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rockfall.c
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rockfall.c
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/*
* ROCK.C
*
* COPYRIGHT : 1992 Echidna.
* PROGRAMMER : Gregg A. Tavares
* VERSION : 00.000
* CREATED : 06/22/92
* MODIFIED : 06/23/92
* TABS : 05 09
*
* \|///-_
* \oo///_
* -----w/-w------
* E C H I D N A
* ---------------
*
* DESCRIPTION
*
*
* HISTORY
*
*/
#include <echidna/platform.h>
#include "switches.h"
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <conio.h>
#include <dos.h>
#include <time.h>
#include <exec/types.h>
#include <echidna/argparse.h>
#include <echidna/eerrors.h>
/**************************** C O N S T A N T S ***************************/
/******************************** T Y P E S *******************************/
typedef struct {
UBYTE Chr;
UBYTE Attr;
} Pixel;
typedef struct {
UBYTE Flags;
UWORD Extra; // Not Used Yet, use for whatever.
} Thing;
/****************************** G L O B A L S *****************************/
/******************************* M A C R O S ******************************/
/***************************** R O U T I N E S ****************************/
//;
//;ROCKFALL ROUTINE
//;
#define NUMPLAY 2
#define MAPAREA (MAPWIDTH * MAPHEIGHT) // map area
#define MAPAREAI (MAPAREA - 1) // map area index
// screen codes
#define SPACESYM 32 // space
#define BORDERSYM 97 // border
#define DIRTSYM 98 // dirt
#define DFSYM 99 // Dirty E. Face
#define DFRSYM 100 // Dirty E. Face
#define DFLSYM 101 // Dirty E. Face
#define BUTTSYM 102 // butterfly
#define GUARDSYM 103 // guardian
#define DIAEXPLO 104 // diamond explosion
#define DIAEXPLO2 105 // diamond explosion
#define SPAEXPLO 106 // space explosion
#define SPAEXPLO2 107 // space explosion
#define AMEBASYM 108 // amoeba
#define MWALLSYM 109 // magic wall
#define EGGSYM 110 // monster egg
#define EGGWSYM 111 // egg wiggle
#define EGGHSYM 112 // egg hatch
#define EGGOSYM 113 // egg opening
#define WALLSYM 120 // wall
#define DIAMSYM 121 // diamond
#define ROCKSYM 122 // rock
#define MOVED 128 // Status value when moved
#define UNMOVED 127
#define FALL 64 // added to status when falling
#define UNFALL 191 // Status value when FALLING
#define EGGTIME 63
#define MOVEBITS 3
#define UP 0
#define RIGHT 1
#define DOWN 2
#define LEFT 3
#define PTS4 2
#define PTS3 4
#define PTS2 6
#define PTS1 8
#define PTS0 10
#define GROWTHRATE 2
#define CWISE (-1)
#define CCWISE 1
short MAPWIDTH = 80;
short MAPHEIGHT= 25;
short SCRWIDTH = 80;
short ExStP = 0; // explosion stack pointer
short DFAnm = DFRSYM; // Dirt Face code
short GrowFlag = 0;
short ChangeSym= 0;
short Wiggle = 50; // time till egg wiggles
short Crack = 58; // time till egg cracks
short Hatch = 61;
short NumPlayrs= 1;
UBYTE Input;
// initial # of objects on screen
UWORD InitAmebas=1; // amoeba
UWORD InitButts =5; // butterflies
UWORD InitDiams =10; // diamonds
UWORD InitGuards=3; // Guards
UWORD InitRocks =80; // rocks
UWORD InitWalls =0; // walls
UWORD InitMWalls=0; // magic walls.
UWORD AmebaCount=0;
UWORD MaxAmebas =200;
UBYTE AmebaMorph = EGGSYM;
UWORD MagicFlag = FALSE;
UWORD MagicTime = 250;
Pixel far *Display; // array placed over screen mem.
UBYTE Map[80 * 50]; // Map
Thing Status[80 * 50]; // Parallel Status array
UBYTE ExplStak[50]; // explosion stack
UBYTE Dead[NUMPLAY]; // Dirt Face death flag
UBYTE PushT[NUMPLAY]; // # of turns rocks have been pushed
UWORD PosStak[50]; // explosion stack, WARNING, could overflow!
UWORD DFPos[NUMPLAY]; // Dirt Face's pos.
short Direction[4];
short PushD[NUMPLAY]; // Rock Delay, number of times rock must be pushed.
/*********************************************************************
*
* DrawThing
*
* SYNOPSIS
* void DrawThing (UWORD pos)
*
* PURPOSE
* Draw a thing on the screen at map position POS
*
* INPUT
*
*
* EFFECTS
*
*
* RETURN VALUE
*
*
* HISTORY
*
*
* SEE ALSO
*
*/
void DrawThing (UWORD pos)
{
/*-------------------------------------------------------------------------*/
#if FUNC_NAMES
CurrentFuncName = "DrawThing";
#endif
#if REQUIRE
#endif
/*-------------------------------------------------------------------------*/
{
static UBYTE ConvertTable[][2] = {
{ '±', 0x1B,}, // 97 // border
{ '∞', 0x19,}, // 98 // dirt
{ '', 0x1F,}, // 99 // Dirty E. Face
{ '>', 0x1F,}, // 100 // Dirty E. Face
{ '<', 0x1F,}, // 101 // Dirty E. Face
{ 'X', 0x1B,}, // 102 // butterfly
{ '#', 0x1E,}, // 103 // guardian
{ '*', 0x1F,}, // 104 // diamond explosion
{ 'x', 0x1F,}, // 105 // diamond explosion
{ '+', 0x1E,}, // 106 // space explosion
{ '.', 0x1E,}, // 107 // space explosion
{ '˜', 0x2A,}, // 108 // amoeba
{ '±', 0x19,}, // 109 // magic wall
{ '@', 0x1A,}, // 110 // monster egg
{ 'O', 0x1A,}, // 111 // egg wiggle
{ 'Q', 0x1A,}, // 112 // egg hatch
{ 'w', 0x1A,}, // 113 // egg opening
{ ' ', 0x00,}, // 114
{ ' ', 0x00,}, // 115
{ ' ', 0x00,}, // 116
{ ' ', 0x00,}, // 117
{ ' ', 0x00,}, // 118
{ ' ', 0x00,}, // 119
{ '≤', 0x1C,}, // 120 // wall
{ '', 0x1D,}, // 121 // diamond
{ 'Ï', 0x17,}, // 122 // rock
};
UBYTE type;
UBYTE chr;
UBYTE attr;
type = Map[pos];
if (type == SPACESYM) {
attr = 0x17;
chr = ' ';
} else {
attr = ConvertTable[type - 97][1];
chr = ConvertTable[type - 97][0];
if (type == MWALLSYM && MagicFlag) {
attr = (MagicTime & 1) ? 0x19 : 0x1B;
}
}
pos = (pos / MAPWIDTH) * SCRWIDTH + pos % MAPWIDTH;
Display[pos].Chr = chr;
Display[pos].Attr = attr;
}
} /* DrawThing */
/*********************************************************************
*
* Place
*
* SYNOPSIS
* void Place(
* UBYTE Sym,
* UBYTE Stat,
* UBYTE Rep,
* UWORD Many)
*
* PURPOSE
* Place Many Sym's on the screen with Rep to the right and down.
*
*
* INPUT
*
*
* EFFECTS
*
*
* RETURN VALUE
*
*
* HISTORY
*
*
* SEE ALSO
*
*/
void Place(
UBYTE Sym,
UBYTE stat,
UBYTE Rep,
UWORD Many)
{
/*-------------------------------------------------------------------------*/
#if FUNC_NAMES
CurrentFuncName = "Place";
#endif
#if REQUIRE
#endif
/*-------------------------------------------------------------------------*/
{
UWORD count;
UBYTE r;
UBYTE c;
UWORD P;
stat = stat; // stat not used but could be to init direction.
count = 0;
while (count < Many) {
// Set up things
r = random (MAPHEIGHT - 1) + 1;
c = random (MAPWIDTH - 1) + 1 ;
P = r * MAPWIDTH + c;
if (Map[P] == DIRTSYM) {
count++;
Map[P] = Sym;
DrawThing(P);
if (Map[P + 1] == DIRTSYM) {
Map[P + 1] = Rep;
DrawThing(P + 1);
}
if (Map[P + MAPWIDTH + 1] == DIRTSYM) {
Map[P + MAPWIDTH + 1] = Rep;
DrawThing(P + MAPWIDTH + 1);
}
if (Map[P + MAPWIDTH] == DIRTSYM) {
Map [P + MAPWIDTH] = Rep;
DrawThing(P + MAPWIDTH);
}
}
}
}
} /* Place */
/*********************************************************************
*
* InitWorld
*
* SYNOPSIS
* void InitWorld (void)
*
* PURPOSE
* Sets up initial random world within
* given parameters
*
*
* INPUT
*
*
* EFFECTS
*
*
* RETURN VALUE
*
*
* HISTORY
*
*
* SEE ALSO
*
*/
void InitWorld (void)
{
/*-------------------------------------------------------------------------*/
#if FUNC_NAMES
CurrentFuncName = "InitWorld";
#endif
#if REQUIRE
#endif
/*-------------------------------------------------------------------------*/
{
short i;
short np;
//
// Fill the map with dirt.
//
for (i = 0; i < MAPAREA; i++) {
Map[i] = DIRTSYM;
Status[i].Flags = 0;
Status[i].Extra = 0;
DrawThing (i);
}
Place(DIAMSYM, 0, DIRTSYM, InitDiams);
Place(WALLSYM, 0, DIRTSYM, InitWalls);
Place(ROCKSYM, 0, DIRTSYM, InitRocks);
Place(GUARDSYM, UP, SPACESYM, InitGuards);
Place(BUTTSYM, DOWN, SPACESYM, InitButts);
Place(AMEBASYM, 0, DIRTSYM, InitAmebas);
Place(MWALLSYM, 0, DIRTSYM, InitMWalls);
//
// Place the players in the upper left and upper right
//
DFPos[0] = MAPWIDTH + 1;
DFPos[1] = MAPWIDTH * 2 - 2;
//
// Draw and init both players
//
for (i = 0; i < NumPlayrs; i++) {
np = DFPos[i];
Map[np] = DFSYM;
DrawThing (np);
Dead[i] = FALSE;
}
}
} /* InitWorld */
/*********************************************************************
*
* PrintWorld
*
* SYNOPSIS
* void PrintWorld (void)
*
* PURPOSE
* Print border
*
*
* INPUT
*
*
* EFFECTS
*
*
* RETURN VALUE
*
*
* HISTORY
*
*
* SEE ALSO
*
*/
void PrintWorld (void)
{
/*-------------------------------------------------------------------------*/
#if FUNC_NAMES
CurrentFuncName = "PrintWorld";
#endif
#if REQUIRE
#endif
/*-------------------------------------------------------------------------*/
{
short i;
short pos;
for (i = 0; i < MAPWIDTH; i++) {
Map[i] = BORDERSYM;
DrawThing (i);
pos = MAPAREA - 1 - i;
Map[pos] = BORDERSYM;
DrawThing (pos);
}
for (i = 0; i < MAPHEIGHT; i++) {
pos = i * MAPWIDTH;
Map[pos] = BORDERSYM;
DrawThing (pos);
pos += MAPWIDTH - 1;
Map[pos] = BORDERSYM;
DrawThing (pos);
}
}
} /* PrintWorld */
/*********************************************************************
*
* AddScore
*
* SYNOPSIS
* void AddScore (short amount, player)
*
* PURPOSE
* Add Score to player.
*
* INPUT
*
*
* EFFECTS
*
*
* RETURN VALUE
*
*
* HISTORY
*
*
* SEE ALSO
*
*/
void AddScore (short amount, short player)
{
/*-------------------------------------------------------------------------*/
#if FUNC_NAMES
CurrentFuncName = "AddScore";
#endif
#if REQUIRE
#endif
/*-------------------------------------------------------------------------*/
amount = amount; // suppress unused warning
player = player; // suppress unused warning
} /* AddScore */
/*********************************************************************
*
* Explode
*
* SYNOPSIS
* void Explode (void)
*
* PURPOSE
* Sets 3x3 block of screen memory
* equal to Sym with upper left corner
* at Pos.
*
* INPUT
*
*
* EFFECTS
*
*
* RETURN VALUE
*
*
* HISTORY
*
*
* SEE ALSO
*
*/
void Explode (void)
{
/*-------------------------------------------------------------------------*/
#if FUNC_NAMES
CurrentFuncName = "Explode";
#endif
#if REQUIRE
#endif
/*-------------------------------------------------------------------------*/
{
UBYTE Sym;
UWORD Pos;
short i;
short y;
while (ExStP > 0) {
Sym = ExplStak[ExStP];
Pos = PosStak[ExStP];
ExStP--;
for (y = 0; y < 3; y++) {
for (i = Pos; i <= Pos + 2; i++) {
if (Map[i] != BORDERSYM) {
Map[i] = Sym;
DrawThing (i);
}
}
Pos += MAPWIDTH;
}
}
}
} /* Explode */
/*********************************************************************
*
* AddExplosion
*
* SYNOPSIS
* void AddExplosion (
* UBYTE Sym, // What is exploding, a buttfly or a guardian
* UWORD Pos
* )
*
* PURPOSE
* Add an explosion to the explosion stack.
*
* INPUT
*
*
* EFFECTS
*
*
* RETURN VALUE
*
*
* HISTORY
*
*
* SEE ALSO
*
*/
void AddExplosion (
UBYTE Sym, // What is exploding, a buttfly or a guardian
UWORD Pos
)
{
/*-------------------------------------------------------------------------*/
#if FUNC_NAMES
CurrentFuncName = "AddExplosion";
#endif
#if REQUIRE
#endif
/*-------------------------------------------------------------------------*/
//
// Should add stack checking
//
ExStP++;
if (Sym == BUTTSYM) {
ExplStak[ExStP] = DIAEXPLO;
} else {
ExplStak[ExStP] = SPAEXPLO;
}
PosStak[ExStP] = Pos;
} /* AddExplosion */
/*********************************************************************
*
* DoEnemy
*
* SYNOPSIS
* void DoEnemy (
* UWORD Pos,
* short Search,
* UBYTE Sym
* )
*
* PURPOSE
* moves enemy according to search
* direction
*
* INPUT
*
*
* EFFECTS
*
*
* RETURN VALUE
*
*
* HISTORY
*
*
* SEE ALSO
*
*/
void DoEnemy (
short Pos,
short Search,
UBYTE Sym
)
{
/*-------------------------------------------------------------------------*/
#if FUNC_NAMES
CurrentFuncName = "DoEnemy";
#endif
#if REQUIRE
#endif
/*-------------------------------------------------------------------------*/
{
short i;
short Dir;
short Scan;
short NP;
Scan = -Search;
Dir = (Status[Pos].Flags + Search) & MOVEBITS;
for (i = 0; i < 2; i++) {
NP = Pos + Direction[Dir];
if (Map[NP] == SPACESYM) {
Map[Pos] = SPACESYM;
DrawThing (Pos);
Status[NP].Flags = Dir | MOVED;
if (Dir == UP || Dir == LEFT) {
Status[NP].Flags &= UNMOVED;
}
Map[NP] = Sym;
DrawThing (NP);
/**/ return;
} else if ((Map[NP] == DFSYM ||
Map[NP] == DFRSYM ||
Map[NP] == DFLSYM) ||
Map[NP] == AMEBASYM ||
((Status[NP].Flags & FALL) && Dir == 0)) {
AddExplosion (Sym, Pos - (MAPWIDTH + 1));
/**/ return;
}
Dir = (Dir + Scan) & MOVEBITS;
}
Status[Pos].Flags = Dir;
}
} /* DoEnemy */
/*********************************************************************
*
* DoAmeba
*
* SYNOPSIS
* void DoAmeba (
* UWORD Pos // mineral pos.
* )
*
* PURPOSE
*
*
* INPUT
*
*
* EFFECTS
*
*
* RETURN VALUE
*
*
* HISTORY
*
*
* SEE ALSO
*
*/
void DoAmeba (
UWORD Pos // mineral pos.
)
{
/*-------------------------------------------------------------------------*/
#if FUNC_NAMES
CurrentFuncName = "DoAmeba";
#endif
#if REQUIRE
#endif
/*-------------------------------------------------------------------------*/
{
UBYTE OldDir;
UBYTE Dir;
UWORD NP;
AmebaCount++;
if (ChangeSym == 0) {
Dir = random (256) & MOVEBITS;
OldDir = Dir;
do {
NP = Pos + Direction[Dir];
if (Map[NP] == SPACESYM ||
Map[NP] == DIRTSYM) {
GrowFlag = TRUE;
if (random(256) < GROWTHRATE) {
Status[NP].Flags |= MOVED;
if (Dir == UP || Dir == LEFT) {
Status[NP].Flags &= UNMOVED;
}
Map[NP] = AMEBASYM;
DrawThing (NP);
/**/ return;
}
}
Dir = (Dir + 1) & MOVEBITS;
} while (Dir != OldDir);
} else {
Map[Pos] = ChangeSym;
Status[Pos].Flags = 0;
DrawThing (Pos);
}
}
} /* DoAmeba */
/*********************************************************************
*
* DoMineral
*
* SYNOPSIS
* void DoMineral (
* UWORD P, // Mineral Pos.
* UBYTE MinSym // symbol.
* )
*
* PURPOSE
*
*
* INPUT
*
*
* EFFECTS
*
*
* RETURN VALUE
*
*
* HISTORY
*
*
* SEE ALSO
*
*/
void DoMineral (
UWORD P, // Mineral Pos.
UBYTE MinSym // symbol.
)
{
/*-------------------------------------------------------------------------*/
#if FUNC_NAMES
CurrentFuncName = "DoMineral";
#endif
#if REQUIRE
#endif
/*-------------------------------------------------------------------------*/
#define LDIAG (MAPWIDTH - 1)
#define RDIAG (MAPWIDTH + 1)
{
UWORD NP;
UBYTE L;
UBYTE D;
UBYTE R;
UBYTE LD;
UBYTE RD; // new positions.
LD = Map[P + LDIAG];
D = Map[P + MAPWIDTH ];
RD = Map[P + RDIAG];
L = Map[P - 1];
R = Map[P + 1];
if (D >= MWALLSYM || D == SPACESYM) {
if (D == SPACESYM) {
Map[P] = SPACESYM;
DrawThing (P);
NP = P + MAPWIDTH;
Map[NP] = MinSym;
Status[NP].Flags = Status[P].Flags | FALL | MOVED;
DrawThing (NP);
} else if ((Status[P].Flags & FALL) && D == MWALLSYM) {
UBYTE Sym = SPACESYM;
if (!MagicFlag) {
MagicFlag = TRUE;
}
NP = P + MAPWIDTH * 2;
if (MagicTime && Map[NP] == SPACESYM) {
switch (MinSym) {
case EGGSYM: Sym = GUARDSYM; break;
case DIAMSYM: Sym = ROCKSYM; break;
case ROCKSYM: Sym = DIAMSYM; break;
}
}
Map[P] = SPACESYM;
DrawThing (P);
if (Sym != SPACESYM) {
Map[NP] = Sym;
Status[NP].Flags = Status[P].Flags | FALL | MOVED;
DrawThing (NP);
}
} else {
if (LD == SPACESYM && L == SPACESYM) {
Map[P] = SPACESYM;
DrawThing (P);
NP = P - 1;
Map[NP] = MinSym;
Status[NP].Flags = Status[P].Flags | FALL;
DrawThing (NP);
} else if (RD == SPACESYM && R == SPACESYM) {
Map[P] = SPACESYM;
DrawThing (P);
NP = P + 1;
Map[NP] = MinSym;
Status[NP].Flags = Status[P].Flags | FALL | MOVED;
DrawThing (NP);
} else {
Status[P].Flags &= UNFALL;
}
}
} else if ((Status[P].Flags & FALL) && D >= DFSYM && D <= GUARDSYM) {
AddExplosion (D, P - 1);
} else {
Status[P].Flags &= UNFALL;
}
}
} /* DoMineral */
/*********************************************************************
*
* DoEgg
*
* SYNOPSIS
* void DoEgg (
* UWORD Pos
* )
*
* PURPOSE
* move egg and hatch it if
* it is time.
*
*
* INPUT
*
*
* EFFECTS
*
*
* RETURN VALUE
*
*
* HISTORY
*
*
* SEE ALSO
*
*/
void DoEgg (
UWORD Pos
)
{
/*-------------------------------------------------------------------------*/
#if FUNC_NAMES
CurrentFuncName = "DoEgg";
#endif
#if REQUIRE
#endif
/*-------------------------------------------------------------------------*/
{
UBYTE Age;
UWORD ESym;
if (!(Status[Pos].Flags & FALL)) {
Status[Pos].Flags += 1;
}
Age = Status[Pos].Flags & EGGTIME;
if (Age == Wiggle) {
Map[Pos] = EGGWSYM;
DrawThing (Pos);
} else if (Age == Crack) {
Map[Pos] = EGGHSYM;
DrawThing (Pos);
} else if (Age >= Hatch) {
Map[Pos] = BUTTSYM;
DrawThing (Pos);
}
ESym = Map[Pos];
if (ESym != BUTTSYM) {
DoMineral (Pos, ESym);
}
}
} /* DoEgg */
/*********************************************************************
*
* NextGen
*
* SYNOPSIS
* void NextGen (void)
*
* PURPOSE
* Scans entire playfield processing
* each object according to its type