/// <summary>
/// Draws the curve using the provided color.
/// </summary>
/// <param name="curve">Curve to draw within the currently set range. </param>
/// <param name="color">Color to draw the curve with.</param>
private void DrawCurve(EdAnimationCurve curve, Color color)
{
float range = GetRange();
float lengthPerPixel = range / drawableWidth;
KeyFrame[] keyframes = curve.KeyFrames;
if (keyframes.Length <= 0)
return;
// Draw start line
{
float curveStart = MathEx.Clamp(keyframes[0].time, 0.0f, range);
float curveValue = curve.Evaluate(0.0f, false);
Vector2I start = CurveToPixelSpace(new Vector2(0.0f, curveValue));
start.x -= GUIGraphTime.PADDING;
Vector2I end = CurveToPixelSpace(new Vector2(curveStart, curveValue));
canvas.DrawLine(start, end, COLOR_MID_GRAY);
}
List<Vector2I> linePoints = new List<Vector2I>();
// Draw in between keyframes
for (int i = 0; i < keyframes.Length - 1; i++)
{
float start = MathEx.Clamp(keyframes[i].time, 0.0f, range);
float end = MathEx.Clamp(keyframes[i + 1].time, 0.0f, range);
bool isStep = keyframes[i].outTangent == float.PositiveInfinity ||
keyframes[i + 1].inTangent == float.PositiveInfinity;
// If step tangent, draw the required lines without sampling, as the sampling will miss the step
if (isStep)
{
float startValue = curve.Evaluate(start, false);
float endValue = curve.Evaluate(end, false);
linePoints.Add(CurveToPixelSpace(new Vector2(start, startValue)));
linePoints.Add(CurveToPixelSpace(new Vector2(end, startValue)));
linePoints.Add(CurveToPixelSpace(new Vector2(end, endValue)));
}
else // Draw normally
{
float timeIncrement = LINE_SPLIT_WIDTH*lengthPerPixel;
int startPixel = (int)(start / lengthPerPixel);
int endPixel = (int)(end / lengthPerPixel);
int numSplits;
if (startPixel != endPixel)
{
float fNumSplits = (end - start) / timeIncrement;
numSplits = MathEx.CeilToInt(fNumSplits);
timeIncrement = (end - start)/numSplits;
}
else
{
numSplits = 1;
timeIncrement = 0.0f;
}
for (int j = 0; j < numSplits; j++)
{
float t = Math.Min(start + j * timeIncrement, end);
float value = curve.Evaluate(t, false);
linePoints.Add(CurveToPixelSpace(new Vector2(t, value)));
}
}
}
canvas.DrawPolyLine(linePoints.ToArray(), color);
// Draw end line
{
float curveEnd = MathEx.Clamp(keyframes[keyframes.Length - 1].time, 0.0f, range);
float curveValue = curve.Evaluate(range, false);
Vector2I start = CurveToPixelSpace(new Vector2(curveEnd, curveValue));
Vector2I end = new Vector2I(width, start.y);
canvas.DrawLine(start, end, COLOR_MID_GRAY);
}
}
public CurveDrawInfo(EdAnimationCurve curve, Color color)
{
this.curve = curve;
this.color = color;
}
