/
particle-emitter.h
107 lines (87 loc) · 3.09 KB
/
particle-emitter.h
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
/*
* Copyright © 2013 Intel Corporation
*
* Permission to use, copy, modify, distribute, and sell this software and
* its documentation for any purpose is hereby granted without fee, provided
* that the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of the copyright holders not be used in
* advertising or publicity pertaining to distribution of the software
* without specific, written prior permission. The copyright holders make
* no representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
* CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef _PARTICLE_EMITTER_H_
#define _PARTICLE_EMITTER_H_
#include "fuzzy.h"
#include <cglib/cglib.h>
/* <priv> */
struct particle_emitter_priv;
/*
* A particle emitter
*/
struct particle_emitter {
/*
* Controls whether the particle emitter is active. If false, no new
* particles are created.
*/
bool active;
/*
* The maximum number of particles that can exist at any given moment in
* time. When this number of particles has been generated, then new
* particles will only be created as and when old particles are
* destroyed.
*/
int particle_count;
/*
* This controls the rate at which new particles are generated.
*/
int new_particles_per_ms;
/*
* The size (in pixels) of particles. Each particle is represented by a
* rectangular point of dimensions particle_size × particle_size.
*/
float particle_size;
/*
* The length of time (in seconds) that a particle exists for.
*/
struct fuzzy_double particle_lifespan;
/*
* The starting position for particles.
*/
struct fuzzy_vector particle_position;
/*
* A unit vector to describe particle starting direction.
*/
struct fuzzy_vector particle_direction;
/*
* The initial particle speed.
*/
struct fuzzy_float particle_speed;
/*
* The initial particle color. Once created, a particle maintains the
* same color for the duration of it's lifespan, but it's opacity is
* related to it's age, so a particle begins opaque and fades into
* transparency.
*/
struct fuzzy_color particle_color;
/*
* A uniform global force which is applied to every particle. Can be
* used to model gravity, wind etc.
*/
float acceleration[3];
/* <priv> */
struct particle_emitter_priv *priv;
};
struct particle_emitter *particle_emitter_new(cg_device_t *dev, cg_framebuffer_t *fb);
void particle_emitter_free(struct particle_emitter *emitter);
void particle_emitter_paint(struct particle_emitter *emitter);
#endif /* _PARTICLE_EMITTER_H_ */