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generate non-overlapping groups

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This commit is contained in:
Trammell Hudson 2014-12-31 13:07:01 +01:00
parent 696ec71a63
commit b48577c66c
1 changed files with 28 additions and 1 deletions
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29
unfold.c
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@ -174,6 +174,7 @@ enqueue(
static poly_t * poly_root; static poly_t * poly_root;
static float poly_min[2], poly_max[2];
static inline int static inline int
v2_eq( v2_eq(
@ -342,6 +343,20 @@ poly_build(
const int start_edge = g->start_edge; const int start_edge = g->start_edge;
f->used = 1; f->used = 1;
// update the group's bounding box
for (int i = 0 ; i < 3 ; i++)
{
const float px = g->p[i][0];
const float py = g->p[i][1];
if (px < poly_min[0]) poly_min[0] = px;
if (px > poly_max[0]) poly_max[0] = px;
if (py < poly_min[1]) poly_min[1] = py;
if (py > poly_max[1]) poly_max[1] = py;
}
fprintf(stderr, "%p: adding to poly\n", f); fprintf(stderr, "%p: adding to poly\n", f);
for(int pass = 0 ; pass < 2 ; pass++) for(int pass = 0 ; pass < 2 ; pass++)
@ -611,6 +626,9 @@ int main(void)
printf("<svg xmlns=\"http://www.w3.org/2000/svg\">\n"); printf("<svg xmlns=\"http://www.w3.org/2000/svg\">\n");
poly_t origin = { }; poly_t origin = { };
float last_x = 0;
float last_y = 0;
for (int i = 0 ; i < num_triangles ; i++) for (int i = 0 ; i < num_triangles ; i++)
{ {
face_t * const f = &faces[i]; face_t * const f = &faces[i];
@ -624,6 +642,9 @@ int main(void)
// set the root of the new group // set the root of the new group
poly_root = &g; poly_root = &g;
poly_min[0] = poly_min[1] = 0;
poly_max[0] = poly_max[1] = 0;
fprintf(stderr, "\n\n\n****** New group %p\n", poly_root); fprintf(stderr, "\n\n\n****** New group %p\n", poly_root);
poly_t * iter = &g; poly_t * iter = &g;
@ -633,7 +654,13 @@ int main(void)
iter = iter->work_next; iter = iter->work_next;
} }
printf("<g>\n"); // offset the poly so that it doesn't overlap the ones
// we've already generated. only shift in Y.
float off_x = last_x - poly_min[0];
float off_y = last_y - poly_min[1];
last_y = off_y + poly_max[1];
printf("<g transform=\"translate(%f %f)\">\n", off_x, off_y);
poly_print(&g); poly_print(&g);
printf("</g>\n"); printf("</g>\n");
} }