adjacency = 0x100000,
138 };
139
140 // The shade model specifies whether the per-vertex colors and normals
141 // indexed by a given primitive truly represent per-vertex colors and
142 // normals, or whether they actually represent per-triangle flat-shaded
143 // colors and normals.
144 enum ShadeModel {
145 // SM_uniform: all vertices across all faces have the same colors and
146 // normals. It doesn't really matter which ShadeModelAttrib mode is used
147 // to render this primitive.
148 SM_uniform,
149
150 // SM_smooth: vertices within a single face have different colorsnormals
151 // that should be smoothed across the face. This primitive should be
152 // rendered with SmoothModelAttrib::M_smooth.
153 SM_smooth,
154
155 // SM_flat_(first,last)_vertex: each face within the primitive might have
156 // a different colornormal than the other faces, but across a particular
157 // face there is only one colornormal. Each face's colornormal is taken
158 // from the (first, last) vertex of the face. This primitive should be
159 // rendered with SmoothModelAttrib::M_flat.
160 SM_flat_first_vertex,
161 SM_flat_last_vertex,
162 };
163
164 // The primitive type represents the core primitive type of a particular
165 // GeomPrimitive. It's used for determining what kind of antialiasing
166 // should be enabled.
167 enum PrimitiveType {
168 PT_none,
169 PT_polygons,
170 PT_lines,
171 PT_points,
172 PT_patches
173 };
174
175 // The numeric type determines what physical representation is used to
176 // encode a numeric value within the vertex data.
177 enum NumericType {
178 NT_uint8, // An integer 0..255
179 NT_uint16, // An integer 0..65535
180 NT_uint32, // An integer 0..4294967295
181 NT_packed_dcba, // DirectX style, four byte values packed in a uint32
182 NT_packed_dabc, // DirectX packed color order (ARGB)
183 NT_float32, // A single-precision float
184 NT_float64, // A double-precision float
185 NT_stdfloat, // Either single- or double-precision, according to vertices-float64.
186 NT_int8, // An integer -128..127
187 NT_int16, // An integer -32768..32767
188 NT_int32, // An integer -2147483648..2147483647
189 NT_packed_ufloat,// Three 10/11-bit float components packed in a uint32
190 };
191
192 // The contents determine the semantic meaning of a numeric value within the
193 // vertex data. This is also used to determine what automatic transforms
194 // might be applied to the various columns.
195 enum Contents {
196 C_other, // Arbitrary meaning, leave it alone
197 C_point, // A point in 3-space or 4-space
198 C_clip_point, // A point pre-transformed into clip coordinates
199 C_vector, // A surface tangent or binormal (see C_normal for normals)
200 C_texcoord, // A texture coordinate
201 C_color, // 3- or 4-component color, ordered R, G, B, [A]
202 C_index, // An index value into some other table
203 C_morph_delta, // A delta from some base value, defining a blend shape
204
205 // A transformation matrix. This is typically three or four columns, but
206 // we pretend it's only one for convenience.
207 C_matrix,
208
209 // A special version of C_vector that should be used for normal vectors,
210 // which are scaled differently from other vectors.
211 C_normal,
212 };
213
214 // The type of animation data that is represented by a particular
215 // GeomVertexFormat.
216 enum AnimationType {
217 AT_none, // No vertex animation.
218 AT_panda, // Vertex animation calculated on the CPU by Panda.
219 AT_hardware, // Hardware-accelerated animation on the graphics card.
220 };
221};
222
223EXPCL_PANDA_GOBJ std::ostream &operator << (std::ostream &out, GeomEnums::UsageHint usage_hint);
224EXPCL_PANDA_GOBJ std::istream &operator >> (std::istream &in, GeomEnums::UsageHint &usage_hint);
225EXPCL_PANDA_GOBJ std::ostream &operator << (std::ostream &out, GeomEnums::NumericType numeric_type);
226EXPCL_PANDA_GOBJ std::ostream &operator << (std::ostream &out, GeomEnums::Contents contents);
227
228#endif
GeomEnums
This class exists just to provide scoping for the various enumerated types used by Geom,...
Definition geomEnums.h:24
pandabase.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.