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Draw a sphere: Difference between revisions
→DarkBASIC
Line 263:
<lang darkbasic>MAKE OBJECT SPHERE 1,1</lang>
==={{header|FreeBASIC}}===
<lang fb>'Sphere for FreeBASIC May 2015
'spherefb4.bas
'Sphere using XPL0 code from rossetacode sphere page
'
screenres 640,480,32 '\set 640x480x32 graphics mode
windowtitle "32 bpp Blue Sphere FreeBASIC"
'
' wait until keypress
locate 50,2
color(rgb(255,255,255),rgb(0,0,0))
Print "Enter any key to start"
sleep
R=100 : R2=R*R '\radius, in pixels; radius squared
X0=640/2 : Y0=480/2 '\coordinates of center of screen
dim as integer X, Y, Z, C, D2 '\coords, color, distance from center squared
'
for Y= -R to +R '\for all the coordinates near the circle
for X = -R to +R '\ which is under the sphere
D2 = X*X + Y*Y '
C = 0 '\default color is black
if D2 <= R2 then '\coordinate is inside circle under sphere
Z = sqr(R2-D2) '\height of point on surface of sphere above X,Y
C = Z-(X+Y)/2+130 ' \color is proportional; offset X and Y, and
endif
color c ' \ shift color to upper limit of its range
'\green + blue = cyan orginal line don't understand
Pset(X+X0, Y+Y0)
next x
next y
'
' wait until keypress
locate 50,2
color(rgb(255,255,255),rgb(0,0,0))
Print "Enter any key to exit "
sleep
END</lang>
===[[QBasic]]===
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