public void TestClipPolygon()
{
Clipper2D clipper2d = new Clipper2D();
List <Vector2> clipWindow = new List <Vector2>()
{
new Vector2(0, 0),
new Vector2(10, 0),
new Vector2(10, 10),
new Vector2(0, 10)
};
List <Vector2> subjectPolygon = new List <Vector2>()
{
//new Vector2(5, 5),
//new Vector2(20, 20),
//new Vector2(5, 20)
new Vector2(5, 5),
new Vector2(20, 5),
new Vector2(20, 20),
new Vector2(5, 20)
};
List <Vector2> clipResult = new List <Vector2>(100);
clipper2d.Clip(clipWindow, subjectPolygon, clipResult);
int i = 0;
foreach (Vector2 vector2 in clipResult)
{
Console.WriteLine($"{i}: {vector2}");
i++;
}
}
private static unsafe void ConvertItemSurface(ISurface surface, out byte[] rawdata)
{
if (surface.Stride / surface.Width != 2)
throw new NotImplementedException();
var bitmap = surface.GetSurface();// as BitmapSurface;
var imrect = bitmap.GetImageRect();
var imavrx = bitmap.Width / 2;
var imlenx = Math.Min(Math.Max(imavrx - imrect.X1, imrect.X2 + 1 - imavrx), imavrx);
imrect = new Clipper2D((short)(imavrx - imlenx), imrect.Y1, (short)(imavrx + imlenx - 1), (short)(bitmap.Height - 1));
var data = new BinaryWriter(new MemoryStream());
data.Write((uint)1234); // header
data.Write((ushort)imrect.Width);
data.Write((ushort)imrect.Height);
var lookup = (int)data.BaseStream.Position;
for (var y = 0; y < imrect.Height; ++y)// fill lookup
data.Write((ushort)0);
lock (surface) {
uint delta = surface.Stride >> 1;
ushort* line = surface.ImageWordPtr + imrect.Y1 * delta;
for (int y = 0; y < imrect.Height; ++y, line += delta) {
data.BaseStream.Seek(lookup + (y << 1), SeekOrigin.Begin);
var lineoffs = ((data.BaseStream.Length - lookup) >> 1) - imrect.Height;
if (lineoffs > 0xFFFF)
throw new ClassicFactoryException();
data.Write( (ushort)lineoffs );
data.BaseStream.Seek(0, SeekOrigin.End);
ushort* cur = line + imrect.X1;
int x = 0, j = 0, i = 0;
while (i < imrect.Width) {
for (i = x; i < imrect.Width; ++i) {
//first pixel set
if (cur[i] != 0)
break;
}
if (i < imrect.Width) {
for (j = (i + 1); j < imrect.Width; ++j) {
//next non set pixel
// if (cur[j] == 0)
if (cur[j] == 0 && (j + 1 == imrect.Width || cur[j + 1] == 0))
break;
}
data.Write((ushort)(i - x)); //xoffset
data.Write((ushort)(j - i)); //run
for (int p = i; p < j; ++p)
//data.Write((ushort)(cur[p] ^ 0x8000);
data.Write((ushort)(cur[p] > 0 ? (cur[p] ^ 0x8000) : cur[p]));
x = j;
}
}
data.Write((ushort)0); //xOffset
data.Write((ushort)0); //Run
}
}
data.Flush();
rawdata = (data.BaseStream as MemoryStream).ToArray();
data.Close();
}
private static unsafe void ConvertLandSurface(ISurface surface, out byte[] rawdata)
{
if (surface.Stride / surface.Width != 2)
throw new NotImplementedException();
var bitmap = surface.GetSurface();// as BitmapSurface;
var imrect = bitmap.GetImageRect();
var imavrx = bitmap.Width / 2;
var imlenx = Math.Min(Math.Max(imavrx - imrect.X1, imrect.X2 + 1 - imavrx), imavrx);
imrect = new Clipper2D((short)(imavrx - imlenx), imrect.Y1, (short)(imavrx + imlenx - 1), (short)(bitmap.Height - 1));
if (imrect.Width != 44 || imrect.Height != 44) {
imrect = new Clipper2D((short)0, (short)0, (ushort)bitmap.Width, (ushort)bitmap.Height);
if (imrect.Width != 44 || imrect.Height != 44)
throw new ClassicFactoryException();
}
rawdata = new byte[0x07E8];
lock (surface) {
uint delta = surface.Stride >> 1;
ushort* line1 = surface.ImageWordPtr + imrect.Y1 * delta + imrect.X1;
ushort* line2 = surface.ImageWordPtr + imrect.Y2 * delta + imrect.X1;
fixed (byte* _data = &rawdata[0]) {
var data = (uint*)_data;
//data[0] = 0x00000000; // header
var i1 = 0;
var i2 = 505;
for (var y = 0; y < 22; ++y, line1 += delta, line2 -= delta) {
var cur1 = (uint*)(line1 + 21 - y);
var cur2 = (uint*)(line2 + 21 + y);
for (var x = 0; x <= y; ++x, ++i1, --i2, ++cur1, --cur2) {
data[i1] = *cur1 ^ 0x80008000;
data[i2] = *cur2 ^ 0x80008000;
}
}
}
}
}