I discovered a webpage about BBCSDL games

Ok. Website indicated only 32bot version but the download section contained a 64bit version... Downloaded and installed without error. Notes instructed to install some dependencies, but my version of Linux Mint, already had those installed. Application starts and the user is presented with a choice of 2 IDE's. Loaded examples and all seems ok so far... Will inform you of any difficulties. Again. Thanks for the link!

Here is the RCBasic version of BBCSDL's "Saucer" graphic...



xmax = 640
ymax = 512
originx = xmax / 2
originy = ymax / 2

title$ = "Saucer BBCSDL2.0"

WindowOpen(1,title$,0,0,xmax,ymax,0)
CanvasOpen(1,xmax,ymax,0,0,xmax,ymax,0)

xs = 1
ys = 1
setColor(rgb(0,255,255))
a = originx
b = a * a
c = originy
m = 0
n = 0

do
clearcanvas
for x = 0 to a step xs
s = x * x
p = sqrt(b-s)
for i = -p to p step 6 * ys
r = sqrt(s + i * i) / a
q = (r - 1) * sin(24 * r)
y = int(i / 3 + q * c)
if i = -p then
m = y
n = y
end if
if y > m then
m = y
end if
if y < n then
n = y
end if
if m = y or n = y then
pset(originx + x, originy - y)
pset(originx - x, originy - y)
end if
next
next
update
loop until key(k_escape) = 1

It serves absolutely no purpose except for the fact it looks cool...

J

Yeah... A "saucer" was not my first impression... never the less, it's still cool...

This was one of the few examples that did not use any 'libraries'... But, from my experience with BBC Basic, it was WAY slower than what it is today... Is my age showing? lol

You are very familiar with RCBasic. Good job!!!!! Actually, you have good advanced techniques!


The BBCSDL package or the NaaLaa package includes adequate interesting examples. The interesting examples are very nice promotions.

If the RCBasic package includes adequate wonderful examples, RCBasic can also be promoted effectively.

Oh yes. CPU of 4mhz at best...

My knowledge of RCBasic comes from SDLBasic. RCBasic is very similar. A few tweaks here and there, in most cases, an easy conversion... lol
BBC Basic, even back then, had some weird commands that left us scratching our heads... Still, for an 8 bit machine, it got the job done...
Because of the slow CPU speed and limited memory, the BBC was able to redefine the ascii characters, to create 'tiles'... The advantage was, it was quicker to display an ascii character, than plot an 8 x 8 graphic. Display a character or plot 64 pixels... But, once the program finished, the redefined ascii characters returned to normal...

Now to fire up the coffee machine... Yum!