/* adjust scale of a plot */
void _calcPlotScale(ScopePlot plot)
{
if (LockScale)
{
return;
}
int ipa = plot.StartIndex(BoundingBox.Width);
var maxV = plot.MaxValues;
var minV = plot.MinValues;
double max = 0;
double gridMax = mScale;
for (int i = 0; i != BoundingBox.Width; i++)
{
int ip = (i + ipa) & (mScopePointCount - 1);
if (max < maxV[ip])
{
max = maxV[ip];
}
if (minV[ip] < -max)
{
max = -minV[ip];
}
}
/* scale fixed at maximum? */
if (mMaxScale)
{
gridMax = Math.Max(max, gridMax);
}
else
{
/* adjust in powers of two */
while (gridMax < max)
{
gridMax *= 2;
}
}
mScale = gridMax;
}
void _drawPlot(CustomGraphics g, ScopePlot plot, bool selected)
{
if (plot.Elm == null)
{
return;
}
int i;
int multptr = 0;
int x = 0;
int maxy = (BoundingBox.Height - 1) / 2;
int y = maxy;
var color = (mSomethingSelected) ? Color.FromArgb(0xA0, 0xA0, 0xA0) : plot.Color;
if (selected || (CirSim.Sim.ScopeSelected == -1 && plot.Elm.IsMouseElm))
{
color = CustomGraphics.SelectColor;
}
else if (ControlPanel.ChkPrintable.Checked)
{
color = CustomGraphics.GrayColor;
}
var ipa = plot.StartIndex(BoundingBox.Width);
var maxV = plot.MaxValues;
var minV = plot.MinValues;
var gridMax = mScale;
/* if we don't have overlapping scopes of different units, we can move zero around.
* Put it at the bottom if the scope is never negative. */
double mx = gridMax;
double mn = 0;
if (mMaxScale)
{
/* scale is maxed out, so fix boundaries of scope at maximum and minimum. */
mx = mMaxValue;
mn = mMinValue;
}
else if (mShowNegative || mMinValue < (mx + mn) * .5 - (mx - mn) * .55)
{
mn = -gridMax;
mShowNegative = true;
}
var gridMid = (mx + mn) * .5;
gridMax = (mx - mn) * .55; /* leave space at top and bottom */
double gridMult = maxy / gridMax;
if (selected)
{
mMainGridMult = gridMult;
mMainGridMid = gridMid;
}
int minRangeLo = -10 - (int)(gridMid * gridMult);
int minRangeHi = 10 - (int)(gridMid * gridMult);
mGridStepY = 1e-8;
while (mGridStepY < 20 * gridMax / maxy)
{
mGridStepY *= MULTA[(multptr++) % 3];
}
/* Horizontal gridlines */
int ll;
var minorDiv = Color.FromArgb(0x30, 0x30, 0x30);
var majorDiv = Color.FromArgb(0xA0, 0xA0, 0xA0);
if (ControlPanel.ChkPrintable.Checked)
{
minorDiv = Color.FromArgb(0xD0, 0xD0, 0xD0);
majorDiv = Color.FromArgb(0x80, 0x80, 0x80);
}
/* Vertical (T) gridlines */
double ts = ControlPanel.TimeStep * Speed;
mGridStepX = CalcGridStepX();
if (mDrawGridLines)
{
/* horizontal gridlines */
/* don't show gridlines if lines are too close together (except for center line) */
bool showGridLines = (mGridStepY != 0);
for (ll = -100; ll <= 100; ll++)
{
if (ll != 0 && !showGridLines)
{
continue;
}
int yl = maxy - (int)((ll * mGridStepY - gridMid) * gridMult);
if (yl < 0 || yl >= BoundingBox.Height - 1)
{
continue;
}
g.LineColor = ll == 0 ? majorDiv : minorDiv;
g.DrawLine(0, yl, BoundingBox.Width - 1, yl);
}
/* vertical gridlines */
double tstart = CirSim.Sim.Time - ControlPanel.TimeStep * Speed * BoundingBox.Width;
double tx = CirSim.Sim.Time - (CirSim.Sim.Time % mGridStepX);
for (ll = 0; ; ll++)
{
double tl = tx - mGridStepX * ll;
int gx = (int)((tl - tstart) / ts);
if (gx < 0)
{
break;
}
if (gx >= BoundingBox.Width)
{
continue;
}
if (tl < 0)
{
continue;
}
if (((tl + mGridStepX / 4) % (mGridStepX * 10)) < mGridStepX)
{
g.LineColor = majorDiv;
}
else
{
g.LineColor = minorDiv;
}
g.DrawLine(gx, 0, gx, BoundingBox.Height - 1);
}
}
/* only need gridlines drawn once */
mDrawGridLines = false;
g.LineColor = color;
int ox = -1;
int oy = -1;
for (i = 0; i != BoundingBox.Width; i++)
{
int nx = x + i;
int ip = (i + ipa) & (mScopePointCount - 1);
int minvy = (int)(gridMult * (minV[ip] - gridMid));
int maxvy = (int)(gridMult * (maxV[ip] - gridMid));
if (minvy <= maxy)
{
if (minvy < minRangeLo || maxvy > minRangeHi)
{
/* we got a value outside min range, so we don't need to rescale later */
mReduceRange = false;
minRangeLo = -1000;
minRangeHi = 1000; /* avoid triggering this test again */
}
if (ox != -1)
{
if (minvy == oy && maxvy == oy)
{
continue;
}
g.DrawLine(ox, y - oy, nx, y - oy);
ox = oy = -1;
}
if (minvy == maxvy)
{
ox = nx;
oy = minvy;
continue;
}
g.DrawLine(nx, y - minvy, nx, y - maxvy);
}
} /* for (i=0...) */
if (ox != -1)
{
g.DrawLine(ox, y - oy, x + i, y - oy); /* Horizontal */
}
}