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change n to $fn for round vnf textures; descriptive error message for

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abuse of n= or tex_samples
This commit is contained in:
Adrian Mariano 2024-01-10 23:55:51 -05:00
parent e9c08b4fbf
commit 8781fa1e93
3 changed files with 43 additions and 26 deletions
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2
shapes3d.scad
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@ -1365,7 +1365,7 @@ function cylinder(h, r1, r2, center, r, d, d1, d2, anchor, spin=0, orient=UP) =
// tex_size = An optional 2D target size for the textures. Actual texture sizes will be scaled somewhat to evenly fit the available surface. Default: `[5,5]`
// tex_reps = If given instead of tex_size, a 2-vector giving the number of texture tile repetitions in the horizontal and vertical directions.
// tex_inset = If numeric, lowers the texture into the surface by the specified proportion, e.g. 0.5 would lower it half way into the surface. If `true`, insets by exactly its full depth. Default: `false`
// tex_rot = Rotate texture by specified angle, which must be a multiple of 90 degrees. A value of true is equivalent to 90 deg, and false to 0. Default: 0
// tex_rot = Rotate texture by specified angle, which must be a multiple of 90 degrees. Default: 0
// tex_depth = Specify texture depth; if negative, invert the texture. Default: 1.
// tex_samples = Minimum number of "bend points" to have in VNF texture tiles. Default: 8
// tex_taper = If given as a number, tapers the texture height to zero over the first and last given percentage of the path. If given as a lookup table with indices between 0 and 100, uses the percentage lookup table to ramp the texture heights. Default: `undef` (no taper)

66
skin.scad
View file

@ -547,7 +547,7 @@ function skin(profiles, slices, refine=1, method="direct", sampling, caps, close
// tex_size = An optional 2D target size for the textures. Actual texture sizes will be scaled somewhat to evenly fit the available surface. Default: `[5,5]`
// tex_reps = If given instead of tex_size, a 2-vector giving the number of texture tile repetitions in the horizontal and vertical directions on the extrusion.
// tex_inset = If numeric, lowers the texture into the surface by the specified proportion, e.g. 0.5 would lower it half way into the surface. If `true`, insets by exactly its full depth. Default: `false`
// tex_rot = Rotate texture by specified angle, which must be a multiple of 90 degrees. A value of true is equivalent to 90 deg, and false to 0. Default: 0
// tex_rot = Rotate texture by specified angle, which must be a multiple of 90 degrees. Default: 0
// tex_depth = Specify texture depth; if negative, invert the texture. Default: 1.
// tex_samples = Minimum number of "bend points" to have in VNF texture tiles. Default: 8
// style = The style to use when triangulating the surface of the object. Valid values are `"default"`, `"alt"`, or `"quincunx"`.
@ -873,7 +873,7 @@ function linear_sweep(
// tex_size = An optional 2D target size for the textures. Actual texture sizes will be scaled somewhat to evenly fit the available surface. Default: `[5,5]`
// tex_reps = If given instead of tex_size, a 2-vector giving the number of texture tile repetitions in the direction perpendicular to extrusion and in the direction parallel to extrusion.
// tex_inset = If numeric, lowers the texture into the surface by the specified proportion, e.g. 0.5 would lower it half way into the surface. If `true`, insets by exactly its full depth. Default: `false`
// tex_rot = Rotate texture by specified angle, which must be a multiple of 90 degrees. A value of true is equivalent to 90 deg, and false to 0. Default: 0
// tex_rot = Rotate texture by specified angle, which must be a multiple of 90 degrees. Default: 0
// tex_depth = Specify texture depth; if negative, invert the texture. Default: 1.
// tex_samples = Minimum number of "bend points" to have in VNF texture tiles. Default: 8
// style = {{vnf_vertex_array()}} style. Default: "min_edge"
@ -2875,13 +2875,13 @@ function associate_vertices(polygons, split, curpoly=0) =
// - VNF Tile textures, which are VNFs that cover the unit square [0,0] x [1,1]. These tend to be slower to render, but allow greater flexibility and precision for shapes that don't align with a grid.
// .
// In the descriptions below, imagine the textures positioned on the XY plane, so "horizontal" refers to the "sideways" dimensions of the texture and
// "up" and "down" refer to the depth dimension. If a texture is placed on a cylinder the "depth" will become the radial direction and the "horizontal"
// "up" and "down" refer to the depth dimension, perpendicular to the surface being textured. If a texture is placed on a cylinder the "depth" will become the radial direction and the "horizontal"
// direction will be the vertical and tangential directions on the cylindrical surface. All horizontal dimensions for VNF textures are relative to the unit square
// on which the textures are defined, so a value of 0.25 for a gap or inset will refer to 1/4 of the texture's full length and/or width. All supported textures appear below in the examples.
// on which the textures are defined, so a value of 0.25 for a gap or border will refer to 1/4 of the texture's full length and/or width. All supported textures appear below in the examples.
// Arguments:
// tex = The name of the texture to get.
// ---
// n = The general number of vertices to use to refine the resolution of the texture.
// n = The number of samples to use for defining a heightfield texture. Depending on the texture, result will be either n x n or 1 x n. Not allowed for VNF textures. See the `tex_samples` argument to {{cyl()}}, {{linear_sweep()}} and {{rotate_sweep()}} for controlling the sampling of VNF textures.
// border = The size of a border region on some VNF tile textures. Generally between 0 and 0.5.
// gap = The gap between logically distinct parts of some VNF tiles. (ie: gap between bricks, gap between truncated ribs, etc.)
// roughness = The amount of roughness used on the surface of some heightfield textures. Generally between 0 and 0.5.
@ -2915,8 +2915,8 @@ function associate_vertices(polygons, split, curpoly=0) =
// rect(30), texture=tex, h=30,
// tex_size=[10,10]
// );
// Example(3D): **"cones"** (VNF) = Raised conical spikes. Giving `n=` sets `$fn` for the cone (will be rounded to a multiple of 4). Default: 16. Giving `border=` specifies the horizontal border width between the edge of the tile and the base of the cone. The `border` value must be nonnegative and smaller than 0.5. Default: 0.
// tex = texture("cones");
// Example(3D): **"cones"** (VNF) = Raised conical spikes. Specify `$fn` to set the number of segments on the cone (will be rounded to a multiple of 4). If you use $fa and $fs then the number of segments is determined for the original VNF scale of 1x1. Giving `border=` specifies the horizontal border width between the edge of the tile and the base of the cone. The `border` value must be nonnegative and smaller than 0.5. Default: 0.
// tex = texture("cones", $fn=16);
// linear_sweep(
// rect(30), texture=tex, h=30, tex_depth=3,
// tex_size=[10,10]
@ -2957,13 +2957,13 @@ function associate_vertices(polygons, split, curpoly=0) =
// rect(30), texture=tex, h=30,
// tex_size=[10,10]
// );
// Example(3D): **"dimples"** (VNF) = Round divots. Giving `n=` sets `$fn` for the curve (will be rounded to a multiple of 4). Default: 16. Giving `border=` specifies the horizontal width of the flat border region between the tile edges and the edge of the dimple. Must be nonnegative and strictly less than 0.5. Default: 0.05.
// Example(3D): **"dimples"** (VNF) = Round divots. Specify `$fn` to set the number of segments on the cone (will be rounded to a multiple of 4). If you use $fa and $fs then the number of segments is determined for the original VNF scale of 1x1. Giving `border=` specifies the horizontal width of the flat border region between the tile edges and the edge of the dimple. Must be nonnegative and strictly less than 0.5. Default: 0.05.
// tex = texture("dimples");
// linear_sweep(
// rect(30), texture=tex, h=30,
// tex_size=[10,10]
// );
// Example(3D): **"dots"** (VNF) = Raised round bumps. Giving `n=` sets `$fn` for the curve (will be rounded to a multiple of 4). Default: 16. Giving `border=` specifies the horizontal width of the flat border region between the tile edge and the edge of the dots. Must be nonnegative and strictly less than 0.5. Default: 0.05.
// Example(3D): **"dots"** (VNF) = Raised round bumps. Specify `$fn` to set the number of segments on the cone (will be rounded to a multiple of 4). If you use $fa and $fs then the number of segments is determined for the original VNF scale of 1x1. Giving `border=` specifies the horizontal width of the flat border region between the tile edge and the edge of the dots. Must be nonnegative and strictly less than 0.5. Default: 0.05.
// tex = texture("dots");
// linear_sweep(
// rect(30), texture=tex, h=30,
@ -3103,6 +3103,9 @@ function associate_vertices(polygons, split, curpoly=0) =
// tex_size=[10,10], tex_depth=3, style="concave"
// );
__vnf_no_n_mesg=" texture is a VNF so it does not accept n. Set sample rate for VNF textures using the tex_samples parameter to cyl(), linear_sweep() or rotate_sweep().";
function texture(tex, n, border, gap, roughness, inset) =
assert(num_defined([border,inset])<2, "In texture() the 'inset' parameter has been replaced by 'border'. You cannot give both parameters.")
let(
@ -3134,7 +3137,7 @@ function texture(tex, n, border, gap, roughness, inset) =
each lerpn(1,0,n/4,endpoint=false),
]] :
tex=="trunc_ribs_vnf"?
assert(is_undef(n), "trunc_ribs_vnf texture does not accept n")
assert(is_undef(n), str(tex,__vnf_no_n_mesg))
let(
border = default(border,1/4)*2,
gap = default(gap,1/4)
@ -3180,7 +3183,8 @@ function texture(tex, n, border, gap, roughness, inset) =
],
] :
tex=="diamonds_vnf"?
assert(num_defined([n,gap, border, roughness])==0, "diamonds_vnf texture does not accept n, gap, border or roughness")
assert(is_undef(n), str(tex,__vnf_no_n_mesg))
assert(num_defined([gap, border, roughness])==0, "diamonds_vnf texture does not accept gap, border or roughness")
[
[
[0, 1, 1], [1/2, 1, 0], [1, 1, 1],
@ -3202,7 +3206,8 @@ function texture(tex, n, border, gap, roughness, inset) =
]
] :
tex=="pyramids_vnf"?
assert(num_defined([n,gap, border, roughness])==0, "pyramids_Vnf texture does not accept n, gap, border or roughness")
assert(is_undef(n), str(tex,__vnf_no_n_mesg))
assert(num_defined([gap, border, roughness])==0, "pyramids_vnf texture does not accept gap, border or roughness")
[
[ [0,1,0], [1,1,0], [1/2,1/2,1], [0,0,0], [1,0,0] ],
[ [2,0,1], [2,1,4], [2,4,3], [2,3,0] ]
@ -3218,7 +3223,8 @@ function texture(tex, n, border, gap, roughness, inset) =
]
] :
tex=="trunc_pyramids_vnf"?
assert(num_defined([gap, n, roughness])==0, "trunc_pyramids_vnf texture does not accept gap, n or roughness")
assert(is_undef(n), str(tex,__vnf_no_n_mesg))
assert(num_defined([gap, roughness])==0, "trunc_pyramids_vnf texture does not accept gap, or roughness")
let(
border = default(border,0.1)
)
@ -3260,7 +3266,8 @@ function texture(tex, n, border, gap, roughness, inset) =
]
] :
tex=="bricks_vnf"?
assert(num_defined([n,roughness])==0, "bricks_vnf texture does not accept n or roughness")
assert(is_undef(n), str(tex,__vnf_no_n_mesg))
assert(num_defined([roughness])==0, "bricks_vnf texture does not accept roughness")
let(
border = default(border,0.05),
gap = default(gap,0.05)
@ -3290,7 +3297,8 @@ function texture(tex, n, border, gap, roughness, inset) =
]
] :
tex=="checkers"?
assert(num_defined([gap, n, roughness])==0, "checkers texture does not accept gap, n or roughness")
assert(is_undef(n), str(tex,__vnf_no_n_mesg))
assert(num_defined([gap, roughness])==0, "checkers texture does not accept gap, or roughness")
let(
border = default(border,0.05)
)
@ -3318,10 +3326,11 @@ function texture(tex, n, border, gap, roughness, inset) =
]
] :
tex=="cones"?
assert(is_undef(n),str("To set number of segments on cones use $fn. ", tex,__vnf_no_n_mesg))
assert(num_defined([gap,roughness])==0, "cones texture does not accept gap or roughness")
let(
n = quant(default(n,16),4),
border = default(border,0)
border = default(border,0),
n = quant(segs(1/2-border),4)
)
assert(border>=0 && border<0.5)
[
@ -3336,7 +3345,8 @@ function texture(tex, n, border, gap, roughness, inset) =
]
] :
tex=="cubes"?
assert(num_defined([n, gap, border, roughness])==0, "cubes texture does not accept n, gap, border or roughness")
assert(is_undef(n), str(tex,__vnf_no_n_mesg))
assert(num_defined([gap, border, roughness])==0, "cubes texture does not accept gap, border or roughness")
[
[
[0,1,1/2], [1,1,1/2], [1/2,5/6,1], [0,4/6,0], [1,4/6,0],
@ -3349,7 +3359,8 @@ function texture(tex, n, border, gap, roughness, inset) =
]
] :
tex=="trunc_diamonds"?
assert(num_defined([gap, n, roughness])==0, "trunc_diamonds texture does not accept gap, n or roughness")
assert(is_undef(n), str(tex,__vnf_no_n_mesg))
assert(num_defined([gap, roughness])==0, "trunc_diamonds texture does not accept gap or roughness")
let(
border = default(border,0.1)/sqrt(2)*2
)
@ -3368,10 +3379,11 @@ function texture(tex, n, border, gap, roughness, inset) =
]
] :
tex=="dimples" || tex=="dots" ?
assert(is_undef(n),str("To set number of segments on ",tex," use $fn. ", tex,__vnf_no_n_mesg))
assert(num_defined([gap,roughness])==0, str(tex," texture does not accept gap or roughness"))
let(
n = quant(default(n,16),4),
border = default(border,0.05)
border = default(border,0.05),
n = quant(segs(1/2-border),4)
)
assert(border>=0 && border < 0.5)
let(
@ -3401,7 +3413,8 @@ function texture(tex, n, border, gap, roughness, inset) =
]
) [verts, faces] :
tex=="tri_grid"?
assert(num_defined([gap, n, roughness])==0, str(tex," texture does not accept gap, n or roughness"))
assert(is_undef(n), str(tex,__vnf_no_n_mesg))
assert(num_defined([gap, roughness])==0, str(tex," texture does not accept gap or roughness"))
let(
border = default(border,0.05)*sqrt(3)
)
@ -3439,7 +3452,8 @@ function texture(tex, n, border, gap, roughness, inset) =
]
] :
tex=="hex_grid"?
assert(num_defined([gap, n, roughness])==0, str(tex," texture does not accept gap, n or roughness"))
assert(is_undef(n), str(tex,__vnf_no_n_mesg))
assert(num_defined([gap, roughness])==0, str(tex," texture does not accept gap or roughness"))
let(
border=default(border,0.1)
)
@ -3574,7 +3588,7 @@ function _validate_texture(texture) =
function _textured_linear_sweep(
region, texture, tex_size=[5,5],
h, counts, inset=false, rot=false,
h, counts, inset=false, rot=0,
tex_scale=1, twist, scale, shift,
style="min_edge", l, caps=true,
height, length, samples,
@ -3590,6 +3604,8 @@ function _textured_linear_sweep(
caps = is_bool(caps) ? [caps,caps] : caps,
regions = is_path(region,2)? [[region]] : region_parts(region),
tex = is_string(texture)? texture(texture) : texture,
dummy = assert(is_undef(samples) || is_vnf(tex), "You gave the tex_samples argument with a heightfield texture, which is not permitted. Use the n= argument to texture() instead"),
dummy2=is_bool(rot)?echo("boolean value for tex_rot is deprecated. Use a numerical angle, one of 0, 90, 180, or 270.")0:0,
texture = !rot? tex :
is_vnf(tex)? zrot(is_num(rot)?rot:90, cp=[1/2,1/2], p=tex) :
rot==180? reverse([for (row=tex) reverse(row)]) :
@ -3863,6 +3879,8 @@ function _textured_revolution(
assert(closed || is_path(shape,2))
let(
tex = is_string(texture)? texture(texture) : texture,
dummy = assert(is_undef(samples) || is_vnf(tex), "You gave the tex_samples argument with a heightfield texture, which is not permitted. Use the n= argument to texture() instead"),
dummy2=is_bool(rot)?echo("boolean value for tex_rot is deprecated. Use a numerical angle, one of 0, 90, 180, or 270.")0:0,
texture = !rot? tex :
is_vnf(tex)? zrot(is_num(rot)?rot:90, cp=[1/2,1/2], p=tex) :
rot==180? reverse([for (row=tex) reverse(row)]) :

1
utility.scad
View file

@ -766,7 +766,6 @@ function scalar_vec3(v, dflt) =
is_list(v)? [for (i=[0:2]) default(v[i], default(dflt, 0))] :
!is_undef(dflt)? [v,dflt,dflt] : [v,v,v];
// Function: segs()
// Synopsis: Returns the number of sides for a circle given `$fn`, `$fa`, and `$fs`.
// Topics: Geometry