public double GetSpotRate(double t)
{
if (Trait == YieldCurveTrait.SpotCurve)
{
return(_curveXInYears.GetValue(t) + Spread.GetValue(t));
}
var df = GetDf(t);
return(Compound.CalcRateFromDf(df, t));
}
public double GetForwardRate(double t0, double dt, Compound compound = Compound.Simple, IDayCount dayCount = null)
{
if (dt <= 0.0)
{
return(_curveXInYears.GetValue(t0) + Spread.GetValue(t0));
}
if (t0.IsAlmostZero() && dt.IsAlmostZero())
{
return(GetForwardRate(0, 0.0001, compound, dayCount));
}
var df = GetDf(t0 + dt) / GetDf(t0);
return(compound.CalcRateFromDf(df, dt));
}
private void Update(EvaluationContext context)
{
if (!(SourcePoints.GetValue(context) is StructuredList <Point> sourcePoints))
{
return;
}
if (sourcePoints.NumElements == 0)
{
sourcePoints.SetLength(0);
ResultList.Value = sourcePoints;
return;
}
var spread = Spread.GetValue(context);
var spreadMode = (SpreadModes)SpreadMode.GetValue(context);
var indexWithinSegment = 0;
var lineSegmentLength = 0f;
var totalLength = 0f;
var maxLength = float.NegativeInfinity;
var randomizeStart = RandomizeStart.GetValue(context);
var randomizeDuration = RandomizeDuration.GetValue(context);
// Measure...
segments.Clear();
for (var pointIndex = 0; pointIndex < sourcePoints.NumElements; pointIndex++)
{
if (float.IsNaN(sourcePoints.TypedElements[pointIndex].W))
{
var hasAtLeastTwoPoints = indexWithinSegment > 1;
if (hasAtLeastTwoPoints)
{
if (lineSegmentLength > maxLength)
{
maxLength = lineSegmentLength;
}
totalLength += lineSegmentLength;
segments.Add(new Segment
{
PointIndex = pointIndex - indexWithinSegment,
PointCount = indexWithinSegment,
AccumulatedLength = totalLength,
SegmentLength = lineSegmentLength
});
}
lineSegmentLength = 0;
indexWithinSegment = 0;
}
else
{
if (indexWithinSegment > 0)
{
lineSegmentLength += Vector3.Distance(sourcePoints.TypedElements[pointIndex - 1].Position,
sourcePoints.TypedElements[pointIndex].Position);
}
indexWithinSegment++;
}
}
if (totalLength < 0.0001f || segments.Count < 2)
{
Log.Warning("Stroke animation requires at least two segments with of some length");
return;
}
// Write offsets...
float dist = maxLength / (segments.Count - 1);
_random = new Random(42);
for (var segmentIndex = 0; segmentIndex < segments.Count; segmentIndex++)
{
var segmentOffset = ComputeOverlappingProgress(0, segmentIndex, segments.Count, spread);
var lengthProgressWithingSegment = 0f;
var segment = segments[segmentIndex];
// see https://www.figma.com/file/V5k13NMMIsnAnbWH651clI/Untitled?node-id=205%3A96
var stackedRange = TimeRange.FromStartAndDuration(segment.AccumulatedLength - segment.SegmentLength, segment.SegmentLength) * (1 / totalLength);
var anchor = segmentIndex * segment.SegmentLength / (segments.Count - 1);
var pGrid = segmentIndex * dist;
var packedRange = TimeRange.FromStartAndDuration(pGrid - anchor, segment.SegmentLength) * (1 / maxLength);
var range = TimeRange.Lerp(packedRange, stackedRange, spread);
if (Math.Abs(randomizeStart) > 0.0001f)
{
var randomStart = (float)_random.NextDouble() * (1 - range.Duration);
range.Start = MathUtils.Lerp(range.Start, randomStart, randomizeStart);
}
if (Math.Abs(randomizeDuration) > 0.0001f)
{
var randomDuration = (float)_random.NextDouble() * (1 - range.Start);
range.Duration = MathUtils.Lerp(range.Duration, randomDuration, randomizeDuration);
}
for (var pointIndexInSegment = 0; pointIndexInSegment < segment.PointCount; pointIndexInSegment++)
{
var pi = segment.PointIndex + pointIndexInSegment;
if (pointIndexInSegment > 0)
{
lengthProgressWithingSegment += Vector3.Distance(sourcePoints.TypedElements[pi - 1].Position,
sourcePoints.TypedElements[pi].Position);
}
var normalizedSegmentPosition = pointIndexInSegment / (segment.PointCount - 1);
float w = 0;
switch (spreadMode)
{
case SpreadModes.IgnoreStrokeLengths:
var f = lengthProgressWithingSegment / segment.SegmentLength.Clamp(0.001f, 999999f);
w = (f - segmentOffset) / (segments.Count + 1);
break;
case SpreadModes.UseStrokeLength:
w = MathUtils.Lerp(range.Start, range.End, normalizedSegmentPosition);
break;
case SpreadModes.Weird:
w = segmentOffset * 0.2f + pointIndexInSegment / segment.PointCount / 2;
break;
}
sourcePoints.TypedElements[pi].W = w;
}
}
StrokeCount.Value = segments.Count;
ResultList.Value = sourcePoints;
StrokeCount.DirtyFlag.Clear();
ResultList.DirtyFlag.Clear();
}
private void Update(EvaluationContext context)
{
var worldToClipSpace = Matrix.Multiply(context.WorldToCamera, context.CameraToClipSpace);
//Matrix worldToView = context.WorldToCamera * context.CameraProjection;
//var worldToClipSpace = context.WorldToCamera
//var viewToWorld = Matrix.Invert(worldToClipSpace);
var brightness = Brightness.GetValue(context);
var color = Color.GetValue(context);
var randomizeColor = RandomizeColor.GetValue(context);
var size = Size.GetValue(context);
var randomizeSize = RandomizeSize.GetValue(context);
var stretch = Stretch.GetValue(context);
var distanceFromLight = DistanceFromLight.GetValue(context);
var spread = Spread.GetValue(context);
var randomizeSpread = RandomizeSpread.GetValue(context);
var positionFactor = PositionFactor.GetValue(context);
var randomizePosition = RandomizePosition.GetValue(context);
var mixPointLightColor = MixPointLightColor.GetValue(context);
var referencedLightIndex = LightIndex.GetValue(context);
var innerFxZone = InnerFxZone.GetValue(context);
var edgeFxZone = EdgeFxZone.GetValue(context);
var zoneFxScale = FxZoneScale.GetValue(context);
var zoneFxBrightness = FxZoneBrightness.GetValue(context);
var matteBoxZone = MattBoxZone.GetValue(context);
var rand = new Random(RandomSeed.GetValue(context));
var fxZoneMode = (ZoneFxModes)FxZoneMode.GetValue(context);
var rotation = Rotation.GetValue(context);
var rotationSpread = RotationSpread.GetValue(context);
var rotateTowards = (Categories)RotateTowards.GetValue(context);
int startLightIndex = 0;
int endLightIndex = context.PointLights.Count;
_tempList.Clear();
if (brightness > 0.00001f)
{
if (referencedLightIndex >= 0)
{
startLightIndex = referencedLightIndex;
endLightIndex = referencedLightIndex + 1;
}
var aspectRatio = (float)context.RequestedResolution.Width / (float)context.RequestedResolution.Height;
for (int lightIndex = startLightIndex; lightIndex < endLightIndex; lightIndex++)
{
var pointLight = context.PointLights.GetPointLight(lightIndex);
var lightPosDx = pointLight.Position.ToSharpDxVector4(1);
var posInViewDx = SharpDX.Vector4.Transform(lightPosDx, worldToClipSpace);
posInViewDx /= posInViewDx.W;
// Ignore light sources behind
var hideFactor = posInViewDx.Z < 0 ? 0 : 1;
posInViewDx /= posInViewDx.W;
var lightPosInView2D = new Vector2(posInViewDx.X, posInViewDx.Y);
var count = SpriteCount.GetValue(context).Clamp(0, 1000);
if (count != _sprites.NumElements)
{
_sprites = new StructuredList <Sprite>(count);
}
// Render Planes
for (var i = 0; i < count; ++i)
{
var f = count <= 1 ? 0 : ((float)i / (count - 1) - 0.5f);
var positionOnLine = (float)((-distanceFromLight
+ f * spread * 2
+ randomizeSpread * (rand.NextDouble() - 0.5) + 1));
Vector2 objectScreenPos = lightPosInView2D * positionOnLine * positionFactor + (new Vector2(1, 1) - positionFactor) * lightPosInView2D;
objectScreenPos += new Vector2((float)(randomizePosition.X * (rand.NextDouble() - 0.5)),
(float)(randomizePosition.Y * (rand.NextDouble() - 0.5)));
var sizeWithRandom = size * (float)(1.0 + randomizeSize * (rand.NextDouble() - 0.5)) / 0.2f;
var colorWithLight = new Vector4((color.X + randomizeColor.X * (float)(rand.NextDouble() - 0.5) * 4) * MathUtils.Lerp(1f, pointLight.Color.X, mixPointLightColor),
(color.Y + randomizeColor.Y * (float)(rand.NextDouble() - 0.5) * 4) * MathUtils.Lerp(1f, pointLight.Color.Y, mixPointLightColor),
(color.Z + randomizeColor.Z * (float)(rand.NextDouble() - 0.5) * 4) * MathUtils.Lerp(1f, pointLight.Color.Z, mixPointLightColor),
color.W * (1 - randomizeColor.W * (float)(rand.NextDouble() * 2)));
var spriteColor = Vector4.Clamp(colorWithLight, Vector4.Zero, new Vector4(100, 100, 100, 1));
var triggerPosition = fxZoneMode == ZoneFxModes.Lights
? lightPosInView2D
: objectScreenPos;
var d = GetDistanceToEdge(triggerPosition);
var cInnerZone = MathUtils.SmootherStep(innerFxZone.Y, innerFxZone.X, 1 - d);
var cEdgeZone = MathUtils.SmootherStep(edgeFxZone.X, edgeFxZone.Y, 1 - d);
var cMatteBox = MathUtils.SmootherStep(matteBoxZone.Y, matteBoxZone.X, 1 - d);
var totalTriggerAmount = (cInnerZone + cEdgeZone) * cMatteBox;
sizeWithRandom *= (1 + zoneFxScale * totalTriggerAmount).Clamp(0, 100);
var brightnessEffect = (zoneFxBrightness * totalTriggerAmount).Clamp(0, 100);
spriteColor.X += brightnessEffect;
spriteColor.Y += brightnessEffect;
spriteColor.Z += brightnessEffect;
spriteColor.W = ((spriteColor.W + brightnessEffect)).Clamp(0, 1);
spriteColor.W *= cMatteBox * pointLight.Color.W;
// This might actually be a good idea. Maybe we should do this later..
// Fade with incoming alpha from FlatShaders and Materials
//color.W *= materialAlpha;
float spriteRotation = rotation;
switch (rotateTowards)
{
case Categories.Object:
break;
case Categories.Light:
spriteRotation -=
(float)(Math.Atan2((objectScreenPos.X - lightPosInView2D.X) * aspectRatio, objectScreenPos.Y - lightPosInView2D.Y) +
MathF.PI) * (180 / MathF.PI);
break;
case Categories.ScreenCenter:
spriteRotation -= (float)(Math.Atan2(objectScreenPos.X, objectScreenPos.Y) + MathF.PI) * 180f / MathF.PI;
break;
default:
throw new ArgumentOutOfRangeException();
}
// // Transforom UV to pick correct texture cell
// if (TextureCellsRows == 0)
// TextureCellsRows = 1;
//
// if (TextureCellsColumns == 0)
// TextureCellsColumns = 1;
// int row = (int)(Math.Floor(i / TextureCellsColumns) % TextureCellsRows);
// int column = (int)(i % TextureCellsRows);
//
// var translationUV = new Vector3(1 / TextureCellsColumns * column, 1 / TextureCellsRows * row, 0);
// var rotationUV = new Quaternion();
// var scaleUV = new Vector3(1 / TextureCellsColumns, 1 / TextureCellsRows, 0);
// var pivotUV = new Vector3(0, 0, 0);
//
// var transformUV = Matrix.Transformation(pivotUV, new Quaternion(), scaleUV, pivotUV, rotationUV, translationUV);
// var prevTransformUV = context.TextureMatrix;
// context.TextureMatrix = transformUV * prevTransformUV;
spriteColor.W *= brightness;
_tempList.Add(new Sprite
{
PosInClipSpace = objectScreenPos,
Size = sizeWithRandom * stretch * hideFactor,
Color = spriteColor,
RotationDeg = spriteRotation + f * rotationSpread * 180,
UvMin = Vector2.Zero,
UvMax = Vector2.One,
});
}
}
}
// Copy to structured array
if (_tempList.Count != _sprites.NumElements)
{
_sprites = new StructuredList <Sprite>(_tempList.Count);
}
for (var spriteIndex = 0; spriteIndex < _tempList.Count; spriteIndex++)
{
_sprites.TypedElements[spriteIndex] = _tempList[spriteIndex];
}
OutBuffer.Value = _sprites;
}
