/// <summary>
/// diffuses the color relative to its light distance
/// </summary>
/// <param name="light"></param>
/// <returns></returns>
public SLVec3f difuse(SLLight light)
{
float NdL = Math.Max(SLVec3f.DotProduct(this.normale, light.direction), 0);
SLVec3f colorD = ((nColor & light.diffuse) * NdL);
return(colorD);
}
/// <summary>
/// Creates a Bitmap with set height and width
/// </summary>
/// <param name="width">Width of the bitmap</param>
/// <param name="height">Height of the bitmap</param>
public BmpG(int width, int height, ZBuffer buffer, SLLight light)
{
this.bmp = new Bitmap(width, height);
zB = buffer;
this.light = light;
this.phong = false;
this.data = bmp.LockBits(new Rectangle(0, 0, bmp.Width, bmp.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
stride = data.Stride;
}
/// <summary>
/// calculates a new color relative to the light
/// </summary>
/// <param name="light">relative to this light</param>
/// <returns>new color</returns>
public SLVec3f colorToLight(SLLight light)
{
if (light.isPhong)
{
this.normale.Normalize();
}
SLVec3f c = spiegel(light) + difuse(light);
return(checkColor(c) * 255);
}
/// <summary>
/// calculates mirror effect from normale relative to the light
/// </summary>
/// <param name="light"></param>
/// <returns></returns>
public SLVec3f spiegel(SLLight light)
{
SLVec3f R = 2 * (SLVec3f.DotProduct(light.direction, this.normale)) * this.normale - light.direction;
SLVec3f E = -(this.posInView);
E.Normalize();
float RsE = (float)Math.Pow(Math.Max(SLVec3f.DotProduct(R, E), 0), 5);
return((light.mirror) * RsE);
}