// Sets the relativity point, which is essential for most transformations
private void SetRelativityPoint(PointF NewPoint)
{
RealRelatPoint = NewPoint;
ScreenRelativityPoint.X = Normalisation.NormaliseX(RealRelatPoint.X, RealBorders[0], RealBorders[1], MainPB.Width);
ScreenRelativityPoint.Y = Normalisation.NormaliseY(RealRelatPoint.Y, RealBorders[2], RealBorders[3], MainPB.Height);
}
private void SetRelativityPoint(Point NewPoint)
{
ScreenRelativityPoint = NewPoint;
RealRelatPoint.X = (float)Normalisation.DenormaliseX(ScreenRelativityPoint.X, MainPB.Width, RealBorders[0], RealBorders[1]);
RealRelatPoint.Y = (float)Normalisation.DenormaliseY(ScreenRelativityPoint.Y, MainPB.Height, RealBorders[2], RealBorders[3]);
}
// Draws coordinate axes and markers using PaintEventArgs e
private void DrawAxes(PaintEventArgs e)
{
int yAxisXCoordinate = Normalisation.NormaliseX(0, RealBorders[0], RealBorders[1], MainPB.Width), //Coordinates of axes on the graph
xAxisYCoordinate = Normalisation.NormaliseY(0, RealBorders[2], RealBorders[3], MainPB.Height);
bool xAxisVisible = true, yAxisVisible = true;
if (yAxisXCoordinate < 0)
{
yAxisXCoordinate = 0;
yAxisVisible = false;
}
else if (yAxisXCoordinate > MainPB.Width)
{
yAxisXCoordinate = MainPB.Width;
yAxisVisible = false;
}
if (xAxisYCoordinate < 0)
{
xAxisYCoordinate = 0;
xAxisVisible = false;
}
else if (xAxisYCoordinate > MainPB.Height)
{
xAxisYCoordinate = MainPB.Height;
xAxisVisible = false;
}
// Get markers values
float[] XMarkers = Coordinates.SpreadXMarkers(RealBorders[0], RealBorders[1], (RealBorders[1] - RealBorders[0]) / 10);
float[] YMarkers = Coordinates.SpreadYMarkers(RealBorders[2], RealBorders[3], (RealBorders[3] - RealBorders[2]) / 10);
// Get markers screen coordinates
int[] nXMarkers = Normalisation.NormaliseXArray(XMarkers, RealBorders[0], RealBorders[1], MainPB.Width);
int[] nYMarkers = Normalisation.NormaliseYArray(YMarkers, RealBorders[2], RealBorders[3], MainPB.Height);
int MarkersRadius = 3;
// Draw
Font mFont = new Font(Font.FontFamily, 8, FontStyle.Bold);
Pen mPen = new Pen(Color.LightGray, 2);
SolidBrush mBrush = new SolidBrush(Color.Black);
for (int i = 0; i < nXMarkers.Length; i++)
{
e.Graphics.DrawLine(mPen, nXMarkers[i], 0, nXMarkers[i], MainPB.Height);
e.Graphics.FillEllipse(mBrush, nXMarkers[i] - MarkersRadius, xAxisYCoordinate - MarkersRadius, MarkersRadius * 2, MarkersRadius * 2);
e.Graphics.DrawString(XMarkers[i].ToString(), mFont, Brushes.Black, nXMarkers[i],
xAxisYCoordinate + mFont.Height > MainPB.Height ? xAxisYCoordinate - 1.5f * mFont.Height : xAxisYCoordinate + 2);
}
for (int i = 0; i < nYMarkers.Length; i++)
{
e.Graphics.DrawLine(mPen, 0, nYMarkers[i], MainPB.Width, nYMarkers[i]);
e.Graphics.FillEllipse(mBrush, yAxisXCoordinate - MarkersRadius, nYMarkers[i] - MarkersRadius, MarkersRadius * 2, MarkersRadius * 2);
e.Graphics.DrawString(YMarkers[i].ToString(), mFont, Brushes.Black,
yAxisXCoordinate + YMarkers[i].ToString().Length *mFont.Size > MainPB.Width ? yAxisXCoordinate - YMarkers[i].ToString().Length *mFont.Size : yAxisXCoordinate,
nYMarkers[i]);
}
if (yAxisVisible)
{
e.Graphics.DrawLine(new Pen(Color.Black, 2), yAxisXCoordinate, 0, yAxisXCoordinate, MainPB.Height);
}
if (xAxisVisible)
{
e.Graphics.DrawLine(new Pen(Color.Black, 2), 0, xAxisYCoordinate, MainPB.Width, xAxisYCoordinate);
}
}