corley.txt

国外游戏开发者杂志1998年第四期配套代码

Listing 1

class AnimatedObject {

// An interface to an animated object. Most comments are
// left out for brevity. See accompanying article for
// full descriptions of everything here.

// StandardTransitionTime is 1/10 second, 100 milliseconds
static const float StandardTransitionTime=100f;
// DefaultMsPerFrame is 1/30 second
static const float DefaultMsPerFrame=33.333333f;

// The intent is to provide an interface only, but some of the data
// mentioned in the article is presented below. Obviously, in a full
// animation engine implementation, there will be much more data
// in this object.

int currentAnimation;	// ID of animation playing now
float currentAnimationTime; // current frame of current animation
int nextAnimation; // ID of next animation to play, -1 if none set
float msPerFrame;	// current playback rate setting
bool loopCurrentAnim; // true if current animation should loop

// Every animated object has to have a pointer to the animation data
// it is capable of playing. Actual implementation is up to you.
AnimationData *animationData;

public:
AnimatedObject(AnimationData *animDataIn); // constructor
void PlayAnimation(int animNum, float startTime=0f, float transitionTime=0f);
inline void PlayAnimationAtTime(int animNum, float startTime)
{ PlayAnimation(animNum, startTime); }
inline void TransitionIntoAnimation(int animNum)
{ PlayAnimation(animNum, 0f, StandardTransitionTime); }
inline void TransitionIntoAnimationAtTime(int animNum, float startTime)
{ PlayAnimation(animNum, startTime, StandardTransitionTime); }

void SetNextAnimation(int next);

void EnableLoopedAnimation();
void DisableLoopedAnimation();
bool IsAnimationLooped();

void PlayNextAnimation();
void TransitionIntoNextAnimation();

void StopAnimation();
void StartAnimation();

void SetMsPerFrame(float newRate=DefaultMsPerFrame);
float GetMsPerFrame();

void CaptureRotationChannel(int which);
void CaptureTranslationChannel(int which);

int GetCurrentAnimation();
float GetAnimationTimeInMs();
float GetAnimationTimeInFrames();
bool InTransition();
bool IsAnimationLooped();

int GetNextAnimation();
void GetGlobalPosition(int joint, float &x, float &y, float &z);
void GetCurrentVelocity(float &x, float &y, float &z);
void SetCurrentVelocity(float x, float y, float z);
float GetAnimLengthInMs(int animNum);

};





Listing 2

inline void PlayAnimationAtTime(int animNum, float startTime)
{ PlayAnimation(animNum, startTime); }






Listing 3

inline void TransitionIntoAnimation(int animNum)
{ PlayAnimation(animNum, 0f, StandardTransitionTime); }




Listing 4

inline void TransitionIntoAnimationAtTime(int animNum, float startTime)
{ PlayAnimation(animNum, startTime, StandardTransitionTime); }




Listing 5

void EnableLoopedAnimation();
void DisableLoopedAnimation();
bool IsAnimationLooped();




Listing 6

int GetNextAnimation();
void GetGlobalPosition(int joint, float &x, float &y, float &z);
void GetCurrentVelocity(float &x, float &y, float &z);
void SetCurrentVelocity(float x, float y, float z);
float GetAnimLengthInMs(int animNum);
bool IsAnimationLooped();