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Make the effect look better by adding certain randomness.

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svn path=/branches/work/kwin_composite/; revision=644640
This commit is contained in:
Luboš Luňák 2007-03-20 16:28:23 +00:00
parent 85677f205f
commit b75f3dfeb0
1 changed files with 18 additions and 10 deletions
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28
effects/fallapart.cpp
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@ -32,7 +32,7 @@ void FallApartEffect::prePaintWindow( EffectWindow* w, int* mask, QRegion* regio
{
if( windows[ w ] < 1 )
{
windows[ w ] += time / 500.;
windows[ w ] += time / 1000.;
*mask |= Scene::PAINT_WINDOW_TRANSFORMED;
glwin->enablePainting( Scene::Window::PAINT_DISABLED_BY_DELETE );
// Request the window to be divided into cells
@ -61,17 +61,25 @@ void FallApartEffect::paintWindow( EffectWindow* w, int mask, QRegion region, Wi
i < vertices.count();
i += 4 )
{
QPointF p1( vertices[ i ].pos[ 0 ], vertices[ i ].pos[ 1 ] );
QPointF p2( vertices[ i + 1 ].pos[ 0 ], vertices[ i + 1 ].pos[ 1 ] );
QPointF p3( vertices[ i + 2 ].pos[ 0 ], vertices[ i + 2 ].pos[ 1 ] );
QPointF p4( vertices[ i + 3 ].pos[ 0 ], vertices[ i + 3 ].pos[ 1 ] );
double xdiff = 0;
if( vertices[ i ].pos[ 0 ] < w->width() / 2 )
xdiff = -( w->width() / 2 - vertices[ i ].pos[ 0 ] ) / w->width() * 100;
if( vertices[ i ].pos[ 0 ] > w->width() / 2 )
xdiff = ( vertices[ i ].pos[ 0 ] - w->width() / 2 ) / w->width() * 100;
if( p1.x() < w->width() / 2 )
xdiff = -( w->width() / 2 - p1.x()) / w->width() * 100;
if( p1.x() > w->width() / 2 )
xdiff = ( p1.x() - w->width() / 2 ) / w->width() * 100;
double ydiff = 0;
if( vertices[ i ].pos[ 1 ] < w->height() / 2 )
ydiff = -( w->height() / 2 - vertices[ i ].pos[ 1 ] ) / w->height() * 100;
if( vertices[ i ].pos[ 1 ] > w->height() / 2 )
ydiff = ( vertices[ i ].pos[ 1 ] - w->height() / 2 ) / w->height() * 100;
double modif = windows[ w ] * windows[ w ] * 16;
if( p1.y() < w->height() / 2 )
ydiff = -( w->height() / 2 - p1.y()) / w->height() * 100;
if( p1.y() > w->height() / 2 )
ydiff = ( p1.y() - w->height() / 2 ) / w->height() * 100;
double modif = windows[ w ] * windows[ w ] * 64;
// change direction randomly but consistently
srandom( i );
xdiff += ( rand() % 21 - 10 );
ydiff += ( rand() % 21 - 10 );
for( int j = 0;
j < 4;
++j )