drawable_directional_light.h

/*****************************************************************************
 * VCLib                                                                     *
 * Visual Computing Library                                                  *
 *                                                                           *
 * Copyright(C) 2021-2025                                                    *
 * Visual Computing Lab                                                      *
 * ISTI - Italian National Research Council                                  *
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 * it under the terms of the Mozilla Public License Version 2.0 as published *
 * by the Mozilla Foundation; either version 2 of the License, or            *
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 * 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              *
 * Mozilla Public License Version 2.0                                        *
 * (https://www.mozilla.org/en-US/MPL/2.0/) for more details.                *
 ****************************************************************************/
 
#ifndef VCL_BGFX_DRAWABLE_DRAWABLE_DIRECTIONAL_LIGHT_H
#define VCL_BGFX_DRAWABLE_DRAWABLE_DIRECTIONAL_LIGHT_H
 
#include "uniforms/drawable_directional_light_uniforms.h"
 
#include <vclib/render/drawable/drawable_object.h>
#include <vclib/render/viewer/lights/directional_light.h>
#include <vclib/space/core/matrix.h>
 
#include <vclib/bgfx/buffers/vertex_buffer.h>
#include <vclib/bgfx/context.h>
 
#include <bgfx/bgfx.h>
 
namespace vcl {
 
class DrawableDirectionalLight : public DrawableObject
{
    bool mVisible = false;
 
    Matrix44f mTransform = vcl::Matrix44f::Identity();
 
    std::vector<float> mVertices; // vertices of the drawn lines
    vcl::Color         mColor = vcl::Color::Yellow; // color of the lines
 
    VertexBuffer mVertexCoordBuffer;
 
    DrawableDirectionalLightUniforms mUniform;
 
    // TODO: can we be sure that this is called after the context initialization
    // triggered by a window?
    bgfx::ProgramHandle mProgram =
        Context::instance()
            .programManager()
            .getProgram<VertFragProgram::DRAWABLE_DIRECTIONAL_LIGHT>();
 
public:
    DrawableDirectionalLight();
 
    DrawableDirectionalLight(const DrawableDirectionalLight& other);
 
    DrawableDirectionalLight(DrawableDirectionalLight&& other);
 
    ~DrawableDirectionalLight();
 
    DrawableDirectionalLight& operator=(DrawableDirectionalLight other);
 
    void swap(DrawableDirectionalLight& other);
 
    friend void swap(DrawableDirectionalLight& a, DrawableDirectionalLight& b)
    {
        a.swap(b);
    }
 
    void updateRotation(const vcl::Matrix44f& rot);
 
    const vcl::Color& linesColor() const { return mColor; }
 
    void setLinesColor(const vcl::Color& c);
 
    // DrawableObject interface
 
    void draw(uint viewId) const override;
 
    Box3d boundingBox() const override;
 
    std::shared_ptr<DrawableObject> clone() const& override;
 
    std::shared_ptr<DrawableObject> clone() && override;
 
    bool isVisible() const override { return mVisible; }
 
    void setVisibility(bool vis) override { mVisible = vis; }
 
private:
    void createVertexBuffer();
};
 
} // namespace vcl
 
#endif // VCL_BGFX_DRAWABLE_DRAWABLE_DIRECTIONAL_LIGHT_H