4 Copyright 2008-2012 Michel Pollet <buserror@gmail.com>
6 This file is part of simavr.
8 simavr is free software: you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation, either version 3 of the License, or
11 (at your option) any later version.
13 simavr is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with simavr. If not, see <http://www.gnu.org/licenses/>.
23 * c3geometry is a structure containing one set of vertices and various
24 * bits related to it. Ultimately it contains a pre-cached projected
25 * version of the vertices that the drawing code can use directly.
26 * c3geometry is aways attached to a c3object as a parent.
29 #ifndef __C3GEOMETRY_H___
30 #define __C3GEOMETRY_H___
32 #include "c3algebra.h"
35 typedef c3vec3 c3vertex, *c3vertex_p;
36 typedef c3vec4 c3colorf, *c3colorf_p;
37 typedef c3vec2 c3tex, *c3tex_p;
42 DECLARE_C_ARRAY(c3vertex, c3vertex_array, 16);
43 DECLARE_C_ARRAY(c3tex, c3tex_array, 16);
44 DECLARE_C_ARRAY(c3colorf, c3colorf_array, 16);
46 //! Geometry material. TODO: Beef up. Add vertex/fragment programs..
47 typedef struct c3material_t {
49 struct c3pixels_t * texture;
59 //! Bounding box. TODO: Move to a separate file?
60 typedef struct c3bbox_t {
64 //! Generic geometry type
74 * The type is used as non-opengl description of what the geometry
75 * contains, like "texture", and the subtype can be used to store the
76 * real format of the vertices. like GL_LINES etc
78 typedef union c3geometry_type_t {
79 struct { uint32_t type : 16, subtype : 16; };
84 * Geometry object. Describes a set of vertices, texture coordinates,
85 * normals, colors and material
86 * The projection is not set here, a geometry is always attached to a
87 * c3object that has the projection
89 typedef struct c3geometry_t {
90 c3geometry_type_t type; // C3_TRIANGLE_TYPE, GL_LINES etc
92 custom : 1; // has a custom driver
93 str_p name; // optional
95 struct c3object_t * object;
96 const struct c3driver_geometry_t ** driver;
98 c3vertex_array_t vertice;
99 c3tex_array_t textures;
100 c3colorf_array_t colorf;
101 c3vertex_array_t normals;
103 // projected version of the vertice
104 c3vertex_array_t projected;
108 * Some shared attributes
115 } c3geometry_t, *c3geometry_p;
117 DECLARE_C_ARRAY(c3geometry_p, c3geometry_array, 4);
119 //! Allocates a new geometry, init it, and attached it to parent 'o' (optional)
122 c3geometry_type_t type,
123 struct c3object_t * o /* = NULL */);
124 //! Init an existing new geometry, and attached it to parent 'o' (optional)
128 c3geometry_type_t type,
129 struct c3object_t * o /* = NULL */);
130 //! Disposes (via the driver interface) the geometry
135 //! Prepares a geometry.
137 * The project phase is called only when the container object is 'dirty'
138 * for example if it's projection has changed.
139 * The project call is responsible for reprojecting the geometry and that
147 //! Draw the geometry
149 * Called when drawing the context. Typicaly this calls the geometry
150 * driver, which in turn will call the 'context' draw method, and the
151 * application to draw this particular geometry
158 //! allocate (if not there) and return a custom driver for this geometry
160 * Geometries come with a default, read only driver stack.. It is a constant
161 * global to save memory for each of the 'generic' object.
162 * This call will duplicate that stack and allocate (if not there) a read/write
163 * empty driver that the application can use to put their own, per object,
164 * callback. For example you can add your own project() or draw() function
165 * and have it called first
167 struct c3driver_geometry_t *
168 c3geometry_get_custom(
171 IMPLEMENT_C_ARRAY(c3geometry_array);
172 IMPLEMENT_C_ARRAY(c3vertex_array);
173 IMPLEMENT_C_ARRAY(c3tex_array);
174 IMPLEMENT_C_ARRAY(c3colorf_array);
176 static inline c3geometry_type_t
177 c3geometry_type(int type, int subtype)
179 c3geometry_type_t r;// = { .type = type, .subtype = subtype }; // older gcc <4.6 doesn't like this
180 r.type = type; r.subtype = subtype;
184 #endif /* __C3GEOMETRY_H___ */