drawable_directional_light_uniforms.h

/*****************************************************************************
 * VCLib                                                                     *
 * Visual Computing Library                                                  *
 *                                                                           *
 * Copyright(C) 2021-2026                                                    *
 * 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_DRAWABLE_DIRECTIONAL_LIGHT_UNIFORMS_H
#define VCL_BGFX_DRAWABLE_UNIFORMS_DRAWABLE_DIRECTIONAL_LIGHT_UNIFORMS_H
 
#include <vclib/bgfx/uniform.h>
#include <vclib/space/core/color.h>
 
namespace vcl {
 
class DrawableDirectionalLightUniforms
{
    inline static std::array<float, 4> sLightColor = {1.0, 1.0, 0.0, 1.0};
 
    inline static Uniform sLightColorUniform;
 
public:
    DrawableDirectionalLightUniforms() = delete;
 
    static void setColor(const vcl::Color& color)
    {
        sLightColor[0] = color.redF();
        sLightColor[1] = color.greenF();
        sLightColor[2] = color.blueF();
        sLightColor[3] = color.alphaF();
    }
 
    static void bind()
    {
        // lazy initialization
        // to avoid creating uniforms before bgfx is initialized
        if (!sLightColorUniform.isValid())
            sLightColorUniform = Uniform(
                "u_drawableDirectionalLightColor", bgfx::UniformType::Vec4);
        sLightColorUniform.bind(sLightColor.data());
    }
};
 
} // namespace vcl
 
#endif // VCL_BGFX_DRAWABLE_UNIFORMS_DRAWABLE_DIRECTIONAL_LIGHT_UNIFORMS_H