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
|
/*
* Copyright (C) Volition, Inc. 1999. All rights reserved.
*
* All source code herein is the property of Volition, Inc. You may not sell
* or otherwise commercially exploit the source or things you created based on the
* source.
*
*/
#ifndef _TRAILS_H
#define _TRAILS_H
#include "globalincs/pstypes.h"
#include "graphics/generic.h"
#define NUM_TRAIL_SECTIONS 128
// contrail info - similar to that for missile trails
// place this inside of info structures instead of explicit structs (eg. ship_info instead of ship, or weapon_info instead of weapon)
typedef struct trail_info {
vec3d pt; // offset from the object's center
float w_start; // starting width
float w_end; // ending width
float a_start; // starting alpha
float a_end; // ending alpha
float max_life; // max_life for a section
int stamp; // spew timestamp
generic_bitmap texture; // texture to use for trail
int n_fade_out_sections;// number of initial sections used for fading out start 'edge' of the effect
} trail_info;
typedef struct trail {
int head, tail; // pointers into the queue for the trail points
vec3d pos[NUM_TRAIL_SECTIONS]; // positions of trail points
float val[NUM_TRAIL_SECTIONS]; // for each point, a value that tells how much to fade out
bool object_died; // set to zero as long as object
int trail_stamp; // trail timestamp
// trail info
trail_info info; // this is passed when creating a trail
struct trail * next;
} trail;
// Call at the start of freespace to init trails
// Call at start of level to reinit all missilie trail stuff
void trail_level_init();
void trail_level_close();
// Needs to be called from somewhere to move the trails each frame
void trail_move_all(float frametime);
// Needs to be called from somewhere to render the trails each frame
void trail_render_all();
// The following functions are what the weapon code calls
// to deal with trails:
// Returns -1 if failed
trail *trail_create(trail_info *info);
void trail_add_segment( trail *trailp, vec3d *pos );
void trail_set_segment( trail *trailp, vec3d *pos );
void trail_object_died( trail *trailp );
int trail_stamp_elapsed( trail *trailp );
void trail_set_stamp( trail *trailp );
#endif //_TRAILS_H
|
