void StepLine(
register struct region *R, /* region being built */
register fractpel x1, /* starting ... */
register fractpel y1, /* ... point */
register fractpel x2, /* ending ... */
register fractpel y2) /* ... point */
{
register fractpel dy;
IfTrace4((LineDebug > 0), ".....StepLine: (%dl,%dl) to (%dl,%dl)\n",
x1, y1, x2, y2);
dy = y2 - y1;
/*
We execute the "GOING_TO" macro to call back the REGIONS module, if
necessary (like if the Y direction of the edge has changed):
*/
GOING_TO(R, x1, y1, x2, y2, dy);
if (dy == 0)
return;
if (dy < 0)
Bresenham(R->edge, x2, y2, x1, y1);
else
Bresenham(R->edge, x1, y1, x2, y2);
return;
}
void cohen_test(Pixel *PixelBuffer) {
Raster raster;
Points bounds;
bounds.push_back({ 10, 10 });
bounds.push_back({ 10, 100 });
bounds.push_back({ 100, 100 });
bounds.push_back({ 100, 10 });
Points shape;
shape.push_back({ 5, 5 });
shape.push_back({ 50, 115 });
View view = View(SCREENSIZE, SCREENSIZE, PixelBuffer);
Points *p = raster.cohen_sutherland(&bounds, &shape);
if (p != NULL) {
Points *r = Bresenham(p->at(0), p->at(1));
view.update_buffer(r);
delete r;
} else {
std::cout << "NOPE< NULLLLLL\n";
}
delete p;
}
void main()
{
int gDriver=DETECT, gMode;
int x1,x2,y1,y2;
void Bresenham(int,int,int,int);
initgraph(&gDriver,&gMode,"c:\\tc\\bgi");
cout<<endl<<"x1 : ";
cin>>x1;
cout<<endl<<"y1 : ";
cin>>y1;
cout<<endl<<"x2 : ";
cin>>x2;
cout<<endl<<"y2 : ";
cin>>y2;
// line(320,0,320,480);
//line(0,240,640,240);
Bresenham(x1,x2,y1,y2);
getch();
}
