91 lines
2.3 KiB
C++
91 lines
2.3 KiB
C++
#pragma once
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#include "basics_global.h"
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#include "Vector3.h"
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namespace paysages {
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namespace basics {
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/**
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* A delimited segment in 3D space (mainly useful for rays).
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*/
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class BASICSSHARED_EXPORT SpaceSegment {
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public:
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SpaceSegment(const Vector3 &start, const Vector3 &end);
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SpaceSegment() : SpaceSegment(Vector3(), Vector3()) {
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}
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inline const Vector3 &getStart() const {
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return start;
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}
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inline const Vector3 &getEnd() const {
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return end;
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}
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inline Vector3 getDirection() const {
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return end.sub(start);
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}
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inline double getLength() const {
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return end.sub(start).getNorm();
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}
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inline double getXDiff() const {
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return end.x - start.x;
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}
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inline double getYDiff() const {
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return end.y - start.y;
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}
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inline double getZDiff() const {
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return end.z - start.z;
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}
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/**
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* Keep only the intersection with a slice orthogonal to the Y axis.
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*
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* Return true if a segment remains.
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*/
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bool intersectYInterval(double ymin, double ymax);
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/**
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* Return true if the segment intersects a bounding box, represented by another segment (crossing diagonal).
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*/
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bool intersectBoundingBox(const SpaceSegment &bbox) const;
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/**
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* Return a version of this segment, projected on a X plane.
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*/
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SpaceSegment projectedOnXPlane(double x = 0.0) const;
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/**
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* Return a version of this segment, projected on a Y plane.
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*/
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SpaceSegment projectedOnYPlane(double y = 0.0) const;
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/**
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* Return a version of this segment, projected on a Z plane.
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*/
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SpaceSegment projectedOnZPlane(double z = 0.0) const;
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/**
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* Return a scaled version of this segment.
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*
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* Pay attention, scaling is done from the coordinates origin (0,0,0), not the segment center.
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*/
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SpaceSegment scaled(double factor) const;
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/**
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* Iterate inside a virtual grid.
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*
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* The space is considered as cut into 1.0-sized cubic cells,
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* and the delegate will be called with coordinates of the cells
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* traversed by this segment.
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*
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* Return false if the iteration was aborted by the delegate, true otherwise.
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*/
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bool iterateOnGrid(SpaceGridIterator &delegate);
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private:
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Vector3 start;
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Vector3 end;
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};
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}
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}
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