public static List <float[]> GetPoints(CoreSvg.Models.Path path)
{
var commands = GetPathCommands(path);
var result = new List <float[]>();
foreach (var command in commands)
{
var points = GetPoints(command, result);
result.AddRange(points);
}
return(result);
}
public static SvgMeshData GetMeshData(CoreSvg.Models.Path path, List <float[]> points, Style style, bool constrained = true)
{
var triangulation = points.Count > 4 ? (constrained ? GetConstrainedDelaunayTriangulation(points) : GetDelaunayIndexes(points)) : null;
var data = triangulation is null?GetVertices(points).ToList() : GetVertices(triangulation.Vertices.SelectMany(a => a).ToArray()).ToList();
var meshIndices = triangulation is null ? (data.Count == 3) ? new List <int> {
0, 1, 2
} : (data.Count == 4) ? new List <int> {
0, 1, 2, 0, 2, 3
} : new List <int> {
} : triangulation.Triangles;
if (style.LinearGradient != null)
{
var gradient1 = new float[] { (float)style.LinearGradient.X1, (float)style.LinearGradient.Y1, 0f };
var gradient2 = new float[] { (float)style.LinearGradient.X2, (float)style.LinearGradient.Y2, 0f };
var gradientTransform = StyleHelper.GetTransform(style.LinearGradient.GradientTransform);
var translate = gradientTransform.Translate.Add(style.Transform.Translate);
var scale = new float[] { style.Transform.Scale.X(), style.Transform.Scale.Y(), 0f };
gradient1 = gradient1.Add(new float[] { translate.X(), translate.Y(), 0f }).MultiplyComponents(scale);
gradient2 = gradient2.Add(new float[] { translate.X(), translate.Y(), 0f }).MultiplyComponents(scale);
data.ForEach(v =>
{
var current = new float[] { v.PosX, v.PosY, 0f };
gradient1.SegmentClosestPoint(gradient2, current, out var offset);
var stop = style.LinearGradient.Stops.FirstOrDefault(a => a.Offset == offset);
var color = Color.Black;
if (stop is null)
{
var stops = style.LinearGradient.Stops.OrderBy(a => Math.Abs(a.Offset - offset)).Take(2).ToList();
var stopStyle = StyleHelper.GetStyle(stops[0].Style, null, null);
var stopColor1 = Color.FromArgb((byte)(stopStyle.StopOpacity * 255), stopStyle.StopColor);
stopStyle = StyleHelper.GetStyle(stops[1].Style, null, null);
var stopColor2 = Color.FromArgb((byte)(stopStyle.StopOpacity * 255), stopStyle.StopColor);
var stopOffsetDif = stops[1].Offset - stops[0].Offset;
var stop1Offset = (offset - stops[0].Offset) / stopOffsetDif;
var stop2Offset = 1f - stop1Offset;
color = Color.FromArgb((byte)(stopColor1.A * stop1Offset) + (byte)(stopColor2.A * stop2Offset),
(byte)(stopColor1.R * stop1Offset) + (byte)(stopColor2.R * stop2Offset),
(byte)(stopColor1.G * stop1Offset) + (byte)(stopColor2.G * stop2Offset),
(byte)(stopColor1.B * stop1Offset) + (byte)(stopColor2.B * stop2Offset));
}
v.R = color.R / 255f;
v.G = color.G / 255f;
v.B = color.B / 255f;
v.A = color.A / 255f;
});
}
else
{
data.ForEach(v =>
{
v.R = style.Fill.R / 255f;
v.G = style.Fill.G / 255f;
v.B = style.Fill.B / 255f;
v.A = style.Fill.A / 255f;
});
}
return(new SvgMeshData()
{
Vertices = data,
Indices = meshIndices
});
}
