private void GenerateIsideCache()
{
int width = (int)Round(polygonBounds.Width() / unitsPerPixel);
int height = (int)Round(polygonBounds.Height() / unitsPerPixel);
DistanceFromOutside = new ImageBuffer(width + 4, height + 4, 8, new blender_gray(1));
// Set the transform to image space
polygonsToImageTransform = Affine.NewIdentity();
// move it to 0, 0
polygonsToImageTransform *= Affine.NewTranslation(-polygonBounds.minX, -polygonBounds.minY);
// scale to fit cache
polygonsToImageTransform *= Affine.NewScaling(width / (double)polygonBounds.Width(), height / (double)polygonBounds.Height());
// and move it in 2 pixels
polygonsToImageTransform *= Affine.NewTranslation(2, 2);
// and render the polygon to the image
DistanceFromOutside.NewGraphics2D().Render(new VertexSourceApplyTransform(CreatePathStorage(Polygons), polygonsToImageTransform), Color.White);
// Now lets create an image that we can use to move points inside the outline
// First create an image that is fully set on all color values of the original image
DistanceFromOutside.DoThreshold(1);
//var image32 = new ImageBuffer(InsetMap.Width, InsetMap.Height);
//image32.NewGraphics2D().Render(InsetMap, 0, 0);
//ImageTgaIO.Save(image32, "c:\\temp\\before.tga");
CalculateDistance(DistanceFromOutside);
//image32.NewGraphics2D().Render(InsetMap, 0, 0);
//ImageTgaIO.Save(image32, "c:\\temp\\test.tga");
}
private void GenerateIsideCache()
{
int width = (int)Round(polygonBounds.Width() / unitsPerPixel);
int height = (int)Round(polygonBounds.Height() / unitsPerPixel);
InsideCache = new ImageBuffer(width + 4, height + 4, 8, new blender_gray(1));
// Set the transform to image space
polygonsToImageTransform = Affine.NewIdentity();
// move it to 0, 0
polygonsToImageTransform *= Affine.NewTranslation(-polygonBounds.minX, -polygonBounds.minY);
// scale to fit cache
polygonsToImageTransform *= Affine.NewScaling(width / (double)polygonBounds.Width(), height / (double)polygonBounds.Height());
// and move it in 2 pixels
polygonsToImageTransform *= Affine.NewTranslation(2, 2);
// and render the polygon to the image
InsideCache.NewGraphics2D().Render(new VertexSourceApplyTransform(CreatePathStorage(Polygons), polygonsToImageTransform), Color.White);
// Now lets create an image that we can use to move points inside the outline
// First create an image that is fully set on all color values of the original image
InsetMap = new ImageBuffer(InsideCache);
InsetMap.DoThreshold(1);
// Then erode the image multiple times to get the a map of desired insets
int count = 8;
int step = 255 / count;
ImageBuffer last = InsetMap;
for (int i = 0; i < count; i++)
{
var erode = new ImageBuffer(last);
erode.DoErode3x3Binary(255);
Paint(InsetMap, erode, (i + 1) * step);
last = erode;
}
}
