62 lines
2 KiB
C++
62 lines
2 KiB
C++
#include "CappedCylinder.h"
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#include "PackStream.h"
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#include "Vector3.h"
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CappedCylinder::CappedCylinder(const Vector3 &base, const Vector3 &direction, double radius, double length)
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: InfiniteCylinder(InfiniteRay(base, direction), radius), length(length),
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container(base.add(direction.scale(length * 0.5)), length * 0.5) {
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}
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int CappedCylinder::findRayIntersection(const InfiniteRay &ray, Vector3 *first_intersection,
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Vector3 *second_intersection) const {
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if (not container.checkRayIntersection(ray)) {
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// We don't hit the containing sphere at all
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return 0;
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} else {
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// TODO Apply the caps
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int count = InfiniteCylinder::findRayIntersection(ray, first_intersection, second_intersection);
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if (count == 0) {
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return 0;
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} else if (count == 2) {
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if (checkPointProjection(first_intersection)) {
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if (checkPointProjection(second_intersection)) {
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return 2;
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} else {
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return 1;
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}
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} else {
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if (checkPointProjection(second_intersection)) {
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*first_intersection = *second_intersection;
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return 1;
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} else {
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return 0;
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}
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}
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} else {
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// count == 1
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if (checkPointProjection(first_intersection)) {
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return 1;
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} else {
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return 0;
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}
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}
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}
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}
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bool CappedCylinder::checkPointProjection(Vector3 *point) const {
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double proj_length = axis.getDirection().dotProduct(point->sub(axis.getOrigin()));
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return 0.0 <= proj_length && proj_length <= length;
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}
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void CappedCylinder::save(PackStream *stream) const {
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InfiniteCylinder::save(stream);
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stream->write(&length);
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}
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void CappedCylinder::load(PackStream *stream) {
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InfiniteCylinder::load(stream);
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stream->read(&length);
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}
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