A circular fillet edge span, for a circular node.

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A circular fillet edge span, for a circular node. This is simply a circular arc from the connection to the point where it is tangent to the circular node.

Vec fcenter

Center of the circle of which the arc is taken

float frad

Radius of the arc

Vec dirTang

The direction vector from the center of the node to the point where the two circles are tangent

float dtsign

The sign: calculate cross product of a vector with dirTang, if sign is same as here, then we it is on the same side as the arc

float astart

The start angle of the arc, looking from fcenter

float aend

The end angle of the arc, looking from fcenter

void cutEnd(Vec dir)

For blending, we want to stop the fillet halfway to avoid overdraw and strange shapes while cleaving

bool infillet(Vec dir) const

Whether the given direction vector from the center of the node is inside the fillet.

bool overlaps(const CircleCircleFillet &other) const

Returns true if either of the directions where the circles are tangent is inside the other fillet area.

Vec fcenter

Center of the circle of which the arc is taken

float frad

Radius of the arc

Vec dirTang

The direction vector from the center of the node to the point where the two circles are tangent

float dtsign

The sign: calculate cross product of a vector with dirTang, if sign is same as here, then we it is on the same side as the arc

float astart

The start angle of the arc, looking from fcenter

float aend

The end angle of the arc, looking from fcenter

void cutEnd(Vec dir)

For blending, we want to stop the fillet halfway to avoid overdraw and strange shapes while cleaving

bool infillet(Vec dir) const

Whether the given direction vector from the center of the node is inside the fillet. This does *not* guarantee that point(dir) will be a success: this function includes vectors inside the connection to the fillet but point() naturally does not.

bool overlaps(const CircleCircleFillet &other) const

Returns true if either of the directions where the circles are tangent is inside the other fillet area. This is not *quite* the same as the trivial definition of overlapping: it returns false if the tangent points are past the connections.

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