mirror of
https://github.com/RetroDECK/ES-DE.git
synced 2024-12-12 15:35:39 +00:00
357 lines
13 KiB
C++
357 lines
13 KiB
C++
/*
|
|
#
|
|
# File : curve_editor2d.cpp
|
|
# ( C++ source file )
|
|
#
|
|
# Description : A simple user interface to construct 2D spline curves.
|
|
# This file is a part of the CImg Library project.
|
|
# ( http://cimg.eu )
|
|
#
|
|
# Copyright : David Tschumperlé
|
|
# ( http://tschumperle.users.greyc.fr/ )
|
|
# Antonio Albiol Colomer
|
|
# ( http://personales.upv.es/~aalbiol/index-english.html )
|
|
#
|
|
# License : CeCILL v2.0
|
|
# ( http://www.cecill.info/licences/Licence_CeCILL_V2-en.html )
|
|
#
|
|
# This software is governed by the CeCILL license under French law and
|
|
# abiding by the rules of distribution of free software. You can use,
|
|
# modify and/ or redistribute the software under the terms of the CeCILL
|
|
# license as circulated by CEA, CNRS and INRIA at the following URL
|
|
# "http://www.cecill.info".
|
|
#
|
|
# As a counterpart to the access to the source code and rights to copy,
|
|
# modify and redistribute granted by the license, users are provided only
|
|
# with a limited warranty and the software's author, the holder of the
|
|
# economic rights, and the successive licensors have only limited
|
|
# liability.
|
|
#
|
|
# In this respect, the user's attention is drawn to the risks associated
|
|
# with loading, using, modifying and/or developing or reproducing the
|
|
# software by the user in light of its specific status of free software,
|
|
# that may mean that it is complicated to manipulate, and that also
|
|
# therefore means that it is reserved for developers and experienced
|
|
# professionals having in-depth computer knowledge. Users are therefore
|
|
# encouraged to load and test the software's suitability as regards their
|
|
# requirements in conditions enabling the security of their systems and/or
|
|
# data to be ensured and, more generally, to use and operate it in the
|
|
# same conditions as regards security.
|
|
#
|
|
# The fact that you are presently reading this means that you have had
|
|
# knowledge of the CeCILL license and that you accept its terms.
|
|
#
|
|
*/
|
|
|
|
#include "CImg.h"
|
|
using namespace cimg_library;
|
|
#undef min
|
|
#undef max
|
|
|
|
// Compute distance from a point to a segment.
|
|
//---------------------------------------------
|
|
float dist_segment(const float x, const float y, const float x1, const float y1, const float x2, const float y2) {
|
|
const float
|
|
dx = x2 - x1,
|
|
dy = y2 - y1,
|
|
long_segment = (float)std::sqrt(dx*dx + dy*dy);
|
|
if (long_segment==0) { const float ddx = x - x1, ddy = y - y1; return (float)std::sqrt(ddx*ddx + ddy*ddy); }
|
|
const float
|
|
unitx = dx/long_segment,
|
|
unity = dy/long_segment,
|
|
vx = x - x1,
|
|
vy = y - y1,
|
|
long_proy = vx*unitx + vy*unity,
|
|
proyx = x1 + long_proy*unitx,
|
|
proyy = y1 + long_proy*unity;
|
|
if (long_proy>long_segment) { const float ddx = x - x2, ddy = y - y2; return std::sqrt(ddx*ddx + ddy*ddy); }
|
|
else if (long_proy<0) { const float ddx = x - x1, ddy = y - y1; return std::sqrt(ddx*ddx + ddy*ddy); }
|
|
const float ddx = x - proyx, ddy = y - proyy;
|
|
return std::sqrt(ddx*ddx + ddy*ddy);
|
|
}
|
|
|
|
// Main procedure
|
|
//---------------
|
|
int main(int argc, char **argv) {
|
|
|
|
// Read command line parameters
|
|
//-----------------------------
|
|
cimg_usage("2D Spline Curve Editor");
|
|
const char *file_i = cimg_option("-i",(char*)0,"Input image");
|
|
const float contrast = cimg_option("-contrast",0.6f,"Image contrast");
|
|
const char *file_ip = cimg_option("-ip",(char*)0,"Input control points");
|
|
const char *file_oc = cimg_option("-oc",(char*)0,"Output curve points");
|
|
const char *file_op = cimg_option("-op",(char*)0,"Output control points");
|
|
const char *file_od = cimg_option("-od",(char*)0,"Output distance function");
|
|
bool interp = cimg_option("-poly",true,"Use polynomial interpolation");
|
|
bool closed = cimg_option("-closed",true,"Closed curve");
|
|
bool show_tangents = cimg_option("-tangents",false,"Show tangents");
|
|
bool show_points = cimg_option("-points",true,"Show control points");
|
|
bool show_outline = cimg_option("-outline",true,"Show polygon outline");
|
|
bool show_indices = cimg_option("-indices",true,"Show points indices");
|
|
bool show_coordinates = cimg_option("-coords",false,"Show points coordinates");
|
|
const float precision = cimg_option("-prec",0.05f,"Precision of curve discretization");
|
|
|
|
// Init image data
|
|
//-----------------
|
|
const unsigned char yellow[] = { 255,255,0 }, white[] = { 255,255,255 }, green[] = { 0,255,0 },
|
|
blue[] = { 120,200,255 }, purple[] = { 255,100,255 }, black[] = { 0,0,0 };
|
|
CImg<unsigned char> img0, img, help_img;
|
|
if (file_i) {
|
|
std::fprintf(stderr,"\n - Load input image '%s' : ",cimg::basename(file_i));
|
|
img0 = CImg<>(file_i).normalize(0,255.0f*contrast);
|
|
std::fprintf(stderr,"Size = %dx%dx%dx%d \n",img0.width(),img0.height(),img0.depth(),img0.spectrum());
|
|
img0.resize(-100,-100,1,3);
|
|
}
|
|
else {
|
|
std::fprintf(stderr,"\n - No input image specified, use default 512x512 image.\n");
|
|
img0.assign(512,512,1,3,0).draw_grid(32,32,0,0,false,false,green,0.4f,0xCCCCCCCC,0xCCCCCCCC);
|
|
}
|
|
|
|
help_img.assign(220,210,1,3,0).
|
|
draw_text(5,5,
|
|
"------------------------------------------\n"
|
|
"2D Curve Editor\n"
|
|
"------------------------------------------\n"
|
|
"Left button : Create or move control point\n"
|
|
"Right button : Delete control point\n"
|
|
"Spacebar : Switch interpolation\n"
|
|
"Key 'C' : Switch open/closed mode\n"
|
|
"Key 'T' : Show/hide tangents\n"
|
|
"Key 'P' : Show/hide control points\n"
|
|
"Key 'O' : Show/hide polygon outline\n"
|
|
"Key 'N' : Show/hide points indices\n"
|
|
"Key 'X' : Show/hide points coordinates\n"
|
|
"Key 'H' : Show/hide this help\n"
|
|
"Key 'S' : Save control points\n"
|
|
"Key 'R' : Reset curve\n",
|
|
green);
|
|
CImgDisplay disp(img0,"2D Curve Editor",0);
|
|
CImgList<float> points, curve;
|
|
bool moving = false, help = !file_i;
|
|
|
|
if (file_ip) {
|
|
std::fprintf(stderr," - Load input control points '%s' : ",cimg::basename(file_ip));
|
|
points = CImg<>(file_ip).transpose()<'x';
|
|
std::fprintf(stderr," %u points\n",points.size());
|
|
}
|
|
|
|
// Enter interactive loop
|
|
//------------------------
|
|
while (!disp.is_closed() && !disp.is_keyESC() && !disp.is_keyQ()) {
|
|
|
|
// Handle mouse manipulation
|
|
//---------------------------
|
|
const unsigned int button = disp.button();
|
|
const float
|
|
mx = disp.mouse_x()*(float)img0.width()/disp.width(),
|
|
my = disp.mouse_y()*(float)img0.height()/disp.height();
|
|
|
|
if (points && button && mx>=0 && my>=0) {
|
|
|
|
// Find nearest point and nearest segment
|
|
float dmin_pt = cimg::type<float>::max(), dmin_seg = dmin_pt;
|
|
unsigned int p_pt = 0, p_seg = 0;
|
|
cimglist_for(points,p) {
|
|
const unsigned int
|
|
pnext = closed?(p + 1)%points.size():(p + 1<(int)points.size()?p + 1:p);
|
|
const float
|
|
xp = points(p,0),
|
|
yp = points(p,1);
|
|
const float
|
|
d_pt = (xp - mx)*(xp - mx) + (yp - my)*(yp - my),
|
|
d_seg = dist_segment(mx,my,xp,yp,points(pnext,0),points(pnext,1));
|
|
if (d_pt<dmin_pt) { dmin_pt = d_pt; p_pt = p; }
|
|
if (d_seg<dmin_seg) { dmin_seg = d_seg; p_seg = p; }
|
|
}
|
|
|
|
// Handle button
|
|
if (button&1) {
|
|
if (dmin_pt<100 || moving) { points(p_pt,0) = mx; points(p_pt,1) = my; }
|
|
else points.insert(CImg<>::vector(mx,my),p_seg + 1);
|
|
moving = true;
|
|
}
|
|
if (button&2 && dmin_pt<100) {
|
|
if (points.size()>3) points.remove(p_pt);
|
|
disp.set_button();
|
|
}
|
|
}
|
|
if (!button) moving = false;
|
|
|
|
if (disp.key()) {
|
|
switch (disp.key()) {
|
|
case cimg::keySPACE : interp = !interp; break;
|
|
case cimg::keyC : closed = !closed; break;
|
|
case cimg::keyT : show_tangents = !show_tangents; break;
|
|
case cimg::keyP : show_points = !show_points; break;
|
|
case cimg::keyO : show_outline = !show_outline; break;
|
|
case cimg::keyN : show_indices = !show_indices; break;
|
|
case cimg::keyX : show_coordinates = !show_coordinates; break;
|
|
case cimg::keyR : points.assign(); break;
|
|
case cimg::keyH : help = !help; break;
|
|
case cimg::keyS : {
|
|
const char *filename = file_op?file_op:"curve_points.dlm";
|
|
std::fprintf(stderr," - Save control points in '%s'\n",filename);
|
|
(points>'x').transpose().save(filename);
|
|
} break;
|
|
}
|
|
disp.set_key();
|
|
}
|
|
|
|
// Init list of points if empty
|
|
//------------------------------
|
|
if (!points) {
|
|
const float
|
|
x0 = img0.width()/4.0f,
|
|
y0 = img0.height()/4.0f,
|
|
x1 = img0.width() - x0,
|
|
y1 = img0.height() - y0;
|
|
points.insert(CImg<>::vector(x0,y0)).
|
|
insert(CImg<>::vector(x1,y0)).
|
|
insert(CImg<>::vector(x1,y1)).
|
|
insert(CImg<>::vector(x0,y1));
|
|
}
|
|
|
|
// Estimate curve tangents
|
|
//-------------------------
|
|
CImg<> tangents(points.size(),2);
|
|
cimglist_for(points,p) {
|
|
const unsigned int
|
|
p0 = closed?(p + points.size() - 1)%points.size():(p?p - 1:0),
|
|
p1 = closed?(p + 1)%points.size():(p + 1<(int)points.size()?p + 1:p);
|
|
const float
|
|
x = points(p,0),
|
|
y = points(p,1),
|
|
x0 = points(p0,0),
|
|
y0 = points(p0,1),
|
|
x1 = points(p1,0),
|
|
y1 = points(p1,1),
|
|
u0 = x - x0,
|
|
v0 = y - y0,
|
|
n0 = 1e-8f + (float)std::sqrt(u0*u0 + v0*v0),
|
|
u1 = x1 - x,
|
|
v1 = y1 - y,
|
|
n1 = 1e-8f + (float)std::sqrt(u1*u1 + v1*v1),
|
|
u = u0/n0 + u1/n1,
|
|
v = v0/n0 + v1/n1,
|
|
n = 1e-8f + (float)std::sqrt(u*u + v*v),
|
|
fact = 0.5f*(n0 + n1);
|
|
tangents(p,0) = fact*u/n;
|
|
tangents(p,1) = fact*v/n;
|
|
}
|
|
|
|
// Estimate 3th-order polynomial interpolation
|
|
//---------------------------------------------
|
|
curve.assign();
|
|
const unsigned int pmax = points.size() - (closed?0:1);
|
|
for (unsigned int p0 = 0; p0<pmax; p0++) {
|
|
const unsigned int
|
|
p1 = closed?(p0 + 1)%points.size():(p0 + 1<points.size()?p0 + 1:p0);
|
|
const float
|
|
x0 = points(p0,0),
|
|
y0 = points(p0,1),
|
|
x1 = points(p1,0),
|
|
y1 = points(p1,1);
|
|
float ax = 0, bx = 0, cx = 0, dx = 0, ay = 0, by = 0, cy = 0, dy = 0;
|
|
if (interp) {
|
|
const float
|
|
u0 = tangents(p0,0),
|
|
v0 = tangents(p0,1),
|
|
u1 = tangents(p1,0),
|
|
v1 = tangents(p1,1);
|
|
ax = 2*(x0 - x1) + u0 + u1;
|
|
bx = 3*(x1 - x0) - 2*u0 - u1;
|
|
cx = u0;
|
|
dx = x0;
|
|
ay = 2*(y0 - y1) + v0 + v1;
|
|
by = 3*(y1 - y0) - 2*v0 - v1;
|
|
cy = v0;
|
|
dy = y0;
|
|
} else {
|
|
ax = ay = bx = by = 0;
|
|
dx = x0;
|
|
dy = y0;
|
|
cx = x1 - x0;
|
|
cy = y1 - y0;
|
|
}
|
|
const float tmax = 1 + precision;
|
|
for (float t = 0; t<tmax; t+=precision) {
|
|
const float
|
|
xt = ax*t*t*t + bx*t*t + cx*t + dx,
|
|
yt = ay*t*t*t + by*t*t + cy*t + dy;
|
|
curve.insert(CImg<>::vector(xt,yt));
|
|
}
|
|
}
|
|
|
|
// Draw curve and display image
|
|
//-------------------------------
|
|
const float
|
|
factx = (float)disp.width()/img0.width(),
|
|
facty = (float)disp.height()/img0.height();
|
|
img = img0.get_resize(disp.width(),disp.height());
|
|
if (help) img.draw_image(help_img,0.6f);
|
|
if (interp && show_outline) {
|
|
CImg<> npoints = points>'x';
|
|
npoints.get_shared_row(0)*=factx;
|
|
npoints.get_shared_row(1)*=facty;
|
|
img.draw_polygon(npoints,blue,0.4f);
|
|
if (closed) img.draw_polygon(npoints,yellow,0.8f,0x11111111);
|
|
else img.draw_line(npoints,yellow,0.8f,0x11111111);
|
|
}
|
|
CImg<> ncurve = curve>'x';
|
|
ncurve.get_shared_row(0)*=factx;
|
|
ncurve.get_shared_row(1)*=facty;
|
|
if (closed) img.draw_polygon(ncurve,white,1.0f,~0U);
|
|
else img.draw_line(ncurve,white);
|
|
|
|
if (show_points) cimglist_for(points,p) {
|
|
const float
|
|
x = points(p,0)*factx,
|
|
y = points(p,1)*facty;
|
|
if (show_tangents) {
|
|
const float
|
|
u = tangents(p,0),
|
|
v = tangents(p,1),
|
|
n = 1e-8f + (float)std::sqrt(u*u + v*v),
|
|
nu = u/n,
|
|
nv = v/n;
|
|
img.draw_arrow((int)(x - 15*nu),(int)(y - 15*nv),(int)(x + 15*nu),(int)(y + 15*nv),green);
|
|
}
|
|
if (show_indices) img.draw_text((int)x,(int)(y - 16),"%d",purple,black,1,13,p);
|
|
if (show_coordinates)
|
|
img.draw_text((int)(x - 24),(int)(y + 8),"(%d,%d)",yellow,black,0.5f,13,(int)points(p,0),(int)points(p,1));
|
|
img.draw_circle((int)x,(int)y,3,blue,0.7f);
|
|
}
|
|
|
|
img.display(disp);
|
|
disp.wait();
|
|
|
|
if (disp.is_resized()) disp.resize(false);
|
|
}
|
|
|
|
// Save output result and exit
|
|
//-----------------------------
|
|
if (file_op) {
|
|
std::fprintf(stderr," - Save control points in '%s'\n",cimg::basename(file_op));
|
|
(points>'x').transpose().save(file_op);
|
|
}
|
|
if (file_oc) {
|
|
std::fprintf(stderr," - Save curve points in '%s'\n",cimg::basename(file_oc));
|
|
(curve>'x').transpose().save(file_oc);
|
|
}
|
|
if (file_od) {
|
|
std::fprintf(stderr," - Computing distance function, please wait...."); std::fflush(stderr);
|
|
CImg<> ncurve = (closed?(+curve).insert(curve[0]):curve)>'x';
|
|
const float zero = 0.0f, one = 1.0f;
|
|
CImg<> distance =
|
|
CImg<>(img0.width(),img0.height(),1,1,-1.0f).draw_line(ncurve,&zero).draw_fill(0,0,&one).
|
|
distance(0);
|
|
std::fprintf(stderr,"\n - Save distance function in '%s'\n",cimg::basename(file_od));
|
|
distance.save(file_od);
|
|
}
|
|
|
|
std::fprintf(stderr," - Exit.\n");
|
|
std::exit(0);
|
|
return 0;
|
|
}
|