private static void SetPixelIfInside(DirectBitmap bitmap, int x, int y, FragColor color)
{
if (x > 0 && x < bitmap.Width && y > 0 && y < bitmap.Height)
{
bitmap.SetPixel(x, y, color);
}
}
public void SetPixel(int x, int y, FragColor color)
{
int index = x + (y * Width);
int col = color.Color.ToArgb();
Bits[index] = col;
}
private static FragColor CalculatePixelColor(Vector3 position, Vector3 normal, Vector2 texCoords, Vector3 cameraPos, Material material, IList <Light> lights, DirectBitmap texture)
{
var pixelColor = new FragColor();
var kd = texture?.GetPixel(texCoords) ?? material.DiffuseColor;
foreach (var light in lights)
{
// diffuse
var lightDir = (light.Position - position).Normalized;
var diff = Math.Max(Vector3.Dot(normal, lightDir), 0);
var diffuse = diff * kd * light.DiffuseLight;
// specular
var viewDir = (cameraPos - position).Normalized;
var reflectDir = Vector3.Reflect(-lightDir, normal);
var spec = (float)Math.Pow(Math.Max(Vector3.Dot(viewDir, reflectDir), 0.0f), material.Shininess);
var specular = spec * material.SpecularColor * light.SpecularLight;
pixelColor += material.AmbientColor * AmbientLight + (diffuse + specular) * GetAttenuation(light, position);
}
return(pixelColor);
}