blob: b4f50d681c15cdf95490772f453f4d1bd93d6978 (
plain)
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
|
#include "firefly.h"
#include "scene.h"
#include "modes.h"
Firefly::Firefly(Bait *_bait, Vec3f ctr, double spread)
: Arrow(), bait(_bait), age(0.)
{
pos = ctr;
pos += rand_vec3(-spread, spread);
velocity = bait->fspeed*unit_vec(bait->pos - pos);
tail = new Tail(this);
}
Firefly::~Firefly()
{
tail->owner = 0;
scene.dead_tails.push_back(tail);
}
void Firefly::draw()
{
glPushMatrix();
Arrow::draw();
glPopMatrix();
tail->draw();
}
void Firefly::elapse(double t)
{
age += t;
calc_accel();
velocity += accel*t;
clamp_vec(velocity, bait->fspeed);
pos += velocity*t;
point(velocity);
set_color();
// elapse, my children
tail->elapse(t);
}
void Firefly::calc_accel()
{
if (age > 2.0 && rand_int(0, 60)==0) {
GLuint i, closest_i = 0;
double dist, closest_dist = 1e10;
for (i = 0; i < scene.baits.size(); i++) {
if ((dist=norm(scene.baits[i]->pos - pos)) < closest_dist) {
closest_dist = dist;
closest_i = i;
}
}
dist = norm(bait->pos - pos);
if (closest_dist < dist-1.0) {
bait = scene.baits[closest_i];
age = 0.;
}
}
else if (age > 5.0) {
if (norm(bait->pos - pos) >= 200 && !(bait->bspeed == 0 || bait->attractor)) {
bait->mode_next = BMODE_STOP;
}
}
accel = bait->faccel*unit_vec(bait->pos - pos);
}
void Firefly::set_color()
{
hsv = bait->hsv;
hsv[0] += 40*norm2(velocity)/(bait->fspeed*bait->fspeed) - 20;
// clamp to my range
while (hsv[0] > 360.f)
hsv[0] -= 360.f;
while (hsv[0] < 0.f)
hsv[0] += 360.f;
color = hsv_to_rgb(hsv);
}
|
