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Moved heightfield() to shapes.scad.
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Revar Desmera
parent
9aa1cd09e6
commit
81fd73588f
2 changed files with 107 additions and 107 deletions
107
geometry.scad
107
geometry.scad
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@ -1275,112 +1275,5 @@ module region(r)
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}
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// Module: heightfield()
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// Usage:
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// heightfield(heightfield, [size], [bottom]);
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// Description:
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// Given a regular rectangular 2D grid of scalar values, generates a 3D surface where the height at
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// any given point is the scalar value for that position.
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// Arguments:
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// heightfield = The 2D rectangular array of heights.
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// size = The [X,Y] size of the surface to create. If given as a scalar, use it for both X and Y sizes.
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// bottom = The Z coordinate for the bottom of the heightfield object to create. Must be less than the minimum heightfield value. Default: 0
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// convexity = Max number of times a line could intersect a wall of the surface being formed.
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// Example:
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// heightfield(size=[100,100], bottom=-20, heightfield=[
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// for (x=[-180:4:180]) [for(y=[-180:4:180]) 10*cos(3*norm([x,y]))]
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// ]);
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// Example:
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// intersection() {
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// heightfield(size=[100,100], heightfield=[
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// for (x=[-180:5:180]) [for(y=[-180:5:180]) 10+5*cos(3*x)*sin(3*y)]
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// ]);
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// cylinder(h=50,d=100);
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// }
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module heightfield(heightfield, size=[100,100], bottom=0, convexity=10)
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{
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size = is_num(size)? [size,size] : point2d(size);
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dim = array_dim(heightfield);
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assert(dim.x!=undef);
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assert(dim.y!=undef);
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assert(bottom<min(flatten(heightfield)), "bottom must be less than the minimum heightfield value.");
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spacing = vdiv(size,dim-[1,1]);
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vertices = concat(
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[
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for (i=[0:1:dim.x-1], j=[0:1:dim.y-1]) let(
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pos = [i*spacing.x-size.x/2, j*spacing.y-size.y/2, heightfield[i][j]]
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) pos
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], [
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for (i=[0:1:dim.x-1]) let(
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pos = [i*spacing.x-size.x/2, -size.y/2, bottom]
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) pos
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], [
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for (i=[0:1:dim.x-1]) let(
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pos = [i*spacing.x-size.x/2, size.y/2, bottom]
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) pos
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], [
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for (j=[0:1:dim.y-1]) let(
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pos = [-size.x/2, j*spacing.y-size.y/2, bottom]
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) pos
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], [
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for (j=[0:1:dim.y-1]) let(
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pos = [size.x/2, j*spacing.y-size.y/2, bottom]
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) pos
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]
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);
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faces = concat(
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[
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for (i=[0:1:dim.x-2], j=[0:1:dim.y-2]) let(
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idx1 = (i+0)*dim.y + j+0,
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idx2 = (i+0)*dim.y + j+1,
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idx3 = (i+1)*dim.y + j+0,
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idx4 = (i+1)*dim.y + j+1
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) each [[idx1, idx2, idx4], [idx1, idx4, idx3]]
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], [
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for (i=[0:1:dim.x-2]) let(
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idx1 = dim.x*dim.y,
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idx2 = dim.x*dim.y+dim.x+i,
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idx3 = idx2+1
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) [idx1,idx3,idx2]
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], [
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for (i=[0:1:dim.y-2]) let(
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idx1 = dim.x*dim.y,
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idx2 = dim.x*dim.y+dim.x*2+dim.y+i,
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idx3 = idx2+1
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) [idx1,idx2,idx3]
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], [
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for (i=[0:1:dim.x-2]) let(
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idx1 = (i+0)*dim.y+0,
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idx2 = (i+1)*dim.y+0,
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idx3 = dim.x*dim.y+i,
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idx4 = idx3+1
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) each [[idx1, idx2, idx4], [idx1, idx4, idx3]]
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], [
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for (i=[0:1:dim.x-2]) let(
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idx1 = (i+0)*dim.y+dim.y-1,
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idx2 = (i+1)*dim.y+dim.y-1,
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idx3 = dim.x*dim.y+dim.x+i,
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idx4 = idx3+1
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) each [[idx1, idx4, idx2], [idx1, idx3, idx4]]
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], [
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for (j=[0:1:dim.y-2]) let(
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idx1 = j,
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idx2 = j+1,
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idx3 = dim.x*dim.y+dim.x*2+j,
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idx4 = idx3+1
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) each [[idx1, idx4, idx2], [idx1, idx3, idx4]]
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], [
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for (j=[0:1:dim.y-2]) let(
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idx1 = (dim.x-1)*dim.y+j,
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idx2 = idx1+1,
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idx3 = dim.x*dim.y+dim.x*2+dim.y+j,
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idx4 = idx3+1
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) each [[idx1, idx2, idx4], [idx1, idx4, idx3]]
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]
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);
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polyhedron(points=vertices, faces=faces, convexity=convexity);
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}
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// vim: noexpandtab tabstop=4 shiftwidth=4 softtabstop=4 nowrap
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107
shapes.scad
107
shapes.scad
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@ -1379,5 +1379,112 @@ module arced_slot(
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}
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// Module: heightfield()
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// Usage:
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// heightfield(heightfield, [size], [bottom]);
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// Description:
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// Given a regular rectangular 2D grid of scalar values, generates a 3D surface where the height at
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// any given point is the scalar value for that position.
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// Arguments:
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// heightfield = The 2D rectangular array of heights.
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// size = The [X,Y] size of the surface to create. If given as a scalar, use it for both X and Y sizes.
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// bottom = The Z coordinate for the bottom of the heightfield object to create. Must be less than the minimum heightfield value. Default: 0
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// convexity = Max number of times a line could intersect a wall of the surface being formed.
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// Example:
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// heightfield(size=[100,100], bottom=-20, heightfield=[
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// for (x=[-180:4:180]) [for(y=[-180:4:180]) 10*cos(3*norm([x,y]))]
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// ]);
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// Example:
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// intersection() {
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// heightfield(size=[100,100], heightfield=[
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// for (x=[-180:5:180]) [for(y=[-180:5:180]) 10+5*cos(3*x)*sin(3*y)]
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// ]);
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// cylinder(h=50,d=100);
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// }
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module heightfield(heightfield, size=[100,100], bottom=0, convexity=10)
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{
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size = is_num(size)? [size,size] : point2d(size);
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dim = array_dim(heightfield);
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assert(dim.x!=undef);
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assert(dim.y!=undef);
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assert(bottom<min(flatten(heightfield)), "bottom must be less than the minimum heightfield value.");
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spacing = vdiv(size,dim-[1,1]);
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vertices = concat(
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[
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for (i=[0:1:dim.x-1], j=[0:1:dim.y-1]) let(
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pos = [i*spacing.x-size.x/2, j*spacing.y-size.y/2, heightfield[i][j]]
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) pos
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], [
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for (i=[0:1:dim.x-1]) let(
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pos = [i*spacing.x-size.x/2, -size.y/2, bottom]
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) pos
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], [
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for (i=[0:1:dim.x-1]) let(
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pos = [i*spacing.x-size.x/2, size.y/2, bottom]
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) pos
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], [
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for (j=[0:1:dim.y-1]) let(
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pos = [-size.x/2, j*spacing.y-size.y/2, bottom]
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) pos
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], [
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for (j=[0:1:dim.y-1]) let(
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pos = [size.x/2, j*spacing.y-size.y/2, bottom]
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) pos
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]
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);
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faces = concat(
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[
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for (i=[0:1:dim.x-2], j=[0:1:dim.y-2]) let(
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idx1 = (i+0)*dim.y + j+0,
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idx2 = (i+0)*dim.y + j+1,
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idx3 = (i+1)*dim.y + j+0,
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idx4 = (i+1)*dim.y + j+1
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) each [[idx1, idx2, idx4], [idx1, idx4, idx3]]
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], [
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for (i=[0:1:dim.x-2]) let(
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idx1 = dim.x*dim.y,
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idx2 = dim.x*dim.y+dim.x+i,
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idx3 = idx2+1
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) [idx1,idx3,idx2]
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], [
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for (i=[0:1:dim.y-2]) let(
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idx1 = dim.x*dim.y,
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idx2 = dim.x*dim.y+dim.x*2+dim.y+i,
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idx3 = idx2+1
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) [idx1,idx2,idx3]
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], [
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for (i=[0:1:dim.x-2]) let(
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idx1 = (i+0)*dim.y+0,
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idx2 = (i+1)*dim.y+0,
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idx3 = dim.x*dim.y+i,
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idx4 = idx3+1
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) each [[idx1, idx2, idx4], [idx1, idx4, idx3]]
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], [
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for (i=[0:1:dim.x-2]) let(
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idx1 = (i+0)*dim.y+dim.y-1,
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idx2 = (i+1)*dim.y+dim.y-1,
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idx3 = dim.x*dim.y+dim.x+i,
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idx4 = idx3+1
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) each [[idx1, idx4, idx2], [idx1, idx3, idx4]]
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], [
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for (j=[0:1:dim.y-2]) let(
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idx1 = j,
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idx2 = j+1,
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idx3 = dim.x*dim.y+dim.x*2+j,
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idx4 = idx3+1
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) each [[idx1, idx4, idx2], [idx1, idx3, idx4]]
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], [
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for (j=[0:1:dim.y-2]) let(
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idx1 = (dim.x-1)*dim.y+j,
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idx2 = idx1+1,
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idx3 = dim.x*dim.y+dim.x*2+dim.y+j,
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idx4 = idx3+1
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) each [[idx1, idx2, idx4], [idx1, idx4, idx3]]
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]
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);
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polyhedron(points=vertices, faces=faces, convexity=convexity);
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}
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// vim: noexpandtab tabstop=4 shiftwidth=4 softtabstop=4 nowrap
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