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路径: \\game3dprogramming\materials\GameFactory\GameFactoryDemo\GameFactory\C2Template\Tank.cpp

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历史版本

#include "Tank.h"

Tank::Tank():RigidEntity("tankbio"),isMoving(false),isRotating(false),mMovingSpeed(7.0f){
}

Tank::~Tank(){}

void Tank::MoveTo(const Vec3& position){
	isMoving = true;
	movingTarget = position;
	RotateTo(position);
}

void Tank::Stop(){
	mRigidPhysObj->Stop();
}

void Tank::movingTo(Real elapsedTime, const Vec3& position){
	Vec3 pos = position;
	//pos.z=0.0f;
	//Vec3 movingVector = (pos - this->GetPosition()).normalisedCopy();
	
	//mControllablePhysObj->SetMovement(movingVector*mMovingSpeed*elapsedTime);
	Real curAngle= this->GetOrientation().getRoll().valueRadians();;
	//this->GetOrientation().ToAngleAxis(curAngle,Vec3(0,0,1.0f));
	Vec3 movingVector = Vec3(-sinf(curAngle),+cosf(curAngle),0.0f)*mMovingSpeed;
	//movingVector.z = -GameScene::GravityValue;//it will bounce up!
	SetPosition(GetPosition()+movingVector*elapsedTime);
	//mRigidPhysObj->ApplyForce(movingVector*5.0f*elapsedTime);
	
	if (isAt(position)){
		isMoving = false;
		isRotating = false;
		Stop();
	}
}

bool Tank::isAt(const Vec3& pos) const{
	return (this->GetPosition()-pos).length()<1.5f;
}

void Tank::FrameMove(Real elapsedTime){
	RigidEntity::FrameMove(elapsedTime);
	if (isMoving) movingTo(elapsedTime,movingTarget);
	if (isRotating) rotatingTo(elapsedTime,rotatingTarget);
}

void Tank::RotateTo(Real angleRadian){
	isRotating = true;
	rotatingTarget = angleRadian;
}

void Tank::RotateTo(const Vec3& position){
	Vec3 pos = position;
	pos.z=0.0f;
	Vec3 movingVector = (pos - this->GetPosition()).normalisedCopy();
	Real angle;
	if (movingVector.x==0){
		if (movingVector.y>0) angle = 3.14159/2;
		else angle = -3.14159/2;
	}else{
		angle = atanf(movingVector.y/movingVector.x);
		if (movingVector.x<0) angle+=3.14159;
	}
	angle+=3*3.14159/2;//to make this angle identical to character angle
	if (angle>3.14159*2) angle-=3.14159*2;//make sure it is not greater than 360 degrees
	RotateTo(angle);
}

void Tank::rotatingTo(Real elapsedTime, Real angleRadian){
	RotateTo(movingTarget);

	Real curAngle = this->GetOrientation().getRoll().valueRadians();
	if (curAngle<0) curAngle+=3.14159*2;

	Real distPlus,distMinus,dist; 
	if (angleRadian>curAngle){
		distPlus = abs(angleRadian-curAngle);
		distMinus = abs(3.14159*2-angleRadian+curAngle);
		if (distPlus<distMinus) dist = distPlus; else dist = -distMinus;
	}else{
		distMinus = abs(curAngle-angleRadian);
		distPlus = abs(3.14159*2-curAngle+angleRadian);
		if (distPlus<distMinus) dist = distPlus; else dist = -distMinus;
	}
	if (abs(dist)>3.14159/180*2){
		//SetOrientation(Quaternion(Radian(curAngle+dist*elapsedTime*2.0f),Vector3::UNIT_Z));
		SetOrientation(GetOrientation()*Quaternion(Radian(dist*elapsedTime*2.0f),Vector3::UNIT_Z));
	}
	//else
	//	isRotating = false;
}

Tank.cpp

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