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do dashed lines

This commit is contained in:
Trammell Hudson 2015-01-03 18:49:07 +01:00
parent 0c1057df18
commit 8dad45d944
1 changed files with 35 additions and 13 deletions
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48
unfold.c
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@ -97,17 +97,39 @@ edge_eq2(
void
svg_line(
const char * color,
float * p1,
float * p2
const float * p1,
const float * p2,
int dash
)
{
printf("<line x1=\"%f\" y1=\"%f\" x2=\"%f\" y2=\"%f\" stroke=\"%s\" stroke-width=\"0.1px\"/>\n",
p1[0],
p1[1],
p2[0],
p2[1],
color
);
if (!dash)
{
printf("<line x1=\"%f\" y1=\"%f\" x2=\"%f\" y2=\"%f\" stroke=\"%s\" stroke-width=\"0.1px\"/>\n",
p1[0],
p1[1],
p2[0],
p2[1],
color
);
return;
}
// dashed line, split in the middle
const float dx = p2[0] - p1[0];
const float dy = p2[1] - p1[1];
const float h1[] = {
p1[0] + dx*0.45,
p1[1] + dy*0.45,
};
const float h2[] = {
p1[0] + dx*0.55,
p1[1] + dy*0.55,
};
svg_line(color, p1, h1, 0);
svg_line(color, h2, p2, 0);
}
@ -473,7 +495,7 @@ printf("<g><!-- %p %d %f %f->%p %f->%p %f->%p -->\n",
if (!next)
{
// draw a cut line
svg_line("#FF0000", g->p[i], g->p[(i+1) % 3]);
svg_line("#FF0000", g->p[i], g->p[(i+1) % 3], 0);
continue;
}
@ -483,12 +505,12 @@ printf("<g><!-- %p %d %f %f->%p %f->%p %f->%p -->\n",
if (f->coplanar[edge] < 0)
{
// draw a mountain score line since they are not coplanar
svg_line("#00FF00", g->p[i], g->p[(i+1) % 3]);
svg_line("#00FF00", g->p[i], g->p[(i+1) % 3], 1);
} else
if (f->coplanar[edge] > 0)
{
// draw a mountain score line since they are not coplanar
svg_line("#0000FF", g->p[i], g->p[(i+1) % 3]);
// draw a valley score line since they are not coplanar
svg_line("#00FF00", g->p[i], g->p[(i+1) % 3], 0);
} else {
// draw a shadow line since they are coplanar
//svg_line("#F0F0F0", g->p[i], g->p[(i+1) % 3]);