本文整理汇总了C++中Intersection::getT方法的典型用法代码示例。如果您正苦于以下问题：C++ Intersection::getT方法的具体用法？C++ Intersection::getT怎么用？C++ Intersection::getT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Intersection的用法示例。
在下文中一共展示了Intersection::getT方法的2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: intersect
inline bool Triangle::intersect(Ray& ray, Intersection& intersection) {
vec3 pvec = cross(ray.direction, edge2);
float det = dot(edge1, pvec);
if(det <= 0.0)
return false;
vec3 tvec = ray.origin - vert0;
float u = dot(tvec, pvec);
if(u < 0.0f || u > det)
return false;
vec3 qvec = cross(tvec, edge1);
float v = dot(ray.direction, qvec);
if(v < 0.0f || u + v > det)
return false;
float t = dot(edge2, qvec);
float inv_det = 1.0f / det;
t *= inv_det;
//u *= inv_det;
//v *= inv_det;
if(t >= intersection.getT())
return false;
intersection.set(t, ray.getPosition(t), cross(edge1, edge2), edge1, this);
return true;
}示例2: rayTrace
Colour* rayTrace(const Colour& ambient, const Point3D& eye, Ray ray, SceneNode* root,
const std::list<Light*>& lights, int level, double fogDist){
if(level <= 0)
return NULL;
Intersection* i = root->intersect(ray);
bool fogOn = true;
if(fogDist <= 0)
fogOn = false;
if(i != NULL){
Colour color(0,0,0);
Colour fog(0.8,0.8,0.8);
Colour diffuse(0,0,0), specular(0,0,0);
Material* material = i->getMaterial();
Vector3D n = i->getNormal();
n.normalize();
Point3D p = i->getPoint();
Vector3D v = eye - p;
v.normalize();
for (std::list<Light*>::const_iterator I = lights.begin(); I != lights.end(); ++I) {
Light light = **I;
Vector3D l = light.position - p;
l.normalize();
Vector3D r = 2*l*n*n - l;
r.normalize();
// shadows
Ray lightRay = Ray(p, l);
Intersection* lightIsc = root->intersect(lightRay);
if(lightIsc == NULL){
// add light contribution
//std::cerr << "light" << std::endl;
if(n*l > 0)
diffuse = diffuse + material->getDiffuse() * (l*n) * light.colour;
if(r*v > 0)
specular = specular + material->getSpecular() * pow((r*v), material->getShininess()) * light.colour;
}
}
//secondaty rays
Vector3D r = 2*v*n*n - v;
r.normalize();
Ray refRay(p, r);
Colour* reflectedColor = rayTrace(ambient, eye, refRay, root, lights, level-1, fogDist);
if(reflectedColor != NULL){
if(n*r > 0)
diffuse = diffuse + material->getDiffuse() * (r*n) * material->getReflectivity() * (*reflectedColor);
if(r*v > 0)
specular = specular + material->getSpecular() * pow((r*v), material->getShininess()) * material->getReflectivity() * (*reflectedColor);
}
color = ambient*material->getColor() + diffuse + specular;
if(fogOn){
double dist = i->getT()/fogDist;
if(dist>1)
dist=1;
color = (1-dist)*color + dist*fog;
}
return new Colour(color);
}
return NULL;
}