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Fix missing reference, add figure for 2d directions

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Adrian Mariano 2022-02-12 20:05:30 -05:00
parent 8dc288b62c
commit 1a22305191
1 changed files with 32 additions and 7 deletions
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@ -58,21 +58,28 @@ _ANCHOR_TYPES = ["intersect","hull"];
// An anchor can be referred to in one of two ways; as a directional vector, or as a named anchor string.
// .
// When given as a vector, it points, in a general way, towards the face, edge, or corner of the
// object that you want the anchor for, relative to the center of the object. There are directional
// constants with names like `TOP`, `BOTTOM`, `LEFT`, `RIGHT` and `BACK` that you can add together
// to specify an anchor point. See ?????? below for the full list of pre-defined directional constants.
// object that you want the anchor for, relative to the center of the object. You can simply
// specify a vector like `[0,0,1]` to anchor an object at the Z+ end, but you can also use
// directional constants with names like `TOP`, `BOTTOM`, `LEFT`, `RIGHT` and `BACK` that you can add together
// to specify anchor points. See [specifying directions](subsection-specifying-directions)
// below for the full list of pre-defined directional constants.
// .
// For example:
// - `[0,0,1]` is the same as `TOP` and refers to the center of the top face.
// - `[-1,0,1]` is the same as `TOP+LEFT`, and refers to the center of the top-left edge.
// - `[1,1,-1]` is the same as `BOTTOM+BACK+RIGHT`, and refers to the bottom-back-right corner.
// .
// When the object is cylindrical, conical, or spherical in nature, the anchors will be located
// around the surface of the cylinder, cone, or sphere, relative to the center. The direction of a
// face anchor will be perpendicular to the face, pointing outward. The direction of a edge anchor
// When the object is cubical or rectangular in shape the anchors must have zero or one values
// for their components and they refer to the face centers, edge centers, or corners of the object.
// The direction of a face anchor will be perpendicular to the face, pointing outward. The direction of a edge anchor
// will be the average of the anchor directions of the two faces the edge is between. The direction
// of a corner anchor will be the average of the anchor directions of the three faces the corner is
// on. The spin of all standard anchors is 0.
// on.
// .
// When the object is cylindrical, conical, or spherical in nature, the anchors will be located
// around the surface of the cylinder, cone, or sphere, relative to the center.
// You can generally use an arbitrary vector to get an anchor positioned anywhere on the curved
// surface of such an object, and the anchor direction will be the surface normal at the anchor location.
// .
// Some more complex objects, like screws and stepper motors, have named anchors to refer to places
// on the object that are not at one of the standard faces, edges or corners. For example, stepper
@ -125,6 +132,24 @@ _ANCHOR_TYPES = ["intersect","hull"];
// up(.12)move(TOP) text3d("TOP",size=.1,h=.01,anchor=RIGHT,orient=FRONT);
// move(TOP) text3d("UP",size=.1,h=.01,anchor=RIGHT,orient=FRONT);
// }
// Figure(2D,Big): Named constants for direction vectors in 2D. Some directions have more than one name.
// $fn=12;
// stroke(path2d([[0,0,0],RIGHT]), endcap2="arrow2", width=.05);
// color("black")fwd(.22)left(.05)move(RIGHT) text("RIGHT",size=.1,anchor=RIGHT);
// stroke(path2d([[0,0,0],LEFT]), endcap2="arrow2", width=.05);
// color("black")right(.05)fwd(.22)move(LEFT) text("LEFT",size=.1,anchor=LEFT);
// stroke(path2d([[0,0,0],FRONT]), endcap2="arrow2", width=.05);
// color("black")
// fwd(.2)
// right(.15)
// color("black")move(BACK) text("BACK",size=.1,anchor=LEFT);
// color("black")
// left(.15)back(.2){
// back(.12)move(FRONT) text("FRONT",size=.1,anchor=RIGHT);
// move(FRONT) text("FWD",size=.1,anchor=RIGHT);
// fwd(.12)move(FRONT) text("FORWARD",size=.1,anchor=RIGHT);
// }
// stroke(path2d([[0,0,0],BACK]), endcap2="arrow2", width=.05);
// Subsection: Specifying Faces
// Modules operating on faces accept a list of faces to describe the faces to operate on. Each
// face is given by a vector that points to that face. Attachments of cuboid objects onto their faces also