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update.c
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update.c
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#include "update.h"
#include "constants.h"
#include "macros.h"
#include "neslib.h"
extern unsigned char spr;
#pragma zpsym("spr")
extern unsigned char i;
#pragma zpsym("i")
extern unsigned char teleport_state;
#pragma zpsym("teleport_state")
extern unsigned char teleport_timer;
#pragma zpsym("teleport_timer")
extern unsigned char sec;
#pragma zpsym("sec")
extern unsigned char blue_door_state;
#pragma zpsym("blue_door_state")
extern unsigned char yellow_door_state;
#pragma zpsym("yellow_door_state")
extern unsigned char a;
#pragma zpsym("a")
extern unsigned char b;
#pragma zpsym("b")
extern unsigned char c;
#pragma zpsym("c")
extern unsigned char frame_cnt;
#pragma zpsym("frame_cnt");
extern const unsigned char* metasprite_list[];
extern unsigned char score0[7];
extern unsigned char score1[7];
extern unsigned char score2[7];
extern unsigned char update_buffer[80];
extern const unsigned char metasprite_animation_data[];
extern unsigned char stamp_x[8]; // Stamp X position
#pragma zpsym("stamp_x")
extern unsigned char stamp_y[8]; // Stamp Y position
#pragma zpsym("stamp_y")
extern unsigned char stamp_type[8]; // Stamp type
#pragma zpsym("stamp_type")
extern unsigned char stamp_state[8]; // Stamp state
#pragma zpsym("stamp_state")
extern unsigned char stamp_last_state[8]; // Stamp last state
#pragma zpsym("stamp_last_state")
extern unsigned char stamp_frame[8]; // Stamp frame
#pragma zpsym("stamp_frame")
extern unsigned char stamp_delay[8]; // Stamp delay
#pragma zpsym("stamp_delay")
extern unsigned char stamp_timer[8]; // Stamp timer
#pragma zpsym("stamp_timer")
extern unsigned char stamp_pad[8]; // Stamp pad
#pragma zpsym("stamp_pad")
extern unsigned char stamp_shooting[8]; // Stamp shooting
#pragma zpsym("stamp_shooting")
extern unsigned char stamp_move_delay[8]; // Stamp move delay.
#pragma zpsym("stamp_move_delay")
extern unsigned char laser_x[8]; // Laser X position
#pragma zpsym("laser_x")
extern unsigned char laser_y[8]; // Laser Y position
#pragma zpsym("laser_y")
extern unsigned char laser_type[8]; // Laser type
#pragma zpsym("laser_type")
extern unsigned char laser_shooting[8]; // Laser shooting
#pragma zpsym("laser_shooting")
extern unsigned char laser_direction[8]; // Laser direction
#pragma zpsym("laser_direction")
extern unsigned char laser_offset_x[8]; // Laser X offset
#pragma zpsym("laser_offset_x")
extern unsigned char laser_offset_y[8]; // Laser Y offset
#pragma zpsym("laser_offset_y")
extern unsigned char stamp_type_to_radar(unsigned int t);
extern void clear_update_buffer(void);
extern unsigned char is_stamp_visible(void);
/**
* update_radar()
* a = the current update buffer subscript
* b = the box X to check with get_radar_tile_byte()
* c = the box Y to check with get_radar_tile_byte()
*/
void update_radar(void)
{
for (i=2;i<STAMP_NUM_SLOTS;i++)
{
if (stamp_state[i]==STATE_DEAD)
spr=oam_spr(0xff,0xff,0xff,0xff,spr);
else
spr = oam_spr(STAMP_X_TO_RADAR(stamp_x[i]),STAMP_Y_TO_RADAR(stamp_y[i]),stamp_type_to_radar(stamp_type[i]),0,spr);
}
}
/**
* update_teleport_timer()
*/
void update_teleport_timer(void)
{
if (teleport_state==CLOSED)
{
if (teleport_timer==0)
teleport_state=OPEN;
else if (sec==0)
teleport_timer--;
}
else if (teleport_state==OPEN)
{
// don't do anything...yet.
}
else
{
teleport_state=OPEN;
}
}
/**
* set_teleport(openclose)
* openclose = 0 for open, 1 for close
*/
void set_teleport(unsigned char openclose)
{
// Clear the update buffer
clear_update_buffer();
// Set the addresses for the two teleport regions.
update_buffer[0]=MSB(NTADR_A(1,8))|NT_UPD_VERT;
update_buffer[1]=LSB(NTADR_A(1,8));
update_buffer[2]=3;
update_buffer[6]=MSB(NTADR_A(30,8))|NT_UPD_VERT;
update_buffer[7]=LSB(NTADR_A(30,8));
update_buffer[8]=3;
// and fill in the tiles in the data section.
update_buffer[3]=(openclose==0?0x73:0x79);
update_buffer[4]=(openclose==0?0x73:0x79);
update_buffer[5]=(openclose==0?0x73:0x79);
update_buffer[9]=(openclose==0?0x78:0x7A);
update_buffer[10]=(openclose==0?0x78:0x7A);
update_buffer[11]=(openclose==0?0x78:0x7A);
}
/**
* set_doors()
*/
void update_doors()
{
// Clear the update buffer
clear_update_buffer();
// Update VRAM reflecting door states, two rows, two sets of 3 tiles each row.
update_buffer[0]=MSB(NTADR_A(1,19))|NT_UPD_HORZ;
update_buffer[1]=LSB(NTADR_A(1,19));
update_buffer[2]=3;
update_buffer[3]=(blue_door_state==0?0x65:0x76);
update_buffer[4]=(blue_door_state==0?0x00:0x64);
update_buffer[5]=(blue_door_state==0?0x00:0x64);
update_buffer[6]=MSB(NTADR_A(28,19))|NT_UPD_HORZ;
update_buffer[7]=LSB(NTADR_A(28,19));
update_buffer[8]=3;
update_buffer[9]=(yellow_door_state==0?0x00:0x64);
update_buffer[10]=(yellow_door_state==0?0x00:0x64);
update_buffer[11]=(yellow_door_state==0?0x66:0x77);
update_buffer[12]=MSB(NTADR_A(1,20))|NT_UPD_HORZ;
update_buffer[13]=LSB(NTADR_A(1,20));
update_buffer[14]=3;
update_buffer[15]=(blue_door_state==0?0x61:0x67);
update_buffer[16]=(blue_door_state==0?0x00:0x63);
update_buffer[17]=(blue_door_state==0?0x00:0x63);
update_buffer[18]=MSB(NTADR_A(28,20))|NT_UPD_HORZ;
update_buffer[19]=LSB(NTADR_A(28,20));
update_buffer[20]=3;
update_buffer[21]=(yellow_door_state==0?0x00:0x62);
update_buffer[22]=(yellow_door_state==0?0x00:0x62);
update_buffer[23]=(yellow_door_state==0?0x60:0x68);
}
/**
* update_scores() - Update the score data for both players
*/
void update_scores(void)
{
// Clear the update buffer
clear_update_buffer();
// Set the addresses for the update regions.
update_buffer[0]=MSB(NTADR_A(2,25))|NT_UPD_HORZ; // Blue player Line 1
update_buffer[1]=LSB(NTADR_A(2,25));
update_buffer[2]=7;
update_buffer[10]=MSB(NTADR_A(2,26))|NT_UPD_HORZ; // Blue player Line 2
update_buffer[11]=LSB(NTADR_A(2,26));
update_buffer[12]=7;
update_buffer[20]=MSB(NTADR_A(23,25))|NT_UPD_HORZ; // Yellow player Line 1
update_buffer[21]=LSB(NTADR_A(23,25));
update_buffer[22]=7;
update_buffer[30]=MSB(NTADR_A(23,26))|NT_UPD_HORZ; // Yellow player Line 2
update_buffer[31]=LSB(NTADR_A(23,26));
update_buffer[32]=7;
// and finally, set the data for each.
for (i=0;i<7;++i)
{
update_buffer[i+3]=score1[i];
update_buffer[i+13]=score1[i]+16;
update_buffer[i+23]=score2[i];
update_buffer[i+33]=score2[i]+16;
}
}
/**
* update_box_timers() - Update the box timers, if active
*/
void update_box_timers(void)
{
a=0xff;
clear_update_buffer();
for (i=0;i<2;i++)
{
update_buffer[++a]=MSB(NTADR_A((i==1?5:26),20))|NT_UPD_VERT;
update_buffer[++a]=LSB(NTADR_A((i==1?5:26),20));
update_buffer[++a]=2;
if (stamp_timer[i]>0)
{
update_buffer[++a]=stamp_timer[i];
update_buffer[++a]=stamp_timer[i]+0x10;
}
else
{
update_buffer[++a]=0;
update_buffer[++a]=0;
}
}
}
/**
* update_stamps() - Update the on-screen stamps
*/
void update_stamps(void)
{
spr=OAM_OFFSET_TOP;
oam_clear();
for (i=0;i<STAMP_NUM_SLOTS;i++)
{
if (stamp_move_delay[i]==0)
stamp_move_delay[i]=1;
else
stamp_move_delay[i]--;
if (stamp_state[i]==STATE_DEAD)
{
stamp_x[i]=0xff;
stamp_y[i]=0xff;
a=metasprite_animation_data[92];
b=c=0xff;
spr = oam_meta_spr(b,c,spr,metasprite_list[92]);
}
else if (stamp_state[i]==STATE_DYING)
{
a=metasprite_animation_data[STAMP_TYPE_EXPLOSION+stamp_frame[i]];
b=stamp_x[i];
c=stamp_y[i];
spr = oam_meta_spr(b,c,spr,metasprite_list[a]);
}
else
{
a=metasprite_animation_data[stamp_type[i]+(stamp_state[i]*4)+stamp_frame[i]];
if (is_stamp_visible())
{
b=stamp_x[i];
c=stamp_y[i];
}
else
continue;
spr = oam_meta_spr(b,c,spr,metasprite_list[a]);
}
}
}
/**
* update_lasers() - Update the on-screen lasers
*/
void update_lasers(void)
{
for (i=0;i<LASER_NUM_SLOTS;i++)
{
if (laser_shooting[i]==1)
{
if (laser_type[i]==0)
{
spr = oam_meta_spr(0xFF,0xFF,spr,metasprite_list[92]);
}
else
spr = oam_meta_spr(laser_x[i]+laser_offset_x[i],laser_y[i]+laser_offset_y[i],spr,metasprite_list[laser_type[i]]);
}
else
{
spr = oam_meta_spr(0xFF,0xFF,spr,metasprite_list[92]);
}
}
}