Just a little graphics demo

[James D Jarvis]

A little graphics demo using a simple polygon drawing routine.  If 360 is evenly divisible by the shapedeg variable you get a closed polygon.  This would be speedier without using PAINT but I wanted ROTPOLY to be a simple as possible.

Code: (Select All)

'just playing with a subroutine
Screen _NewImage(800, 600, 32)
Dim klr As _Unsigned Long


For d = 0 To 360
    _Limit 60
    Cls
    klr = _RGB32(d / 2, d / 2, d / 2)
    rotpoly 400, 300, 100, 72, d, klr
    Paint (400, 300), klr, klr
    For n = 0 To 50
        klr = _RGB32(d / 2 + n * 2, d / 4 + n * 2, d / 2 + n * 2)
        rotpoly 400 + n * Sin(0.01745329 * d), 300 + n * Cos(0.01745329 * d), 100 - n, 72, d + n, klr
        Paint (400 + n * Sin(0.01745329 * d), 300 + n * Cos(0.01745329 * d)), klr, klr

        klr2 = _RGB32(d / 2 + n * 2, d / 4 + n * 2, d / 4 + n * 2)
        rotpoly 150 + n * Sin(0.01745329 * d), 150 + n * Cos(0.01745329 * d), 80 - n, 60, d + 30, klr2
        Paint (150 + n * Sin(0.01745329 * d), 150 + n * Cos(0.01745329 * d)), klr2, klr2

        klr3 = _RGB32(d / 4 + n * 2, d / 4 + n * 2, d / 2 + n * 2)
        rotpoly 600 + n * Sin(0.01745329 * d), 100 + n * Cos(0.01745329 * d), 90 - n, 90, d + n, klr3
        Paint (600 + n * Sin(0.01745329 * d), 100 + n * Cos(0.01745329 * d)), klr3, klr3

        klr4 = _RGB32(n * 2 + 30, d / 2 + 20, d / 2)
        rotpoly 600 + n * Sin(0.01745329 * d), 400 + n * Cos(0.01745329 * d), 90 - n, 6, (d + n) * 2, klr4
        Paint (600 + n * Sin(0.01745329 * d), 400 + n * Cos(0.01745329 * d)), klr4, klr4

        klr5 = _RGB32(255 - n * 2, 255 - d / 2 + 20, 255 - d / 2)
        rotpoly 120 + n * Sin(0.01745329 * d), 400 + n * Cos(0.01745329 * d), 90 - n, 120, d + n, klr5
        Paint (120 + n * Sin(0.01745329 * d), 400 + n * Cos(0.01745329 * d)), klr5, klr5

        klr6 = _RGB32(n * 2 + 30, d / 2 + 20, d / 2)
        rotpoly 600 + n * Sin(0.01745329 * d), 400 + n * Cos(0.01745329 * d), 90 - n, 6, n * Sin(0.01745329 * d), klr6



    Next




    _Display
Next








Sub rotpoly (cx, cy, rr, shapedeg, turn, klr As _Unsigned Long)
'CX and CY are the center of the polygon
'rr is the outer radius of the polygon
'shapedeg is the angle the polygon will be drawn with
'turn is the degrees the polygon will be draw rotated from it's center
'klr is the color of the line drawn by the polygon
    x = rr * Sin(0.01745329 * turn)
    y = rr * Cos(0.01745329 * turn)
    Line (cx + x, cy + y)-(cx + x, cy + y), klr
    For deg = turn To turn + 360 Step shapedeg
        x2 = rr * Sin(0.01745329 * deg)
        y2 = rr * Cos(0.01745329 * deg)
        Line -(cx + x2, cy + y2), klr
    Next
End Sub