I'm trying to create a function that draws with the mouse using allegro. Here is the original code:
int SCREEN_WIDTH;
int SCREEN_HEIGHT;
BITMAP *buffer;
int sandcol;
int pthickness;
int mx, my, mx2, my2;
void ThickLine(BITMAP *bmp, int x, int y, int x_, int y_,int thickness, int color){
int dx = x - x_;
int dy = y - y_;
int d = sqrtf(dx * dx + dy * dy);
if (!d)
return;
int v[4 * 2];
v[0] = x - thickness * dy / d;
v[1] = y + thickness * dx / d;
v[2] = x + thickness * dy / d;
v[3] = y - thickness * dx / d;
v[4] = x_ + thickness * dy / d;
v[5] = y_ - thickness * dx / d;
v[6] = x_ - thickness * dy / d;
v[7] = y_ + thickness * dx / d;
polygon(bmp, 4, v, color);
}
void CreateGrains(){
ThickLine(buffer, mx2, my2, mx, my, pthickness, sandcol);
circlefill(buffer, mx, my, pthickness, sandcol);
}
int main(int argc, char *argv[]){
allegro_init();
install_mouse();
SCREEN_WIDTH = 620;
SCREEN_HEIGHT = 300;
set_gfx_mode( GFX_AUTODETECT_WINDOWED, SCREEN_WIDTH, SCREEN_HEIGHT, 0, 0);
show_mouse(screen);
pthickness=5;
buffer = create_bitmap(SCREEN_WIDTH, SCREEN_HEIGHT);
sandcol=makecol( 255, 255, 255);
while(!key[KEY_ESC]){
mx2 = mx;
my2 = my;
mx = mouse_x;
my = mouse_y;
if(mouse_b){
CreateGrains();
}
}
}when i click the mouse, it doesn't look natural; what is a better way to do this?
