本文整理汇总了C++中Primitive::getNormalAt方法的典型用法代码示例。如果您正苦于以下问题：C++ Primitive::getNormalAt方法的具体用法？C++ Primitive::getNormalAt怎么用？C++ Primitive::getNormalAt使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Primitive的用法示例。
在下文中一共展示了Primitive::getNormalAt方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: traceRay
Color RayTracer::traceRay (Ray3D ray, float distance) {
Primitive* closestPrim = NULL;
float newDistance;
Color color (0.0, 0.0, 0.0);
for (int i = 0; i < _scene->getNumberOfPrimitives (); i++) {
newDistance = _scene->getPrimitive (i)->findIntersectionWith (ray, distance);
if ((newDistance >= 0.0) && (newDistance < distance)) {
closestPrim = _scene->getPrimitive (i);
distance = newDistance;
}
}
if (closestPrim == NULL) {
return color;
}
if (closestPrim->getIsLight ()) {
color = closestPrim->getColor ();
return color;
}
// calculate diffuse lighting
Vector3 pointOfIntersection = ray.getDirection () * distance + ray.getOrigin ();
Vector3 normal = closestPrim->getNormalAt (pointOfIntersection);
for (int i = 0; i < _scene->getNumberOfPrimitives (); i++) {
Primitive* light = _scene->getPrimitive (i);
if (!light->getIsLight ()) {
// wait, this isn't actually a light ...
continue;
}
Vector3 lightDir = light->getOrigin () - pointOfIntersection;
lightDir.normalize();
float lightCoef = normal.dotProduct (lightDir);
color = color + closestPrim->getColor () * light->getColor () * lightCoef;
}
return color;
}