Sdl3dBoard
I hope to be able to expand on the ideas that I got while making this. The main idea is; 3d without openGL or other complex code.
option explicit
dim scnt = 100 , num = 100 , v1 = 11
dim cnt = 0 , count , m1
dim common tilt = 0.7
' declare array
dim common YSlope[9000]
dim common XSlope[9000]
dim common flip[9000]
dim common var[900]
directScreen
autoback(-2)
'screenswap
setdisplay( 800,600,32,1)
for count = 1 to 9000
XSlope[count] = 1
YSlope[count] = 1
flip[count] = 1
next
for count = 1 to 900
var[count] = 1
next
ink (rgb(20,60,80))
cls
function Zprint()
dim count
for count = 1 to 20
text ( 1150,count * 20,16,var[count] )
next
end function
function SetConversion( )
dim cnt = 0
dim x1 = 1 , y1 = 1
for cnt = 0 to 7000
XSlope[cnt] = x1
YSlope[cnt] = y1 ' * tilt
x1 = x1 * .9997
y1 = y1 * .9997
flip[cnt] = 550 - cnt ' Reverse Z coordinates and add offset
next
end function
function Point3d( x,z )
dim slope = YSlope[round(z)] , x2
dim slopex = XSlope[round(z)]
x2 = 600 - x
x = slopex * x2 + 400
z = z * slope
z = flip[round(z)] ' 1 = bottom higher numbers of z get
end function
function Line3d(x1,z1,x2,z2)
dim x10,z10,x20,z20
x10=x1:x20=x2:z10 = z1 : z20 = z2
Point3d( x10,z10 )
Point3d( x20,z20 )
line(x10,z10,x20,z20)
end function
function quad(x1,z1,x2,z2,x3,z3,x4,z4)
Line(x1,z1,x2,z2) ' x1 = bottom left x2 = bottom right x3 = top right x4 = top left
Line(x2,z2,x3,z3)
Line(x3,z3,x4,z4)
Line(x1,z1,x4,z4)
end function
function LineQuad(x1,z1,x2,z2,x3,z3,x4,z4)
dim x10,z10,x20,z20,x30,z30,x40,z40
x10=x1:z10=z1:x20=x2:z20=z2:x30=x3:z30=z3:x40=x4:z40=z4
Point3d(x10,z10)
Point3d(x20,z20)
Point3d(x30,z30)
Point3d(x40,z40)
polyline(x10,z10,x20,z20,x30,z30,x40,z40)
end function
function SolidQuad(x1,z1,x2,z2,x3,z3,x4,z4)
dim x10,z10,x20,z20,x30,z30,x40,z40
x10=x1:z10=z1:x20=x2:z20=z2:x30=x3:z30=z3:x40=x4:z40=z4
Point3d(x10,z10)
Point3d(x20,z20)
Point3d(x30,z30)
Point3d(x40,z40)
polygon(x10,z10,x20,z20,x30,z30,x40,z40)
end function
function Zboard()
dim lngth = 100 , start = 300
Dim x1 = start , x2 = start - lngth ,x3 = start - lngth ,x4 = start ,z1 = 1 ,z2 = 1 ,z3 = lngth * tilt,z4 = lngth * tilt ,clr = 2
Dim row = 1 , column
while row < 9
clr = clr + 1
if clr > 2 then
clr = 1
end if
for column = 1 to 8
if clr = 1 then
ink ( rgb(0,230,230))
clr = 2
else
ink( rgb(200,255,255) )
clr = 1
end if
SolidQuad(x1,z1,x2,z2,x3,z3,x4,z4)
ink ( rgb(0,0,255) )
LineQuad(x1,z1,x2,z2,x3,z3,x4,z4)
x1 = x1 + lngth
x2 = x2 + lngth
x3 = x3 + lngth
x4 = x4 + lngth
next
x1 = start : x2 = start - lngth : x3 = start - lngth : x4 = start
z1 = z1 + lngth * tilt
z2 = z2 + lngth * tilt
z3 = z3 + lngth * tilt
z4 = z4 + lngth * tilt
row = row + 1
wend
end function
SetConversion()
ink ( rgb(255,255,255) )
' cnt = 0
while not key( k_esc )
cls
wait(20)
Zboard()
Zprint()
ink ( rgb(255,255,255))
text ( 0,0,16,"Press Escape Key to exit ")
text(20,40,16,mouseX)
text(20,60,16,mouseY)
m1 = mouseY
if m1<1 then
m1 = 1
end if
text ( 20,80,16,flip[m1] )
'Squad(200,200,400,200,400,200,200,400)
screenswap
wait(20)
wend
end
