sample.cpp

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/*
 * Copyright (C) 2020-2023 Tilt Five, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
 
 
#include "include/TiltFiveNative.hpp"
 
#include <chrono>
#include <iostream>
 
using Client = std::shared_ptr<tiltfive::Client>;
using Glasses = std::shared_ptr<tiltfive::Glasses>;
using Wand = std::shared_ptr<tiltfive::Wand>;
 
// Shim C++14 chrono_literals ms
constexpr std::chrono::milliseconds operator""_ms(unsigned long long ms) {
    return std::chrono::milliseconds(ms);
}
 
//
auto waitForGlasses(Client& client) -> tiltfive::Result<Glasses> {
    std::cout << "Looking for glasses..." << std::flush;
 
    // Loop until we find glasses
    auto glassesList = client->listGlasses();
    if (!glassesList) {
        return glassesList.error();
    }
    while (glassesList->empty()) {
        std::cout << "." << std::flush;
        std::this_thread::sleep_for(100_ms);
 
        // Request a list of the available glasses
        glassesList = client->listGlasses();
        if (!glassesList) {
            return glassesList.error();
        }
    }
 
    // Print out the found glasses
    for (auto& glassesInstance : *glassesList) {
        std::cout << "Found : " << glassesInstance << std::endl;
    }
 
    // Return the first found glasses
    return tiltfive::obtainGlasses(glassesList->front(), client);
}
 
auto doThingsWithWands(const Wand& wand) -> tiltfive::Result<void> {
    std::cout << "Doing something with wand : " << wand << std::endl;
 
    auto start = std::chrono::steady_clock::now();
    do {
        auto report = wand->getLatestReport();
        std::cout << "\r" << report;
    } while ((std::chrono::steady_clock::now() - start) < 10000_ms);
 
    std::cout << std::endl << "Done with wand" << std::endl;
 
    return tiltfive::kSuccess;
}
 
auto waitForWand(Glasses& glasses) -> tiltfive::Result<Wand> {
    std::cout << "Looking for wand..." << std::flush;
 
    auto wandHelper = glasses->getWandStreamHelper();
 
    for (;;) {
        auto wands = wandHelper->listWands();
        if (wands) {
            if (!wands->empty()) {
                std::cout << "Found : " << wands->front() << std::endl;
                return wands->front();
            }
        } else {
            std::cerr << "Error listing wands : " << wands << std::endl;
            return wands.error();
        }
 
        std::cout << "." << std::flush;
        std::this_thread::sleep_for(100_ms);
    }
}
 
auto readPoses(Glasses& glasses) -> tiltfive::Result<void> {
    auto start = std::chrono::steady_clock::now();
    do {
        auto pose = glasses->getLatestGlassesPose(kT5_GlassesPoseUsage_GlassesPresentation);
        if (!pose) {
            if (pose.error() == tiltfive::Error::kTryAgain) {
                std::cout << "\rPose unavailable - Is gameboard visible?                         ";
            } else {
                return pose.error();
            }
        } else {
            std::cout << "\r" << pose;
        }
    } while ((std::chrono::steady_clock::now() - start) < 10000_ms);
 
    return tiltfive::kSuccess;
}
 
auto doThingsWithGlasses(Glasses& glasses) -> tiltfive::Result<void> {
    std::cout << "Doing something with : " << glasses << std::endl;
 
    // Get the friendly name for the glasses
    // This is the name that's user set in the Tilt Five™ control panel.
    auto friendlyName = glasses->getFriendlyName();
    if (friendlyName) {
        std::cout << "Obtained friendly name : " << friendlyName << std::endl;
    } else if (friendlyName.error() == tiltfive::Error::kSettingUnknown) {
        std::cerr << "Couldn't get friendly name : Service reports it's not set" << std::endl;
    } else {
        std::cerr << "Error obtaining friendly name : " << friendlyName << std::endl;
    }
 
    // Get the IPD for the glasses
    // This is user set IPD in the Tilt Five™ control panel.
    auto ipd = glasses->getIpd();
    if (ipd) {
        std::cout << "Obtained IPD : " << ipd << "m" << std::endl;
    } else if (ipd.error() == tiltfive::Error::kSettingUnknown) {
        std::cerr << "Couldn't get IPD : Service reports it's not set" << std::endl;
    } else {
        std::cerr << "Error obtaining IPD : " << ipd << std::endl;
        return ipd.error();
    }
 
    // Wait for a wand to connect
    auto wand = waitForWand(glasses);
    if (wand) {
        auto result = doThingsWithWands(*wand);
        if (!result) {
            std::cerr << "Error doing things with wands : " << result << std::endl;
            return result.error();
        }
    } else {
        std::cerr << "Error waiting for wand : " << wand << std::endl;
        return wand.error();
    }
 
    {
        // Wait for exclusive glasses connection
        auto connectionHelper = glasses->createConnectionHelper("Awesome game - Player 1");
        auto connectionResult = connectionHelper->awaitConnection(10000_ms);
        if (connectionResult) {
            std::cout << "Glasses connected for exclusive use" << std::endl;
        } else {
            std::cerr << "Error connecting glasses for exclusive use : " << connectionResult
                      << std::endl;
            return connectionResult.error();
        }
 
        // Reading poses
        auto result = readPoses(glasses);
        if (!result) {
            std::cerr << "Error reading poses : " << result << std::endl;
            return result.error();
        }
    }
 
    // The connectionHelper is destroyed at the end of the previous scope, but the glasses are still
    // reserved.  Let's release them, then confirm that exclusive ops such as reading poses fails.
    auto releaseResult = glasses->release();
    if (!releaseResult) {
        std::cerr << "Failed to release glasses : " << releaseResult << std::endl;
        return releaseResult.error();
    }
    auto readPosesResult = readPoses(glasses);
    if (readPosesResult) {
        std::cerr << "Reading poses unexpectedly succeeded after glasses release\n";
    } else if (readPosesResult.error() != tiltfive::Error::kNotConnected) {
        std::cerr << "Unexpected pose read error: " << readPosesResult << "\n";
    }
 
    std::cout << std::endl << "Done with glasses" << std::endl;
 
    return tiltfive::kSuccess;
}
 
auto printGameboardDimensions(Client& client) -> tiltfive::Result<void> {
    auto result = client->getGameboardSize(kT5_GameboardType_LE);
    if (!result) {
        return result.error();
    }
 
    float width  = result->viewableExtentPositiveX + result->viewableExtentNegativeX;
    float length = result->viewableExtentPositiveY + result->viewableExtentNegativeY;
    float height = result->viewableExtentPositiveZ;
 
    std::cout << "LE Gameboard size : " << width << "m x " << length << "m x " << height << "m"
              << std::endl;
 
    return tiltfive::kSuccess;
}
 
auto printServiceVersion(Client& client) -> tiltfive::Result<void> {
    auto result = client->getServiceVersion();
    if (!result) {
        return result.error();
    }
 
    std::cout << "Service version : " << result << std::endl;
    return tiltfive::kSuccess;
}
 
auto printUiStatusFlags(Client& client) -> tiltfive::Result<void> {
    auto result = client->isTiltFiveUiRequestingAttention();
    if (!result) {
        return result.error();
    }
    std::cout << "Tilt Five UI (Attention Requested) : " << ((*result) ? "TRUE" : "FALSE")
              << std::endl;
 
    return tiltfive::kSuccess;
}
 
// Convenience function to repeatedly call another function if it returns 'service unavailable'
template <typename T>
auto waitForService(Client& client, const std::function<tiltfive::Result<T>(Client& client)>& func)
    -> tiltfive::Result<T> {
 
    bool waitingForService = false;
    for (;;) {
        auto result = func(client);
        if (result) {
            return result;
        } else if (result.error() != tiltfive::Error::kNoService) {
            return result.error();
        }
 
        std::cout << (waitingForService ? "." : "Waiting for service...") << std::flush;
        waitingForService = true;
        std::this_thread::sleep_for(100_ms);
    }
}
 
class MyParamChangeListener : public tiltfive::ParamChangeListener {
    auto onSysParamChanged(const std::vector<T5_ParamSys>& changed) -> void override {
        for (const auto& param : changed) {
            std::cout << "System Parameter changed : [" << param << "]" << std::endl;
        }
    }
 
    auto onGlassesParamChanged(const Glasses& glasses, const std::vector<T5_ParamGlasses>& changed)
        -> void override {
        for (const auto& param : changed) {
            std::cout << "Glasses Parameter changed : " << glasses << " => [" << param << "]"
                      << std::endl;
        }
    }
};
 
int main(int /* argc */, char** /* argv */) {
    // Create the client
    auto client = tiltfive::obtainClient("com.tiltfive.test", "0.1.0", nullptr);
    if (!client) {
        std::cerr << "Failed to create client : " << client << std::endl;
        std::exit(EXIT_FAILURE);
    }
    std::cout << "Obtained client : " << client << std::endl;
 
    // Create a parameter change helper
    std::shared_ptr<MyParamChangeListener> paramChangeListener(new MyParamChangeListener());
    auto paramChangeHelper = (*client)->createParamChangedHelper(paramChangeListener);
 
    // Get the gameboard dimensions
    auto result = printGameboardDimensions(*client);
    if (!result) {
        std::cerr << "Failed to print gameboard dimensions : " << result << std::endl;
        std::exit(EXIT_FAILURE);
    }
 
    // Get the service version
    result = waitForService<void>(*client, printServiceVersion);
    if (!result) {
        std::cerr << "Failed to get service version : " << result << std::endl;
        std::exit(EXIT_FAILURE);
    }
 
    // Get the UI flags
    result = waitForService<void>(*client, printUiStatusFlags);
    if (!result) {
        std::cerr << "Failed to print UI status flags : " << result << std::endl;
        std::exit(EXIT_FAILURE);
    }
 
    // Wait for glasses
    {
        auto glasses = waitForService<Glasses>(*client, waitForGlasses);
        if (!glasses) {
            std::cerr << "Failed to wait for glasses : " << glasses << std::endl;
            std::exit(EXIT_FAILURE);
        }
 
        // Add the glasses to the parameter change listener
        paramChangeHelper->registerGlasses(*glasses);
 
        // Do things with the glasses
        result = doThingsWithGlasses(*glasses);
        if (!result) {
            std::cerr << "Failed to do things with glasses : " << result << std::endl;
        }
    }
 
    std::cout << "Waiting a little..." << std::endl;
    std::this_thread::sleep_for(5000_ms);
 
    std::cout << "ALL DONE!" << std::endl;
}