private void DrawCurveSections(Graphics g, Pen pen, EditCurve curve,
double t0, double t1, double step)
{
Vector2[] p = new Vector2[2] {
new Vector2(), new Vector2()
};
int pIdx = 0;
p[pIdx] =
curveView.ToPixelCoordinate((float)t0, curve.Evaluate((float)t0));
for (double t = t0; t < t1;)
{
double nextT = t + step;
t = nextT;
pIdx = (pIdx + 1) & 1;
p[pIdx] =
curveView.ToPixelCoordinate((float)t, curve.Evaluate((float)t));
DrawLine(g, pen, p[0], p[1]);
t = nextT;
}
}
private void DrawCurveSections(Graphics g, Pen pen, EditCurve curve,
double t0, double t1, double step)
{
Vector2[] p = new Vector2[2] { new Vector2(), new Vector2() };
int pIdx = 0;
p[pIdx] =
curveView.ToPixelCoordinate((float)t0, curve.Evaluate((float)t0));
for (double t = t0; t < t1; )
{
double nextT = t + step;
t = nextT;
pIdx = (pIdx + 1) & 1;
p[pIdx] =
curveView.ToPixelCoordinate((float)t, curve.Evaluate((float)t));
DrawLine(g, pen, p[0], p[1]);
t = nextT;
}
}
/// <summary>
/// Draw actual part of curve.
/// </summary>
/// <param name="g"></param>
/// <param name="pen"></param>
/// <param name="curve"></param>
/// <param name="t0"></param>
/// <param name="t1"></param>
/// <param name="step"></param>
private void DrawCurve(Graphics g, Pen pen, EditCurve curve,
double t0, double t1, double step)
{
Vector2[] p = new Vector2[2] { new Vector2(), new Vector2() };
// Search key and next key that includes t0 position.
int keyIndex = 0;
EditCurveKey key = null, nextKey = null;
for (; keyIndex < curve.Keys.Count; ++keyIndex)
{
key = nextKey; nextKey = curve.Keys[keyIndex];
if (nextKey.Position > t0) break;
}
int pIdx = 0;
p[pIdx] = curveView.ToPixelCoordinate((float)t0, curve.Evaluate((float)t0));
for (double t = t0; t < t1;)
{
double nextT = t1 + step;
if (nextKey != null)
nextT = Math.Min(t1, nextKey.Position);
// Draw current key and next key section.
if (key.Continuity == CurveContinuity.Smooth)
{
while (t < nextT)
{
// If this line crosses next key position, draw line from
// current position to next key position.
t = ( t < nextT && t + step > nextT )? nextT: t + step;
pIdx = (pIdx + 1) & 1;
p[pIdx] = curveView.ToPixelCoordinate(
(float)t, curve.Evaluate((float)t));
DrawLine(g, pen, p[0], p[1]);
}
}
else
{
// Step case,
// Draw, horizontal line.
pIdx = (pIdx + 1) & 1;
p[pIdx] = curveView.ToPixelCoordinate(nextKey.Position, key.Value);
DrawLine(g, pen, p[0], p[1]);
// Draw vertical line.
pIdx = (pIdx + 1) & 1;
p[pIdx] = curveView.ToPixelCoordinate(
nextKey.Position, nextKey.Value);
DrawLine(g, pen, p[0], p[1]);
t = nextT;
}
// Advance to next key.
key = nextKey;
nextKey = (++keyIndex < curve.Keys.Count) ? curve.Keys[keyIndex] : null;
}
}
/// <summary>
/// Draw actual part of curve.
/// </summary>
/// <param name="g"></param>
/// <param name="pen"></param>
/// <param name="curve"></param>
/// <param name="t0"></param>
/// <param name="t1"></param>
/// <param name="step"></param>
private void DrawCurve(Graphics g, Pen pen, EditCurve curve,
double t0, double t1, double step)
{
Vector2[] p = new Vector2[2] {
new Vector2(), new Vector2()
};
// Search key and next key that includes t0 position.
int keyIndex = 0;
EditCurveKey key = null, nextKey = null;
for (; keyIndex < curve.Keys.Count; ++keyIndex)
{
key = nextKey; nextKey = curve.Keys[keyIndex];
if (nextKey.Position > t0)
{
break;
}
}
int pIdx = 0;
p[pIdx] = curveView.ToPixelCoordinate((float)t0, curve.Evaluate((float)t0));
for (double t = t0; t < t1;)
{
double nextT = t1 + step;
if (nextKey != null)
{
nextT = Math.Min(t1, nextKey.Position);
}
// Draw current key and next key section.
if (key.Continuity == CurveContinuity.Smooth)
{
while (t < nextT)
{
// If this line crosses next key position, draw line from
// current position to next key position.
t = (t <nextT && t + step> nextT)? nextT: t + step;
pIdx = (pIdx + 1) & 1;
p[pIdx] = curveView.ToPixelCoordinate(
(float)t, curve.Evaluate((float)t));
DrawLine(g, pen, p[0], p[1]);
}
}
else
{
// Step case,
// Draw, horizontal line.
pIdx = (pIdx + 1) & 1;
p[pIdx] = curveView.ToPixelCoordinate(nextKey.Position, key.Value);
DrawLine(g, pen, p[0], p[1]);
// Draw vertical line.
pIdx = (pIdx + 1) & 1;
p[pIdx] = curveView.ToPixelCoordinate(
nextKey.Position, nextKey.Value);
DrawLine(g, pen, p[0], p[1]);
t = nextT;
}
// Advance to next key.
key = nextKey;
nextKey = (++keyIndex < curve.Keys.Count) ? curve.Keys[keyIndex] : null;
}
}
