人物模型走路的问题,是OGRE,SDK里的例子,一段代码不太懂,求教

myj870517 2011-07-17 11:01:52



if (mKeyDirection != Vector3::ZERO && mBaseAnimID != ANIM_DANCE)

		{

			// calculate actually goal direction in world based on player's key directions

			mGoalDirection += mKeyDirection.z * mCameraNode->getOrientation().zAxis();

			mGoalDirection += mKeyDirection.x * mCameraNode->getOrientation().xAxis();

			mGoalDirection.y = 0;

			mGoalDirection.normalise();



			Quaternion toGoal = mBodyNode->getOrientation().zAxis().getRotationTo(mGoalDirection);



			// calculate how much the character has to turn to face goal direction

			Real yawToGoal = toGoal.getYaw().valueDegrees();

			// this is how much the character CAN turn this frame

			Real yawAtSpeed = yawToGoal / Math::Abs(yawToGoal) * deltaTime * TURN_SPEED;

			// reduce "turnability" if we're in midair

			if (mBaseAnimID == ANIM_JUMP_LOOP) yawAtSpeed *= 0.2f;



			// turn as much as we can, but not more than we need to

			if (yawToGoal < 0) yawToGoal = std::min<Real>(0, std::max<Real>(yawToGoal, yawAtSpeed)); //yawToGoal = Math::Clamp<Real>(yawToGoal, yawAtSpeed, 0);

			else if (yawToGoal > 0) yawToGoal = std::max<Real>(0, std::min<Real>(yawToGoal, yawAtSpeed)); //yawToGoal = Math::Clamp<Real>(yawToGoal, 0, yawAtSpeed);

			

			mBodyNode->yaw(Degree(yawToGoal));



			// move in current body direction (not the goal direction)

			mBodyNode->translate(0, 0, deltaTime * RUN_SPEED * mAnims[mBaseAnimID]->getWeight(),

				Node::TS_LOCAL);

		}

第一第二句是什么意思呢,为什么要和摄像机NODE有关系,zAxis()是什么意思呢
mGoalDirection += mKeyDirection.z * mCameraNode->getOrientation().zAxis();
mGoalDirection += mKeyDirection.x * mCameraNode->getOrientation().xAxis();

如果向下面这样写可以吗
直走
SinbadTranslate += sinbadNode->getLocalAxes() * Ogre::Vector3(0,0,-1);
sinbadNode->translate(SinbadTranslate * evt.timeSinceLastFrame * 50.0f);
转弯
float rotX = CInputManager::GetInstance()->returnMouse()->getMouseState().X.rel * evt.timeSinceLastFrame * -1;
character->turnAround(rotX/5);

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