1.1 --- a/src/main.cc	Sun Aug 17 02:25:01 2014 +0300
     1.2 +++ b/src/main.cc	Mon Aug 18 10:44:11 2014 +0300
     1.3 @@ -468,6 +468,23 @@
     1.4  		high = thres;
     1.5  	}
     1.6  
     1.7 +
     1.8 +	//drawing the histogram
     1.9 +	float hmax = 1 / (float)vol->max_histogram_value;
    1.10 +
    1.11 +	glBegin(GL_QUADS);
    1.12 +	for (int i=0; i<HIST_SIZE; i++) {
    1.13 +		float x0 = (float)i / HIST_SIZE;
    1.14 +		float x1 = (float)(i + 1) / HIST_SIZE;
    1.15 +
    1.16 +		glColor3f(0.3, 0.3, 0.3);
    1.17 +		glVertex3f(x0, 0, 0);
    1.18 +		glVertex3f(x1, 0, 0);
    1.19 +		glVertex3f(x1, hmax * vol->histogram[i + 1], 0);
    1.20 +		glVertex3f(x0, hmax * vol->histogram[i], 0);
    1.21 +	}
    1.22 +	glEnd();
    1.23 +
    1.24  	//drawing the transfer function curve
    1.25  
    1.26  	glLineWidth(3);