public static bool PointIsBetween(Point point, Shape.Line line)
{
var crossproduct = (point.Y - line.StartY) * (line.EndX - line.StartX) - (point.X - line.StartX) * (line.EndY - line.StartY);
if (Math.Abs(crossproduct) > 0.000000001)
{
return(false);
}
var dotproduct = (point.X - line.StartX) * (line.EndX - line.StartX) + (point.Y - line.StartY) * (line.EndY - line.StartY);
if (dotproduct < 0)
{
return(false);
}
var squaredlengthba = (line.EndX - line.StartX) * (line.EndX - line.StartX) + (line.EndY - line.StartY) * (line.EndY - line.StartY);
if (dotproduct > squaredlengthba)
{
return(false);
}
return(true);
}
/// <summary>
/// 根据点列表生成直线列表
/// </summary>
/// <param name="listPoint"></param>
/// <param name="isAddToGlobal">判断线段要不要加到全局的变量中，true要</param>
/// <returns></returns>
public List <BaseShape> addLine(List <PointF> listPoint, bool isAddToGlobal)
{
List <BaseShape> listLine = new List <BaseShape>();
for (int i = 0; i < listPoint.Count; i++)
{
if (i == listPoint.Count - 1)
{
Line line = new Shape.Line(listPoint[i], listPoint[0]);
if (isAddToGlobal)
{
//line.ShapeID = CADInterface.globalID;
//CADInterface.globalID = CADInterface.globalID + 1;
}
listLine.Add(line);
}
else
{
Line line = new Shape.Line(listPoint[i], listPoint[i + 1]);
if (isAddToGlobal)
{
//line.ShapeID = CADInterface.globalID;
//CADInterface.globalID = CADInterface.globalID + 1;
}
listLine.Add(line);
}
}
return(listLine);
}
public override void onUpdate()
{
checkInput();
if (movingup)
{
imagey--;
}
string imagepath = Environment.CurrentDirectory + @"\..\..\res\demoimage.png"; //this is /bin/Debug/ btw
Prop demoimage = new Prop(new Bitmap(imagepath), 150, 150);
scene.render(demoimage, 0, imagey);
Rect rect1 = new Rect(0, 0, 60, 60);
Rect rect2 = new Rect(10, 10, 40, 40);
if (rect1.intersects(rect2))
{
//Console.WriteLine("intersecting!");
}
Shape.Triangle tri = new Shape.Triangle(50, 50, false);
Shape.Rectangle rect = new Shape.Rectangle(45, 80, true);
Shape.Ellipse ell = new Shape.Ellipse(30, 50);
Shape.Line li = new Shape.Line(600, 400, 650, 350);
scene.render(tri, 100, 100, 2, Brushes.Blue);
scene.render(rect, 300, 300, 1, Brushes.Green);
scene.render(ell, 50, 50, 3, Brushes.Red);
scene.render(li, 4, Brushes.Yellow);
int mx = scene.getMouseX();
int my = scene.getMouseY();
scene.render(mx.ToString(), 0, 0);
scene.render(my.ToString(), 0, 10);
scene.render("Vector result: " + vector.ToString(), 200, 100);
//THIS CODE DEMOS BACKGROUNDS
//BUT ALSO MAKES THE WINDOW MORE CLUTTERED (BAD FOR THE DEMO)
//scene.renderBackground(demoimage, true);
particles.addParticle(particleProp);
particles.addParticle(particleProp2);
particles.step();
scene.render(particles, 400, 300);
}
public static Shape.Line MoveLine(Shape.Line line, Point location)
{
line.StartX = line.StartX - location.X;
line.StartY = line.StartY - location.Y;
return(line);
}
public static void LogMoving(Shape.Line line, StatusBarPanel statusBP)
{
statusBP.Text = ($"\"{line.Name}\" got a new position: start ({line.StartX}, {line.StartY}), end ({line.EndX}, {line.EndY})");
}
