Sign in to follow this  
juanpablo56

deleting primitive

Recommended Posts

juanpablo56    100
Hi,

Lets say i created two points on 2d world:

glBegin(GL_POINTS);
glVertex3f(20, 20, 0);
glEnd();

glBegin(GL_POINTS);
glVertex3f(50, 50, 0);
glEnd();

How can i erase only one of them while keeping other one?

Share this post


Link to post
Share on other sites
Concentrate    181
You can either capture them using classes or variables. For example :

struct Point2D{
float _x,_y;
Point(float x = 0.0f, float y = 0.0f) : _x(x), _y(y) {}
};
bool operator == (const Point2D& p1, const Point2D& p2){
return p1.x == p2.x && p2.y == p1.y;
}

std::vector<Point2D> points;
points.push_back( Point2D(20,20));
points.push_back( Point2D(50,50));

void drawPoint(const Point2D& p){
glBegin(GL_POINTS);
glVertex3f(p.x, p.y,0.0f);
glEnd();
}

void draw(){
std::for_each(points.begin(),points.end(),drawPoint);
}

//somewhere in your program
points.remove( std::find(points.begin(), points.end(), Point2D(20,20) );


It just gives you and idea.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

Sign in to follow this