transbeam/resources/transbeam-common.asy

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struct transbeamPrefs {
real triangleRadius;
real borderInset;
real circleRadius;
real bigBeamRadius;
real smallBeamRadius;
real beamCount;
real beamAngle;
real starterBeamAngle;
}
void drawTransbeam(transbeamPrefs prefs) {
unravel prefs;
pen transBlue = rgb("55cdfc");
pen transPink = rgb("f7a8b8");
pen bigBeamColor = transPink;
pen smallBeamColor = transBlue;
path borderTriangle = dir(90)--dir(210)--dir(330)--cycle;
path outerBorder = scale(triangleRadius)*borderTriangle;
fill(outerBorder, white);
path beam(real angle, real innerRadius, real outerRadius) {
return arc((0,0), outerRadius, angle/2, -angle/2)--arc((0,0), innerRadius, -angle/2, angle/2)--cycle;
}
path bigBeam = beam(beamAngle, circleRadius, bigBeamRadius);
path smallBeam = beam(beamAngle, circleRadius, smallBeamRadius);
for (int i = 0; i < beamCount; ++i) {
if (i > 0) {
fill(rotate(360*i/beamCount)*bigBeam, bigBeamColor);
}
fill(rotate(360*(i+0.5)/beamCount)*smallBeam, smallBeamColor);
}
pair starterBeamTrianglePoint(real angle) {
pair circlePoint = circleRadius*dir(angle);
return intersectionpoint(circlePoint--(circlePoint+(triangleRadius,0)), outerBorder);
}
fill(starterBeamTrianglePoint(-starterBeamAngle/2)--arc((0,0), circleRadius, -starterBeamAngle/2, starterBeamAngle/2)--starterBeamTrianglePoint(starterBeamAngle/2)--cycle, bigBeamColor);
draw(outerBorder, transPink+(2*borderInset));
draw(scale(triangleRadius-borderInset)*borderTriangle, transBlue+borderInset);
}