REveCamera #40
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| // @(#)root/eve7:$Id$ | ||
| // Authors: Yuxiao Wang, 2025 | ||
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| /************************************************************************* | ||
| * Copyright (C) 1995-2019, Rene Brun and Fons Rademakers. * | ||
| * All rights reserved. * | ||
| * * | ||
| * For the licensing terms see $ROOTSYS/LICENSE. * | ||
| * For the list of contributors see $ROOTSYS/README/CREDITS. * | ||
| *************************************************************************/ | ||
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| #ifndef ROOT7_REveCamera | ||
| #define ROOT7_REveCamera | ||
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| #include <ROOT/REveElement.hxx> | ||
| #include <ROOT/REveVector.hxx> | ||
| #include <ROOT/REveTrans.hxx> | ||
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| #include <string> | ||
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| namespace ROOT { | ||
| namespace Experimental { | ||
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| class REveCamera : public REveElement | ||
| { | ||
| public: | ||
| enum ECameraType { | ||
| // Perspective | ||
| kCameraPerspXOZ, // XOZ floor | ||
| kCameraPerspYOZ, // YOZ floor | ||
| kCameraPerspXOY, // XOY floor | ||
| // Orthographic | ||
| kCameraOrthoXOY, // Looking down Z axis, X horz, Y vert | ||
| kCameraOrthoXOZ, // Looking along Y axis, X horz, Z vert | ||
| kCameraOrthoZOY, // Looking along X axis, Z horz, Y vert | ||
| kCameraOrthoZOX, // Looking along Y axis, Z horz, X vert | ||
| // Orthographic negative | ||
| kCameraOrthoXnOY, // Looking along Z axis, -X horz, Y vert | ||
| kCameraOrthoXnOZ, // Looking down Y axis, -X horz, Z vert | ||
| kCameraOrthoZnOY, // Looking down X axis, -Z horz, Y vert | ||
| kCameraOrthoZnOX // Looking down Y axis, -Z horz, X vert | ||
| }; | ||
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| private: | ||
| ECameraType fType; | ||
| std::string fName; | ||
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| // Camera transformation matrices | ||
| REveTrans fCamBase; // Base camera matrix (main positioning) | ||
| REveTrans fCamTrans; | ||
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| // Original direction vectors (for Setup) | ||
| // REveVector fV1; // Camera direction vector | ||
| // REveVector fV2; // Camera up vector | ||
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| public: | ||
| REveCamera(); | ||
| REveCamera(const std::string &name); | ||
| virtual ~REveCamera() {} | ||
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| void Setup(ECameraType type, const std::string &name, const REveVector &v1, const REveVector &v2); | ||
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| ECameraType GetType() const { return fType; } | ||
| const std::string &GetCameraName() const { return fName; } | ||
| // const REveVector &GetDir() const { return fV1; } | ||
| // const REveVector &GetUp() const { return fV2; } | ||
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| // void SetDir(const REveVector &v) { fV1 = v; StampObjProps(); } | ||
| // void SetUp(const REveVector &v) { fV2 = v; StampObjProps(); } | ||
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| // Camera matrix accessors | ||
| REveTrans &RefCamBase() { return fCamBase; } | ||
| const REveTrans &GetCamBase() const { return fCamBase; } | ||
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| REveTrans &RefCamTrans() { return fCamTrans; } | ||
| const REveTrans &GetCamTrans() const { return fCamTrans; } | ||
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| void SetCamBase(const REveTrans &base) { fCamBase = base; StampObjProps(); } | ||
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| // receive mtx from client | ||
| void SetCamBaseMtx(const std::vector<Double_t> &arr); | ||
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| void BuildRenderData() override{}; | ||
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| Int_t WriteCoreJson(nlohmann::json &j, Int_t rnr_offset) override; | ||
| }; | ||
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| } // namespace Experimental | ||
| } // namespace ROOT | ||
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| #endif | ||
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,114 @@ | ||
| // @(#)root/eve7:$Id$ | ||
| // Authors: Matevz Tadel & Alja Mrak-Tadel: 2006, 2007, 2018 | ||
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| /************************************************************************* | ||
| * Copyright (C) 1995-2019, Rene Brun and Fons Rademakers. * | ||
| * All rights reserved. * | ||
| * * | ||
| * For the licensing terms see $ROOTSYS/LICENSE. * | ||
| * For the list of contributors see $ROOTSYS/README/CREDITS. * | ||
| *************************************************************************/ | ||
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| #include <ROOT/REveCamera.hxx> | ||
| #include <ROOT/REveManager.hxx> | ||
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| #include <nlohmann/json.hpp> | ||
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| using namespace ROOT::Experimental; | ||
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| //////////////////////////////////////////////////////////////////////////////// | ||
| /// Default constructor | ||
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| REveCamera::REveCamera() : REveElement("REveCamera") | ||
| { | ||
| Setup(kCameraPerspXOZ, "PerspXOZ", REveVector(-1.0, 0.0, 0.0), REveVector(0.0, 1.0, 0.0)); | ||
| fCamBase.UnitTrans(); | ||
| fCamTrans.UnitTrans(); | ||
| } | ||
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| //////////////////////////////////////////////////////////////////////////////// | ||
| /// Constructor with name | ||
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| REveCamera::REveCamera(const std::string &name) : REveElement(name) | ||
| { | ||
| Setup(kCameraPerspXOZ, name, REveVector(-1.0, 0.0, 0.0), REveVector(0.0, 1.0, 0.0)); | ||
| fCamBase.UnitTrans(); | ||
| fCamTrans.UnitTrans(); | ||
| } | ||
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| //////////////////////////////////////////////////////////////////////////////// | ||
| /// Setup camera with type, name, direction and up vectors | ||
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| void REveCamera::Setup(ECameraType type, const std::string &name, const REveVector &v1, const REveVector &v2) | ||
| { | ||
| fType = type; | ||
| fName = name; | ||
| // fV1 = v1; | ||
| // fV2 = v2; | ||
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| // Set up base camera matrix from direction and up vectors | ||
| fCamBase.UnitTrans(); | ||
| fCamTrans.UnitTrans(); | ||
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| // Create a coordinate system from v1 (direction) and v2 (up) | ||
| REveVector dir = v1; | ||
| dir.Normalize(); | ||
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| REveVector up = v2; | ||
| up.Normalize(); | ||
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| // Right vector = dir × up | ||
| REveVector right; | ||
| right.fX = dir.fY * up.fZ - dir.fZ * up.fY; | ||
| right.fY = dir.fZ * up.fX - dir.fX * up.fZ; | ||
| right.fZ = dir.fX * up.fY - dir.fY * up.fX; | ||
| right.Normalize(); | ||
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| // Recalculate up = right × dir for orthogonality | ||
| REveVector newUp; | ||
| newUp.fX = right.fY * dir.fZ - right.fZ * dir.fY; | ||
| newUp.fY = right.fZ * dir.fX - right.fX * dir.fZ; | ||
| newUp.fZ = right.fX * dir.fY - right.fY * dir.fX; | ||
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| // Set rotation part of matrix (as row vectors) | ||
| Double_t *M = fCamBase.Array(); | ||
| M[0] = right.fX; M[4] = right.fY; M[8] = right.fZ; | ||
| M[1] = newUp.fX; M[5] = newUp.fY; M[9] = newUp.fZ; | ||
| M[2] = dir.fX; M[6] = dir.fY; M[10] = dir.fZ; | ||
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| StampObjProps(); | ||
| } | ||
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| //////////////////////////////////////////////////////////////////////////////// | ||
| /// Set camera base matrix from array (called from client via MIR) | ||
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| void REveCamera::SetCamBaseMtx(const std::vector<Double_t> &arr) | ||
| { | ||
| if (arr.size() == 16) { | ||
| fCamBase.SetFromArray(arr.data()); | ||
| StampObjProps(); | ||
| } | ||
| } | ||
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| //////////////////////////////////////////////////////////////////////////////// | ||
| /// Write core JSON for camera | ||
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| Int_t REveCamera::WriteCoreJson(nlohmann::json &j, Int_t rnr_offset) | ||
| { | ||
| Int_t ret = REveElement::WriteCoreJson(j, rnr_offset); | ||
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| j["fType"] = fType; | ||
| j["fName"] = fName; | ||
| // j["fV1"] = {fV1.fX, fV1.fY, fV1.fZ}; | ||
| // j["fV2"] = {fV2.fX, fV2.fY, fV2.fZ}; | ||
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| // Stream both matrices | ||
| // Client will read these as fMatrix arrays (16 elements each) | ||
| const Double_t *camBaseArr = fCamBase.Array(); | ||
| j["camBase"] = std::vector<Double_t>(camBaseArr, camBaseArr + 16); | ||
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| const Double_t *camTransArr = fCamTrans.Array(); | ||
| j["camTrans"] = std::vector<Double_t>(camTransArr, camTransArr + 16); | ||
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| return ret; | ||
| } |
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Remove commented lines with V1, V2.
The camBase matrix is holding this info.
Lines 65-69 can also be removed.