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posh_expansion [2010/04/05 02:54] honza Info about my plans for posh |
posh_expansion [2010/05/16 23:11] (current) |
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| ==== Engine ==== | ==== Engine ==== | ||
| This idea looks appealing and simple, in reality, it is not so rosy. How exactly should it work and how well would it work in real life? I don't know...yet, but I have some ideas. | This idea looks appealing and simple, in reality, it is not so rosy. How exactly should it work and how well would it work in real life? I don't know...yet, but I have some ideas. | ||
| + | |||
| + | === Proposition === | ||
| + | So how does single evaluation could look like? | ||
| + | |||
| + | **DC.fire(): | ||
| + | if (goal fulfilled) | ||
| + | return Done, plan is done, bot has done its job | ||
| + | | ||
| + | for every DE according to priority: | ||
| + | // is trigger of DE ok and is interval between this DE calls less than DE freq. | ||
| + | if (DE.isReady()): | ||
| + | DE.fire() | ||
| + | return ElementFired; | ||
| + | return Fail, no elements fired | ||
| + | |||
| + | **DE.fire(): | ||
| + | // call element furthest in the callstack | ||
| + | element2fire = DE.callStack.last | ||
| + | result = DE.callStack.fire(element2fire) | ||
| + | |||
| + | **callstack.fire(element): | ||
| + | result = element.fire() | ||
| + | switch (result): | ||
| + | case OK: | ||
| + | // element was fired, but there is no change to callstack. | ||
| + | // typical case is successful execution of non-last primitive in AP. | ||
| + | do nothing | ||
| + | case Dive: | ||
| + | // the element has fired AP or C and it hasn't returned immediately | ||
| + | // = it wasn't primitive. The element represented in new stack level | ||
| + | // will be next one in execution call. | ||
| + | // careful, don't use same object to represent the element, there are multiple | ||
| + | // callstacks in various state of execution. Joanna calls it something like | ||
| + | // local copy of control state. | ||
| + | callstack.add(result.getElement()) | ||
| + | case Surface: | ||
| + | // Yay, element hasn't failed and has done its work and its goal is finished | ||
| + | // Cases : AP has been finished without fail, C goal is fulfilled. | ||
| + | callstack.remove() | ||
| + | case Fail: | ||
| + | // element failed miserably. | ||
| + | // This causes stack to call the method specified in the DE during initialization | ||
| + | reset the callstack. | ||
| + | | ||
| + | **primitive.fire(): | ||
| + | return callJavaPrimitive() | ||
| ===== Current state ===== | ===== Current state ===== | ||