public override vect3d sample(vect3d pos)
{
// find modulo value (texture wrapping)
vect2d p = new vect2d((pos.x % 1) * bmp.Width, ((1 - pos.y) % 1) * bmp.Height);
if (p.x < 0)
p.x += bmp.Width;
if (p.y < 0)
p.y += bmp.Height;
// get color out of bmp
int i = (int)p.x, j = (int)p.y;
int ip = (i + 1) % bmp.Width, jp = (j + 1) % bmp.Height;
double dx = p.x - i, dy = p.y - j;
Color color;
color = bmp.GetPixel(i, j);
vect3d c00 = new vect3d(color.R, color.G, color.B);
color = bmp.GetPixel(i, jp);
vect3d c01 = new vect3d(color.R, color.G, color.B);
color = bmp.GetPixel(ip, j);
vect3d c10 = new vect3d(color.R, color.G, color.B);
color = bmp.GetPixel(ip, jp);
vect3d c11 = new vect3d(color.R, color.G, color.B);
// combine samples with lerp
return ((1 - dx) * (1 - dy) * c00 + (1 - dx) * dy * c01 + dx * (1 - dy) * c10 + dx * dy * c11) * (1.0/ 255.0);
}
public override vect3d sample(vect3d pos)
{
// find modulo value (texture wrapping)
vect2d p = new vect2d((pos.x % 1) * bmp.Width, ((1 - pos.y) % 1) * bmp.Height);
if (p.x < 0)
p.x += bmp.Width;
if (p.y < 0)
p.y += bmp.Height;
// get color out of bmp
Color color = bmp.GetPixel((int)p.x, (int)p.y);
return new vect3d(color.R / 255.0, color.G / 255.0, color.B / 255.0);
}
public void draw(ref vect2d dst, ref vect2d src, ref vect2d dim)
{
// find texture coordinates
float texX1 = (float)(src.x / w);
float texY1 = (float)(src.y / h);
float texX2 = (float)((src.x + dim.x) / w);
float texY2 = (float)((src.y + dim.y) / h);
// bind it
GL.BindTexture(TextureTarget.Texture2D, tex_id);
// draw it
GL.Begin(BeginMode.Quads);
GL.TexCoord2(texX1, texY1);
GL.Vertex2((float)dst.x, (float)dst.y);
GL.TexCoord2(texX2, texY1);
GL.Vertex2((float)(dst.x + dim.x), (float)dst.y);
GL.TexCoord2(texX2, texY2);
GL.Vertex2((float)(dst.x + dim.x), (float)(dst.y + dim.y));
GL.TexCoord2(texX1, texY2);
GL.Vertex2((float)dst.x, (float)(dst.y + dim.y));
GL.End();
}
public void draw(ref vect2d dst)
{
// find texture coordinates
float texX1 = 0;
float texY1 = 0;
float texX2 = 1;
float texY2 = 1;
// bind it
GL.BindTexture(TextureTarget.Texture2D, tex_id);
// draw it
GL.Begin(BeginMode.Quads);
GL.TexCoord2(texX1, texY1);
GL.Vertex2((float)dst.x, (float)dst.y);
GL.TexCoord2(texX2, texY1);
GL.Vertex2((float)(dst.x + w), (float)dst.y);
GL.TexCoord2(texX2, texY2);
GL.Vertex2((float)(dst.x + w), (float)(dst.y + h));
GL.TexCoord2(texX1, texY2);
GL.Vertex2((float)dst.x, (float)(dst.y + h));
GL.End();
}
public bool Equals(vect2d b)
{
return x == b.x && y == b.y;
}
public bool Equals(vect2d b)
{
return(x == b.x && y == b.y);
}
