tfArrowRenderer.h

/*******************************************************************************
 * This file is part of Tissue Forge.
 * Copyright (c) 2022-2024 T.J. Sego
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 * 
 ******************************************************************************/
 
#ifndef _SOURCE_RENDERING_TFARROWRENDERER_H_
#define _SOURCE_RENDERING_TFARROWRENDERER_H_
 
#include "tfSubRenderer.h"
 
#include <shaders/tfPhong.h>
#include "tfStyle.h"
 
#include <Magnum/GL/Mesh.h>
#include <Magnum/Math/Color.h>
#include <Magnum/Mesh.h>
 
#include <utility>
#include <vector>
 
 
namespace TissueForge::rendering {
 
 
    struct CAPI_EXPORT ArrowData {
        // Position of the arrow
        fVector3 position;
 
        // Vector components of the arrow
        fVector3 components;
 
        // Tissue Forge style
        Style style;
 
        // Scaling applied to arrow
        float scale = 1.0;
 
    private:
 
        int id;
        friend struct ArrowRenderer;
    };
 
    struct ArrowInstanceData {
        Magnum::Matrix4 transformationMatrix;
        Magnum::Matrix3 normalMatrix;
        Magnum::Color4 color;
    };
 
    struct ArrowRenderer : SubRenderer {
 
        // Current number of arrows in inventory
        int nr_arrows;
 
        // Arrow inventory
        std::vector<ArrowData *> arrows;
 
        ArrowRenderer();
        ArrowRenderer(const ArrowRenderer &other);
        ~ArrowRenderer();
 
        HRESULT start(const std::vector<fVector4> &clipPlanes) override;
        HRESULT draw(ArcBallCamera *camera, const iVector2 &viewportSize, const fMatrix4 &modelViewMat) override;
        const unsigned addClipPlaneEquation(const Magnum::Vector4& pe) override;
        const unsigned removeClipPlaneEquation(const unsigned int &id) override;
        void setClipPlaneEquation(unsigned id, const Magnum::Vector4& pe) override;
        void setAmbientColor(const Magnum::Color3& color) override;
        void setDiffuseColor(const Magnum::Color3& color) override;
        void setSpecularColor(const Magnum::Color3& color) override;
        void setShininess(float shininess) override;
        void setLightDirection(const fVector3& lightDir) override;
        void setLightColor(const Magnum::Color3 &color) override;
 
        int addArrow(ArrowData *arrow);
 
        std::pair<int, ArrowData*> addArrow(
            const fVector3 &position, 
            const fVector3 &components, 
            const Style &style, 
            const float &scale=1.0
        );
 
        HRESULT removeArrow(const int &arrowId);
 
        ArrowData *getArrow(const int &arrowId);
 
        static ArrowRenderer *get();
 
    private:
 
        int _arrowDetail = 10;
        
        std::vector<Magnum::Vector4> _clipPlanes;
 
        Magnum::GL::Buffer _bufferHead{Corrade::Containers::NoCreate};
        Magnum::GL::Buffer _bufferCylinder{Corrade::Containers::NoCreate};
        Magnum::GL::Mesh _meshHead{Corrade::Containers::NoCreate};
        Magnum::GL::Mesh _meshCylinder{Corrade::Containers::NoCreate};
        shaders::Phong _shader{Corrade::Containers::NoCreate};
 
        int nextDataId();
 
    };
 
    fMatrix3 vectorFrameRotation(const fVector3 &vec);
 
};
 
#endif // _SOURCE_RENDERING_TFARROWRENDERER_H_