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
|
#include <stdio.h>
#include <string.h>
#ifdef WIN32
#include <windows.h>
#endif
#include <GL/gl.h>
#include "main/inverthandler.h"
#include "exception.h"
#include "demolib_prefs.h"
#include "opengl/texture.h"
#if DEMOLIB_MAINLOOP
InvertHandler::InvertHandler(MainLoop *ml, const char *title, const char *elem, Hashtable *attr) :
Event(ml, title, elem, attr, "alpha")
{
}
InvertHandler::~InvertHandler()
{
}
void InvertHandler::start_effect()
{
}
void InvertHandler::draw_scene(float progress)
{
float alpha = this->get_val("alpha", progress);
if (alpha <= 0.0f) return;
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
glOrtho(0.0f, 1.0f, 0.0f, 1.0f, 0.0f, 1.0f);
glEnable(GL_BLEND);
glBlendFunc(GL_ONE_MINUS_DST_COLOR, GL_ONE_MINUS_SRC_COLOR);
glColor4f(alpha, alpha, alpha, 1.0f);
glDisable(GL_LIGHTING);
glDisable(GL_DEPTH_TEST);
glDisable(GL_CULL_FACE);
glDisable(GL_TEXTURE_2D);
glBegin(GL_QUADS);
glVertex3f(0.0f, 0.0f, 0.0f);
glVertex3f(0.0f, 1.0f, 0.0f);
glVertex3f(1.0f, 1.0f, 0.0f);
glVertex3f(1.0f, 0.0f, 0.0f);
glEnd();
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
}
void InvertHandler::end_effect() {}
#endif
|
