public void CanGetIntersectionPoint()
{
var line = new Line2D(2, 0);
var secondLine = new Line2D(3, 1);
Assert.AreEqual(new Point2D(-1, -2), line.GetIntersectionPoint(secondLine));
}
public void CanFindIntersectionPoint()
{
// 0.5x - 1
var firstLine = new Line2D(0.5, -1);
// -2x - 6
var secondLine = new Line2D(-2, -6);
var intersectionPoint = firstLine.GetIntersectionPoint(secondLine);
Assert.AreEqual(-2, intersectionPoint.X);
Assert.AreEqual(-2, intersectionPoint.Y);
}
public void CanFindIntersectionPoint()
{
// 0.5x - 1
var firstLine = new Line2D(0.5, -1);
// -2x - 6
var secondLine = new Line2D(-2, -6);
var intersectionPoint = firstLine.GetIntersectionPoint(secondLine);
Assert.AreEqual(-2, intersectionPoint.X);
Assert.AreEqual(-2, intersectionPoint.Y);
}
// This returns the aligned and snapped draw position
public static DrawnVertex GetCurrentPosition(Vector2D mousemappos, bool snaptonearest, bool snaptogrid, bool snaptocardinal, bool usefourcardinaldirections, IRenderer2D renderer, List <DrawnVertex> points)
{
DrawnVertex p = new DrawnVertex();
p.stitch = true; //mxd. Setting these to false seems to be a good way to create invalid geometry...
p.stitchline = true; //mxd
snaptocardinal = (snaptocardinal && points.Count > 0); //mxd. Don't snap to cardinal when there are no points
//mxd. If snap to cardinal directions is enabled and we have points, modify mouse position
Vector2D vm, gridoffset;
if (snaptocardinal)
{
Vector2D offset = mousemappos - points[points.Count - 1].pos;
float angle;
if (usefourcardinaldirections)
{
angle = Angle2D.DegToRad((General.ClampAngle((int)Angle2D.RadToDeg(offset.GetAngle()))) / 90 * 90 + 45);
}
else
{
angle = Angle2D.DegToRad((General.ClampAngle((int)Angle2D.RadToDeg(offset.GetAngle()) + 22)) / 45 * 45);
}
offset = new Vector2D(0, -offset.GetLength()).GetRotated(angle);
vm = points[points.Count - 1].pos + offset;
//mxd. We need to be snapped relative to initial position
Vector2D prev = points[points.Count - 1].pos;
gridoffset = prev - General.Map.Grid.SnappedToGrid(prev);
}
else
{
vm = mousemappos;
gridoffset = new Vector2D();
}
float vrange = BuilderPlug.Me.StitchRange / renderer.Scale;
// Snap to nearest?
if (snaptonearest)
{
// Go for all drawn points
foreach (DrawnVertex v in points)
{
if (Vector2D.DistanceSq(vm, v.pos) < (vrange * vrange))
{
p.pos = v.pos;
return(p);
}
}
// Try the nearest vertex
Vertex nv = General.Map.Map.NearestVertexSquareRange(vm, vrange);
if (nv != null)
{
//mxd. Line angle must stay the same
if (snaptocardinal)
{
Line2D ourline = new Line2D(points[points.Count - 1].pos, vm);
if (Math.Round(ourline.GetSideOfLine(nv.Position), 1) == 0)
{
p.pos = nv.Position;
return(p);
}
}
else
{
p.pos = nv.Position;
return(p);
}
}
// Try the nearest linedef. mxd. We'll need much bigger stitch distance when snapping to cardinal directions
Linedef nl = General.Map.Map.NearestLinedefRange(vm, BuilderPlug.Me.StitchRange / renderer.Scale);
if (nl != null)
{
//mxd. Line angle must stay the same
if (snaptocardinal)
{
Line2D ourline = new Line2D(points[points.Count - 1].pos, vm);
Line2D nearestline = new Line2D(nl.Start.Position, nl.End.Position);
Vector2D intersection = Line2D.GetIntersectionPoint(nearestline, ourline, false);
if (!float.IsNaN(intersection.x))
{
// Intersection is on nearestline?
float u = Line2D.GetNearestOnLine(nearestline.v1, nearestline.v2, intersection);
if (u < 0f || u > 1f)
{
}
else
{
p.pos = new Vector2D((float)Math.Round(intersection.x, General.Map.FormatInterface.VertexDecimals),
(float)Math.Round(intersection.y, General.Map.FormatInterface.VertexDecimals));
return(p);
}
}
}
// Snap to grid?
else if (snaptogrid)
{
// Get grid intersection coordinates
List <Vector2D> coords = nl.GetGridIntersections(General.Map.Grid.GridRotate,
General.Map.Grid.GridOriginX, General.Map.Grid.GridOriginY);
// Find nearest grid intersection
bool found = false;
float found_distance = float.MaxValue;
Vector2D found_coord = new Vector2D();
foreach (Vector2D v in coords)
{
Vector2D delta = vm - v;
if (delta.GetLengthSq() < found_distance)
{
found_distance = delta.GetLengthSq();
found_coord = v;
found = true;
}
}
if (found)
{
// Align to the closest grid intersection
p.pos = found_coord;
return(p);
}
}
else
{
// Aligned to line
p.pos = nl.NearestOnLine(vm);
return(p);
}
}
}
else
{
// Always snap to the first drawn vertex so that the user can finish a complete sector without stitching
if (points.Count > 0)
{
if (Vector2D.DistanceSq(vm, points[0].pos) < (vrange * vrange))
{
p.pos = points[0].pos;
return(p);
}
}
}
// if the mouse cursor is outside the map bondaries check if the line between the last set point and the
// mouse cursor intersect any of the boundary lines. If it does, set the position to this intersection
if (points.Count > 0 &&
(mousemappos.x < General.Map.Config.LeftBoundary || mousemappos.x > General.Map.Config.RightBoundary ||
mousemappos.y > General.Map.Config.TopBoundary || mousemappos.y < General.Map.Config.BottomBoundary))
{
Line2D dline = new Line2D(mousemappos, points[points.Count - 1].pos);
bool foundintersection = false;
float u = 0.0f;
List <Line2D> blines = new List <Line2D>();
// lines for left, top, right and bottom boundaries
blines.Add(new Line2D(General.Map.Config.LeftBoundary, General.Map.Config.BottomBoundary, General.Map.Config.LeftBoundary, General.Map.Config.TopBoundary));
blines.Add(new Line2D(General.Map.Config.LeftBoundary, General.Map.Config.TopBoundary, General.Map.Config.RightBoundary, General.Map.Config.TopBoundary));
blines.Add(new Line2D(General.Map.Config.RightBoundary, General.Map.Config.TopBoundary, General.Map.Config.RightBoundary, General.Map.Config.BottomBoundary));
blines.Add(new Line2D(General.Map.Config.RightBoundary, General.Map.Config.BottomBoundary, General.Map.Config.LeftBoundary, General.Map.Config.BottomBoundary));
// check for intersections with boundaries
for (int i = 0; i < blines.Count; i++)
{
if (!foundintersection)
{
// only check for intersection if the last set point is not on the
// line we are checking against
if (blines[i].GetSideOfLine(points[points.Count - 1].pos) != 0.0f)
{
foundintersection = blines[i].GetIntersection(dline, out u);
}
}
}
// if there was no intersection set the position to the last set point
if (!foundintersection)
{
vm = points[points.Count - 1].pos;
}
else
{
vm = dline.GetCoordinatesAt(u);
}
}
// Snap to grid?
if (snaptogrid)
{
// Aligned to grid
p.pos = General.Map.Grid.SnappedToGrid(vm - gridoffset) + gridoffset;
// special handling
if (p.pos.x > General.Map.Config.RightBoundary)
{
p.pos.x = General.Map.Config.RightBoundary;
}
if (p.pos.y < General.Map.Config.BottomBoundary)
{
p.pos.y = General.Map.Config.BottomBoundary;
}
return(p);
}
else
{
// Normal position
p.pos.x = (float)Math.Round(vm.x); //mxd
p.pos.y = (float)Math.Round(vm.y); //mxd
return(p);
}
}
//mxd
protected void RenderGuidelines(Vector2D start, Vector2D end, PixelColor c)
{
if (end.x != start.x && end.y != start.y)
{
Vector2D tr = new Vector2D(Math.Max(end.x, start.x), Math.Max(end.y, start.y));
Vector2D bl = new Vector2D(Math.Min(end.x, start.x), Math.Min(end.y, start.y));
// Create guidelines
Line3D[] lines = new Line3D[5];
lines[0] = new Line3D(new Vector2D(tr.x, General.Map.Config.TopBoundary), new Vector2D(tr.x, General.Map.Config.BottomBoundary), c, false);
lines[1] = new Line3D(new Vector2D(bl.x, General.Map.Config.TopBoundary), new Vector2D(bl.x, General.Map.Config.BottomBoundary), c, false);
lines[2] = new Line3D(new Vector2D(General.Map.Config.LeftBoundary, tr.y), new Vector2D(General.Map.Config.RightBoundary, tr.y), c, false);
lines[3] = new Line3D(new Vector2D(General.Map.Config.LeftBoundary, bl.y), new Vector2D(General.Map.Config.RightBoundary, bl.y), c, false);
// Create current line extent. Make sure v1 is to the left of v2
Line2D current = (end.x < start.x ? new Line2D(end, start) : new Line2D(start, end));
Vector2D extentstart, extentend;
if (current.v1.y < current.v2.y) // Start is lower
{
// Start point can hit left or bottom boundaries
extentstart = Line2D.GetIntersectionPoint(left, current, false);
if (extentstart.y < General.Map.Config.BottomBoundary)
{
extentstart = Line2D.GetIntersectionPoint(bottom, current, false);
}
// End point can hit right or top boundaries
extentend = Line2D.GetIntersectionPoint(right, current, false);
if (extentend.y > General.Map.Config.TopBoundary)
{
extentend = Line2D.GetIntersectionPoint(top, current, false);
}
}
else // Start is higher
{
// Start point can hit left or top boundaries
extentstart = Line2D.GetIntersectionPoint(left, current, false);
if (extentstart.y > General.Map.Config.TopBoundary)
{
extentstart = Line2D.GetIntersectionPoint(top, current, false);
}
// End point can hit right or bottom boundaries
extentend = Line2D.GetIntersectionPoint(right, current, false);
if (extentend.y < General.Map.Config.BottomBoundary)
{
extentend = Line2D.GetIntersectionPoint(bottom, current, false);
}
}
lines[4] = new Line3D(extentstart, extentend, c, false);
// Render them
renderer.RenderArrows(lines);
// Update horiz/vert length labels
if (guidelabels != null)
{
guidelabels[0].Move(tr, new Vector2D(tr.x, bl.y));
guidelabels[1].Move(new Vector2D(bl.x, tr.y), tr);
guidelabels[2].Move(new Vector2D(tr.x, bl.y), bl);
guidelabels[3].Move(bl, new Vector2D(bl.x, tr.y));
}
}
// Render horizontal line + 2 vertical guidelines
else if (end.x != start.x)
{
Line3D l = new Line3D(new Vector2D(General.Map.Config.LeftBoundary, end.y), new Vector2D(General.Map.Config.RightBoundary, end.y), c, false);
Line3D gs = new Line3D(new Vector2D(start.x, General.Map.Config.TopBoundary), new Vector2D(start.x, General.Map.Config.BottomBoundary), c, false);
Line3D ge = new Line3D(new Vector2D(end.x, General.Map.Config.TopBoundary), new Vector2D(end.x, General.Map.Config.BottomBoundary), c, false);
renderer.RenderArrows(new List <Line3D> {
l, gs, ge
});
}
// Render vertical line + 2 horizontal guidelines
else if (end.y != start.y)
{
Line3D l = new Line3D(new Vector2D(end.x, General.Map.Config.TopBoundary), new Vector2D(end.x, General.Map.Config.BottomBoundary), c, false);
Line3D gs = new Line3D(new Vector2D(General.Map.Config.LeftBoundary, start.y), new Vector2D(General.Map.Config.RightBoundary, start.y), c, false);
Line3D ge = new Line3D(new Vector2D(General.Map.Config.LeftBoundary, end.y), new Vector2D(General.Map.Config.RightBoundary, end.y), c, false);
renderer.RenderArrows(new List <Line3D> {
l, gs, ge
});
}
// Start and end match. Render a cross
else
{
Line3D gs = new Line3D(new Vector2D(General.Map.Config.LeftBoundary, start.y), new Vector2D(General.Map.Config.RightBoundary, start.y), c, false);
Line3D ge = new Line3D(new Vector2D(start.x, General.Map.Config.TopBoundary), new Vector2D(start.x, General.Map.Config.BottomBoundary), c, false);
renderer.RenderArrows(new List <Line3D> {
gs, ge
});
}
}
// This checks if the view offset/zoom changed and updates the check (never used. mxd)
/*protected bool CheckViewChanged()
* {
* // View changed?
* bool viewchanged = (renderer.OffsetX != lastoffsetx || renderer.OffsetY != lastoffsety || renderer.Scale != lastscale);
*
* // Keep view information
* lastoffsetx = renderer.OffsetX;
* lastoffsety = renderer.OffsetY;
* lastscale = renderer.Scale;
*
* // Return result
* return viewchanged;
* }*/
// This updates the dragging
protected virtual void Update()
{
PixelColor stitchcolor = General.Colors.Highlight;
PixelColor losecolor = General.Colors.Selection;
snaptocardinaldirection = General.Interface.ShiftState && General.Interface.AltState; //mxd
snaptogrid = (snaptocardinaldirection || General.Interface.ShiftState ^ General.Interface.SnapToGrid);
snaptonearest = General.Interface.CtrlState ^ General.Interface.AutoMerge;
DrawnVertex curp = GetCurrentPosition();
float vsize = (renderer.VertexSize + 1.0f) / renderer.Scale;
// Update label positions (mxd)
if (labels.Count > 0)
{
// Update labels for already drawn lines
for (int i = 0; i < labels.Count - 1; i++)
{
labels[i].ShowAngle = showguidelines;
labels[i].Move(points[i].pos, points[i + 1].pos);
}
// Update label for active line
labels[labels.Count - 1].ShowAngle = showguidelines;
labels[labels.Count - 1].Move(points[points.Count - 1].pos, curp.pos);
}
// Render drawing lines
if (renderer.StartOverlay(true))
{
// Go for all points to draw lines
PixelColor color;
if (points.Count > 0)
{
//mxd
bool renderguidelabels = false;
if (showguidelines)
{
Vector2D prevp = points[points.Count - 1].pos;
PixelColor c = General.Colors.InfoLine.WithAlpha(80);
if (curp.pos.x != prevp.x && curp.pos.y != prevp.y)
{
renderguidelabels = true;
Vector2D tr = new Vector2D(Math.Max(curp.pos.x, prevp.x), Math.Max(curp.pos.y, prevp.y));
Vector2D bl = new Vector2D(Math.Min(curp.pos.x, prevp.x), Math.Min(curp.pos.y, prevp.y));
// Create guidelines
Line3D[] lines = new Line3D[5];
lines[0] = new Line3D(new Vector2D(tr.x, General.Map.Config.TopBoundary), new Vector2D(tr.x, General.Map.Config.BottomBoundary), c, false);
lines[1] = new Line3D(new Vector2D(bl.x, General.Map.Config.TopBoundary), new Vector2D(bl.x, General.Map.Config.BottomBoundary), c, false);
lines[2] = new Line3D(new Vector2D(General.Map.Config.LeftBoundary, tr.y), new Vector2D(General.Map.Config.RightBoundary, tr.y), c, false);
lines[3] = new Line3D(new Vector2D(General.Map.Config.LeftBoundary, bl.y), new Vector2D(General.Map.Config.RightBoundary, bl.y), c, false);
// Create current line extent. Make sure v1 is to the left of v2
Line2D current = (curp.pos.x < prevp.x ? new Line2D(curp.pos, prevp) : new Line2D(prevp, curp.pos));
Vector2D extentstart, extentend;
if (current.v1.y < current.v2.y) // Start is lower
{
// Start point can hit left or bottom boundaries
extentstart = Line2D.GetIntersectionPoint(left, current, false);
if (extentstart.y < General.Map.Config.BottomBoundary)
{
extentstart = Line2D.GetIntersectionPoint(bottom, current, false);
}
// End point can hit right or top boundaries
extentend = Line2D.GetIntersectionPoint(right, current, false);
if (extentend.y > General.Map.Config.TopBoundary)
{
extentend = Line2D.GetIntersectionPoint(top, current, false);
}
}
else // Start is higher
{
// Start point can hit left or top boundaries
extentstart = Line2D.GetIntersectionPoint(left, current, false);
if (extentstart.y > General.Map.Config.TopBoundary)
{
extentstart = Line2D.GetIntersectionPoint(top, current, false);
}
// End point can hit right or bottom boundaries
extentend = Line2D.GetIntersectionPoint(right, current, false);
if (extentend.y < General.Map.Config.BottomBoundary)
{
extentend = Line2D.GetIntersectionPoint(bottom, current, false);
}
}
lines[4] = new Line3D(extentstart, extentend, c, false);
// Render them
renderer.RenderArrows(lines);
// Update horiz/vert length labels
guidelabels[0].Move(tr, new Vector2D(tr.x, bl.y));
guidelabels[1].Move(new Vector2D(bl.x, tr.y), tr);
guidelabels[2].Move(new Vector2D(tr.x, bl.y), bl);
guidelabels[3].Move(bl, new Vector2D(bl.x, tr.y));
}
// Render horizontal line
else if (curp.pos.x != prevp.x)
{
Line3D l = new Line3D(new Vector2D(General.Map.Config.LeftBoundary, curp.pos.y), new Vector2D(General.Map.Config.RightBoundary, curp.pos.y), c, false);
renderer.RenderArrows(new List <Line3D> {
l
});
}
// Render vertical line
else if (curp.pos.y != prevp.y)
{
Line3D l = new Line3D(new Vector2D(curp.pos.x, General.Map.Config.TopBoundary), new Vector2D(curp.pos.x, General.Map.Config.BottomBoundary), c, false);
renderer.RenderArrows(new List <Line3D> {
l
});
}
}
// Render lines
DrawnVertex lastp = points[0];
for (int i = 1; i < points.Count; i++)
{
// Determine line color
if (lastp.stitchline && points[i].stitchline)
{
color = stitchcolor;
}
else
{
color = losecolor;
}
// Render line
renderer.RenderLine(lastp.pos, points[i].pos, LINE_THICKNESS, color, true);
RenderLinedefDirectionIndicator(lastp.pos, points[i].pos, color); //mxd
lastp = points[i];
}
// Determine line color
color = (lastp.stitchline && snaptonearest ? stitchcolor : losecolor);
// Render line to cursor
renderer.RenderLine(lastp.pos, curp.pos, LINE_THICKNESS, color, true);
RenderLinedefDirectionIndicator(lastp.pos, curp.pos, color); //mxd
// Render vertices
for (int i = 0; i < points.Count; i++)
{
// Determine vertex color
color = points[i].stitch ? stitchcolor : losecolor;
// Render vertex
renderer.RenderRectangleFilled(new RectangleF(points[i].pos.x - vsize, points[i].pos.y - vsize, vsize * 2.0f, vsize * 2.0f), color, true);
}
//mxd. Render guide labels?
if (renderguidelabels)
{
renderer.RenderText(guidelabels);
}
// Render labels
renderer.RenderText(labels.ToArray());
}
// Determine point color
color = snaptonearest ? stitchcolor : losecolor;
// Render vertex at cursor
renderer.RenderRectangleFilled(new RectangleF(curp.pos.x - vsize, curp.pos.y - vsize, vsize * 2.0f, vsize * 2.0f), color, true);
// Done
renderer.Finish();
}
// Done
renderer.Present();
}
public void CanGetIntersectionPoint()
{
var line = new Line2D(2, 0);
var secondLine = new Line2D(3, 1);
Assert.AreEqual(new Point2D(-1, -2), line.GetIntersectionPoint(secondLine));
}
