public void RenderBorderBack(ISquare square)
{
IGLColor color = IsSelected ? _selectedColor : _color;
IGLColor foldColor = IsSelected ? _selectedFoldColor : _foldColor;
_glUtils.DrawQuad(0, square.BottomLeft.ToVector3(), square.BottomRight.ToVector3(),
square.TopLeft.ToVector3(), square.TopRight.ToVector3(),
color, color, color, color);
float foldHeight = (square.MaxY - square.MinY) * (1f / 5f);
PointF foldBottom = new PointF((square.TopLeft.X + square.TopRight.X) / 2f, square.TopLeft.Y - foldHeight);
_glUtils.DrawTriangleFan(0, new GLVertex[] { new GLVertex(square.TopLeft.ToVector2(), _emptyVector, foldColor),
new GLVertex(foldBottom.ToVector2(), _emptyVector, foldColor), new GLVertex(square.TopRight.ToVector2(), _emptyVector, foldColor)});
}
private void drawRoundCorner(PointF center, float radius, float angle, ISquare border, FourCorners<IGLColor> colors)
{
Vector2 tex = new Vector2 ();
GLVertex centerVertex = new GLVertex (center.ToVector2(), tex, getColor(colors, border, center));
_roundCorner[0] = centerVertex;
float step = (90f / (_roundCorner.Length - 2));
for (int i = 1; i < _roundCorner.Length; i++)
{
float anglerad = (float)Math.PI * angle / 180.0f;
float x = (float)Math.Sin(anglerad) * radius;
float y = (float)Math.Cos(anglerad) * radius;
angle += step;
PointF point = new PointF (x + center.X, y + center.Y);
_roundCorner[i] = new GLVertex (point.ToVector2(), tex, getColor(colors, border, point));
}
_glUtils.DrawTriangleFan(0, _roundCorner);
}