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
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
|
/*
* This "effect" is almost totally untimed (ie. it counts frames, not
* seconds). Rationale: A faster machine will play the fades faster,
* but it will also _load_ faster, so it's reasonable that it also
* loads faster ;-) (If you want, do a s/rationale/excuse for being
* lazy/ ;-) ) Unfortunately, vsync messes this up ;-)
*/
#include "main/piprecalc.h"
#include <stdio.h>
#include <unistd.h>
#define PI_STRING "3.14159265358979323846264338327950288"
/* ahem ;-) */
#ifndef __linux__
#define usleep(x) Sleep(x)
#endif
PiPrecalc::PiPrecalc(GLWindow *win)
{
this->win = win;
this->font = texture::load("loaderfont.png");
this->font->bind();
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
this->last_status = 0;
}
PiPrecalc::~PiPrecalc()
{
/*
* simple fade to zero
* (some drivers don't appear to like that we base ourselves
* on the last frame, so we have to redraw every time here)
*/
for (int i = 0; i < 50; i++) {
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
glOrtho(0.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE);
glDisable(GL_LIGHTING);
glEnable(GL_TEXTURE_2D);
this->font->bind();
glColor4f(1.0f, 1.0f, 1.0f, (float)(49-i) / 49.0f);
glBegin(GL_QUADS);
for (int j = 0; j < 37; j++) {
char ch = PI_STRING[j];
int t = (ch == '.') ? 7 : (8 + (ch - '0'));
glTexCoord2f((float)(t) / 32.0f, 0.0f);
glVertex2f((float)(j+2) / 41.0f, 0.45f);
glTexCoord2f((float)(t+1) / 32.0f, 0.0f);
glVertex2f((float)(j+3) / 41.0f, 0.45f);
glTexCoord2f((float)(t+1) / 32.0f, 0.9f);
glVertex2f((float)(j+3) / 41.0f, 0.55f);
glTexCoord2f((float)(t) / 32.0f, 0.9f);
glVertex2f((float)(j+2) / 41.0f, 0.55f);
}
glEnd();
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
this->win->flip();
usleep(1);
}
delete this->font;
this->font = NULL;
}
void PiPrecalc::update(float p)
{
int target = (int)(p * 37.0f);
for (int i = this->last_status; i < target; i++) {
for (int fno = 0; fno < 7; fno++) {
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
glOrtho(0.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE);
glDisable(GL_LIGHTING);
glEnable(GL_TEXTURE_2D);
this->font->bind();
/* first rewrite the text :-) */
glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
/*
* then write every letter that we already wrote,
* and last the new letter
*/
for (int j = 0; j <= i; j++) {
char ch = PI_STRING[36 - j];
int t = (ch == '.') ? 7 : (8 + (ch - '0'));
if (j == i) {
glColor4f(1.0f, 1.0f, 1.0f, (float)(fno) / 6.0f);
}
glBegin(GL_QUADS);
glTexCoord2f((float)(t) / 32.0f, 0.0f);
glVertex2f((float)(38-j) / 41.0f, 0.45f);
glTexCoord2f((float)(t+1) / 32.0f, 0.0f);
glVertex2f((float)(38-j+1) / 41.0f, 0.45f);
glTexCoord2f((float)(t+1) / 32.0f, 0.9f);
glVertex2f((float)(38-j+1) / 41.0f, 0.55f);
glTexCoord2f((float)(t) / 32.0f, 0.9f);
glVertex2f((float)(38-j) / 41.0f, 0.55f);
glEnd();
}
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
this->win->flip();
usleep(1);
}
}
this->last_status = target;
}
|
