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Gigantic Games 2
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cyber_flight
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cyber_flight.c
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C/C++ Source or Header
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1994-12-22
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9KB
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310 lines
/* Circuit Shootem Up - a GameSmith demo. AGA ONLY! */
/*
This program demonstrates use of AGA 7 bitplane dual playfield independent
scrolling (4 planes for playfield 1, and 3 for playfield 2). I was gonna
use 8 bitplanes total, but any colors I added to the 2nd playfield just
detracted from the graphics. I guess that's why I'm a programmer and
not a graphic artist. <grin> The demo also uses a split screen as is
commonly found in many shoot'em up type games. The bottom panel doesn't
do anything. It's just there as an example. -John Enright 4-15-94
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <exec/memory.h>
#include <exec/types.h>
#include <graphics/gfx.h>
#include <graphics/gfxbase.h>
#include <proto/exec.h>
#include <proto/graphics.h>
#include <proto/intuition.h>
#include "GameSmith:GameSmith.h"
#include "GameSmith:include/proto/all_regargs.h"
#include "GameSmith:include/libraries/libptrs.h"
#define BMWIDTH 640
#define BMHEIGHT 400
#define PF1_PLANES 0x55;
#define PF2_PLANES 0xaa;
#define ALL_PLANES 0xff;
/*-------------------------------------------------------------------------*/
/* Function Prototypes */
void scroll(void);
int setup(void);
int check_close(void);
void cleanup(void);
/*-------------------------------------------------------------------------*/
/* some global variables */
struct Interrupt *scroller=NULL;
unsigned long color[48];
/*-------------------------------------------------------------------------*/
struct loadILBM_struct loadpic =
{
NULL, /* ptr to picture name string */
NULL, /* ptr to 1st bitmap */
NULL, /* ptr to 2nd bitmap (if any) */
color, /* ptr to color table array */
16, /* # colors in color table */
NULL, /* height of image in pixels (filled by load call) */
NULL, /* width of image in pixels (filled) */
NULL, /* x display offset (filled) */
NULL, /* y display offset (filled) */
NULL, /* pic mode (filled) */
0, /* x load offset (from left) in bytes */
0, /* y load offset (from top) in rows */
ILBM_COLOR, /* flags (fill color table) */
0xff, /* bitplane fill mask */
0xff, /* bitplane load mask */
NULL /* address of BitMapHeader to fill (none) */
};
unsigned short copper_list[]= {
UC_NOSPRITES, /* turn off sprite DMA */
UC_END /* end custom copper list */
};
struct copper_struct copper =
{
copper_list,
NULL,
NULL
};
struct gs_viewport vp2 =
{
NULL, /* ptr to next viewport */
&color[32], /* ptr to color table */
16, /* number of colors in table */
&copper, /* ptr to user copper list */
47,320,4,47,320, /* height, width, depth, bmheight, bmwidth */
153,0, /* top & left viewport offsets */
0,0, /* X & Y bitmap offsets */
GSVP_ALLOCBM, /* flags (alloc bitmaps) */
NULL,NULL, /* 2.xx & above compatibility stuff */
NULL,NULL, /* bitmap pointers */
NULL, /* future expansion */
0,0,0,0 /* display clip (MinX,MinY,MaxX,MaxY) */
};
struct gs_viewport vp =
{
&vp2, /* ptr to next viewport */
color, /* ptr to color table */
32, /* number of colors in table */
NULL, /* ptr to user copper list */
150,320,7,BMHEIGHT,BMWIDTH, /* height, width, depth, bmheight, bmwidth */
0,0, /* top & left viewport offsets */
0,0, /* X & Y bitmap offsets */
GSVP_DPF|GSVP_ALLOCBM, /* flags (dual playfield,alloc bitmaps) */
NULL,NULL, /* 2.xx & above compatibility stuff */
NULL,NULL, /* bitmap pointers */
NULL, /* future expansion */
0,0,0,0 /* display clip (MinX,MinY,MaxX,MaxY) */
};
struct display_struct display =
{
NULL, /* ptr to previous display view */
NULL,NULL, /* 2.xx & above compatibility stuff */
0,0, /* X and Y display offsets (1.3 style) */
0, /* display mode ID */
GSV_SCROLLABLE, /* flags (scrollable) */
&vp, /* ptr to 1st viewport */
NULL /* future expansion */
};
/***************************************************************************/
main(argc,argv)
int argc;
char *argv[];
{
int err,end=0;
if (gs_open_libs(DOS|GRAPHICS,0)) /* open AmigaDOS libs, latest versions */
exit(01); /* if can't open libs, abort */
if (err=setup()) /* if couldn't get set up... abort program */
{
printf("\nSetup error: %d\n",err);
gs_close_libs(); /* close all libraries */
exit(02);
}
Forbid(); /* take over the entire machine */
while (!end) /* this shows off speed */
{
end=check_close(); /* end when user hits left mouse button */
}
Permit(); /* OK, let other things run while we clean up */
cleanup(); /* close & deallocate everything */
gs_close_libs(); /* close all libraries */
}
/***************************************************************************/
void __interrupt __saveds scroll()
{
int stick,x=0,y=0,diff,velocity=2,x2,y2;
static int timer=0;
static int x_save=0,y_save=0;
stick = _gs_joystick(1);
if (stick & (JOY_LEFT|JOY_RIGHT|JOY_UP|JOY_DOWN))
{
if (stick & JOY_BUTTON1)
velocity<<=1;
if (stick & JOY_LEFT)
x=velocity*-1;
else if (stick & JOY_RIGHT)
x=velocity;
if (stick & JOY_UP)
y=velocity*-1;
else if (stick & JOY_DOWN)
y=velocity;
timer=0;
}
else if (timer++ >= (60*5)) /* 5 second timeout */
{
x=x_save;
y=y_save;
if (!x_save)
{
x=_gs_random(3)+2;
if (_gs_random(100) < 50)
x*=-1;
x_save=x;
}
else if (_gs_random(1000) < 10)
{
x=_gs_random(3)+2;
if (_gs_random(100) < 50)
x*=-1;
x_save=x;
}
if (!y_save)
{
y=_gs_random(2)+2;
if (_gs_random(100) < 50)
y*=-1;
y_save=y;
}
else if (_gs_random(1000) < 10)
{
y=_gs_random(2)+2;
if (_gs_random(100) < 50)
y*=-1;
y_save=y;
}
}
if (x || y)
{
x2=x;
y2=y;
diff=vp.xoff+x;
if (diff < 0)
x=(BMWIDTH>>1)+x;
else if ((diff+vp.width) >= BMWIDTH)
x=-((BMWIDTH>>1)-x);
diff=vp.yoff+y;
if (diff < 0)
y=(BMHEIGHT>>1)+y;
else if ((diff+vp.height) >= BMHEIGHT)
y=-((BMHEIGHT>>1)-y);
gs_scroll_vp_pf1(&display,0,x,y,1); /* scroll viewport 0, synchronize */
x=x2>>1;
y=y2>>1;
diff=vp.xoff2+x;
if (diff < 0)
x=(BMWIDTH>>1)+x;
else if ((diff+vp.width) >= BMWIDTH)
x=-((BMWIDTH>>1)-x);
diff=vp.yoff2+y;
if (diff < 0)
y=(BMHEIGHT>>1)+y;
else if ((diff+vp.height) >= BMHEIGHT)
y=-((BMHEIGHT>>1)-y);
gs_scroll_vp_pf2(&display,0,x,y,1); /* scroll viewport 0, synchronize */
}
}
/***************************************************************************/
int setup()
{
loadpic.bitmap1=NULL; /* no bitmap to fill. NOTE: this will cause an error return */
loadpic.bitmap2=NULL; /* but the color table is still filled */
loadpic.file="gfx/pf1.pic";
gs_get_ILBM_bm(&loadpic); /* get color table */
loadpic.file="gfx/pf2.pic";
loadpic.color_table=&color[16]; /* load 2nd playfield colors */
loadpic.num_colors=16; /* must reset after each load */
gs_get_ILBM_bm(&loadpic); /* get color table */
loadpic.file="gfx/dashboard.brush";
loadpic.color_table=&color[32]; /* load 2nd viewport colors */
loadpic.num_colors=16; /* must reset after each load */
gs_get_ILBM_bm(&loadpic); /* get color table */
#ifdef NTSC_MONITOR_ID
display.modes = NTSC_MONITOR_ID;
#endif
if (gs_create_display(&display))
{
return(-1);
}
loadpic.flags=0; /* don't load color table */
loadpic.file="gfx/pf1.pic";
loadpic.bitmap1=vp.bitmap1; /* address of bitmap to fill */
loadpic.fill=PF1_PLANES;
gs_loadILBM(&loadpic); /* load the picture! */
loadpic.file="gfx/pf2.pic";
loadpic.fill=PF2_PLANES;
gs_loadILBM(&loadpic); /* load the picture! */
loadpic.file="gfx/dashboard.brush";
loadpic.bitmap1=vp2.bitmap1; /* address of bitmap to fill */
loadpic.fill=ALL_PLANES;;
gs_loadILBM(&loadpic); /* load the picture! */
scroller=gs_add_vb_server(&scroll,0);
if (!scroller)
{
gs_remove_display(&display);
return(-2);
}
gs_show_display(&display,1); /* show the display */
return(0);
}
/***************************************************************************/
int check_close()
/* check for user input */
{
if (gs_joystick(0) & JOY_BUTTON1)
return(1);
return(0);
}
/***************************************************************************/
void cleanup()
/* release all resources and memory */
{
if (scroller)
gs_remove_vb_server(scroller);
gs_remove_display(&display);
}