niestety po wyrugowaniu transformacji dla kazdego pixela,
czyli przepisaniu petli rysujacej mw z 1 na 2




///////////////////////1

for( int j=0; j<sprite_height; j++)
{
for(int i=0; i<sprite_width; i++)
{

unsigned v = sprites_buf_[sprite_bitmap_posy+j]
[sprite_bitmap_posx+i];




x= x - (transform_x + transform_center_point_x);
y= y - (transform_y + transform_center_point_y);

float x_prim = transform_alfa_cos * x + transform_alfa_sin * y;
float y_prim = -transform_alfa_sin * x + transform_alfa_cos * y;

x = x_prim + transform_center_point_x;
y = y_prim + transform_center_point_y;

x = x - sprite_centre_x;
y = y - sprite_centre_y;

x_prim = sprite_alfa_cos * x + sprite_alfa_sin * y;
y_prim = -sprite_alfa_sin * x + sprite_alfa_cos * y;

x = x_prim + sprite_centre_x;
y = y_prim + sprite_centre_y;


int yc = CLIENT_Y-y;

if(!pBits) return;

if(yc<0) return;
if(yc>=CLIENT_Y) return;
if(x<0) return;
if(x>=CLIENT_X) return;
int adr = (yc*CLIENT_X+x);
((unsigned*)pBits)[adr] = color;

}

}




//////////////////////2



for(int j=0; j<sprite_height; j++)
{

for(int i=0; i<sprite_width; i++)
{

unsigned v = sprites_buf_[sprite_bitmap_posy+j]
[sprite_bitmap_posx+i];


int yc = CLIENT_Y-y;

if(!pBits) return;

if(yc<0) return;
if(yc>=CLIENT_Y) return;
if(x<0) return;
if(x>=CLIENT_X) return;
int adr = (yc*CLIENT_X+x);
((unsigned*)pBits)[adr] = color;


x+=dxdx;
y+=dydx;

}

x -= (xBfiz-xAfiz);
y -= (yBfiz-yAfiz);

x += dxdy;
y += dydy;


}

///////////////
program przyspieszyl ledwie o jakies 25-30% :-(
nie rozumiem tego bo w wewnetrzenej petli masa dodawan i mnozen
zamienila sie na dwa dodawania :-/ - cos tu jest nie tak






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Wysłano z serwisu Usenet w portalu Gazeta.pl -> http://www.gazeta.pl/usenet/