This is the first prototype of Deluxe Ski Jump from 1999!
After three months of hard work I released the actual game on July 4th, 1999.
Happy 25th anniversary!
P.S. Switch the video to HD to enjoy the sharpness of large pixels!

Here is extract from the original source code to draw the hill.
Code: Select all
var maki:record
k,d:real;
x1,x2,x3:integer;
a,b,c:real;
end;
with maki do begin
x1:=10;
x2:=40;
x3:=120;
k:=-1.85;
d:=210;
a:=0.015;
b:=k-2*a*x2;
c:=k*x2+d-a*x2*x2-b*x2;
end;
function f(x0:real):real;
begin
with maki do
if x0<=x2 then f:=k*x0+d else f:=a*x0*x0+b*x0+c;
end;
procedure drawmaki;
var xk,yk:integer;
begin
for xk:=maki.x1 to maki.x3 do begin
yk:=round(f(xk));
mem[$a000:xk+(200-yk)*320]:=darkgray;
end;
end;