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57 lines
1.4 KiB
C++
57 lines
1.4 KiB
C++
#ifndef PICKINGVISITOR_H
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#define PICKINGVISITOR_H
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#include <glm/glm.hpp>
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#include <vector>
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#include <utility>
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#include "Visitor.h"
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/**
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* @brief The PickingVisitor class is used to
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* capture which objects of a scene are located at the screen
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* coordinate. Typically at mouse cursor coordinates for
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* user interaction.
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*
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* Only a subset of interactive objects (surface and Decorations)
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* are interactive.
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*/
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class PickingVisitor: public Visitor
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{
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std::vector<glm::vec3> points_;
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glm::mat4 modelview_;
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std::vector< std::pair<Node *, glm::vec2> > nodes_;
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public:
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PickingVisitor(glm::vec3 coordinates);
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PickingVisitor(glm::vec3 selectionstart, glm::vec3 selection_end);
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std::vector< std::pair<Node *, glm::vec2> > picked() { return nodes_; }
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// Elements of Scene
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void visit(Scene& n) override;
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void visit(Node& n) override;
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void visit(Group& n) override;
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void visit(Switch& n) override;
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void visit(Primitive& n) override;
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/**
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* @brief visit Surface : picking source rendering surface
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* @param n
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*/
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void visit(Surface& n) override;
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/**
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* @brief visit Handles : picking grabbers of source in geometry view
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* @param n
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*/
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void visit(Handles& n) override;
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/**
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* @brief visit Disk : picking grabber for mixing view
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* @param n
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*/
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void visit(Disk& n) override;
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};
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#endif // PICKINGVISITOR_H
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