directional_light_uniforms.h

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 * VCLib                                                                     *
 * Visual Computing Library                                                  *
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 * Copyright(C) 2021-2025                                                    *
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#ifndef VCL_BGFX_DRAWABLE_UNIFORMS_DIRECTIONAL_LIGHT_UNIFORMS_H
#define VCL_BGFX_DRAWABLE_UNIFORMS_DIRECTIONAL_LIGHT_UNIFORMS_H
 
#include <vclib/bgfx/uniform.h>
#include <vclib/render/viewer/lights/directional_light.h>
 
#include <bgfx/bgfx.h>
 
namespace vcl {
 
class DirectionalLightUniforms
{
    float mDir[4] = {0.0, 0.0, 1.0, 0.0}; // just first 3 components are used
    float mCol[4] = {1.0, 1.0, 1.0, 1.0}; // just first 3 components are used
 
    Uniform mLightDirUniform =
        Uniform("u_lightDirPack", bgfx::UniformType::Vec4);
    Uniform mLightColorUniform =
        Uniform("u_lightColorPack", bgfx::UniformType::Vec4);
 
public:
    DirectionalLightUniforms() {}
 
    template<typename S>
    void updateLight(const vcl::DirectionalLight<S>& light)
    {
        mDir[0] = light.direction().x();
        mDir[1] = light.direction().y();
        mDir[2] = light.direction().z();
 
        mCol[0] = light.color().redF();
        mCol[1] = light.color().greenF();
        mCol[2] = light.color().blueF();
        // light color alpha is not used
    }
    void updateLight(const vcl::DirectionalLight<S>& light) {…}
 
    void bind() const
    {
        mLightDirUniform.bind(mDir);
        mLightColorUniform.bind(mCol);
    }
};
class DirectionalLightUniforms {…};
 
} // namespace vcl
 
#endif // VCL_BGFX_DRAWABLE_UNIFORMS_DIRECTIONAL_LIGHT_UNIFORMS_H