/// <summary>
/// load a volume from the given raw data file and generates an OpenGL 3D texture from it
/// </summary>
/// <returns></returns>
public static Texture Load()
{
var bytes = new byte[XDIM * YDIM * ZDIM];
// read the volume data file
using (var file = new System.IO.FileStream(volume_file, System.IO.FileMode.Open))
{
file.Read(bytes, 0, bytes.Length);
}
// generate OpenGL texture
var dataProvider = new ArrayDataProvider <byte>(bytes);
var storage = new TexImage3D(TexImage3D.Target.Texture3D, GL.GL_RED, 1, 0, XDIM, YDIM, ZDIM, GL.GL_RED, GL.GL_UNSIGNED_BYTE, dataProvider);
var texture = new Texture(
TextureTarget.Texture3D, storage, new MipmapBuilder(),
new TexParameteri(TexParameter.PropertyName.TextureWrapR, (int)GL.GL_CLAMP),
new TexParameteri(TexParameter.PropertyName.TextureWrapS, (int)GL.GL_CLAMP),
new TexParameteri(TexParameter.PropertyName.TextureWrapT, (int)GL.GL_CLAMP),
new TexParameteri(TexParameter.PropertyName.TextureMinFilter, (int)GL.GL_LINEAR_MIPMAP_LINEAR),
new TexParameteri(TexParameter.PropertyName.TextureMagFilter, (int)GL.GL_LINEAR),
new TexParameteri(TexParameter.PropertyName.TextrueBaseLevel, 0),
new TexParameteri(TexParameter.PropertyName.TextureMaxLevel, 4));
texture.Initialize();
return(texture);
}
/// <summary>
/// load a volume from the given raw data file and generates an OpenGL 3D texture from it
/// </summary>
/// <returns></returns>
public static Texture Load(Bitmap image)
{
var bytes = new byte[length * length * length];
if (image.Width != length || image.Height != length)
{
image = (Bitmap)image.GetThumbnailImage(length, length, null, IntPtr.Zero);
}
image.RotateFlip(RotateFlipType.Rotate180FlipX);
FillByteArray(bytes, image);
// generate OpenGL texture
var dataProvider = new ArrayDataProvider <byte>(bytes);
var storage = new TexImage3D(TexImage3D.Target.Texture3D, GL.GL_RED, length, length, length, GL.GL_RED, GL.GL_UNSIGNED_BYTE, dataProvider);
var texture = new Texture(storage, new MipmapBuilder(),
new TexParameteri(TexParameter.PropertyName.TextureWrapR, (int)GL.GL_CLAMP),
new TexParameteri(TexParameter.PropertyName.TextureWrapS, (int)GL.GL_CLAMP),
new TexParameteri(TexParameter.PropertyName.TextureWrapT, (int)GL.GL_CLAMP),
new TexParameteri(TexParameter.PropertyName.TextureMinFilter, (int)GL.GL_LINEAR_MIPMAP_LINEAR),
new TexParameteri(TexParameter.PropertyName.TextureMagFilter, (int)GL.GL_LINEAR),
new TexParameteri(TexParameter.PropertyName.TextrueBaseLevel, 0),
new TexParameteri(TexParameter.PropertyName.TextureMaxLevel, 4));
texture.Initialize();
return(texture);
}
