View Full Version : creating glVertex2f for every new data value

11-29-2009, 09:10 AM
I'm working on this robot project, that outputs some continuous values while the robot is moving. Currently, my code to draw these values are such below.

//Displacement of Robot
glColor3f(1.0f, 0.0f, 0.0f);
glLineWidth (3);
glVertex2f(0, 0); // origin of the line
glVertex2f(Y_VALUE, X_VALUE); // ending point of the
glEnd( ); line

So, while the robot is moving, it is constantly giving me new y-value and x-value, and I'm trying to develop a code where the current position of the robot is displayed on the computer screen. Thus, I need to figure out some type of loop that keeps creating a new glVertex2f function for every new x-value and y-value. For example

glVertex2f(0, 0); // origin of the line
glVertex2f(Y_VALUE_1, X_VALUE_1);
glVertex2f(Y_VALUE_2, X_VALUE_2);
glVertex2f(Y_VALUE_3, X_VALUE_3);
glVertex2f(Y_VALUE_N, X_VALUE_N);
glEnd( );

If I can figure this out, then the lines will be connected from the origin till the last x and y value. I will greatly appreciate any help provided. Thanks.

11-29-2009, 10:32 AM
An array (std::vector) and simple loop inside glBegin :confused: