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Minor construction bugfixes in textured_revolution().
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1 changed files with 33 additions and 9 deletions
42
skin.scad
42
skin.scad
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@ -2819,7 +2819,7 @@ function _find_vnf_tile_bottom_edge_path(vnf, val) =
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// [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
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// ];
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// path = arc(cp=[0,0], r=40, start=60, angle=-120);
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// textured_revolution(path, tex, tex_size=[20,20], tscale=1, style="concave");
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// textured_revolution(path, closed=false, texture=tex, tex_size=[20,20], tscale=1, style="concave");
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// Example:
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// include <BOSL2/beziers.scad>
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// bezpath = [
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@ -2829,7 +2829,7 @@ function _find_vnf_tile_bottom_edge_path(vnf, val) =
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// [10,-15], [15,-30]
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// ];
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// path = bezpath_curve(bezpath, splinesteps=32);
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// textured_revolution(path, "diamonds", tex_size=[5,5], tscale=1, style="concave");
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// textured_revolution(path, closed=false, texture="diamonds", tex_size=[10,10], tscale=1, style="concave");
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// Example:
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// path = [
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// [20, 30], [20, 20],
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@ -2838,6 +2838,12 @@ function _find_vnf_tile_bottom_edge_path(vnf, val) =
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// ];
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// vnf = textured_revolution(path, closed=false, texture="trunc_pyramids", tex_size=[5,5], tscale=1, style="convex");
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// vnf_polyhedron(vnf, convexity=10);
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// Example:
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// rgn = [
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// right(40, p=circle(d=50)),
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// right(40, p=circle(d=40,$fn=6)),
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// ];
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// textured_revolution(rgn, texture="diamonds", tex_size=[10,10], tscale=1, angle=240, style="concave");
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function textured_revolution(
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shape, texture, tex_size, tscale=1,
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inset=false, rot=false,
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@ -2972,7 +2978,7 @@ function textured_revolution(
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])
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) vnf_vertex_array(
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tiles, caps=false, style=style,
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col_wrap=(angle==360), row_wrap=closed
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col_wrap=false, row_wrap=closed
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)
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) vnf
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]),
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@ -2988,7 +2994,9 @@ function textured_revolution(
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counts_y = is_vector(counts,2)? counts.y :
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is_vector(tex_size,2)? max(1,round(plen/tex_size.y)) : 6,
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obases = resample_path(path, n=counts_y * samples + (closed?0:1), closed=closed),
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onorms = path_normals(obases, closed=closed),
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bases = closed? close_path(obases) : obases,
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norms = closed? close_path(onorms) : onorms,
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ppath = is_vnf(texture)
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? [ // VNF tile texture
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for (j = [0:1:counts_y-1])
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@ -2996,9 +3004,17 @@ function textured_revolution(
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if (vert.x == 0) let(
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part = (j + vert.y) * samples,
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u = floor(part),
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uu = part - u
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)
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lerp(select(bases,u), select(bases,u+1), uu)
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uu = part - u,
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tscale =
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closed? tscale :
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!closed && j==0 && approx(vert.y,0)? 0 :
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!closed && j==counts_y-1 && approx(vert.y,1)? 0 :
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tscale,
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base = lerp(select(bases,u), select(bases,u+1), uu),
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norm = unit(lerp(select(norms,u), select(norms,u+1), uu)),
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texh = (vert.z - inset) * tscale * (base.x / maxx),
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xyz = base - norm * texh
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) xyz
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]
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: let( // Heightfield texture
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texcnt = [len(texture[0]), len(texture)]
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@ -3008,9 +3024,17 @@ function textured_revolution(
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let(
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part = (i + (ti/texcnt.y)) * samples,
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u = floor(part),
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uu = part - u
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)
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lerp(select(bases,u), select(bases,u+1), uu)
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uu = part - u,
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tscale =
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closed? tscale :
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!closed && i==0 && ti==0? 0 :
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!closed && i==counts_y && ti==0? 0 :
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tscale,
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base = lerp(bases[u], select(bases,u+1), uu),
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norm = unit(lerp(norms[u], select(norms,u+1), uu)),
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texh = (texture[ti][0] - inset) * tscale * (base.x / maxx),
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xyz = base - norm * texh
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) xyz
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],
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path = closed? ppath : [
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[0, ppath[0].y],
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