void draw_plot(RendererViewport r, Plot plot)
{
switch (plot.get_dimensions())
{
case 1:
{
set_2d_plot_window(r, plot);
draw_axes_2d(r, plot.get_axes());
// plot title
Vector2Pair _window2d = r.get_window2d();
Vector2Pair _window2d_fit = r.get_window2d_fit();
r.draw_text(
new Vector2((_window2d.v0.x() + _window2d.v1.x()) / 2.0,
(_window2d_fit.v1.y() + _window2d.v1.y()) / 2.0),
Vector2.vector2_10, plot.get_title(),
(int)Renderer.TextAlignMask.TextAlignCenter | (int)Renderer.TextAlignMask.TextAlignMiddle, 18,
r.get_style_color(Renderer.Style.StyleForeground));
// plot data
for (int i = 0; i < plot.get_plot_count(); i++)
{
PlotData d = plot.get_plot_data(i);
draw_plot_data_2d(r, (Set1d)d.get_set(), d);
}
break;
}
default:
throw new InvalidOperationException("Unsupported dimensions " + plot.get_dimensions());
}
}
void draw_plot_data_2d(RendererViewport r, Set1d data,
PlotData style)
{
// spline interpolated curve between points
Vector2Pair _window2d_fit = r.get_window2d_fit();
Vector2Pair _window2d = r.get_window2d();
Vector2 _2d_output_res = r.get_2d_output_res();
if ((style.get_style() & (int)PlotStyleMask.InterpolatePlot) != 0)
{
double x_step
= (_window2d.v1.x() - _window2d.v0.x()) / _2d_output_res.x();
Range xr = data.get_x_range(0);
double x_low = Math.Max(_window2d_fit.v0.x(), xr.first);
double x_high = Math.Min(_window2d_fit.v1.x(), xr.second);
double y1 = data.interpolate(x_low);
for (double x = x_low + x_step; x < x_high + x_step / 2; x += x_step)
{
double y2 = data.interpolate(x);
r.draw_segment(new Vector3Pair(new Vector3(x - x_step, y1, 0),
new Vector3(x, y2, 0)),
style.get_color());
y1 = y2;
}
}
// line plot
if ((style.get_style() & (int)PlotStyleMask.LinePlot) != 0)
{
Range p1 = new Range(data.get_x_value(0),
data.get_y_value(0));
for (int j = 1; j < data.get_count(); j++)
{
Range p2 = new Range(data.get_x_value(j),
data.get_y_value(j));
r.draw_segment(
new Vector3Pair(new Vector3(p1.first, p1.second, 0),
new Vector3(p2.first, p2.second, 0)),
style.get_color());
p1 = p2;
}
}
// draw cross tic for each point
if ((style.get_style() & (int)PlotStyleMask.PointPlot) != 0)
{
for (int j = 0; j < data.get_count(); j++)
{
Vector2 p = new Vector2(data.get_x_value(j), data.get_y_value(j));
r.draw_point(p, style.get_color(), Renderer.PointStyle.PointStyleCross);
}
}
// print value for each point
if ((style.get_style() & (int)PlotStyleMask.ValuePlot) != 0)
{
for (int j = 0; j < data.get_count(); j++)
{
int a;
// FIXME remove use of data pair
Range p = new Range(data.get_x_value(j),
data.get_y_value(j));
double prev = j > 0 ? data.get_y_value(j - 1) : p.second;
double next = j + 1 < data.get_count()
? data.get_y_value(j + 1)
: p.second;
if (p.second
> prev) // FIXME use derivative to find best text position
{
if (p.second > next)
{
a = (int)Renderer.TextAlignMask.TextAlignBottom |
(int)Renderer.TextAlignMask.TextAlignCenter;
}
else
{
a = (int)Renderer.TextAlignMask.TextAlignBottom |
(int)Renderer.TextAlignMask.TextAlignRight;
}
}
else
{
if (p.second > next)
{
a = (int)Renderer.TextAlignMask.TextAlignTop | (int)Renderer.TextAlignMask.TextAlignRight;
}
else
{
a = (int)Renderer.TextAlignMask.TextAlignBottom |
(int)Renderer.TextAlignMask.TextAlignLeft;
}
}
string s = string.Format("{0:F2}", p.second);
r.draw_text(new Vector2(p.first, p.second), Vector2.vector2_10,
s, a, 12, style.get_color());
}
}
}