public Vec3D Cross(Vec3D v1)
{
return new Vec3D(Y * v1.Z - Z * v1.Y, Z * v1.X - X * v1.Z, X * v1.Y - Y * v1.Z);
}
public double Dot(Vec3D v1)
{
return v1.X * X + v1.Y * Y + v1.Z * Z;
}
public static double Dot(Vec3D v1, Vec3D v2)
{
return v1.X * v2.X + v1.Y * v2.Y + v1.Z * v2.Z;
}
public static Vec3D Cross(Vec3D v1, Vec3D v2)
{
return new Vec3D(v1.Y * v2.Z - v1.Z * v2.Y, v1.Z * v2.X - v1.X * v2.Z, v1.X * v2.Y - v1.Y * v2.Z);
}
private void Shadow_Delegate()
{
try
{
Bitmap bm = FastPixel.GetBitmap((BitmapSource)image.Source);
FastPixel fp = new FastPixel(bm);
width = fp.Width;
height = fp.Height;
vectors = new Vec3D[width, height];
Color c;
for (int i = 0; i < width; i++)
{
for (int j = 0; j < height; j++)
{
c = fp.GetPixel(i, j);
vectors[i, j] = new Vec3D(c.R - 128f, c.G - 128f, c.B - 128f);
vectors[i, j].Normalize();
}
}
fp.Unlock(false);
}
catch (Exception ex)
{
Utilities.OnError(Utilities.GetCurrentMethod(), ex);
}
}
public void Update(double x, double y, double z, string texture, double ambient, double intensity)
{
if (!bValid) return;
try
{
if (this.texture != texture)
{
this.texture = texture;
Type ImageListType = typeof(ImageList);
Dictionary<string, BitmapSource> _savedImages;
BitmapSource img;
_savedImages = (Dictionary<string, BitmapSource>)ImageListType.GetField("_savedImages", BindingFlags.NonPublic | BindingFlags.Static | BindingFlags.IgnoreCase).GetValue(null);
if (_savedImages.TryGetValue(texture, out img))
{
bTexture = FastPixel.GetBitmap(img);
if (width != bTexture.Width || height != bTexture.Height) bTexture = null;
if (bSaveTexture && null != bTexture)
{
if (null != fpTexture) fpTexture.Unlock(false);
fpTexture = new FastPixel(bTexture);
}
}
else
{
bTexture = null;
}
}
double scale;
byte rgb;
Color c;
Vec3D source = new Vec3D(x, -y, z);
source.Normalize();
if (!bSaveTexture && null != bTexture)
{
fpTexture = new FastPixel(bTexture);
}
for (int i = 0; i < width; i++)
{
for (int j = 0; j < height; j++)
{
scale = Vec3D.Dot(source, vectors[i, j]);
if (null != bTexture)
{
scale = ambient + (intensity - ambient) * System.Math.Max(0, scale);
c = fpTexture.GetPixel(i, j);
fpNormal.SetPixel(i, j, Color.FromArgb(c.A, LDImage.range(c.R * scale), LDImage.range(c.G * scale), LDImage.range(c.B * scale)));
}
else
{
scale = 0.5 * (1.0 + scale);
rgb = LDImage.range(255 * scale);
fpNormal.SetPixel(i, j, Color.FromArgb(255, rgb, rgb, rgb));
}
}
}
fpNormal.Update();
if (!bSaveTexture && null != bTexture) fpTexture.Unlock(false);
FastThread.Invoke(Update_Delegate);
}
catch (Exception ex)
{
Utilities.OnError(Utilities.GetCurrentMethod(), ex);
}
}
/// <summary>
/// Create a normal map image from a height map. The height is given by the brightness of each pixel.
/// </summary>
/// <param name="image">The height map ImageList image.</param>
/// <param name="scale">A scale factor for the elevation (default 1).</param>
/// <returns>A new ImageList image with the resulting normal map.</returns>
public static Primitive HeightMap2NormalMap(Primitive image, Primitive scale)
{
lock (LockingVar)
{
Type ImageListType = typeof(ImageList);
Type GraphicsWindowType = typeof(GraphicsWindow);
Type ShapesType = typeof(Shapes);
string normalMap = "";
BitmapSource img;
try
{
_savedImages = (Dictionary<string, BitmapSource>)ImageListType.GetField("_savedImages", BindingFlags.NonPublic | BindingFlags.Static | BindingFlags.IgnoreCase).GetValue(null);
if (!_savedImages.TryGetValue(image, out img)) return normalMap;
MethodInfo method = ShapesType.GetMethod("GenerateNewName", BindingFlags.NonPublic | BindingFlags.Static | BindingFlags.IgnoreCase);
normalMap = method.Invoke(null, new object[] { "ImageList" }).ToString();
if (scale == "") scale = 1;
Bitmap bm = FastPixel.GetBitmap(img);
FastPixel fp = new FastPixel(bm);
Vec3D n = new Vec3D();
double[,] height = new double[fp.Width, fp.Height];
double maxheight = 0;
double minheight = 1;
for (int i = 0; i < fp.Width; i++)
{
for (int j = 0; j < fp.Height; j++)
{
height[i, j] = fp.GetPixel(i, j).GetBrightness();
maxheight = System.Math.Max(maxheight, height[i, j]);
minheight = System.Math.Min(minheight, height[i, j]);
}
}
if (maxheight > minheight)
{
for (int i = 0; i < fp.Width; i++)
{
for (int j = 0; j < fp.Height; j++)
{
height[i, j] = (height[i, j] - minheight) / (maxheight - minheight);
}
}
}
for (int i = 0; i < fp.Width; i++)
{
for (int j = 0; j < fp.Height; j++)
{
int im = i - 1;
int ip = i + 1;
int jm = j - 1;
int jp = j + 1;
n.Z = 1;
if (im < 0)
{
im = 0;
n.Z = 0.5f;
}
else if (ip >= fp.Width)
{
ip = fp.Width - 1;
n.Z = 0.5f;
}
if (jm < 0)
{
jm = 0;
n.Z = 0.5f;
}
else if (jp >= fp.Height)
{
jp = fp.Height - 1;
n.Z = 0.5f;
}
n.X = scale * -(height[ip, jm] - height[im, jm] + 2 * (height[ip, j] - height[im, j]) + height[ip, jp] - height[im, jp]);
n.Y = scale * (height[im, jp] - height[im, jm] + 2 * (height[i, jp] - height[i, jm]) + height[ip, jp] - height[ip, jm]);
n.Normalize();
fp.SetPixel(i, j, Color.FromArgb(255, range((1 + n.X) * 128), range((1 + n.Y) * 128), range((1 + n.Z) * 128)));
}
}
fp.Unlock(true);
FastThread.SaveBitmap(normalMap, bm);
}
catch (Exception ex)
{
Utilities.OnError(Utilities.GetCurrentMethod(), ex);
}
return normalMap;
}
}
