As i wanted to make a ball move on the screen (wich is my first attempt on doing that) i though ill use 13 h mode .... my ball movement went slow and i could see the ball getting refreshed evry time. So i was thinking mayb the 13h mode is just slow (wich i already speeded up as much as i could) so i would port it to BGI (borland graphixs interface).
Although ive got a higher resolution now im still having the same problem i can see the ball getting refreshed...
heres my code
of main...
And heres my draw_ball functionCode:#include <graphics.h>
#include <conio.h>
#include <stdlib.h>
#include <dos.h>
#include <math.h>
int main( )
{
int gdriver, gmode, errorcode;
char driver_path;
detectgraph(&gdriver, &gmode); /*VGA HI 640*480*/
initgraph(&gdriver, &gmode, &driver_path);
int angle;
float COS_TABLE[360], SIN_TABLE[360];
float pi=3.14159;
for(angle=0;angle<360;angle++){
COS_TABLE[angle]=cos((float)angle/180 * pi);
SIN_TABLE[angle]=sin((float)angle/180 * pi);
}
int moves=0;
int direction;
int r;
srand(NULL);
for(moves=0;moves<10;moves++){
direction=rand() %361;
for(r=0;r<40;r++){
draw_ball(100+(COS_TABLE[direction]*r),100+(SIN_TABLE[direction]*r),5,COS_TABLE,SIN_TABLE);
delay(100);
draw_ball(100+(COS_TABLE[direction]*r),100+(SIN_TABLE[direction]*r),0,COS_TABLE,SIN_TABLE);
}
}
sleep(2);
return 0;
}
I think i know where the problem is. Its that the app always has to recalculate every ball and then put it onto the screen....Code:int draw_ball(int x,int y,int color, float COS_TABLE[] , float SIN_TABLE[]){
for(int a=0;a<360;a++){
for(int radius=0;radius<5;radius++){
putpixel(x+COS_TABLE[a]*radius,y+SIN_TABLE[a]*radius,color);
}
}
return 0;
}
Is there some way i can save this "ball" at runtime.
So that the app has to calculate the ball one time and then just moves the ball by choosing direction, speed, x start and y start.
Thx in advance.
::edit::
sry bout the indentations when im writing code i always use tabs to indent.
