public static bool IsObjectAt(float ptX, float ptY, TransformParams t, float x1, float y1, float x2, float y2, ref float dist)
{
Utils.ThrowException(t == null ? new ArgumentNullException("t") : null);
Vector2DF pt1 = t.Transform(new Vector2DF(x1, y1));
Vector2DF pt2 = t.Transform(new Vector2DF(x2, y2));
return(VisualizationUtils.TestLineHit(new Vector2DF(ptX, ptY), pt1, pt2, mHitDist, ref dist));
}
public static bool IsObjectAt(float pt_x, float pt_y, TransformParams tr, float x1, float y1, float x2, float y2, ref float dist)
{
Utils.ThrowException(tr.NotSet ? new ArgumentValueException("tr") : null);
Vector2D pt1 = tr.Transform(new Vector2D(x1, y1));
Vector2D pt2 = tr.Transform(new Vector2D(x2, y2));
return(VisualizationUtils.TestLineHit(new Vector2D(pt_x, pt_y), pt1, pt2, m_hit_dist, ref dist));
}
public override IDrawableObject GetObjectAt(float x, float y, TransformParams t, ref float dist)
{
Utils.ThrowException(t == null ? new ArgumentNullException("t") : null);
float width = t.Transform(mWidth);
float height = t.Transform(mHeight);
Vector2DF pos = t.Transform(new Vector2DF(mX - mWidth / 2f, mY - mHeight / 2f));
return(VisualizationUtils.PointInsideRect(x, y, new RectangleF(pos.X, pos.Y, width, height)) ? this : null);
}
public Label(string label, Font font, float x, float y)
{
// TODO: exceptions
mLabel = label;
mFont = font;
mX = x;
mY = y;
VisualizationUtils.MeasureString(label, font, out mWidth, out mHeight);
}
private static bool LineIntersectRectangle(Vector2DF pt1, Vector2DF pt2, RectangleF rect, ref Vector2DF isectPt1, ref Vector2DF isectPt2)
{
// note that this does not work properly in the case when the line lies on one of the rectangle's vertical edges
// this is not a problem for the partial rendering of lines since the rectangles are inflated prior to determining
// intersections
float y = 0, x = 0;
ArrayList <Vector2DF> points = new ArrayList <Vector2DF>(2);
if (LineIntersectVertical(pt1, pt2, rect.X, ref y))
{
if (y > rect.Y && y < rect.Y + rect.Height)
{
points.Add(new Vector2DF(rect.X, y));
}
}
if (LineIntersectVertical(pt1, pt2, rect.X + rect.Width, ref y))
{
if (y > rect.Y && y < rect.Y + rect.Height)
{
points.Add(new Vector2DF(rect.X + rect.Width, y));
}
}
if (LineIntersectHorizontal(pt1, pt2, rect.Y, ref x))
{
if (x > rect.X && x < rect.X + rect.Width)
{
points.Add(new Vector2DF(x, rect.Y));
}
}
if (LineIntersectHorizontal(pt1, pt2, rect.Y + rect.Height, ref x))
{
if (x > rect.X && x < rect.X + rect.Width)
{
points.Add(new Vector2DF(x, rect.Y + rect.Height));
}
}
if (points.Count == 2)
{
isectPt1 = points[0];
isectPt2 = points[1];
return(true);
}
else if (points.Count == 1)
{
isectPt1 = points[0];
isectPt2 = VisualizationUtils.PointInsideRect(pt1.X, pt1.Y, rect) ? pt1 : pt2;
return(true);
}
else if (VisualizationUtils.PointInsideRect(pt1.X, pt1.Y, rect) && VisualizationUtils.PointInsideRect(pt2.X, pt2.Y, rect))
{
isectPt1 = pt1;
isectPt2 = pt2;
return(true);
}
return(false);
}
public static bool IsObjectAt(Image image, float x, float y, float ptX, float ptY, TransformParams t)
{
Utils.ThrowException(t == null ? new ArgumentNullException("t") : null);
// TODO: other exceptions
float width = t.Transform(image.Width);
float height = t.Transform(image.Height);
Vector2DF pos = t.Transform(new Vector2DF(x, y));
return(VisualizationUtils.PointInsideRect(ptX, ptY, new RectangleF(pos.X, pos.Y, width, height)));
}
private static bool LineIntersectRectangle(Vector2D pt1, Vector2D pt2, RectangleF rect, ref Vector2D isect_pt1, ref Vector2D isect_pt2)
{
float y = 0, x = 0;
ArrayList <Vector2D> points = new ArrayList <Vector2D>(2);
if (LineIntersectVertical(pt1, pt2, rect.X, ref y))
{
if (y > rect.Y && y < rect.Y + rect.Height)
{
points.Add(new Vector2D(rect.X, y));
}
}
if (LineIntersectVertical(pt1, pt2, rect.X + rect.Width, ref y))
{
if (y > rect.Y && y < rect.Y + rect.Height)
{
points.Add(new Vector2D(rect.X + rect.Width, y));
}
}
if (LineIntersectHorizontal(pt1, pt2, rect.Y, ref x))
{
if (x > rect.X && x < rect.X + rect.Width)
{
points.Add(new Vector2D(x, rect.Y));
}
}
if (LineIntersectHorizontal(pt1, pt2, rect.Y + rect.Height, ref x))
{
if (x > rect.X && x < rect.X + rect.Width)
{
points.Add(new Vector2D(x, rect.Y + rect.Height));
}
}
if (points.Count == 2)
{
isect_pt1 = points[0];
isect_pt2 = points[1];
return(true);
}
else if (points.Count == 1)
{
isect_pt1 = points[0];
isect_pt2 = VisualizationUtils.PointInsideRect(pt1.X, pt1.Y, rect) ? pt1 : pt2;
return(true);
}
else if (VisualizationUtils.PointInsideRect(pt1.X, pt1.Y, rect) && VisualizationUtils.PointInsideRect(pt2.X, pt2.Y, rect))
{
isect_pt1 = pt1;
isect_pt2 = pt2;
return(true);
}
return(false);
}
public static BoundingArea GetBoundingArea(float x1, float y1, float x2, float y2)
{
#if !SIMPLE_BOUNDING_AREA
if (x1 == x2 || y1 == y2)
{
return(new BoundingArea(VisualizationUtils.CreateRectangle(x1, y1, x2, y2)));
}
float delta = Math.Abs((x2 - x1) / (y2 - y1));
float stepMax = (float)Math.Sqrt(mMaxBoxArea / delta + delta * mMaxBoxArea);
Vector2DF line = new Vector2DF(x1, y1, x2, y2);
float lineLen = line.GetLength();
if (stepMax >= lineLen)
{
return(new BoundingArea(VisualizationUtils.CreateRectangle(x1, y1, x2, y2)));
}
BoundingArea boundingArea = new BoundingArea();
int steps = (int)Math.Ceiling(lineLen / stepMax);
Vector2DF stepVec = line;
stepVec.SetLength(lineLen / (float)steps);
Vector2DF pt1 = new Vector2DF(x1, y1);
Vector2DF pt2;
for (int i = 0; i < steps - 1; i++)
{
pt2 = pt1 + stepVec;
boundingArea.AddRectangles(VisualizationUtils.CreateRectangle(pt1.X, pt1.Y, pt2.X, pt2.Y));
pt1 = pt2;
}
pt2 = new Vector2DF(x2, y2);
boundingArea.AddRectangles(VisualizationUtils.CreateRectangle(pt1.X, pt1.Y, pt2.X, pt2.Y));
return(boundingArea);
#else
BoundingArea boundingArea = new BoundingArea();
boundingArea.AddRectangles(VisualizationUtils.CreateRectangle(x1, y1, x2, y2));
return(boundingArea);
#endif
}
