blot/examples/cpp/cpp-trig.cpp at master · bartman/blot · GitHub

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/* vim: set noet sw=8 ts=8 tw=120: */
#include<glib.h>
#include<stdio.h>
#include<locale.h>
#include<math.h>

#include<vector>
#include<array>

#include"blot.hpp"

#defineDATA_COUNT1000
static std::vector<double> data_xs(DATA_COUNT);
static std::vector<double> sin_ys(DATA_COUNT);
static std::vector<double> cos_ys(DATA_COUNT);
static std::vector<double> tan_ys(DATA_COUNT);

#defineX_MIN -7
#defineX_MAX7
#defineY_MIN -2
#defineY_MAX2

blot_color data_color = 9;

intmain(void)
{
setlocale(LC_CTYPE, "");

/* build a dummy dataset */

for (int i=0; i<DATA_COUNT; i++) {
double x, y;

/* number between -1 and 1 */
 x = (double)(i-(DATA_COUNT/2)) / (DATA_COUNT/2);

/* number between -2π and 2π */
 x = x * 2 * M_PI;
 data_xs[i] = x;

 y = sin(x);
 sin_ys[i] = y;

 y = cos(x);
 cos_ys[i] = y;

 y = tan(x);
 tan_ys[i] = y;

	}

/* configure the figure */

	Blot::Figure fig;

	fig.set_axis_color(8);

	fig.set_screen_size(80, 40);

	fig.set_x_limits(X_MIN, X_MAX);
	fig.set_y_limits(Y_MIN, Y_MAX);

#if1
/* hack for now to add origin lines */

/* plot X-axis origin */

	std::array<std::vector<gint32>,5> xax;
	std::array<std::vector<gint32>,5> xay;

for (int i=Y_MIN; i<=Y_MAX; i++) {
 xax[Y_MAX+i] = { X_MIN, X_MAX };
 xay[Y_MAX+i] = { i, i };

 fig.line(xax[Y_MAX+i], xay[Y_MAX+i], i==0 ? 15 : 8, NULL);
	}

/* plot Y-axis origin */

	std::array<std::vector<gint32>,15> yax;
	std::array<std::vector<gint32>,15> yay;

for (int i=X_MIN; i<=X_MAX; i++) {
 yax[X_MAX+i] = { i, i };
 yay[X_MAX+i] = { Y_MIN, Y_MAX };

 fig.line(yax[X_MAX+i], yay[X_MAX+i], i==0 ? 15 : 8, NULL);
	}
/* plot Y-axis origin */

	std::array<std::vector<double>,15> ypx;
	std::array<std::vector<gint32>,15> ypy;

for (int i=Y_MIN; i<=Y_MAX; i++) {
 ypx[Y_MAX+i] = { i * M_PI, i * M_PI };
 ypy[Y_MAX+i] = { Y_MIN, Y_MAX };

 fig.line(ypx[Y_MAX+i], ypy[Y_MAX+i], 15, NULL);
	}
#endif

/* add a scatter plot */

	fig.scatter(data_xs, sin_ys, data_color, "sin");

/* add a scatter plot */

#if1
	fig.scatter(data_xs, cos_ys, data_color+1, "cos");
#endif

/* add a scatter plot */

#if1
	fig.scatter(data_xs, tan_ys, data_color+2, "tan");
#endif

/* render the plots */

	blot_render_flags flags
 = BLOT_RENDER_BRAILLE
 | BLOT_RENDER_LEGEND_ABOVE;

	Blot::Screen scr = fig.render(flags);

/* print it to screen */

	gsize txt_size = 0;
constwchar_t *txt = scr.get_text(txt_size);

printf("%ls\n", txt);

return0;
}