Description
When plotting a graph using DrawLines, if the curve crosses the same y coordinate multiple times, some unwanted horizontal lines are being rendered.
Steps to Reproduce
Here's code producing the issue displayed in the image below. Artifacts are particularly visible on the bottom right corner.
public static void DrawLinesTest()
{
int width = 1000;
int height = 500;
using (var image = new Image<Rgba32>(width, height))
{
image.Mutate(imageContext =>
{
imageContext.BackgroundColor(Rgba32.White);
int pointCount = 1234;
var line = Enumerable.Range(0, pointCount).Select(x => x * width / (float)pointCount).Select(x => new PointF(x, (0.5f + (float)Math.Sin(x / 3) / 2) * height)).ToArray();
imageContext.DrawLines(new Rgba32(255, 0, 0), 1, line);
});
using (var file = File.Create("DrawLinesTest.png"))
{
image.SaveAsPng(file);
}
}
}
System Configuration
- ImageSharp version: 1.0.0-beta0002
- Other ImageSharp packages and versions: Drawing version 1.0.0-beta0002
- Environment (Operating system, version and so on): VS2017, Windows 10
- .NET Framework version: .net Core 2.0 console application
- Additional information: Saving the image as bmp didn't change anything
Description
When plotting a graph using DrawLines, if the curve crosses the same y coordinate multiple times, some unwanted horizontal lines are being rendered.
Steps to Reproduce
Here's code producing the issue displayed in the image below. Artifacts are particularly visible on the bottom right corner.
System Configuration