// TODO: Make border radius true 1-point wide, even for low poly scenarios (by adjusting the inner radius intelligently, not just -1)
void DrawCircle(Vector2n Position, Vector2n Size, Color BackgroundColor, Color BorderColor)
{
glDisable(GL_TEXTURE_2D);
const auto TwoPi = std::atan(1) * 8;
const uint32 x = 64;
glBegin(GL_TRIANGLE_FAN);
glColor3dv(BorderColor.GetComponents());
glVertex2i(Position.X(), Position.Y());
for (int i = 0; i <= x; ++i)
{
glVertex2d(Position.X() + std::sin(TwoPi * i / x) * Size.X() / 2, Position.Y() + std::cos(TwoPi * i / x) * Size.Y() / 2);
}
glEnd();
glBegin(GL_TRIANGLE_FAN);
glColor3dv(BackgroundColor.GetComponents());
glVertex2i(Position.X(), Position.Y());
for (int i = 0; i <= x; ++i)
{
glVertex2d(Position.X() + std::sin(TwoPi * i / x) * (Size.X() / 2 - 1), Position.Y() + std::cos(TwoPi * i / x) * (Size.Y() / 2 - 1));
}
glEnd();
glEnable(GL_TEXTURE_2D);
}
void DrawAroundBox(Vector2n Position, Vector2n Size, Color BackgroundColor, Color BorderColor)
{
glDisable(GL_TEXTURE_2D);
glBegin(GL_QUADS);
glColor3dv(BorderColor.GetComponents());
glVertex2i(-1 + Position.X(), -1 + Position.Y());
glVertex2i(-1 + Position.X(), +1 + Position.Y() + Size.Y());
glVertex2i(+1 + Position.X() + Size.X(), +1 + Position.Y() + Size.Y());
glVertex2i(+1 + Position.X() + Size.X(), -1 + Position.Y());
glEnd();
glBegin(GL_QUADS);
glColor3dv(BackgroundColor.GetComponents());
glVertex2i(Position.X(), Position.Y());
glVertex2i(Position.X(), Position.Y() + Size.Y());
glVertex2i(Position.X() + Size.X(), Position.Y() + Size.Y());
glVertex2i(Position.X() + Size.X(), Position.Y());
glEnd();
glEnable(GL_TEXTURE_2D);
}
void DrawInnerBox(Vector2n Position, Vector2n Size, Color BackgroundColor, Color BorderColor)
{
if ( 0 == Size.X()
|| 0 == Size.Y())
{
return;
}
glDisable(GL_TEXTURE_2D);
const auto OuterDistance = 1.5;
glBegin(GL_POLYGON);
glColor3dv(BorderColor.GetComponents());
glVertex2d(Position.X() + OuterDistance, Position.Y());
glVertex2d(Position.X(), Position.Y() + OuterDistance);
glVertex2d(Position.X(), Position.Y() - OuterDistance + Size.Y());
glVertex2d(Position.X() + OuterDistance, Position.Y() + Size.Y());
glVertex2d(Position.X() - OuterDistance + Size.X(), Position.Y() + Size.Y());
glVertex2d(Position.X() + Size.X(), Position.Y() - OuterDistance + Size.Y());
glVertex2d(Position.X() + Size.X(), Position.Y() + OuterDistance);
glVertex2d(Position.X() - OuterDistance + Size.X(), Position.Y());
glEnd();
const auto InnerDistance = sqrt(2.0) + 0.5;
glBegin(GL_POLYGON);
glColor3dv(BackgroundColor.GetComponents());
glVertex2d(Position.X() + InnerDistance, Position.Y() + 1);
glVertex2d(Position.X() + 1, Position.Y() + InnerDistance);
glVertex2d(Position.X() + 1, Position.Y() - InnerDistance + Size.Y());
glVertex2d(Position.X() + InnerDistance, Position.Y() - 1 + Size.Y());
glVertex2d(Position.X() - InnerDistance + Size.X(), Position.Y() - 1 + Size.Y());
glVertex2d(Position.X() - 1 + Size.X(), Position.Y() - InnerDistance + Size.Y());
glVertex2d(Position.X() - 1 + Size.X(), Position.Y() + InnerDistance);
glVertex2d(Position.X() - InnerDistance + Size.X(), Position.Y() + 1);
glEnd();
glEnable(GL_TEXTURE_2D);
}
void DrawBoxBorderless(Vector2n Position, Vector2n Size, Color Color)
{
glDisable(GL_TEXTURE_2D);
glBegin(GL_QUADS);
glColor3dv(Color.GetComponents());
glVertex2i(Position.X(), Position.Y());
glVertex2i(Position.X(), Position.Y() + Size.Y());
glVertex2i(Position.X() + Size.X(), Position.Y() + Size.Y());
glVertex2i(Position.X() + Size.X(), Position.Y());
glEnd();
glEnable(GL_TEXTURE_2D);
}
// TODO: Make a more direct implementation
void DrawInnerRoundedBox(Vector2n Position, Vector2n Size, uint32 Radius, Color BackgroundColor, Color BorderColor)
{
DrawCircle(Position + Vector2n(Radius, Radius), Vector2n(Radius * 2, Radius * 2), BackgroundColor, BorderColor);
if ( Size.X() < Radius * 2
|| Size.Y() < Radius * 2)
{
return;
}
DrawCircle(Position + Vector2n(Size.X(), 0) + Vector2n(-Radius, Radius), Vector2n(Radius * 2, Radius * 2), BackgroundColor, BorderColor);
DrawCircle(Position + Vector2n(0, Size.Y()) + Vector2n(Radius, -Radius), Vector2n(Radius * 2, Radius * 2), BackgroundColor, BorderColor);
DrawCircle(Position + Size - Vector2n(Radius, Radius), Vector2n(Radius * 2, Radius * 2), BackgroundColor, BorderColor);
{
Position += Vector2n(Radius, 0);
Size -= Vector2n(Radius * 2, 0);
// DUPLICATION: A tweaked copy of DrawBox()
{
glDisable(GL_TEXTURE_2D);
glBegin(GL_QUADS);
glColor3dv(BorderColor.GetComponents());
glVertex2i(Position.X(), Position.Y());
glVertex2i(Position.X(), Position.Y() + Size.Y());
glVertex2i(Position.X() + Size.X(), Position.Y() + Size.Y());
glVertex2i(Position.X() + Size.X(), Position.Y());
glEnd();
glBegin(GL_QUADS);
glColor3dv(BackgroundColor.GetComponents());
glVertex2i(Position.X(), +1 + Position.Y());
glVertex2i(Position.X(), -1 + Position.Y() + Size.Y());
glVertex2i(Position.X() + Size.X(), -1 + Position.Y() + Size.Y());
glVertex2i(Position.X() + Size.X(), +1 + Position.Y());
glEnd();
glEnable(GL_TEXTURE_2D);
}
}
{
Position += Vector2n(-Radius, Radius);
Size += Vector2n(Radius * 2, -Radius * 2);
// DUPLICATION: A tweaked copy of DrawBox()
{
glDisable(GL_TEXTURE_2D);
glBegin(GL_QUADS);
glColor3dv(BorderColor.GetComponents());
glVertex2i(Position.X(), Position.Y());
glVertex2i(Position.X(), Position.Y() + Size.Y());
glVertex2i(Position.X() + Size.X(), Position.Y() + Size.Y());
glVertex2i(Position.X() + Size.X(), Position.Y());
glEnd();
glBegin(GL_QUADS);
glColor3dv(BackgroundColor.GetComponents());
glVertex2i(+1 + Position.X(), Position.Y());
glVertex2i(+1 + Position.X(), Position.Y() + Size.Y());
glVertex2i(-1 + Position.X() + Size.X(), Position.Y() + Size.Y());
glVertex2i(-1 + Position.X() + Size.X(), Position.Y());
glEnd();
glEnable(GL_TEXTURE_2D);
}
}
}