var x,y,plotx,ploty:integer;
begin
x0:=screenx mod 64;
y0:=screeny mod 32;
for y:=-1 to 32 do
begin
for x:=-1 to 11 do
begin
PlotX:=X*64+(Y AND 1)*(32)-X0;
PlotY:=Y*16-Y0;
map[screenx div 64 + x , screeny div 32 + y].draw(plotx,ploty);
end;
end;
end;
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Scrolling in isometric engines
February 12, 2001 02:17 PM
Hi ,
I am working on an isometric engine with tile size of 64x32. For displaying I''m using
the following procedure (simplified) where screenx,screeny are the fine map coordinates.
The problem is that I cannot scroll the map on the Y coordinate. The movement is done
by simply incrementing or decrementing screenY. In this case the map "jumps" very weird
when the first row to display if even. I guess it''s because of the displaying procedure but
I can''t find a way to fix it. If someone could help me I would be very greatfull.
Thanks.
[Edited by - pasman on March 7, 2006 10:44:56 AM]
February 16, 2001 08:57 PM
I''m not sure what the C++ operator is (I know QBasic and VB, but am just beginning to learn C++) but in BASIC it is Int(). Try wrapping your divisions in Int() or whatever its C++ equivalent is. I was having the same problem in my VB DX7 tile engine, and though the logic was a little different, changing Cint(roudning - what you''re doing) to Int(w/o rounding) fixed it.
Try that.
Try that.
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