/// <summary>
/// transfers the data from our segments to the vertices for display
/// </summary>
void CalculateVertices()
{
if (!_areVertsDirty)
{
return;
}
var center = new Vector3(Entity.Transform.Position, 0f);
var radVec = new Vector3(0, -RibbonRadius, 0);
// starting triangle, the head
_vertices[0].Position = center + radVec;
_vertices[0].Color = Color.Red;
_vertices[1].Position = center + radVec;
_vertices[1].Color = Color.Yellow;
_vertices[2].Position = center + radVec;
_vertices[2].Color = Color.Green;
var maxX = float.MinValue;
var minX = float.MaxValue;
var maxY = float.MinValue;
var minY = float.MaxValue;
var index = 3;
var segCount = 1;
foreach (var seg in _segments)
{
var ratio = 1 - (1 / (float)_ribbonLength * segCount);
seg.Radius = ratio * RibbonRadius;
ColorExt.Lerp(ref StartColor, ref EndColor, out _vertices[index].Color, 1 - ratio);
_vertices[index].Position = seg.TopPoint;
_vertices[index + 1].Position = seg.BottomPoint;
_vertices[index + 1].Color = _vertices[index].Color;
// update min/max for any visible verts
maxX = Mathf.MaxOf(maxX, _vertices[index].Position.X, _vertices[index + 1].Position.X);
minX = Mathf.MinOf(minX, _vertices[index].Position.X, _vertices[index + 1].Position.X);
maxY = Mathf.MaxOf(maxY, _vertices[index].Position.Y, _vertices[index + 1].Position.Y);
minY = Mathf.MinOf(minY, _vertices[index].Position.Y, _vertices[index + 1].Position.Y);
// increment counters
index += 2;
segCount++;
}
_bounds.X = minX;
_bounds.Y = minY;
_bounds.Width = maxX - minX;
_bounds.Height = maxY - minY;
_areVertsDirty = false;
}
// Default theme
static Theme()
{
DeveloperFont = Graphics.Instance.DevFont;
DefaultFont = Graphics.Instance.DevFontNarrow;
ApplicationNullColor = Color.Black;
PanelBackground = ColorExt.HexToColor("#14101d");
BackgroundColor = ColorExt.HexToColor("#07090F");
FaintBackgroundColor = Color.FromNonPremultiplied(BackgroundColor.R, BackgroundColor.G, BackgroundColor.B, 140);
ForegroundColor = ColorExt.HexToColor("#D8DBE2");
HighlightColor = ColorExt.HexToColor("#2176AE");
PrimaryThemeColor = ColorExt.HexToColor("#04F06A");
SecondaryThemeColor = ColorExt.HexToColor("#E56399");
ErrorThemeColor = ColorExt.HexToColor("#D8DBE2");
}
void CalculateVertices()
{
if (!_areVertsDirty || _points.Length < 2)
{
return;
}
_areVertsDirty = false;
_indices.Reset();
_vertices.Reset();
var maxX = float.MinValue;
var minX = float.MaxValue;
var maxY = float.MinValue;
var minY = float.MaxValue;
if (_useStartEndWidths)
{
_maxWidth = System.Math.Max(_startWidth, _endWidth);
}
// calculate line length first and simulataneously get our min/max points for the bounds
var lineLength = 0f;
var halfMaxWidth = _maxWidth * 0.5f;
_points.Buffer[0].LengthFromPreviousPoint = 0;
for (var i = 0; i < _points.Length - 1; i++)
{
var distance = Vector2.Distance(_points.Buffer[i].Position, _points.Buffer[i + 1].Position);
_points.Buffer[i + 1].LengthFromPreviousPoint = distance;
lineLength += distance;
maxX = Mathf.MaxOf(maxX, _points.Buffer[i].Position.X + halfMaxWidth,
_points.Buffer[i + 1].Position.X + halfMaxWidth);
minX = Mathf.MinOf(minX, _points.Buffer[i].Position.X - halfMaxWidth,
_points.Buffer[i + 1].Position.X - halfMaxWidth);
maxY = Mathf.MaxOf(maxY, _points.Buffer[i].Position.Y + halfMaxWidth,
_points.Buffer[i + 1].Position.Y + halfMaxWidth);
minY = Mathf.MinOf(minY, _points.Buffer[i].Position.Y - halfMaxWidth,
_points.Buffer[i + 1].Position.Y - halfMaxWidth);
}
_bounds.X = minX;
_bounds.Y = minY;
_bounds.Width = maxX - minX;
_bounds.Height = maxY - minY;
// special case: single segment
if (_points.Length == 2)
{
if (_useStartEndWidths)
{
_points.Buffer[0].Width = _startWidth;
_points.Buffer[1].Width = _endWidth;
}
if (_useStartEndColors)
{
_points.Buffer[0].Color = _startColor;
_points.Buffer[1].Color = _endColor;
}
_firstSegment.SetPoints(ref _points.Buffer[0], ref _points.Buffer[1]);
AddSingleSegmentLine(ref _firstSegment, _points.Buffer[1].Color);
return;
}
var distanceSoFar = 0f;
var fusedPoint = Vector2.Zero;
var vertIndex = 0;
var thirdPoint = new SegmentPoint();
for (var i = 0; i < _points.Length - 1; i++)
{
var firstPoint = _points.Buffer[i];
var secondPoint = _points.Buffer[i + 1];
var hasThirdPoint = _points.Length > i + 2;
if (hasThirdPoint)
{
thirdPoint = _points.Buffer[i + 2];
}
// we need the distance along the line of both the first and second points. distanceSoFar will always be for the furthest point
// which is the previous point before adding the current segment distance.
var firstPointDistance = distanceSoFar;
distanceSoFar += secondPoint.LengthFromPreviousPoint;
var firstPointRatio = firstPointDistance / lineLength;
var secondPointRatio = distanceSoFar / lineLength;
var thirdPointRatio = 0f;
if (hasThirdPoint)
{
thirdPointRatio = (distanceSoFar + thirdPoint.LengthFromPreviousPoint) / lineLength;
}
if (_useStartEndColors)
{
ColorExt.Lerp(ref _startColor, ref _endColor, out firstPoint.Color, firstPointRatio);
ColorExt.Lerp(ref _startColor, ref _endColor, out secondPoint.Color, secondPointRatio);
if (hasThirdPoint)
{
ColorExt.Lerp(ref _startColor, ref _endColor, out thirdPoint.Color, thirdPointRatio);
}
}
if (_useStartEndWidths)
{
firstPoint.Width = Mathf.Lerp(_startWidth, _endWidth, firstPointRatio);
secondPoint.Width = Mathf.Lerp(_startWidth, _endWidth, secondPointRatio);
if (hasThirdPoint)
{
thirdPoint.Width = Mathf.Lerp(_startWidth, _endWidth, thirdPointRatio);
}
}
if (i == 0)
{
_firstSegment.SetPoints(ref firstPoint, ref secondPoint);
_secondSegment.SetPoints(ref secondPoint, ref thirdPoint);
}
else
{
Utils.Swap(ref _firstSegment, ref _secondSegment);
if (hasThirdPoint)
{
_secondSegment.SetPoints(ref secondPoint, ref thirdPoint);
}
}
// dont recalculate the fusedPoint for the last segment since there will be no third point to work with
if (hasThirdPoint)
{
var shouldFuseBottom =
Vector2Ext.IsTriangleCCW(firstPoint.Position, secondPoint.Position, thirdPoint.Position);
_secondSegment.SetFusedData(shouldFuseBottom, ref _firstSegment);
}
// special care needs to be take with the first segment since it has a different vert count
if (i == 0)
{
AddFirstSegment(ref _firstSegment, ref _secondSegment, ref vertIndex);
}
else
{
AddSegment(ref _firstSegment, ref vertIndex);
}
_lastSegment.CloneFrom(ref _firstSegment);
}
}
