C++ (Cpp) BBox::getDiagonals Exemples

Exemple #1

Fichier : Triangle.cpp Projet : seanzw/yart-cpp

int Triangle::intersectBBox(const BBox &box) const {
    if (box.vertexInside(v[id1]) ||
            box.vertexInside(v[id2]) ||
            box.vertexInside(v[id3])) {
        return 1;
    }

    if (box.triangleOutsideSlash(v[id1], v[id2], v[id3])) {
        return -1;
    }

    // edge test.
    vec3 e1 = v[id2] - v[id1];
    float t1 = length(e1);
    vec3 d1 = normalize(e1);
    Intersection ret = box.intersect(Ray(v[id1], d1, CONST_NEAR, CONST_FAR));
    if (ret.t < t1) {
        return 1;
    }

    vec3 e2 = v[id3] - v[id1];
    float t2 = length(e2);
    vec3 d2 = normalize(e2);
    ret = box.intersect(Ray(v[id1], d2, CONST_NEAR, CONST_FAR));
    if (ret.t < t2) {
        return 1;
    }

    vec3 e3 = v[id3] - v[id2];
    float t3 = length(e3);
    vec3 d3 = normalize(e3);
    ret = box.intersect(Ray(v[id2], d3, CONST_NEAR, CONST_FAR));
    if (ret.t < t3) {
        return 1;
    }

    vector<Ray> diags = box.getDiagonals();
    for (const auto &diag : diags) {
        ret = intersect(diag);
        if (ret.t < CONST_FAR) {
            return 1;
        }
    }

    return -1;
}