MRRenderNameObject.h

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#pragma once
 
#include "MRMesh/MRIRenderObject.h"
#include "MRMesh/MRVector2.h"
#include "MRViewer/exports.h"
#include "MRViewer/MRImGui.h"
 
#include <optional>
 
namespace MR
{
 
class RenderNameObject : public virtual IRenderObject
{
    struct Task : BasicUiRenderTask
    {
        const VisualObject* object = nullptr;
        const UiRenderParams* params = nullptr;
 
        ImVec2 windowCornerA;
        ImVec2 windowCornerB;
 
        ImVec2 point;
        ImVec2 point2;
        ImVec2 textCenter;
 
        std::string text;
        ImVec2 textPos;
        ImVec2 textSize;
        ImVec2 paddingA;
        ImVec2 paddingB;
 
        bool prevFrameHovered = false;
        bool isHovered = false;
        bool isActive = false;
 
        MRVIEWER_API void earlyBackwardPass( const BackwardPassParams& backParams ) override;
        MRVIEWER_API void renderPass() override;
    };
    Task task_;
public:
    RenderNameObject( const VisualObject& object ) { task_.object = &object; }
 
    MRVIEWER_API void renderUi( const UiRenderParams& params ) override;
 
    MRVIEWER_API virtual std::string getObjectNameString( const VisualObject& object, ViewportId viewportId ) const;
 
    // The name tag is displayed as a text bubble, attached to a specific point on the model with at most 2-segment line.
    // The first segment offset is specified in 3d model coordinates, and the second offset is in screen coordinates.
    // The offsets can be tiny, since any non-zero offset is automatically extended to make sure the text bubble doesn't overlap the attachment point.
 
    Vector3f nameUiPoint;
 
    Vector3f nameUiLocalOffset;
 
    Vector2f nameUiScreenOffset;
 
    std::optional<Vector3f> nameUiRotateToScreenPlaneAroundSphereCenter;
 
    bool nameUiRotateLocalOffset90Degrees = false;
};
 
}