camera_uniforms.h

/*****************************************************************************
 * VCLib                                                                     *
 * Visual Computing Library                                                  *
 *                                                                           *
 * Copyright(C) 2021-2025                                                    *
 * Visual Computing Lab                                                      *
 * ISTI - Italian National Research Council                                  *
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the              *
 * Mozilla Public License Version 2.0                                        *
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 ****************************************************************************/
 
#ifndef VCL_BGFX_DRAWABLE_UNIFORMS_CAMERA_UNIFORMS_H
#define VCL_BGFX_DRAWABLE_UNIFORMS_CAMERA_UNIFORMS_H
 
#include <vclib/bgfx/uniform.h>
#include <vclib/render/viewer/camera.h>
 
#include <bgfx/bgfx.h>
 
namespace vcl {
 
class CameraUniforms
{
    float mEye[4]     = {0.0, 0.0, 0.0, 0.0}; // eye[3] not used
    float mNearFar[4] = {0.0, 0.0, 0.0, 0.0}; // nearFar[2] and [3] not used
 
    Uniform mCameraEyeUniform =
        Uniform("u_cameraEyePosPack", bgfx::UniformType::Vec4);
 
    Uniform mCameraNearFarUniform =
        Uniform("u_cameraNearFarPack", bgfx::UniformType::Vec4);
 
public:
    CameraUniforms() {}
 
    template<typename S>
    void updateCamera(const vcl::Camera<S>& camera)
    {
        mEye[0] = camera.eye().x();
        mEye[1] = camera.eye().y();
        mEye[2] = camera.eye().z();
 
        mNearFar[0] = camera.nearPlane();
        mNearFar[1] = camera.farPlane();
    }
 
    void bind() const
    {
        mCameraEyeUniform.bind(mEye);
        mCameraNearFarUniform.bind(mNearFar);
    }
};
 
} // namespace vcl
 
#endif // VCL_BGFX_DRAWABLE_UNIFORMS_CAMERA_UNIFORMS_H