Function FALCOR_SCRIPT_BINDING

Source/Falcor/Core/Program/ShaderVar.cpp:399–481

}

FALCOR_SCRIPT_BINDING(ShaderVar)
{
    FALCOR_SCRIPT_BINDING_DEPENDENCY(Buffer)
    FALCOR_SCRIPT_BINDING_DEPENDENCY(Texture)

    pybind11::class_<ShaderVar> shaderVar(m, "ShaderVar");

    shaderVar.def("__getitem__", [](ShaderVar& self, std::string_view name) { return self[name]; });
    shaderVar.def("__getattr__", [](ShaderVar& self, std::string_view name) { return self[name]; });

#define def_setter(type)                                                                                          \
    shaderVar.def("__setitem__", [](ShaderVar& self, std::string_view name, type value) { self[name] = value; }); \
    shaderVar.def("__setattr__", [](ShaderVar& self, std::string_view name, type value) { self[name] = value; });

    def_setter(ref<Buffer>);
    def_setter(ref<Texture>);
    def_setter(ref<Sampler>);

    def_setter(uint2);
    def_setter(uint3);
    def_setter(uint4);

    def_setter(int2);
    def_setter(int3);
    def_setter(int4);

    def_setter(bool);
    def_setter(bool2);
    def_setter(bool3);
    def_setter(bool4);

    def_setter(float2);
    def_setter(float3);
    def_setter(float4);

    def_setter(float3x4);
    def_setter(float4x4);

#undef def_setter

    // We need to handle integers and floats specially.
    // Python only has an `int` and `float` type that can have different bit-width.
    // We use reflection data to convert the python types to the correct types before assigning.

    auto set_int = [](ShaderVar& self, std::string_view name, pybind11::int_ value)
    {
        const ReflectionBasicType* basicType = self[name].getType()->unwrapArray()->asBasicType();
        FALCOR_CHECK(basicType, "Error trying to set a variable that is not a basic type.");
        switch (basicType->getType())
        {
        case ReflectionBasicType::Type::Int:
            self[name] = value.cast<int32_t>();
            break;
        case ReflectionBasicType::Type::Uint:
            self[name] = value.cast<uint32_t>();
            break;
        default:
            FALCOR_THROW("Error trying to set a variable that is not an integer type.");