光线跟踪器在底部和阴影形状上阴影更亮阴影

Question

这是阴影的代码，虽然我在GitHub的我的存储库中拥有所有代码以便于阅读，this is the main code for the shadows，这是sphere-ray intersections的代码，这是plane-ray intersections的代码：

bool shadowed = false;
Color finalColor = closestObjectColor.Scalar(AMBIENTLIGHT); // Add ambient light to the calculation
for(const auto &lightSource : lightSources)
{
    Vector lightDir = (lightSource->position - intersectionRayPos).Normalize(); // Calculate the directional vector towards the lightSource
    FPType cosineAngle = closestObjectNormal.Dot(lightDir);
    finalColor = finalColor.Scalar(cosineAngle);

    if(cosineAngle > 0)
    {
        Ray shadowRay(intersectionRayPos, (lightSource->position - intersectionRayPos).Normalize()); // Cast a ray from the first intersection to the light

        std::vector<FPType> secondaryIntersections;
        for(const auto &sceneObject : sceneObjects)
        {
            secondaryIntersections.push_back(sceneObject->GetIntersection(shadowRay));
        }

        Vector distanceToLight = lightSource->position + (intersectionRayPos.Negative()).Normalize();
        FPType distanceToLightMagnitude = distanceToLight.Magnitude();

        for(const auto &secondaryIntersection : secondaryIntersections)
        {
            if(secondaryIntersection > TOLERANCE && secondaryIntersection <= distanceToLightMagnitude)
            {
                shadowed = true;
                finalColor = finalColor.Scalar(cosineAngle);
                break;
            }
        }
    }
}
return finalColor.Clip();

问题在于我的阴影在底部或阴影的起点较浅，这张照片中很好地说明了，你可以看到阴影的奇怪形状，我不确定是不是或者不诚实：

在这里可以观察到相同的效果，并且可以非常明显地看到灰色球体后面的栗色球体上的阴影：

另一个错误发生在另一个球体前面的阴影以不良方式移位（蓝色球体后面的栗色球体上的阴影）：

Answer 1

我们用来计算阴影的一种简单方法是：

int hitCount = 0; for（light in allLights）{     Ray point2Light = ...     object = GetObjectHit（point2Light）;     if（object == light）         hitCount ++; }

float shadowDarkness =（float）hitCount /（float）allLights.count;