shadows

[Barok]

on several games i've seen, the are around a sprite is a darker shade, in the shape of the sprite that's on the ground tile. does anyone know how to do this?

 

[binarycoder]

I am not sure but maybe you create a Shadow Sprite??

 

[qbasicking]

They probably drew the sprite pixil by pixil. They probably used something like this.

FOR x = 0 TO 10 'lets use round numbers
FOR y = 0 TO 10
IF sprite%(x,y) THEN
PSET (spx%+x,spy%+y),sprite%(x,y)
PSET (spx%+x+2,spy%+y+2), shadow%(POINT(spx%+x+2,spy%+y+2))
NEXT
NEXT

where they have a tabel made of the shadows for all of the colours

 

[Barok]

binarycoder: maybe it could work, but have you ever played quest for a king by sjzero? (demo) it utilizes shadows like this: it shows all the sprites. then below them is them upside down, except, say below the sprites is a grass tile with all these shades of green. the shadow is basically the same grass tile but with deeper shades of green, like a real shadow. (you don't really see real shadows all black or grey. it's just a deeper shade of those colours.) i'm guessing it's palette manipulation, and was just wondering if anyone knew about how it worked.

 

[qbasicking]

Try this in screen 13

a% = POINT (x%, y%)
IF a% > 31 AND a% < 183 THEN
PSET (x%, y%), a% + 72
ELSEIF a% < 32 AND a% > 14 THEN
PSET (x%, y%), a% + 1
ELSEIF a% > 182 THEN
PSET (x%, y%), 0
END IF

The colours 0 - 14 are oddballs you will have to assign shadows to them, but the ones above will be dead-on, this is using the default palettes for screen 13.

 

[Barok]

heh, i never really thought of that. I just remembered that the palette i'm working with is a gradient (e.g. say colour 20 is a very dark green, colour 40 would be a very bright green.) i'm trying to make a very flexible engine in pure qb, and thought that shadows would be a nice touch (wonder why i keep wanting to type real-time shadows?)

 

[Barok]

the only thing that would be a problem i guess would be the rotations. I mean, i don't want to waste space making dozens of upsidedown tiles, so i suppose that it would work better if i use sin and cos tables to rotate. then again, i'll probably use them for spell effects and particles anyways, and i guess if i make tables, the slowdown won't be bad, so i guess that'll work.