public void DrawViewLine(ViewLines viewlines)
{
double slope;
double intercept;
switch (viewlines)
{
case ViewLines.origin:
if (y - mainWindow.viewPoint.Y == 0)
slope = 0;
else if (x - mainWindow.viewPoint.X == 0)
slope = -1 * Math.Sign(y - mainWindow.viewPoint.Y) * 10000;
else //Calculate y slope
slope = (y - mainWindow.viewPoint.Y) / (x - mainWindow.viewPoint.X);
//Generate line
startLine = new Line();
startLine.X1 = x;
startLine.Y1 = y; //Start point
intercept = startLine.Y1 - startLine.X1 * slope;
if (x > mainWindow.viewPoint.X)
startLine.X2 = mainWindow.WindowBottomRight.X;
else
startLine.X2 = mainWindow.WindowTopLeft.X;
startLine.Y2 = slope * startLine.X2 + intercept; // y = mx + b ololol
//Check if the y value is outside the window bounds. if it is, set y value to window bounds and calculate x from it instead.
if (startLine.Y2 > mainWindow.WindowBottomRight.Y)
{
startLine.Y2 = mainWindow.WindowBottomRight.Y;
startLine.X2 = (startLine.Y2 - intercept) / slope;
}
else if (startLine.Y2 < mainWindow.WindowTopLeft.Y)
{
startLine.Y2 = mainWindow.WindowTopLeft.Y;
startLine.X2 = (startLine.Y2 - intercept) / slope;
}
break;
case ViewLines.endpoint:
if (next.y - mainWindow.viewPoint.Y == 0)
slope = 0;
else if (next.x - mainWindow.viewPoint.X == 0)
slope = -1 * Math.Sign(next.y - mainWindow.viewPoint.Y) * 1000000;
else //Calculate y slope
slope = (next.y - mainWindow.viewPoint.Y) / (next.x - mainWindow.viewPoint.X);
//Generate line
endLine = new Line();
endLine.X1 = next.x;
endLine.Y1 = next.y;
intercept = endLine.Y1 - endLine.X1 * slope;
if (next.x > mainWindow.viewPoint.X)
endLine.X2 = mainWindow.WindowBottomRight.X;
else
endLine.X2 = mainWindow.WindowTopLeft.X;
endLine.Y2 = slope * endLine.X2 + intercept;
//Check if the y value is outside the window bounds. if it is, set y value to window bounds and calculate x from it instead.
if (endLine.Y2 > mainWindow.WindowBottomRight.Y)
{
endLine.Y2 = mainWindow.WindowBottomRight.Y;
endLine.X2 = (endLine.Y2 - intercept) / slope;
}
else if (endLine.Y2 < mainWindow.WindowTopLeft.Y)
{
endLine.Y2 = mainWindow.WindowTopLeft.Y;
endLine.X2 = (endLine.Y2 - intercept) / slope;
}
break;
case ViewLines.both:
DrawViewLine(ViewLines.origin);
DrawViewLine(ViewLines.endpoint);
break;
}
}
public void DrawViewLine(ViewLines viewlines)
{
double slope;
double intercept;
switch (viewlines)
{
case ViewLines.origin:
if (y - mainWindow.viewPoint.Y == 0)
{
slope = 0;
}
else if (x - mainWindow.viewPoint.X == 0)
{
slope = -1 * Math.Sign(y - mainWindow.viewPoint.Y) * 10000;
}
else //Calculate y slope
{
slope = (y - mainWindow.viewPoint.Y) / (x - mainWindow.viewPoint.X);
}
//Generate line
startLine = new Line();
startLine.X1 = x;
startLine.Y1 = y; //Start point
intercept = startLine.Y1 - startLine.X1 * slope;
if (x > mainWindow.viewPoint.X)
{
startLine.X2 = mainWindow.WindowBottomRight.X;
}
else
{
startLine.X2 = mainWindow.WindowTopLeft.X;
}
startLine.Y2 = slope * startLine.X2 + intercept; // y = mx + b ololol
//Check if the y value is outside the window bounds. if it is, set y value to window bounds and calculate x from it instead.
if (startLine.Y2 > mainWindow.WindowBottomRight.Y)
{
startLine.Y2 = mainWindow.WindowBottomRight.Y;
startLine.X2 = (startLine.Y2 - intercept) / slope;
}
else if (startLine.Y2 < mainWindow.WindowTopLeft.Y)
{
startLine.Y2 = mainWindow.WindowTopLeft.Y;
startLine.X2 = (startLine.Y2 - intercept) / slope;
}
break;
case ViewLines.endpoint:
if (next.y - mainWindow.viewPoint.Y == 0)
{
slope = 0;
}
else if (next.x - mainWindow.viewPoint.X == 0)
{
slope = -1 * Math.Sign(next.y - mainWindow.viewPoint.Y) * 1000000;
}
else //Calculate y slope
{
slope = (next.y - mainWindow.viewPoint.Y) / (next.x - mainWindow.viewPoint.X);
}
//Generate line
endLine = new Line();
endLine.X1 = next.x;
endLine.Y1 = next.y;
intercept = endLine.Y1 - endLine.X1 * slope;
if (next.x > mainWindow.viewPoint.X)
{
endLine.X2 = mainWindow.WindowBottomRight.X;
}
else
{
endLine.X2 = mainWindow.WindowTopLeft.X;
}
endLine.Y2 = slope * endLine.X2 + intercept;
//Check if the y value is outside the window bounds. if it is, set y value to window bounds and calculate x from it instead.
if (endLine.Y2 > mainWindow.WindowBottomRight.Y)
{
endLine.Y2 = mainWindow.WindowBottomRight.Y;
endLine.X2 = (endLine.Y2 - intercept) / slope;
}
else if (endLine.Y2 < mainWindow.WindowTopLeft.Y)
{
endLine.Y2 = mainWindow.WindowTopLeft.Y;
endLine.X2 = (endLine.Y2 - intercept) / slope;
}
break;
case ViewLines.both:
DrawViewLine(ViewLines.origin);
DrawViewLine(ViewLines.endpoint);
break;
}
}
