Another small filled circe sub (not as fast as fcirc)

[bplus]

Holy ship! FC2 edges out fcirc!

Code: (Select All)

'FC.BAS
'Dav, AUG/2024 bplus mod 2024-08-28  try faster FC2 mod of fc

'fc & fcirc circle fill test.
'testing two filled circle SUB's for the fastest one.
'draws 100,000 circles and compares speed.

'fcirc still reigns as fastest on my laptop, by a little.

Screen _NewImage(1000, 700, 32)
_ScreenMove 150, 0
Randomize Timer
Print "Overlapping lines check of FC2"
FC2 500, 350, 300, &H200000FF ' check for overlapping lines
Print "Looking good! no lighter lines." ' FC passes too BTW
Print: Print " zzz... press any for timed test"
Sleep

'time the fc sub
t# = Timer
For c = 1 To 200000
    fcirc Rnd * _Width, Rnd * _Height, 35, _RGB(Rnd * 255, Rnd * 255, Rnd * 255)
Next
t1# = Timer - t#

'time the fc2 sub
t# = Timer
For c = 1 To 200000
    FC2 Rnd * _Width, Rnd * _Height, 35, _RGB(Rnd * 255, Rnd * 255, Rnd * 255)
Next
t2# = Timer - t#

Print
Print "fcirc ="; t1#
Print "  FC2 ="; t2#
Print

If t2# < t1# Then
    Print "FC2 wins!"
Else
    Print "fcirc wins!"
End If

Sub fc (cx, cy, r, clr&)
    For y = -r To r
        x = Int(Sqr(r * r - y * y))
        Line (cx - x, cy + y)-(cx + x, cy + y), clr&, BF
    Next
End Sub

Sub FC2 (cx, cy, r, clr&)
    Line (cx - r, cy)-(cx + r, cy), clr&, BF
    For y = 1 To r
        x = Int(Sqr(r * r - y * y))
        Line (cx - x, cy + y)-(cx + x, cy + y), clr&, BF
        Line (cx - x, cy - y)-(cx + x, cy - y), clr&, BF
    Next
End Sub


Sub fcirc (CX As Integer, CY As Integer, R As Integer, C As _Unsigned Long)
    Dim Radius As Integer, RadiusError As Integer
    Dim X As Integer, Y As Integer
    Radius = Abs(R): RadiusError = -Radius: X = Radius: Y = 0
    If Radius = 0 Then PSet (CX, CY), C: Exit Sub
    Line (CX - X, CY)-(CX + X, CY), C, BF
    While X > Y
        RadiusError = RadiusError + Y * 2 + 1
        If RadiusError >= 0 Then
            If X <> Y + 1 Then
                Line (CX - Y, CY - X)-(CX + Y, CY - X), C, BF
                Line (CX - Y, CY + X)-(CX + Y, CY + X), C, BF
            End If
            X = X - 1
            RadiusError = RadiusError - X * 2
        End If
        Y = Y + 1
        Line (CX - X, CY - Y)-(CX + X, CY - Y), C, BF
        Line (CX - X, CY + Y)-(CX + X, CY + Y), C, BF
    Wend
End Sub