哪个是最好的机器人模拟器？截至目前,我只是希望得到潜在场方法,Bug算法,A*算法等的简单模拟!
已知的机器人模拟器列表是;
一些更通用的平台/中间件也提供模拟工具:
关于机器人模拟器的一些参考:
升级到Mac OS X 10.9/Xcode 5.0.1后,创建共享库(.dylib)的命令行失败,出现了几个未定义的符号.
clang++ -dynamiclib -install_name test.dylib *.o -o test.dylib
Undefined symbols for architecture x86_64:
"std::allocator<char>::allocator()", referenced from:
_main in test.o
"std::allocator<char>::~allocator()", referenced from:
_main in test.o
"std::ostream::operator<<(std::ostream& (*)(std::ostream&))", referenced from:
_main in test.o
"std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(char const*, std::allocator<char> const&)", referenced from:
_main in test.o
"std::basic_string<char, std::char_traits<char>, std::allocator<char> >::~basic_string()", referenced from:
_main in test.o
"std::ios_base::Init::Init()", referenced from:
___cxx_global_var_init in test.o
"std::ios_base::Init::~Init()", referenced from:
___cxx_global_var_init in test.o
"std::cout", referenced from:
_main in test.o
"std::basic_ostream<char, std::char_traits<char> >& std::endl<char, std::char_traits<char> …我想在QObjects不修改其他信号/插槽行为的情况下,一般地和暂时地阻止两者之间的信号,并且不知道它们的上下文.
像QObject :: blockSignals(bool)之类的东西,但只在两个之间起作用QObjects.
也就是说,实现以下SignalBlocker::blockSignals(bool)功能:
class SignalBlocker {
public:
SignalBlocker(QObject *sender, QObject *receiver) :
mSender(sender), mReceiver(receiver) {}
void blockSignals(bool block);
private:
QObject *mSender, *mReceiver;
}
通过断开和重新连接对象是可能的,但首先必须存储信号/时隙列表.似乎自省方法不足够强大来实现这一(我看了看QMetaObject,并QSignalSpy没有成功).
我想查看读取QFile的QTextStream的下一个字符,以便创建一个有效的标记器.
但是,我没有找到任何令人满意的解决方案.
QFile f("test.txt");
f.open(QIODevice::WriteOnly);
f.write("Hello world\nHello universe\n");
f.close();
f.open(QIODevice::ReadOnly);
QTextStream s(&f);
int i = 0;
while (!s.atEnd()) {
++i;
qDebug() << "Peek" << i << s.device()->peek(3);
QString v;
s >> v;
qDebug() << "Word" << i << v;
}
给出以下输出:
Peek 1 "Hel" # it works only the first time
Word 1 "Hello"
Peek 2 ""
Word 2 "world"
Peek 3 ""
Word 3 "Hello"
Peek 4 ""
Word 4 "universe"
Peek 5 ""
Word 5 ""
我尝试了几个实现,也使用了QTextStream :: …
在Ubuntu 14.04上,我正在尝试做一个蓝牙设备列表的小例子,但我正面临着一个关于在编写这个简约演示时与蓝牙共享库链接的简单问题http://people.csail.mit.edu/albert /bluez-intro/c404.html:
$ sudo apt-get install libbluetooth-dev
$ gcc -lbluetooth simplescan.c -o simplescan
/tmp/ccuwRsB5.o: In function `main':
simplescan.c:(.text+0x79): undefined reference to `hci_get_route'
simplescan.c:(.text+0x8c): undefined reference to `hci_open_dev'
simplescan.c:(.text+0x132): undefined reference to `hci_inquiry'
simplescan.c:(.text+0x18f): undefined reference to `ba2str'
simplescan.c:(.text+0x1f0): undefined reference to `hci_read_remote_name'
collect2: error: ld returned 1 exit status
$ nm -D /usr/lib/x86_64-linux-gnu/libbluetooth.so.3.13.0 | grep hci_get_route
0000000000008f00 T hci_get_route
似乎找到蓝牙共享库并包含所需的功能,但链接阶段无法实现.
When my ThreeJS custom shaders contains errors, I get the very cryptic INVALID_OPERATION message in the JS console during the rendering stage:
WebGL: INVALID_OPERATION: useProgram: program not valid
Is there a way to get a more useful log, such as the one returned by getShaderInfoLog()?
(To test this quickly, one can add errors in the shaders of this app.)