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Clifford Wolf: 

Added spring() to example20
	Improved generated linear_extrude + twist 3d grid



git-svn-id: http://svn.clifford.at/openscad/trunk@336 b57f626f-c46c-0410-a088-ec61d464b74c
stl_dim
clifford 2010-01-22 14:28:17 +00:00
parent e0ca60eef7
commit 5d39aa71dd
3 changed files with 87 additions and 19 deletions
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68
dxflinextrude.cc
View File

@ -144,26 +144,56 @@ static void add_slice(PolySet *ps, DxfData::Path *pt, double rot1, double rot2,
double kx2 = pt->points[k]->x * cos(rot2*M_PI/180) + pt->points[k]->y * sin(rot2*M_PI/180);
double ky2 = pt->points[k]->x * -sin(rot2*M_PI/180) + pt->points[k]->y * cos(rot2*M_PI/180);
ps->append_poly();
if (pt->is_inner) {
ps->append_vertex(kx1, ky1, h1);
ps->append_vertex(jx1, jy1, h1);
ps->append_vertex(jx2, jy2, h2);
} else {
ps->insert_vertex(kx1, ky1, h1);
ps->insert_vertex(jx1, jy1, h1);
ps->insert_vertex(jx2, jy2, h2);
}
double dia1_len_sq = (jy1-ky2)*(jy1-ky2) + (jx1-kx2)*(jx1-kx2);
double dia2_len_sq = (jy2-ky1)*(jy2-ky1) + (jx2-kx1)*(jx2-kx1);
ps->append_poly();
if (pt->is_inner) {
ps->append_vertex(kx2, ky2, h2);
ps->append_vertex(kx1, ky1, h1);
ps->append_vertex(jx2, jy2, h2);
} else {
ps->insert_vertex(kx2, ky2, h2);
ps->insert_vertex(kx1, ky1, h1);
ps->insert_vertex(jx2, jy2, h2);
if (dia1_len_sq > dia2_len_sq)
{
ps->append_poly();
if (pt->is_inner) {
ps->append_vertex(kx1, ky1, h1);
ps->append_vertex(jx1, jy1, h1);
ps->append_vertex(jx2, jy2, h2);
} else {
ps->insert_vertex(kx1, ky1, h1);
ps->insert_vertex(jx1, jy1, h1);
ps->insert_vertex(jx2, jy2, h2);
}
ps->append_poly();
if (pt->is_inner) {
ps->append_vertex(kx2, ky2, h2);
ps->append_vertex(kx1, ky1, h1);
ps->append_vertex(jx2, jy2, h2);
} else {
ps->insert_vertex(kx2, ky2, h2);
ps->insert_vertex(kx1, ky1, h1);
ps->insert_vertex(jx2, jy2, h2);
}
}
else
{
ps->append_poly();
if (pt->is_inner) {
ps->append_vertex(kx1, ky1, h1);
ps->append_vertex(jx1, jy1, h1);
ps->append_vertex(kx2, ky2, h2);
} else {
ps->insert_vertex(kx1, ky1, h1);
ps->insert_vertex(jx1, jy1, h1);
ps->insert_vertex(kx2, ky2, h2);
}
ps->append_poly();
if (pt->is_inner) {
ps->append_vertex(jx2, jy2, h2);
ps->append_vertex(kx2, ky2, h2);
ps->append_vertex(jx1, jy1, h1);
} else {
ps->insert_vertex(jx2, jy2, h2);
ps->insert_vertex(kx2, ky2, h2);
ps->insert_vertex(jx1, jy1, h1);
}
}
}
}

1
dxftess-glu.cc
View File

@ -95,6 +95,7 @@ static void STDCALL tess_end(void)
static void STDCALL tess_error(GLenum errno)
{
fprintf(stderr, "GLU tesselation error %s", gluErrorString(errno));
PRINTF("GLU tesselation error %s", gluErrorString(errno));
}

37
examples/example020.scad
View File

@ -32,8 +32,45 @@ module nut(type = 2, r1 = 16, r2 = 21, r3 = 30, s = 6, n = 7, h = 100/5, t = 8/5
}
}
module spring(r1 = 100, r2 = 10, h = 100, hr = 12)
{
stepsize = 1/16;
module segment(i1, i2) {
alpha1 = i1 * 360*r2/hr;
alpha2 = i2 * 360*r2/hr;
len1 = sin(acos(i1*2-1))*r2;
len2 = sin(acos(i2*2-1))*r2;
if (len1 < 0.01)
polygon([
[ cos(alpha1)*r1, sin(alpha1)*r1 ],
[ cos(alpha2)*(r1-len2), sin(alpha2)*(r1-len2) ],
[ cos(alpha2)*(r1+len2), sin(alpha2)*(r1+len2) ]
]);
if (len2 < 0.01)
polygon([
[ cos(alpha1)*(r1+len1), sin(alpha1)*(r1+len1) ],
[ cos(alpha1)*(r1-len1), sin(alpha1)*(r1-len1) ],
[ cos(alpha2)*r1, sin(alpha2)*r1 ],
]);
if (len1 >= 0.01 && len2 >= 0.01)
polygon([
[ cos(alpha1)*(r1+len1), sin(alpha1)*(r1+len1) ],
[ cos(alpha1)*(r1-len1), sin(alpha1)*(r1-len1) ],
[ cos(alpha2)*(r1-len2), sin(alpha2)*(r1-len2) ],
[ cos(alpha2)*(r1+len2), sin(alpha2)*(r1+len2) ]
]);
}
linear_extrude(height = 100, twist = 180*h/hr,
$fn = (hr/r2)/stepsize, convexity = 5) {
for (i = [ stepsize : stepsize : 1+stepsize/2 ])
segment(i-stepsize, min(i, 1));
}
}
translate([ -30, 0, 0 ])
screw();
translate([ 30, 0, 0 ])
nut();
spring();