/******************

	X-Wing Animation

	ScoTT Campbell
	27/1/99

	**************/




#include "../headers/shipanim.h"


#define NULL_SHIP_ANIMATION		((void*)0)



ship_animation_type* CreateShipAnimation()
{
	ship_animation_type* shipAnim;

	shipAnim = (ship_animation_type*)malloc(sizeof(ship_animation_type));

	if(shipAnim == NULL_SHIP_ANIMATION)
		return NULL_SHIP_ANIMATION;

	else
		return shipAnim;

}/* CreateShipAnimation */



int DestroyShipAnimation(ship_animation_type* shipAnim)
{
	if(shipAnim != NULL_SHIP_ANIMATION)
		free((void*)shipAnim);

	else
		return 1;

	return 0;

}/* DestroyShipAnimation */



void InitialiseShipAnimation(ship_animation_type* shipAnim, int totalFrames, 
							 unsigned long int startAddress, unsigned long int imageSize, 
							 int speed)
{
	int i;
	unsigned long int nextAddress = startAddress;

	for(i=0; i<totalFrames; i++)
	{
		InitSprite(&shipAnim->shipSpritesArray[i], 
								nextAddress, 0, 0);

		nextAddress += imageSize;

	}

	InitialiseSpriteAnimation(&shipAnim->animation, shipAnim->shipSpritesArray, 
							  totalFrames, SCREEN_WIDTH/2, SCREEN_HEIGHT/2,
							  NON_CONTINUOUS);

	shipAnim->shipSpeed = speed;
									

}/* InitialiseShipAnimation */



void UpdateShipAnimation(ship_animation_type* shipAnim, unsigned long int padValue)
{
	static int smoother = 0;

	if(smoother)
	{

		if(padValue & PAD1_LEFT)
			UpdateCurrentSprite(&shipAnim->animation, -1);
		
		if(padValue & PAD1_RIGHT)
			UpdateCurrentSprite(&shipAnim->animation, 1);
	
		if(!((padValue & PAD1_LEFT) | (padValue & PAD1_RIGHT)))
		{
			if(shipAnim->animation.currentSprite < 4)
				UpdateCurrentSprite(&shipAnim->animation, 1);
			else
			if(shipAnim->animation.currentSprite > 4)
				UpdateCurrentSprite(&shipAnim->animation, -1);
	
		}
	
		smoother--;
	
	}
	else
		smoother++;

	MoveSpriteAnimation(&shipAnim->animation, shipAnim->animation.currentSprite - 4, 0);
	
	if(padValue & PAD1_DOWN)
		MoveSpriteAnimation(&shipAnim->animation, 0, shipAnim->shipSpeed);	
	if(padValue & PAD1_UP)
		MoveSpriteAnimation(&shipAnim->animation, 0, -shipAnim->shipSpeed);

}/* UpdateShipAnimation */



void DrawShipAnimation(ship_animation_type* shipAnim, GsOT* otPtr, int priority)
{
	DrawSpriteAnimation(&shipAnim->animation, otPtr, priority);

}/* DrawShipAnimation */