public override Color GetPixel(BaseCamera camera, int x, int y)
{
// Use angles from polar coorinates
var point = camera.ScreenToWorldPoint(new Vec2(x, y));
var z = point.Z;
var length = point.Length;
if (length == 0)
{
return(top);
}
else
{
var vangle = Math.Acos(z / length);
var interpolation_factor = vangle / Math.PI; // angles are 0deg to 180deg (0 to Pi radians)
return(Blend(bottom, top, interpolation_factor));
}
}
public override Color GetPixel(BaseCamera camera, int x, int y)
{
var point = camera.ScreenToWorldPoint(new Vec2(x, y));
var z = point.Z;
var length = point.Length;
if (length == 0)
{
return(Color.White);
}
// Vertical angle (0 - 180deg)
var vangle = Math.Acos(z / length);
var v_interpolation_factor = vangle / Math.PI;
var uvy = (int)(Texture.Height * v_interpolation_factor);
// Horizontal angle (0 - 360deg)
var hangle = Math.Asin(point.Y / (length * Math.Sin(vangle))) + (Math.PI * 0.5);
var h_interpolation_factor = hangle / (2 * Math.PI);
var uvx = (int)(Texture.Width * h_interpolation_factor);
return(this.Texture[uvy, uvx]);
}
