-
Notifications
You must be signed in to change notification settings - Fork 0
/
particle.cpp
126 lines (107 loc) · 4.02 KB
/
particle.cpp
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
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
#include <deque>
#include <gl/gl.h>
#include <gl/glu.h>
#include <gl/glext.h>
#include <windows.h>
#include "metrics.h"
#include "particle.h"
#include "model.h"
#include "settings.h"
#include "debugout.h"
namespace ptl {
using std::deque;
deque<cParticle> particles;
GLuint texId;
int liveParticles;
rect4f limits;
void initParticles()
{
particles.resize(OPT_NUM_INITIAL_PTLS);
deque<cParticle>::iterator ptlIter;
for( ptlIter = particles.begin(); ptlIter != particles.end(); ptlIter ++ )
{
ptlIter->active = false;
}
cModel dummyModel;
texId = dummyModel.loadTexture(OPT_PATH_TEXTURES + (string)"particle" + OPT_PATHEXT_TEXTURES);
}
void setLimits(rect4f newlimits) {
limits = newlimits;
}
void createParticles(deque<cParticle> &newParticles)
{
deque<cParticle>::iterator newPtlIter = newParticles.begin();
// Check for unused spots
deque<cParticle>::iterator ptlIter;
for( ptlIter = particles.begin(); ptlIter != particles.end(); ptlIter ++ )
{
if(! ptlIter->active)
{
*ptlIter = *newPtlIter;
ptlIter->active = true;
newPtlIter ++;
if(newPtlIter == newParticles.end()) return;
}
}
if((newPtlIter != newParticles.end()) && (liveParticles < OPT_MAX_PTLS))
{
// Didn't find unused spot, so create them
for( newPtlIter = newPtlIter; newPtlIter != newParticles.end(); newPtlIter ++ )
{
particles.push_back(*newPtlIter);
particles.back().active = true;
}
}
}
void tickParticles()
{
deque<cParticle>::iterator ptlIter;
for( ptlIter = particles.begin(); ptlIter != particles.end(); ptlIter ++ )
{
if(ptlIter->life > 0)
{
ptlIter->position.x += ptlIter->velocity.x / 100;
ptlIter->position.y += ptlIter->velocity.y / 100;
ptlIter->position.z += ptlIter->velocity.z / 100;
ptlIter->velocity.x += ptlIter->acceleration.x / 100;
ptlIter->velocity.y += ptlIter->acceleration.y / 100;
ptlIter->velocity.z += ptlIter->acceleration.z / 100;
ptlIter->life -= ptlIter->fade / 100;
if(ptlIter->position.x < limits.x1) ptlIter->position.x = limits.x2;
if(ptlIter->position.y < limits.y1) ptlIter->position.y = limits.y2;
if(ptlIter->position.x > limits.x2) ptlIter->position.x = limits.x1;
if(ptlIter->position.y > limits.y2) ptlIter->position.y = limits.y1;
}
else
{
ptlIter->active = false;
}
}
}
void renderParticles()
{
glDisable(GL_LIGHTING);
glBindTexture(GL_TEXTURE_2D, texId);
liveParticles = 0;
deque<cParticle>::iterator ptlIter;
for( ptlIter = particles.begin(); ptlIter != particles.end(); ptlIter++ )
{
if(ptlIter->active)
{
glBegin(GL_TRIANGLE_STRIP);
glColor4f(ptlIter->r, ptlIter->g, ptlIter->b, ptlIter->life);
glTexCoord2d(1,1); glVertex3f(ptlIter->position.x + 0.1f, ptlIter->position.y + 0.1f, ptlIter->position.z); // Top Right
glTexCoord2d(0,1); glVertex3f(ptlIter->position.x - 0.1f, ptlIter->position.y + 0.1f, ptlIter->position.z); // Top Left
glTexCoord2d(1,0); glVertex3f(ptlIter->position.x + 0.1f, ptlIter->position.y - 0.1f, ptlIter->position.z); // Bottom Right
glTexCoord2d(0,0); glVertex3f(ptlIter->position.x - 0.1f, ptlIter->position.y - 0.1f, ptlIter->position.z); // Bottom Left
glEnd();
liveParticles ++;
}
}
glEnable(GL_LIGHTING);
}
int getLiveParticles()
{
return liveParticles;
}
} /* namespace ptl */