public override Color32 Value(Vector3 dir)
{
float theta = Mathf.Atan2(dir.z, dir.x);
float phi = Mathf.Acos(dir.y);
var m_direction = 0;
theta += m_direction * Mathf.PI / 180.0f;
while (theta < -Mathf.PI)
{
theta += Mathf.PI + Mathf.PI;
}
while (theta > Mathf.PI)
{
theta -= Mathf.PI + Mathf.PI;
}
float dx = theta / Mathf.PI;
float dy = phi / Mathf.PI;
dx = dx * 0.5f + 0.5f;
int px = (int)(dx * src.w);
if (px < 0)
{
px = 0;
}
if (px >= src.w)
{
px = src.w - 1;
}
int py = (int)(dy * src.w);
if (py < 0)
{
py = 0;
}
if (py >= src.w)
{
py = src.w - 1;
}
Color32 col = src.Value(px, src.w - py - 1, Vector3.zero);
return(col);
}
public override Color32 Shade(Vertex p) => texture.Value(p.uv.X, p.uv.Y, Vector3.One);
