public Color Trace(Ray renderRay, int lightIndex, int depth)
{
depth -= 1;
objectRender = GetIntersectionObject(renderRay, out hitPosition, out hitNormal);
if (objectRender == null)
{
pixelColor = Color.Black;
return(pixelColor);
}
//if (depth > 0)
//{
// Vector3 reflectDirection = ReflectRay(renderRay.Direction, hitNormal);
// renderRay.Set(hitPosition, reflectDirection);
// Trace(renderRay, lightIndex, depth);
//}
//objectRender = GetIntersectionObject(renderRay, out hitPosition, out hitNormal);
//if (objectRender == null)
//{
// pixelColor = Color.Black;
// return pixelColor;
//}
pixelColor = objectRender.Color;
SetObjectRenderUVProperties();
ProcessUVTexture();
pixelColor = ComputeLight(pixelColor, hitPosition, hitNormal, objectRender, scene.GetPointLight(lightIndex));
return(pixelColor);
}
private PotatoObject GetIntersectionObject(Ray ray, out Vector3 hitPosition, out Vector3 hitNormal)
{
hitPosition = new Vector3();
hitNormal = new Vector3();
PotatoObject obj = GetClosestIntersectObject(ray);
if (obj == null)
{
return(obj);
}
CalcultateHitPositionHitNormal(ray, out hitPosition, out hitNormal, obj);
return(obj);
}
public bool IntersectObjectInTheSceneExcept(PotatoObject obj, Ray ray)
{
foreach (PotatoObject objs in scene.GetPotatoObjects())
{
if (objs == obj)
{
continue;
}
if (objs.Intersect(ray).Intersect)
{
return(true);
}
}
return(false);
}
private PotatoObject GetClosestIntersectObject(Ray ray)
{
IntersectResult intersectResult = new IntersectResult();
PotatoObject obj = null;
float minD = float.PositiveInfinity;
for (int i = 0; i < scene.GetPotatoObjectsCount(); i++)
{
intersectResult = scene.GetPotatoObject(i).Intersect(ray);
if (intersectResult.Intersect && intersectResult.Discriminent < minD)
{
minD = intersectResult.Discriminent;
obj = scene.GetPotatoObject(i);
}
}
return(obj);
}
private float GetIntersectionDiscriminent(PotatoObject objectToRender, Ray ray)
{
return(objectToRender.Intersect(ray.Origin, ray.Direction).Discriminent);
}
private Color ComputeLight(Color finalColor, Vector3 hitPosition, Vector3 hitNormal, PotatoObject objectRender, PotatoPointLight light)
{
Vector3 directionToLight = light.GetDirection(hitPosition);
Ray shadowRay = new Ray(hitPosition, directionToLight);
if (light.InRange(hitPosition))
{
float normalAng = DiffuseAngle(hitPosition, hitNormal, light);
if (normalAng > 0)
{
finalColor = Color.FromArgb((int)Math.Round((light.Color.R + finalColor.R) * 0.5f * normalAng * light.Intensity),
(int)Math.Round((light.Color.G + finalColor.G) * 0.5f * normalAng * light.Intensity),
(int)Math.Round((light.Color.B + finalColor.B) * 0.5f * normalAng * light.Intensity));
}
else
{
finalColor = Color.Black;
}
}
return(finalColor);
}
public bool IsIntersectObjectInTheScene(Ray ray)
{
PotatoObject obj = GetClosestIntersectObject(ray);
return(obj != null);
}
private void CalcultateHitPositionHitNormal(Ray ray, out Vector3 hitPosition, out Vector3 hitNornal, PotatoObject obj)
{
float discr = GetIntersectionDiscriminent(obj, ray);
hitPosition = CalculateHitPosition(discr, ray);
hitNornal = CalculateHitNormal(obj, hitPosition);
}
public bool IsIntersect(PotatoObject obj, Ray ray)
{
return(obj.Intersect(ray).Intersect);
}
private Vector3 CalculateHitNormal(PotatoObject objectToRender, Vector3 hitPosition)
{
return(objectToRender.GetNormal(hitPosition));
}