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initialize stars; currently behind camera :(

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This commit is contained in:
Josh Holtrop 2011-03-24 14:03:51 -04:00
parent d034c2d667
commit c10caad2f9
2 changed files with 20 additions and 5 deletions
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14
modes/Starfield.cc
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@ -16,7 +16,7 @@ Starfield::Starfield(GnomeScreensaver & gs)
m_last_ticks = ticks;
srand(time(NULL) + getpid());
for (int i = 0; i < NUM_STARS; i++)
newStar(i, ticks);
newStar(i, ticks + (uint64_t) (i * FLYBY_TICKS / (double)NUM_STARS));
}
Starfield::~Starfield()
@ -30,10 +30,17 @@ bool Starfield::expose (GnomeScreensaver & gs)
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glViewport(0, 0, gs.getWidth(), gs.getHeight());
for (int i = 0; i < NUM_STARS; i++)
{
glPushMatrix();
glTranslatef(0, 0, -30);
glTranslatef(m_stars[i].x, m_stars[i].y,
(ticks - m_stars[i].create_time)
* (FLYBY_TICKS / (double)MAX_STAR_DIST));
glRotatef(m_stars[i].rot,
m_stars[i].axis[0], m_stars[i].axis[1], m_stars[i].axis[2]);
m_logobox.draw();
glPopMatrix();
}
m_last_ticks = gs.getTicks();
@ -71,4 +78,7 @@ void Starfield::newStar(int idx, uint64_t ticks)
{
m_stars[idx].create_time = ticks;
getRandomAxis(&m_stars[idx].axis);
m_stars[idx].x = ((rand() / (double)RAND_MAX) - 0.5) * STAR_MAXX * 2;
m_stars[idx].y = ((rand() / (double)RAND_MAX) - 0.5) * STAR_MAXY * 2;
m_stars[idx].rot = rand() / (double)RAND_MAX * 360.0;
}

5
modes/Starfield.h
View File

@ -8,6 +8,9 @@
#define NUM_STARS 1000
#define MAX_STAR_DIST 1000
#define FLYBY_TICKS 3000
#define STAR_MAXX 500
#define STAR_MAXY 400
class Starfield : public Mode
{
@ -22,6 +25,8 @@ class Starfield : public Mode
public:
float axis[3];
uint64_t create_time;
float x, y;
float rot;
};
protected:
LogoBox m_logobox;