Exemplos de ray::orig em C++ (Cpp)

Exemplo n.º 1

Arquivo: kdtree.cpp Projeto: blargg/ray-based-graphics

IntersectionData KDTree::searchNode(KDNode *node, const ray &viewRay, double tmin, double tmax, int curAxis) {
    assert(tmin <= tmax);
    assert(curAxis >= 0 && curAxis < 3);
    if(node->is_leaf) {
        return closestIntersection(node->objects, viewRay);
    }

    int nextAxis = (curAxis + 1) % 3;
    double tSplit = (node->split_pos - viewRay.orig(curAxis)) / viewRay.dir(curAxis);
    KDNode *nearNode, *farNode;
    if(viewRay.orig(curAxis) < node->split_pos) {
        nearNode = node->left;
        farNode = node->right;
    } else {
        nearNode = node->right;
        farNode = node->left;
    }


    if(tSplit > tmax) {
        return searchNode(nearNode, viewRay, tmin, tmax, nextAxis);
    } else if (tSplit < tmin) {
        if(tSplit > 0)
            return searchNode(farNode, viewRay, tmin, tmax, nextAxis);
        else if(tSplit < 0)
            return searchNode(nearNode, viewRay, tmin, tmax, nextAxis);
        else {
            if(viewRay.dir(curAxis) < 0)
                return searchNode(node->left, viewRay, tmin, tmax, nextAxis);
            else
                return searchNode(node->right, viewRay, tmin, tmax, nextAxis);
        }
    } else {
        if(tSplit > 0) {
            IntersectionData test = searchNode(nearNode, viewRay, tmin, tSplit, nextAxis);
            if(test.obj != NULL && test.time < tSplit + EPSILON)
                return test;
            else
                return searchNode(farNode, viewRay, tSplit, tmax, nextAxis);
        } else {
            return searchNode(nearNode, viewRay, tSplit, tmax, nextAxis);
        }
    }
}