/**
* Display the given vector on screen
* @param v specific vector to display on overlay
* @param step step of the display
* @param height maximal height
* @param width maximal width
* @param color color used to display
*/
void displayASpecificHistogram(const HistogramVector& v,const HistogramVector& selection_v, const double step, const double height, const double width, const HistogramColor color,float selectionMultiplier)
{
if(v.size())
{
//maximum data in the current channel vector
const Number max_value = *(std::max_element(v.begin(),v.end()));
const float ratio = height/max_value;
//OpenGL 2.X
glEnable(GL_BLEND);
glBlendFunc(GL_ONE, GL_ONE); //additive blending active
glColor3f(color._colorFill.r, color._colorFill.g, color._colorFill.b);
//Display option
glBegin( GL_QUAD_STRIP );
double base_step = 0.0;//first point
for(unsigned int i=0; i<v.size(); ++i)
{
const float value = (float)(v.at(i)*ratio);
float selection_value = (float)(selection_v.at(i)*ratio);
selection_value*= selectionMultiplier;
if(selection_value > value) //if selection value is bigger than normal value replace it
selection_value = value;
glVertex2f((float)(base_step), (float)(value));
glVertex2f((float)(base_step), (float)(selection_value));
base_step += step;
}
glVertex2f((float)width,0.0f);//last point
glEnd();
glDisable(GL_BLEND);
}
}
/**
* Display the given vector on screen (only border)
* @param v specific vector to display on overlay
* @param step step of the display
* @param height maximal height
* @param width maximal width
* @param color color used to display
*/
void displayASpecificHistogramBorder(const HistogramVector& v, const double step, const double height, const double width, const HistogramColor color)
{
//Draw the border line
glBegin( GL_LINE_STRIP );
//maximum data in the current channel vector
const Number max_value = *(std::max_element(v.begin(),v.end()));
const float ratio = height/max_value;
double base_step = 0.0;
glColor3f(color._colorBorder.r, color._colorBorder.g, color._colorBorder.b);
for(unsigned int i=0; i<v.size(); ++i)
{
const float value = (float)(v.at(i)*ratio);
glVertex2f((float)(base_step), float(value));
base_step += step;
}
glEnd();
}
