void Update()
{
const float t_sens=float(0.1);
const float r_sens=float(0.1);
euler_rotation.y+=input::mouseX;
euler_rotation.x+=input::mouseY;
rotation = quaternionf(vec3f(1,0,0),r_sens*euler_rotation.x*NV_PI/180);
rotation*= quaternionf(vec3f(0,1,0),r_sens*euler_rotation.y*NV_PI/180);
vec3f l_right(1,0,0);
vec3f l_forward(0,0,1);
quaternionf rev = inverse(rotation);
rev.mult_vec(l_forward);
rev.mult_vec(l_right);
position-= (t_sens * (input::Forward-input::Backward))*l_forward;
position-= (t_sens * (input::LeftStrafe-input::RightStrafe))*l_right;
}
/*
draw_thread
This is the drawing-thread.
You have a valid presentation space handle (hps), a valid window
handle (hwndSaver) and the configuration_data structure is loaded.
The screen size is stored in "screenSizeX" and "screenSizeY".
IMPORTANT NOTE 1:
You must check the "stop_draw_thread" flag regularly. If it is set,
free all resources you have allocated and call _endthread (or just
return) to end the drawing-thread.
IMPORTANT NOTE 2:
If the "low_priority" flag is NOT set (that means you run with
regular priority, sharing CPU usage with other programs), you should
call DosSleep(x) with "x" set at least to 1 as often as possible, to
allow other programs to do their work. A screen saver should not eat
up other program's CPU time!
IMPORTANT NOTE 3:
For some of the PM calls to work properly, your thread needs an
own HAB and maybe even a message queue. You have to get and release
both of them here if you use such PM calls.
The following sample code is from the "Pyramids" module that comes
with the ScreenSaver distribution.
It selects a random color and a random point on the screen, then
draws lines in the selected color from each corner of the screen
to the selected point (looks somewhat like a pyramid).
It remembers a number of points (this number can be set in the
configuration dialog). Having filled the point memory, it redraws
the "oldest" visible pyramid in black. This has the effect that more
and more pixels on the screen get black, only a few constantly
changing colored lines remain.
*/
void draw_thread(void *args)
{
POINTL BitmapPoints[4] = { 1, 1, screenSizeX + 2, screenSizeY + 2,
-1, -1, screenSizeX, screenSizeY };
POINTL l_b = { 0, 0 },
l_t = { 0, screenSizeY - 1 },
r_b = { screenSizeX - 1, 0 },
r_t = { screenSizeX - 1, screenSizeY - 1 };
INT i, step;
VOID l_left()
{
GpiMove( hps, &l_b );
GpiLine( hps, &l_t );
}
VOID l_right()
{
GpiMove( hps, &r_b );
GpiLine( hps, &r_t );
}
VOID l_top()
{
GpiMove( hps, &l_t );
GpiLine( hps, &r_t );
}
VOID l_bottom()
{
GpiMove( hps, &l_b );
GpiLine( hps, &r_b );
}
srand(WinGetCurrentTime( hab ));
GpiSetColor( hps, CLR_BLACK );
l_left();
while(!stop_draw_thread){
if( configuration_data.drunken ){
step = (unsigned)rand() % 8;
switch ( step ){
case 0: BitmapPoints[0].x = -1;
BitmapPoints[0].y = 0;
BitmapPoints[1].x = screenSizeX;
BitmapPoints[1].y = screenSizeY + 1;
l_bottom();
break;
case 1: BitmapPoints[0].x = 0;
BitmapPoints[0].y = 0;
BitmapPoints[1].x = screenSizeX + 1;
BitmapPoints[1].y = screenSizeY + 1;
l_bottom();
l_left();
break;
case 2: BitmapPoints[0].x = 0;
BitmapPoints[0].y = -1;
BitmapPoints[1].x = screenSizeX + 1;
BitmapPoints[1].y = screenSizeY;
l_left();
break;
case 3: BitmapPoints[0].x = 0;
BitmapPoints[0].y = -2;
BitmapPoints[1].x = screenSizeX + 1;
BitmapPoints[1].y = screenSizeY - 1;
l_left();
l_top();
break;
case 4: BitmapPoints[0].x = -1;
BitmapPoints[0].y = -2;
BitmapPoints[1].x = screenSizeX;
BitmapPoints[1].y = screenSizeY - 1;
l_top();
break;
case 5: BitmapPoints[0].x = -2;
BitmapPoints[0].y = -2;
BitmapPoints[1].x = screenSizeX - 1;
BitmapPoints[1].y = screenSizeY - 1;
l_top();
l_right();
break;
case 6: BitmapPoints[0].x = -2;
BitmapPoints[0].y = -1;
BitmapPoints[1].x = screenSizeX - 1;
BitmapPoints[1].y = screenSizeY;
l_right();
break;
case 7: BitmapPoints[0].x = -2;
BitmapPoints[0].y = 0;
BitmapPoints[1].x = screenSizeX - 1;
BitmapPoints[1].y = screenSizeY + 1;
l_right();
l_bottom();
break;
}
}
for( i = 1; i < 5; i++){
GpiBitBlt( hps, hps, 3, BitmapPoints, ROP_SRCCOPY, BBO_IGNORE );
if( stop_draw_thread) i = 10;
}
// sleep if necessary
if(low_priority == FALSE)
DosSleep(1);
// sleep if user requests slower animation
switch(configuration_data.animation_speed){
case 4: break;
case 3: DosSleep(10); break;
case 2: DosSleep(30); break;
case 1: DosSleep(50); break;
case 0: DosSleep(70); break;
}
}
// free resources
_endthread();
}
