void sf::ApplyGradient(sf::Shape& shape, Orientation::Type orientation, const sf::Color& color1, const sf::Color& color2, bool applyOnBorder)
{
if(orientation != sf::Orientation::NONE)
{
sf::FloatRect shapeRect(shape.GetPointPosition(0), sf::Vector2f(0.f,0.f));
sf::Vector2f rectRightBottomCorner(0.f,0.f);
// Define left and top limits
for(unsigned int i = 0; i < shape.GetPointsCount(); ++i)
{
sf::Vector2f pointPosition = shape.GetPointPosition(i);
shapeRect.Left = (pointPosition.x < shapeRect.Left) ? pointPosition.x : shapeRect.Left;
shapeRect.Top = (pointPosition.y < shapeRect.Top) ? pointPosition.y : shapeRect.Top;
rectRightBottomCorner.x = (pointPosition.x > rectRightBottomCorner.x) ? pointPosition.x : rectRightBottomCorner.x;
rectRightBottomCorner.y = (pointPosition.y > rectRightBottomCorner.y) ? pointPosition.y : rectRightBottomCorner.y;
}
shapeRect.Width = rectRightBottomCorner.x-shapeRect.Left;
shapeRect.Height = rectRightBottomCorner.y-shapeRect.Top;
// Apply gradient
for(unsigned int i = 0; i < shape.GetPointsCount(); ++i)
{
float factor = 0.f;
sf::Vector2f pointPosition = shape.GetPointPosition(i);
switch(orientation)
{
case Orientation::TOPTOBOTTOM :
factor = 1-(pointPosition.y-shapeRect.Top)/shapeRect.Height;
break;
case Orientation::BOTTOMTOTOP :
factor = (pointPosition.y-shapeRect.Top)/shapeRect.Height;
break;
case Orientation::LEFTTORIGHT :
factor = 1-(pointPosition.x-shapeRect.Left)/shapeRect.Width;
break;
case Orientation::RIGHTTOLEFT :
factor = (pointPosition.x-shapeRect.Left)/shapeRect.Width;
break;
default :
factor = 1;
break;
}
if(applyOnBorder)
shape.SetPointOutlineColor(i, sf::Color(factor*color1.r+(1-factor)*color2.r, factor*color1.g+(1-factor)*color2.g, factor*color1.b+(1-factor)*color2.b, factor*color1.a+(1-factor)*color2.a));
else
shape.SetPointColor(i, sf::Color(factor*color1.r+(1-factor)*color2.r, factor*color1.g+(1-factor)*color2.g, factor*color1.b+(1-factor)*color2.b, factor*color1.a+(1-factor)*color2.a));
}
}
}
