Method setProgramState

core/2d/MotionStreak.cpp:225–262

}

bool MotionStreak::setProgramState(backend::ProgramState* programState, bool ownPS /*= false*/)
{
    if (Node::setProgramState(programState, ownPS))
    {
        AXASSERT(programState, "argument should not be nullptr");
        auto& pipelineDescriptor        = _customCommand.getPipelineDescriptor();
        pipelineDescriptor.programState = _programState;

        _mvpMatrixLocaiton = _programState->getUniformLocation("u_MVPMatrix");
        _textureLocation   = _programState->getUniformLocation("u_tex0");

        // setup custom vertex layout for V2F_T2F_C4B
        const auto& attributeInfo = _programState->getProgram()->getActiveAttributes();
        auto iter                 = attributeInfo.find("a_position");
        auto layout               = _programState->getMutableVertexLayout();
        if (iter != attributeInfo.end())
        {
            layout->setAttrib("a_position", iter->second.location, backend::VertexFormat::FLOAT2, 0, false);
        }
        iter = attributeInfo.find("a_texCoord");
        if (iter != attributeInfo.end())
        {
            layout->setAttrib("a_texCoord", iter->second.location, backend::VertexFormat::FLOAT2,
                                      2 * sizeof(float), false);
        }
        iter = attributeInfo.find("a_color");
        if (iter != attributeInfo.end())
        {
            layout->setAttrib("a_color", iter->second.location, backend::VertexFormat::UBYTE4,
                                      4 * sizeof(float), true);
        }
        layout->setStride(4 * sizeof(float) + 4 * sizeof(uint8_t));

        updateProgramStateTexture(_texture);
        return true;
    }
    return false;
}

void MotionStreak::setBlendFunc(const BlendFunc& blendFunc)
{