本文整理汇总了C++中Hit类的典型用法代码示例。如果您正苦于以下问题：C++ Hit类的具体用法？C++ Hit怎么用？C++ Hit使用的例子？那么, 这里精选的类代码示例或许可以为您提供帮助。
在下文中一共展示了Hit类的15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
bool Sphere::intersect(const Ray &r, Hit &h, float tmin)
{
//直线方程 P = t*D + R ①
//圆方程 ||P||= raduis ②
//将①带入②, 由点乘的性质(满足分配率，交换律)，求得t^2+2RDt+R^2-r^2=0
//得t = -RD±sqrt(RD^2-R^2+r^2)
//选择距离较近的那个点t = -RD-sqrt(RD^2-R^2+r^2)
Vec3f D = r.getDirection();
Vec3f R = r.getOrigin()-center;
float R2 = R.Dot3(R);
float RD = R.Dot3(D);
float b2_4ac = RD*RD-R2+radius*radius;//R2 RD RDRD这些其实可以存在ray里，但是算法研究以程序清晰为要
if(b2_4ac<0)return 0;
float t;
t = -RD - sqrt(b2_4ac);
if(t<0){
t = -RD + sqrt(b2_4ac);
if(t < 0)return 0;
}
if(t<h.getT())
{
h.set(t, &color, r);
}
return 1;
}示例2: plane_intersect
bool Face::plane_intersect(const Ray &r, Hit &h, bool intersect_backfacing) const {
// insert the explicit equation for the ray into the implicit equation of the plane
// equation for a plane
// ax + by + cz = d;
// normal . p + direction = 0
// plug in ray
// origin + direction * t = p(t)
// origin . normal + t * direction . normal = d;
// t = d - origin.normal / direction.normal;
glm::vec3 normal = computeNormal();
float d = glm::dot(normal,(*this)[0]->get());
float numer = d - glm::dot(r.getOrigin(),normal);
float denom = glm::dot(r.getDirection(),normal);
if (denom == 0) return 0; // parallel to plane
if (!intersect_backfacing && glm::dot(normal,r.getDirection()) >= 0)
return 0; // hit the backside
float t = numer / denom;
if (t > EPSILON && t < h.getT()) {
h.set(t,this->getMaterial(),normal);
assert (h.getT() >= EPSILON);
return 1;
}
return 0;
}示例3: intersect
/*
The intersect routine will first transform the ray,
then delegate to the intersect routine of the contained
object. Make sure to correctly transform the resulting
normal according to the rule seen in lecture. You may
choose to normalize the direction of the transformed ray
or leave it un-normalized. If you decide not to normalize
the direction, you might need to update some of your intersection code.
*/
bool Transform::intersect(const Ray &r, Hit &h, float tmin)
{
Vec3f r0 = r.getOrigin();
Vec3f rd = r.getDirection();
Matrix inv;
matrix.Inverse(inv);
inv.Transform(r0);
inv.TransformDirection(rd);
if (object != NULL)
{
//这里的h是有问题的，作如下修改：
bool judge = object->intersect(Ray(r0,rd), h, tmin);
Vec3f normal = h.getNormal();
//这里很奇怪，normal的方向没有修正，然而结果却是对的
//改了之后反而是错的！！
//这里确定normal没有错，那么就是之后应用normal的
//问题
//好吧，就是这里的问题
//经过把图形摆正，发现求的法向量没有问题，但是没有单位化…………！
matrix.TransformDirection(normal);
normal.Normalize();
//or：
//Matrix change,res;
//matrix.Inverse(change);
//change.Transpose(res);
//res.TransformDirection(normal);
h.set(h.getT(), h.getMaterial(), normal, r);
return judge;
}
return false;
}示例4: LineSegment
void coTouchIntersection::intersect(const osg::Matrix &handMat, bool mouseHit)
{
cerr << "coTouchIntersection::intersect info: called" << endl;
Vec3 q0, q1, q2, q3, q4, q5;
// 3 line segments for interscetion test hand-object
// of course this test can fail
q0.set(0.0f, -0.5f * handSize, 0.0f);
q1.set(0.0f, 0.5f * handSize, 0.0f);
q2.set(-0.5f * handSize, 0.0f, 0.0f);
q3.set(0.5f * handSize, 0.0f, 0.0f);
q4.set(0.0f, 0.0f, -0.5f * handSize);
q5.set(0.0f, 0.0f, 0.5f * handSize);
// xform the intersection line segment
q0 = handMat.preMult(q0);
q1 = handMat.preMult(q1);
q2 = handMat.preMult(q2);
q3 = handMat.preMult(q3);
q4 = handMat.preMult(q4);
q5 = handMat.preMult(q5);
ref_ptr<LineSegment> ray1 = new LineSegment();
ref_ptr<LineSegment> ray2 = new LineSegment();
ref_ptr<LineSegment> ray3 = new LineSegment();
ray1->set(q0, q1);
ray2->set(q2, q3);
ray3->set(q4, q5);
IntersectVisitor visitor;
visitor.addLineSegment(ray1.get());
visitor.addLineSegment(ray2.get());
visitor.addLineSegment(ray3.get());
cover->getScene()->traverse(visitor);
ref_ptr<LineSegment> hitRay = 0;
if (visitor.getNumHits(ray1.get()))
hitRay = ray1;
else if (visitor.getNumHits(ray2.get()))
hitRay = ray2;
else if (visitor.getNumHits(ray3.get()))
hitRay = ray3;
if (visitor.getNumHits(hitRay.get()))
{
Hit hitInformation = visitor.getHitList(hitRay.get()).front();
cover->intersectionHitPointWorld = hitInformation.getWorldIntersectPoint();
cover->intersectionHitPointLocal = hitInformation.getLocalIntersectPoint();
cover->intersectionMatrix = hitInformation._matrix;
cover->intersectedNode = hitInformation._geode;
// walk up to the root and call all coActions
OSGVruiHit hit(hitInformation, mouseHit);
OSGVruiNode node(cover->intersectedNode.get());
callActions(&node, &hit);
}
}示例5: shade
RGBColor Matte::shade(Hit& h){
msgfx::Vector3f wo = -h.ray.Direction();
RGBColor L = _ambientBRDF->rho(h, wo) * h.scenePtr->ambientLight;
int numLights = h.scenePtr->myNumberOfLights;
msgfx::Vector3f wi;
for(int i = 0; i < numLights; ++i)
{
wi = h.scenePtr->myLights[i]->Position() - h.Position();
float d = wi.length();
wi.normalize();
float ndotwi = h.normal.dot(wi);
if(ndotwi > 0.0){
// Calculate attenuation factor
if(h.scenePtr->isPointVisibleToLight(h.Position(), h.scenePtr->myLights[i]))
{
float attenuation = 1 / (d*d*h.scenePtr->myLights[i]->Attenuation().r + d*h.scenePtr->myLights[i]->Attenuation().g + h.scenePtr->myLights[i]->Attenuation().b);
L = L + _diffuseBRDF->f(h, wo, wi) * h.scenePtr->myLights[i]->Color() * ndotwi * attenuation;
}
}
}
return L;
}示例6: Hit
// does the recursive (shadow rays & recursive/glossy rays) work
Vec3f RayTracer::TraceRay(const Ray &ray, Hit &hit, int bounce_count) const
{
hit = Hit();
bool intersect = CastRay(ray,hit,false);
Vec3f answer(args->background_color_linear);
if (intersect == true) {
const Material *m = hit.getMaterial();
assert (m != NULL);
// rays coming from the light source are set to white, don't bother to ray trace further.
if (m->getEmittedColor().Length() > 0.001) {
answer = Vec3f(1,1,1);
} else {
// ambient light
answer = args->ambient_light_linear *
m->getDiffuseColor(hit.get_s(),hit.get_t());
// Shadows
answer += shadows(ray, hit);
// Reflections
Vec3f reflectiveColor = m->getReflectiveColor();
double roughness = m->getRoughness();
if (bounce_count > 0 && reflectiveColor.Length() > MIN_COLOR_LEN) {
answer += reflectiveColor * reflections(ray, hit, bounce_count, roughness);
}
}
}
return answer;
}示例7: plane_intersect
bool Face::plane_intersect(const Ray &r, Hit &h, bool intersect_backfacing, bool* backfacing_hit) {
// insert the explicit equation for the ray into the implicit equation of the plane
// equation for a plane
// ax + by + cz = d;
// normal . p + direction = 0
// plug in ray
// origin + direction * t = p(t)
// origin . normal + t * direction . normal = d;
// t = d - origin.normal / direction.normal;
Vec3f normal = computeNormal();
double d = normal.Dot3((*this)[0]->get());
double numer = d - r.getOrigin().Dot3(normal);
double denom = r.getDirection().Dot3(normal);
if (denom == 0) return 0; // parallel to plane
if (!intersect_backfacing && normal.Dot3(r.getDirection()) >= 0)
return 0; // hit the backside
double t = numer / denom;
if (t > EPSILON && t < h.getT()) {
h.set(t,this->getMaterial(),normal,this);
assert (h.getT() >= EPSILON);
//hit the backside but that's okay in this case
if (normal.Dot3(r.getDirection()) >= 0){
*backfacing_hit = true;
}
return 1;
}
return 0;
}示例8: find_color
Vec3f find_color(Ray ray,Hit hit,Group* group,Camera* camera)
{
int num_lights = sceneParser->getNumLights();
Vec3f cambient = sceneParser->getAmbientLight();
if (group->intersect(ray, hit, camera->getTMin()))//撞到了
{
Vec3f cobject = hit.getMaterial()->getDiffuseColor();
Vec3f canswer = cambient * cobject;
Vec3f clight;
Vec3f light_dir;
Vec3f normal_dir = hit.getNormal();
float distolight;
for (int i = 0; i < num_lights; i++)
{
Light *light = sceneParser->getLight(i);
//light_dir : the direction to the light
// 该方法用于获得指向光的方向，光的颜色，和到达光的距离
light->getIllumination(hit.getIntersectionPoint(), light_dir, clight, distolight);
//cpixel = cambient * cobject + SUMi [ clamped(Li . N) * clighti * cobject ]
//返回局部光
canswer = canswer + hit.getMaterial()->Shade(ray, hit, light_dir, clight)*cobject;
canswer.Clamp();
}
return canswer;
}
else
return sceneParser->getBackgroundColor();
}示例9: intersect
bool Sphere::intersect(const Ray &r, Hit &h, float tmin)
{
Vec3f v = center - r.getOrigin();
float tp = v.Dot3(r.getDirection());
float det = tp*tp - v.Dot3(v) + radius*radius;
//intersect
if(det > 0)
{
//t'
det = sqrtf(det);
float t1 = tp - det;
float t2 = tp + det;
if(t1 > tmin && t1 < h.getT())
{
Vec3f normal = (r.pointAtParameter(t1) - center);
normal /= radius;
normal.Normalize();
h.set(t1,material,normal,r);
return 1;
}
else if(t2 > tmin && t2 < h.getT())
{
//sphere's normal
Vec3f normal = (r.pointAtParameter(t2) - center);
normal /= radius;
normal.Normalize();
h.set(t2,material,normal,r);
return 1;
}
}
return 0;
}示例10: Intersect
bool Transform::Intersect(const Ray &r, Hit &h, float tmin) const
{
bool result = false;
Matrix m = m_matrix;
if ( m.Inverse() )
{
Vec3f org = r.getOrigin();
Vec3f dir = r.getDirection();
m.Transform(org);
m.TransformDirection(dir);
Ray r2 (dir, org);
result = m_pObject->Intersect(r2, h, tmin);
if (result)
{
Matrix m1 = m;
m1.Transpose();
Vec3f n = h.getNormal();
m1.TransformDirection(n);
n.Normalize();
h.set(h.getT(), h.getMaterial(), n, r);
}
}
return result;
}示例11: assert
bool Plane::intersect(const Ray & r, Hit & h, float tmin)
{
assert (tmin >= 0.0f);
Vec3f org = r.getOrigin();
Vec3f dir = r.getDirection();
if (dir.Dot3(normal) < 1.0e-7 && dir.Dot3(normal) > -1.0e-7) {
return false;
} // Appromately parrell to plane
float tempT = (offset - org.Dot3(normal)) / dir.Dot3(normal);
if (tempT <= 1e-6) {
return false;
}
else if (tempT >= tmin && tempT < h.getT())
{
// Update Hit Point
normal.Normalize();
h.set(tempT, NULL, normal, color, r);
return true;
}
return false;
}示例12: pick
boolean StandardPicker::pick(Canvas* c, Glyph* glyph, int depth, Hit& h) {
if (!h.event()) {
return false;
}
const Event& e = *h.event();
if (e.grabber()) {
h.target(depth, glyph, 0, e.grabber());
return true;
}
event(e);
long cnt = handlers_[ms_]->count();
for (long i=0; i < cnt; ++i) {
ButtonHandler& b = *handlers_[ms_]->item(i);
if (b.eb_ == Event::any || b.eb_ == mb_) {
if (b.handler_) {
h.target(depth, glyph, 0, b.handler_);
}else{
b.rband_->canvas(c);
h.target(depth, glyph, 0, b.rband_);
}
return true;
}
}
return false;
}示例13: compare_rows
bool compare_rows(const Hit& lhs, const Hit& rhs){
if(lhs.get_row() < rhs.get_row())
return true;
else{
return false;
}
}示例14: pick
void Space::pick(Canvas*, const Allocation& a, int depth, Hit& h) {
Coord x = h.left();
Coord left = a.left();
Coord right = a.right();
if (x >= left && x < right) {
h.target(depth, this, (x > (left+right)/2) ? 1 : 0);
}
}示例15: intersect
bool Transform::intersect(const Ray& r, Hit& h, float tmin)
{
bool b = o->intersect(Ray((mInverse*Vector4f(r.getOrigin(),1)).xyz(), mInverse3*r.getDirection()), h, tmin);
if (b) { h.setNormal((mInverseT3*(h.getNormal())).normalized()); }
return b;
}