//
//
// centerX-- X origin of the spiral.
// centerY-- Y origin of the spiral.
// radius--- Distance from origin to outer arm.
// sides---- Number of points or sides along the spiral's arm.
// coils---- Number of coils or full rotations. (Positive numbers spin clockwise, negative numbers spin counter-clockwise)
// rotation- Overall rotation of the spiral. ('0'=no rotation, '1'=360 degrees, '180/360'=180 degrees)
//
function spiral(centerX, centerY, radius, sides, coils, rotation){
//
with(this){// Draw within the clip calling the function.
//
// Start at the center.
moveTo(centerX, centerY);
//
// How far to step away from center for each side.
var awayStep = radius/sides;
//
// How far to rotate around center for each side.
var aroundStep = coils/sides;// 0 to 1 based.
//
// Convert aroundStep to radians.
var aroundRadians = aroundStep * 2 * Math.PI;
//
// Convert rotation to radians.
rotation *= 2 * Math.PI;
//
// For every side, step around and away from center.
for(var i=1; i<=sides; i++){
//
// How far away from center
var away = i * awayStep;
//
// How far around the center.
var around = i * aroundRadians + rotation;
//
// Convert 'around' and 'away' to X and Y.
var x = centerX + Math.cos(around) * away;
var y = centerY + Math.sin(around) * away;
//
// Now that you know it, do it.
lineTo(x, y);
}
}
}
//
//
//
// spiral(centerX, centerY, radius, sides, coils, rotation).
//
// Big center spirals.
lineStyle(27, 0x0000FF);// Blue.
spiral(250, 210, 200, 200, 4, 0);
lineStyle(27, 0xFF0000);// Red.
spiral(250, 210, 127, 200, 2.5, .5);
//
// Small corner spirals.
lineStyle(4, 0xFF00FF);// Magenta.
spiral(50, 50, 50, 200, 6, 0);// Big.
spiral(125, 50, 25, 200, 2, .5);// Small.
lineStyle(4, 0x00FFFF);// Cyan.
spiral(450, 50, 50, 200, -6, .5);// Big.
spiral(375, 50, 25, 200, -2, 0);// Small.
lineStyle(4, 0xFFFF00);// Yellow.
spiral(50, 350, 50, 200, -4, 0);// Big.
spiral(125, 350, 25, 200, -3, .5);// Small.
lineStyle(4, 0x00FF00);// Green.
spiral(450, 350, 50, 200, 4, .5);// Big.
spiral(375, 350, 25, 200, 3, 0);// Small.
//
//