public static void DrawMeasureLine(Graphics2D graphics2D, Vector2 lineStart, Vector2 lineEnd, RGBA_Bytes color, LineArrows arrows)
{
graphics2D.Line(lineStart, lineEnd, RGBA_Bytes.Black);
Vector2 direction = lineEnd - lineStart;
if (direction.LengthSquared > 0 &&
(arrows.HasFlag(LineArrows.Start) || arrows.HasFlag(LineArrows.End)))
{
PathStorage arrow = new PathStorage();
arrow.MoveTo(-3, -5);
arrow.LineTo(0, 0);
arrow.LineTo(3, -5);
if (arrows.HasFlag(LineArrows.End))
{
double rotation = Math.Atan2(direction.y, direction.x);
IVertexSource correctRotation = new VertexSourceApplyTransform(arrow, Affine.NewRotation(rotation - MathHelper.Tau / 4));
IVertexSource inPosition = new VertexSourceApplyTransform(correctRotation, Affine.NewTranslation(lineEnd));
graphics2D.Render(inPosition, RGBA_Bytes.Black);
}
if (arrows.HasFlag(LineArrows.Start))
{
double rotation = Math.Atan2(direction.y, direction.x) + MathHelper.Tau / 2;
IVertexSource correctRotation = new VertexSourceApplyTransform(arrow, Affine.NewRotation(rotation - MathHelper.Tau / 4));
IVertexSource inPosition = new VertexSourceApplyTransform(correctRotation, Affine.NewTranslation(lineStart));
graphics2D.Render(inPosition, RGBA_Bytes.Black);
}
}
}
public static void DrawMeasureLine(this Graphics2D graphics2D, Vector2 lineStart, Vector2 lineEnd, LineArrows arrows, ThemeConfig theme)
{
graphics2D.Line(lineStart, lineEnd, theme.TextColor);
Vector2 direction = lineEnd - lineStart;
if (direction.LengthSquared > 0 &&
(arrows.HasFlag(LineArrows.Start) || arrows.HasFlag(LineArrows.End)))
{
var arrow = new VertexStorage();
arrow.MoveTo(-3, -5);
arrow.LineTo(0, 0);
arrow.LineTo(3, -5);
if (arrows.HasFlag(LineArrows.End))
{
double rotation = Math.Atan2(direction.Y, direction.X);
IVertexSource correctRotation = new VertexSourceApplyTransform(arrow, Affine.NewRotation(rotation - MathHelper.Tau / 4));
IVertexSource inPosition = new VertexSourceApplyTransform(correctRotation, Affine.NewTranslation(lineEnd));
graphics2D.Render(inPosition, theme.TextColor);
}
if (arrows.HasFlag(LineArrows.Start))
{
double rotation = Math.Atan2(direction.Y, direction.X) + MathHelper.Tau / 2;
IVertexSource correctRotation = new VertexSourceApplyTransform(arrow, Affine.NewRotation(rotation - MathHelper.Tau / 4));
IVertexSource inPosition = new VertexSourceApplyTransform(correctRotation, Affine.NewTranslation(lineStart));
graphics2D.Render(inPosition, theme.TextColor);
}
}
}
