fabs
/
rotate-me-fast
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Remove deprecated functions (draw).

master
Fabien Freling 2014-07-03 23:48:11 +02:00
parent e86dbe0f36
commit 4f124a2896
1 changed files with 7 additions and 95 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

102
rotation.cpp
View File

@ -421,12 +421,6 @@ double compute_ratio(Image const& img)
return 1.0f / trigo_length;
}
inline
bool fequal(float a, float b, float sigma)
{
return abs(a - b) < sigma;
}
void compute_output_size(Image const& src, double const rotation, unsigned int& width, unsigned int& height)
{
double const ratio = compute_ratio(src);
@ -473,95 +467,6 @@ void compute_output_size(Image const& src, double const rotation, unsigned int&
//
//
// Point rotation
//
Point rotate(Image const& src, Point const& p, double const ratio, double const rotation, Image const& rotated)
{
double angle = convert_radian(src, p, ratio);
DPoint a_point = convert_abs_coord(angle + rotation, ratio);
return convert_img_coord(rotated, a_point);
}
//
//
// Drawing
//
void draw_line(Image& img, unsigned int x1, unsigned int y1, unsigned int x2, unsigned int y2)
{
int x_inc = x1 <= x2 ? 1 : -1;
unsigned int const y_min = min(y1, y2);
unsigned int const y_max = max(y1, y2);
double slope = (double) y2 - y1;
if (x1 != x2)
slope = ((double) y2 - y1) / abs((double) x2 - x1);
int y_inc = slope > 0 ? 1 : -1;
if (x1 == x2)
{
for (unsigned int runner = y1; runner != y2; runner+= y_inc)
img.set_pixel(x1, runner, 255, 0, 0); // set line to red
return;
}
if (y1 == y2)
{
for (unsigned int runner = x1; runner != x2; runner+= x_inc)
img.set_pixel(runner, y1, 255, 0, 0); // set line to red
return;
}
unsigned int previous_y = y1;
for (unsigned int i = x1, steps = 0; i != x2; i += x_inc, ++steps)
{
unsigned int y = slope * steps + y1;
y = min(y, y_max);
y = max(y, y_min);
for (unsigned int runner = previous_y; runner != y; runner+= y_inc)
img.set_pixel(i, runner, 255, 0, 0); // set line to red
previous_y = y;
}
}
void draw_line(Image& img, Point const& p1, Point const& p2)
{
draw_line(img, p1.x, p1.y, p2.x, p2.y);
}
void draw_outline(Image const& input, unsigned int degrees, string const& name)
{
double const rotation = (degrees / 180.0f) * M_PI;
unsigned int w = 0;
unsigned int h = 0;
compute_output_size(input, rotation, w, h);
cout << "rotation(" << degrees << ") -> " << w << " x " << h << endl;
Image rotated(w, h);
double const ratio = compute_ratio(input);
Point tl = rotate(input, Point(0, 0), ratio, rotation, rotated);
Point tr = rotate(input, Point(input.width - 1, 0), ratio, rotation, rotated);
Point bl = rotate(input, Point(0, input.height - 1), ratio, rotation, rotated);
Point br = rotate(input, Point(input.width - 1, input.height - 1), ratio, rotation, rotated);
cout << tl << " " << tr << " " << bl << " " << br << endl;
draw_line(rotated, tl, tr);
draw_line(rotated, tr, br);
draw_line(rotated, br, bl);
draw_line(rotated, bl, tl);
stringstream ss;
ss << "check_lines_" << name << "_" << degrees << ".ppm";
rotated.save(ss.str());
}
//
//
// Math approximation
@ -576,6 +481,13 @@ void round_if_very_small(double& d)
d = 1.0;
}
inline
bool fequal(float a, float b, float sigma)
{
return abs(a - b) < sigma;
}
//
//