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rem Textured 3d cube routine
rem I'M BUILDING A GRAPHIC DATA BUILDER
rem I'LL POST IT WHEN I'M DONE!
rem enjoy...
rem iPhone 6 Plus / 8.3 b2

gosub setup

loop:
refresh off
graphics clear
gosub drawcube
gosub rotate
refresh on
goto loop

drawcube:
for i=1 to 6
c1=ac1(i)!c2=ac2(i)
c3=ac3(i)!c4=ac4(i)
gosub cp
if cp<0 then goto skip2
gosub fillface
skip2:
next i
return

fillface:
ax2=(xx(c2)-xx(c3))/sprx
ay2=(yy(c2)-yy(c3))/spry
ax3=(xx(c4)-xx(c1))/sprx
ay3=(yy(c4)-yy(c1))/spry

for a=0 to sprx
ta3=(ax3*a)+xx(c1)
tb3=(ay3*a)+yy(c1)
ta2=(ax2*a)+xx(c3)
tb2=(ay2*a)+yy(c3)

tx=(ta3-ta2)/sprx
ty=(tb3-tb2)/spry

for b=0 to spry
gx(a,b)=(tx*b)+ta2
gy(a,b)=(ty*b)+tb2
next b
next a

for b=0 to spry-1
for a=0 to sprx-1
if texture(a,b)>0 then

CB = and(texture(a,b),16711680)/65536
CG = (and(texture(a,b),65280)/256%256)
CR = (texture(a,b)%256)
fill color CR/255,CG/255,CB/255

'fill triangle gx(a,b),gy(a,b) to gx(a+1,b),gy(a+1,b) to gx(a,b+1),gy(a,b+1)
trix(0)=gx(a,b)
triy(0)=gy(a,b)
trix(1)=gx(a+1,b)
triy(1)=gy(a+1,b)
trix(2)=gx(a,b+1)
triy(2)=gy(a,b+1)
fill poly trix,triy count 3
'fill triangle gx(a+1,b+1),gy(a+1,b+1) to gx(a+1,b),gy(a+1,b) to gx(a,b+1),gy(a,b+1)
trix(0)=gx(a+1,b+1)
triy(0)=gy(a+1,b+1)
trix(1)=gx(a+1,b)
triy(1)=gy(a+1,b)
trix(2)=gx(a,b+1)
triy(2)=gy(a,b+1)
fill poly trix,triy count 3
end if
next a
next b
return

cp:
cp=(xx(c1)-xx(c2))*(yy(c3)-yy(c2))-(xx(c3)-xx(c2))*(yy(c1)-yy(c2))
return

rotate:
xr=xr+1
if xr>360 then xr=xr-360
yr=yr+2
if yr>360 then yr=yr-360
zr=zr+1
if zr>360 then zr=zr-360
s=s+1
if s>360 then s=s-360
sz=sine(s)

for a=1 to points
x1=x(a)
y1=y(a)
z1=z(a)
txx=x1
tyy=y1*cosi(xr)+z1*sine(xr)
tzz=z1*cosi(xr)-y1*sine(xr)
y1=tyy
x1=txx*cosi(yr)-tzz*sine(yr)
z1=txx*sine(yr)+tzz*cosi(yr)
tzz=z1
txx=x1*cosi(zr)-y1*sine(zr)
tyy=x1*sine(zr)+y1*cosi(zr)
dx(a)=txx
dy(a)=tyy
dz(a)=tzz
xx(a)=sz*((dx(a)/((dz(a)/focus)+1)))+cx
yy(a)=sz*((dy(a)/((dz(a)/focus)+1)))+cy
next a
return


setup:
graphics
sw=screen_width()
sh=screen_height()
pi=3.1415

points=8! focus=500! cx=sw/2! cy=sh/2
dim sine(362),cosi(362)
dim x(points+1),y(points+1),z(points+1),xx(points+1),yy(points+1)
dim dx(points+1),dy(points+1),dz(points+1)

for a=0 to 361
cosi(a)=cos(a*(pi/180))
sine(a)=sin(a*(pi/180))
next a

for a=1 to points
read x(a)
read y(a)
read z(a)
next a

dim ac1(7),ac2(7),ac3(7),ac4(7)
for a=1 to 6
read ac1(a),ac2(a),ac3(a),ac4(a)
next a

read sprx
read spry
read filter
dim gx(sprx+2,spry+2),gy(sprx+2,spry+2)
dim texture(sprx+1,spry+1)

for b=0 to spry rem -1
for a=0 to sprx rem -1
read texture(a,b)
next a
next b
return

data 100, 100, 100,-100, 100, 100,-100, 100,-100
data 100, 100,-100, 100,-100, 100,-100,-100, 100
data -100,-100,-100, 100,-100,-100, 1,3,2,4,1,8,4,5
data 8,6,7,5,6,3,7,2,3,8,7,4,1,6,5,2


REM - COLOR AND TEXTURE CODE:


data 27,27,10
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So much great work!
Texture image is very complex...

Thank you, I think! Smart Basic was the only iOS basic fast enough to run my sloppy routines.

If you use 4-points polygons instead of 3-points, it would be faster.

I'm old school programmer, the days when demos and intros were placed before cracked games. I'll try my next project with 4 instead of 3. I'm working on a filled, spinning tunnel game. I'll try it there. Thanks for the tip! If you have any others, that would be great!

DrChip wrote:I'm old school programmer, the days when demos and intros were placed before cracked games. I'll try my next project with 4 instead of 3. I'm working on a filled, spinning tunnel game. I'll try it there. Thanks for the tip! If you have any others, that would be great!

Next version 4.8 will offer direct quad draw/fill command, which will not need prior storing data in array before using them.

Awesome!