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#include "morph.h"
#include "win.h"
#include "xstring.h"
#define max_regions 5000
bool inside_2d (triangle t, point p)
{double av01v02 = angle (v01, v02);
double av10v12 = angle (v10, v12);
double s = 0.5;
return p == t.p0 || p == t.p1 || p == t.p2 || angle_ok;
. angle_ok
(angle (v0p, v01) <= av01v02 + s &&
angle (v0p, v02) <= av01v02 + s &&
angle (v1p, v10) <= av10v12 + s &&
angle (v1p, v12) <= av10v12 + s).
. v01 new_vector (t.p0, t.p1).
. v02 new_vector (t.p0, t.p2).
. v12 new_vector (t.p1, t.p2).
. v10 new_vector (t.p1, t.p0).
. v0p new_vector (t.p0, p).
. v1p new_vector (t.p1, p).
}
void morph (ppm *pa,
ppm *pb,
ppm *pc,
triangle ta,
triangle tb,
double s)
{triangle mreg;
calc_mreg;
fill_mreg;
. calc_mreg
{mreg = new_triangle (ta.p0 + p0_shift, ta.p1 + p1_shift, ta.p2 + p2_shift);
}.
. p0_shift set_length (ta0tb0, length (ta0tb0) * s).
. p1_shift set_length (ta1tb1, length (ta1tb1) * s).
. p2_shift set_length (ta2tb2, length (ta2tb2) * s).
. ta0tb0 new_vector (ta.p0, tb.p0).
. ta1tb1 new_vector (ta.p1, tb.p1).
. ta2tb2 new_vector (ta.p2, tb.p2).
. fill_mreg
{point pmin;
point pmax;
hull (mreg, pmin, pmax);
for (int x = (int) pmin.x; x <= (int) pmax.x; x++)
for (int y = (int) pmin.y; y <= (int) pmax.y; y++)
if (inside_2d (mreg, new_point (x, y, 0)))
morph_pixel;
}.
. morph_pixel
{double a;
double b;
int pixel_r [2];
int pixel_g [2];
int pixel_b [2];
get_morph_gen;
get_orig_rgb;
get_dest_rgb;
gen_morph_pixel;
}.
. get_morph_gen
{get_gen (new_point (x, y, 0), mreg.p0, mreg.p1, mreg.p2, a, b);
}.
. get_orig_rgb
{point p;
point pmin;
point pmax;
hull (ta, pmin, pmax);
p = ta.p0 + (new_vector (ta.p0, ta.p1) * a) + (new_vector (ta.p0, ta.p2) * b);
p = p_min (pmax, p_max (p, pmin));
pa->rgb ((int) p.x, (int) p.y, pixel_r [0], pixel_g [0], pixel_b [0]);
}.
. get_dest_rgb
{point p;
point pmin;
point pmax;
hull (tb, pmin, pmax);
p = tb.p0 + (new_vector (tb.p0, tb.p1) * a) + (new_vector (tb.p0, tb.p2) * b);
p = p_min (pmax, p_max (p, pmin));
pb->rgb ((int) p.x, (int) p.y, pixel_r [1], pixel_g [1], pixel_b [1]);
}.
. gen_morph_pixel
{pc->set (x, y, rm, gm, bm);
}.
. rm (int) (((1.0 - s) * (double) pixel_r [0] + s * (double) pixel_r [1])).
. gm (int) (((1.0 - s) * (double) pixel_g [0] + s * (double) pixel_g [1])).
. bm (int) (((1.0 - s) * (double) pixel_b [0] + s * (double) pixel_b [1])).
}
void morph (char orig [],
char dest [],
char background [],
char regions [],
int number_of_steps)
{ppm *pa;
ppm *pb;
ppm *pc;
ppm *back;
triangle region [max_regions][2];
int num_regions;
start_message;
open_ppms;
load_regions;
perform_morph;
delete_ppms;
finish_message;
. start_message
{printf ("morphing (%s, %s) -> %s\n", orig, background, dest);
}.
. finish_message
{printf ("finsihed\n");
}.
. open_ppms
{pa = new ppm (orig);
pb = new ppm (dest);
back = new ppm (background);
pc = new ppm (background);
}.
. delete_ppms
{delete (pa);
delete (pb);
delete (back);
delete (pc);
}.
. load_regions
{FILE *t_data;
bool another_region;
open_t_data;
num_regions = 0;
scan_region;
while (another_region)
{scan_region;
};
fclose (t_data);
}.
. open_t_data
{f_open (t_data, regions, "r");
}.
. scan_region
{float p [12];
another_region = (fscanf (t_data,
"%f %f %f %f %f %f %f %f %f %f %f %f",
& p [0], & p [1],
& p [2], & p [3],
& p [4], & p [5],
& p [6], & p [7],
& p [8], & p [9],
& p [10], & p [11]) != EOF);
if (another_region)
store_region;
}.
. store_region
{region [num_regions][0] = new_triangle (new_point (p [0], p [1], 0),
new_point (p [2], p [3], 0),
new_point (p [4], p [5], 0));
region [num_regions][1] = new_triangle (new_point (p [6], p [7], 0),
new_point (p [8], p [9], 0),
new_point (p [10], p [11], 0));
num_regions++;
}.
. perform_morph
{for (int s = 0; s < number_of_steps; s++)
perform_morph_step;
}.
. perform_morph_step
{load_background;
morph_all_regions;
save_result;
}.
. load_background
{copy (pc, back);
}.
. morph_all_regions
{show_state;
for (int r = 0; r < num_regions; r++)
morph_region;
}.
. show_state
{printf ("\n %5.2f ", (double)(s+1) / (double) number_of_steps * 100.0);
fflush (stdout);
}.
. morph_region
{printf (".");
fflush (stdout);
morph (pa, pb, pc,
region [r][0],
region [r][1],
(double) s / (double) (number_of_steps-1));
}.
. save_result
{char r_name [128];
sprintf (r_name, "%s_%04d", regions, s);
changeall (r_name, 128, ".morph", "");
strcat (r_name, ".ppm");
pc->save (r_name);
convert_to_pcx;
}.
. convert_to_pcx
{char cmd [256];
char r_name [128];
sprintf (r_name, "%s_%04d", regions, s);
changeall (r_name, 128, ".morph", "");
sprintf (cmd, "ppmquant 256 %s.ppm > %s.tmp",r_name,r_name);
system (cmd);
sprintf (cmd, "ppmtopcx %s.tmp > %s.pcx", r_name, r_name);
system (cmd);
sprintf (cmd, "rm %s.ppm %s.tmp",r_name, r_name);
system (cmd);
}.
}
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