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Make is_path() test for more than one point in a path.

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Revar Desmera
2019-07-10 13:12:32 -07:00
parent e60648dadd
commit d60cd9411f
1 changed files with 4 additions and 3 deletions
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7
geometry.scad
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@@ -341,8 +341,8 @@ function in_front_of_plane(plane, point) =
// Usage: // Usage:
// is_path(x); // is_path(x);
// Description: // Description:
// Returns true if the given item looks like a path. // Returns true if the given item looks like a path. A path is defined as a list of two or more points.
function is_path(x) = is_list(x) && is_vector(x.x); function is_path(x) = is_list(x) && is_vector(x.x) && len(x)>1;
// Function: is_closed_path() // Function: is_closed_path()
@@ -572,7 +572,7 @@ function polygon_clockwise(path) =
// Usage: // Usage:
// is_region(x); // is_region(x);
// Description: // Description:
// Returns true if the given item looks like a region, which is a list of paths. // Returns true if the given item looks like a region. A region is defined as a list of zero or more paths.
function is_region(x) = is_list(x) && is_path(x.x); function is_region(x) = is_list(x) && is_path(x.x);
@@ -1288,6 +1288,7 @@ module region(r)
// heightfield = The 2D rectangular array of heights. // heightfield = The 2D rectangular array of heights.
// size = The [X,Y] size of the surface to create. If given as a scalar, use it for both X and Y sizes. // size = The [X,Y] size of the surface to create. If given as a scalar, use it for both X and Y sizes.
// bottom = The Z coordinate for the bottom of the heightfield object to create. Must be less than the minimum heightfield value. Default: 0 // bottom = The Z coordinate for the bottom of the heightfield object to create. Must be less than the minimum heightfield value. Default: 0
// convexity = Max number of times a line could intersect a wall of the surface being formed.
// Example: // Example:
// heightfield(size=[100,100], bottom=-20, heightfield=[ // heightfield(size=[100,100], bottom=-20, heightfield=[
// for (x=[-180:4:180]) [for(y=[-180:4:180]) 10*cos(3*norm([x,y]))] // for (x=[-180:4:180]) [for(y=[-180:4:180]) 10*cos(3*norm([x,y]))]