Hello everyone :)
I am trying too create an arrow. I could not create it with sf::ConvexShape because it is not a convex shape. So I decided to split it up in a head part and a end part.
For the head part I chose sf::ConvexShape and for the end part sf:RectangleShape.
I tried to put them together and rotated them but I didn't get the right solution.
Here is the code:
void Interaction::createArrow(Object *from_object, Object *to_object)
{
float x_from = from_object->getX();
float y_from = from_object->getY();
float x_to = to_object->getX();
float y_to = to_object->getY();
float x_dif = x_to - x_from;
float y_dif = y_to - y_from;
float length = sqrt(x_dif * x_dif + y_dif * y_dif);
float angle = atan2(y_dif,x_dif) * 180 / PI;
shape_end = sf::RectangleShape(sf::Vector2f(length-10,4));
sf::Rect<float> rect = shape_end.getLocalBounds();
shape_end.setOrigin(rect.left,rect.top);
shape_head.setPointCount(7);
shape_head.setOrigin(0,0);
shape_head.setPoint(0,sf::Vector2f(10,10));
shape_head.setPoint(1,sf::Vector2f(17,25));
shape_head.setPoint(2,sf::Vector2f(12,15));
shape_head.setPoint(3,sf::Vector2f(12,30));
shape_head.setPoint(4,sf::Vector2f(8,30));
shape_head.setPoint(5,sf::Vector2f(8,15));
shape_head.setPoint(6,sf::Vector2f(3,25));
shape_head.rotate(90);
float x_origin = -(shape_head.getLocalBounds().left + shape_head.getLocalBounds().width+x_dif);
float y_origin = -(shape_head.getLocalBounds().top + shape_head.getLocalBounds().height/2+y_dif);
shape_head.setOrigin(x_origin,y_origin);
shape_head.rotate(angle);
shape_end.rotate(angle);
shape_head.setOrigin(7,10);
shape_end.setPosition(x_from,y_from);
shape_head.setPosition(x_to,y_to);
}
I try to rotate the arrow so that it is pointing from the (x_from|y_from) to the (x_to|y_to) point. But the arrow head is always a little bit deferred.
What did I miss?
Thank you for your help :D