/Users/frarees/Desktop/rv1/source/inc/Spark.h

#ifndef __SPARK_H__
#define __SPARK_H__

#include "Typedefs.h"
#ifdef _PC
#include "Draw.h"
#endif
#ifdef _N64
#include "faceme.h"
#endif

struct object_def;

// The different kinds of sparks
typedef enum SparkTypeEnum {
  SPARK_NONE = -1,
  SPARK_SPARK = 0,
  SPARK_SPARK2,
  SPARK_SNOW,
  SPARK_POPCORN,
  SPARK_GRAVEL,
  SPARK_SAND,
  SPARK_MUD,
  SPARK_ELECTRIC,
  SPARK_WATER,
  SPARK_DIRT,
  SPARK_SMOKE1,
  SPARK_SMOKE2,
  SPARK_SMOKE3,
  SPARK_BLUE,
  SPARK_BIGBLUE,
  SPARK_SMALLORANGE,
  SPARK_SMALLRED,
  SPARK_EXPLOSION1,
  SPARK_EXPLOSION2,
  SPARK_STAR,

  SPARK_NTYPES
} SPARK_TYPE;

//
// Spark trail info
//

enum {
  TRAIL_NONE = -1,
  TRAIL_FIREWORK = 0,
  TRAIL_SPARK,
  TRAIL_SMOKE,

  TRAIL_NTYPES
};

#define MAX_TRAILS      (128)
#define TRAIL_MAX_BITS    (12)

#define TRAIL_FADES     (0x1)
#define TRAIL_SHRINKS   (0x2)
#define TRAIL_EXPANDS   (0x4)

typedef struct TrailDataStruct {
  REAL U, V, Usize, Vsize;
  REAL EndU, EndV;
  long A, R, G, B;
  long Type;
  REAL LifeTime;
  REAL Width;
  long MaxTrails;
} TRAIL_DATA;


typedef struct SparkTrailStruct {
  bool Free;
  VEC Pos[TRAIL_MAX_BITS];
  TRAIL_DATA *Data;
  long FirstTrail;
  long MaxTrails;
  long NTrails;
} TRAIL;


//
// The static info for each different spark type
//

typedef struct SparkDataStruct {
#ifdef _PC
  FACING_POLY FacingPoly;
#endif
#ifdef _N64
  REAL    XSize, YSize;
  GAME_GFX  GfxIdx;
  long    u, v;
  long    w, h;
  long    Colour;
  FACEME_FLAG Flag;
#endif
  long SparkType;       // Bit flags for spark subtypes
  REAL Mass;          // Mass
  REAL Resistance;      // Air resistance
  REAL Friction;        // Sliding friction
  REAL Restitution;     // Bounciness
  unsigned long LifeTime;   // Max lifetime
  unsigned long LifeTimeVar;  // Randomly subratcted from lifetime
  REAL SpinRateBase;      // Average spin rate (radians per second)
  REAL SpinRateVar;     // Variation about spin rate
  REAL SizeVar;       // Variation about size
  REAL GrowRateBase;        // Average grow rate
  REAL GrowRateVar;     // Variation about grow rate
  long TrailType;       // The trail number
} SPARK_DATA;

#define SPARK_WORLD_COLLIDE   (0x1)
#define SPARK_OBJECT_COLLIDE  (0x2)
#define SPARK_CREATE_TRAIL    (0x4)
#define SPARK_FIELD_AFFECT    (0x8)
#define SPARK_SPINS       (0x10)
#define SPARK_GROWS       (0x20)
#define SPARK_CAMERA_COLLIDE  (0x40)
#define SPARK_SEMI        (0x80)


//
// The spark variables
//

typedef struct SparkStruct {
  // Status
  bool Free;        // Whether spark is available
  VISIMASK VisiMask;

  VEC Pos;        // Current position
  VEC Vel;        // Current velocity

  REAL Spin, SpinRate;  // Current angle and rate of spin
  REAL Grow, GrowRate;  // Rate of expansion/ contraction

  TRAIL *Trail;     // the spark trail number if it exists
  REAL TrailTime;
  
  SPARK_DATA *Data;   // Information on type of spark
  
  unsigned long Age;    // Current age
} SPARK;

// Spark generator
typedef struct SparkGenStruct {
  SPARK_TYPE  Type;   // Type of spark
  VISIMASK  VisiMask; // Visibox mask

  struct object_def *Parent;    // Parent object

  VEC   SparkVel;     // Average (parent-relative) velocity
  REAL  SparkVelVar;    // Variation about velocity

  REAL  Time, MaxTime;    // Time and max time between sparks
} SPARK_GEN;


#ifdef _PC
#define MAX_SPARKS  1024          // max number of sparks in game
#endif
#ifdef _N64
#define MAX_SPARKS  512           // max number of sparks in game
#endif
#ifdef _PSX
#define MAX_SPARKS  0
#endif

#define MIN_SPARK_VEL   Real( 100.0f )    // No sparks below this speed
#define MAX_SPARK_VEL   Real( 1600.0f ) // Always sparks above this speed

#define MIN_DUST_IMPULSE  Real( 3.0f )
#define DUST_PROBABILITY  Real( 0.2f )
#define DUST_SCALE      Real( 50.0f )
#define DUST_RND_SCALE    Real( 30.0f )



//
// External function prototypes
//
extern void InitSparks();
extern void ProcessSparks();
extern bool CreateSpark(SPARK_TYPE type, VEC *pos, VEC *vel, REAL velVar, VISIMASK mask);
extern void DrawSparks();
extern REAL SparkProbability(REAL vel);

extern TRAIL *GetFreeTrail(long trailType);
extern void FreeTrail(TRAIL *trail);
extern void UpdateTrail(TRAIL *trail, VEC *newPos);
extern void ModifyFirstTrail(TRAIL *trail, VEC *newPos);
extern void DrawTrails();


//
// Externed Gloabl variables
//

extern SPARK Sparks[MAX_SPARKS];
extern int NActiveSparks;

extern TRAIL SparkTrail[MAX_TRAILS];
extern int NActiveTrails;

#endif

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