// ***********************************************************************************
// Program written by B. Swan - BURROWINGGERBIL@HOTMAIL.COM
// ***********************************************************************************

// **** include files ****************************************************************

#include <libps.h>                   				   			  // include standard Yaroze lib
#include <stdlib.h>																	  // include standard C lib
#include "pad.h"                                      // include pad reading lib
//#include "scrngrab.h"

// **** definitions ******************************************************************

#define BLOCK_ADDRESS (0x80090000)										// location of block data in memory
#define LEVEL_ADDRESS	(0x80090200)										// location of level data in memory

#define TIM_ADDRESS1  (0x80091970)                    // location of front blocks in memory
#define TIM_ADDRESS2  (0x800a1b90)										// back blocks
#define TIM_ADDRESS3	(0x800a9db0)										// glows
#define TIM_ADDRESS4	(0x800b1fd0)										// player
#define TIM_ADDRESS5	(0x800b5b70)										// enemies

#define VB_ADDRESS		(0x800c5d90)
#define VH_ADDRESS		(0x80117890)

#define SCREEN_WIDTH  (320)
#define SCREEN_HEIGHT (240)

#define NUMBER_OF_ENEMIES		(50)											// maximum number of enemies at once

#define NUMBER_OF_BULLETS		(10)											// maximum number of bulets per player

#define NUMBER_OF_TRIGGERS  (1000)											// maximum number of triggers

#define OTABLE_LENGTH (8)                             // define length of OTable
#define MAX_PACKETS   (128000)                        // guess at length for scratchpad

#define HOLDTIME (50)																	// how long hold fire before charges up

#define MAX(a, b) \
	(a > b ? a : b)

#define MIN(a, b) \
	(a > b ? b : a)

// **** prototypes *****************************************************************

void Initialise(void);                                // triggers all initialisation routines
void InitialiseScreen(void);                          // setups screen resolution etc.
void UpdateWorld(void);                               // move, colour etc all sprites

void RenderStart(void);																// initialise frame variables and screen
void RenderWorld(void);                               // draw the screen scene :)
void DrawFront(void);																  // draw front layer of parallax
void DrawBack(void);																  // draw back layer of parallax
void DrawStars(void);																	// draw stars
void DrawInfo(void);																	// draw information

void DrawPlayers(void);																// draw both player ships
void UpdatePlayers(void);															// react to player input
void DrawSplash(u_short tPlayer, u_short tX);					// draw splash when under waterfall
void DrawSplash2(u_short tPlayer, u_short tY);				// draw splash when in water
void UpdatePlayerBullets(void);												// update all player bullets
void DrawPlayerBullets(void);													// draw all player bullets
void CreatePlayerBullet(u_short tPlayer, short tType);					
																											// create new bullets if necessary
void KillPlayer(u_short tPlayer);											// deal with death

void PlaySound(u_short tS, u_short tVol, u_short tX);	// play sound
short PlayBackSound(void);
void GetVolume(u_short tVol, u_short tX, short *tLeft, short *tRight);
																											// get stereo value

u_short LevelCollision(u_short tPlayer);							// check if player has hit the walls

void LoadTIMData(u_long tMemAddress);                 // copies TIM from main memory to vram
void SetSpriteInfo(GsSPRITE *tSprite, u_long tMemAddress, long tX, long tY);
                                                      // setup up a sprite structure with
                                                      // the correct information
void SetBlocksInfo(GsSPRITE *tSprite, RECT *tRect, long tX, long tY, u_char tCol);
						   	 																      // Chop blocks up correctly into
						      																	  // sprites from more specific data

void AnimateScenery(void);														// Alter block frames
u_short Hit(short x1, short y1, short w1, short h1, short x2, short y2, short w2, short h2);
																											// Check for collision with two rectangles

void NewEnemies(void);																// do new enemies as level scrolls
void UpdateEnemies(void);															// general enemy update handler
void CreateNewComet(short tX, short tY, short tSpeed);
																											// create comet
void CreateNewVolcano(short tX, short tY);						// create volcano
void CreateNewRock(short tX, short tY, short tSpeedX, short tSpeedY);
																											// create volcano rock
void CreateNewWorm(short tAngle, short tPos, short tTime, short tSAngle);
																											// create worm
void CreateNewPowerUp(short tY, short tType);					// powerup
void CreateSmallExplosion(short tX, short tY);				// small explosion

u_short UpdateBigExplosion(u_short tEnemyNumber);		  // update explosion
u_short UpdateMediumExplosion(u_short tEnemyNumber);	// update explosion
u_short UpdateSmallExplosion(u_short tEnemyNumber);		// update explosion
u_short UpdateComet(u_short tEnemyNumber);						// update comet
u_short UpdateVolcano(u_short tEnemyNumber);					// update volcano
u_short UpdateRock(u_short tEnemyNumber);							// update volcano rock
u_short UpdateWormHead(u_short tEnemyNumber);					// update worm parts
u_short UpdateWormBody(u_short tEnemyNumber);					
u_short UpdateWormTail(u_short tEnemyNumber);			
u_short UpdatePowerUp(u_short tEnemyNumber);					// update powerup
u_short UpdatePowerUpGlow(u_short tEnemyNumber);			// update powerup glow

void DeleteEnemy(u_short tEnemy);											// remove all references to enemy from array

u_short EnemyAgainstPlayer(short tX, short tY, short tW, short tH);
																											// deal with enemy collision with player
u_short EnemyAgainstBullets(u_short tEnemy, short tX, short tY, short tW, short tH);
																											// deal with enemy collision with bullets

void CreateLevelTriggers(void);												// Set up where enemies appear in level