// license:BSD-3-Clause
// copyright-holders:Zsolt Vasvari
/***************************************************************************
Exidy Car Polo hardware
driver by Zsolt Vasvari
****************************************************************************/
#include "emu.h"
#include "includes/carpolo.h"
/* the screen elements' priorties determine their color */
#define CHARSET_COLOR_BASE (0x00)
#define BACKGROUND_PEN ((0x00 << 1) + 1)
#define FIELD_PEN ((0x01 << 1) + 1)
#define CAR1_COLOR (0x02)
#define LINE_PEN ((0x03 << 1) + 1)
#define CAR4_COLOR (0x04)
#define CAR3_COLOR (0x05)
#define CAR2_COLOR (0x06)
#define BALL_COLOR (0x07)
#define NET_COLOR (0x08)
#define LEFT_GOAL_COLOR (0x09)
#define LEFT_GOAL_PEN (0x18 + 0x08)
#define LEFT_SCORE_PEN (0x18 + 0x06)
#define RIGHT_GOAL_COLOR (0x0a)
#define RIGHT_GOAL_PEN (0x18 + 0x18)
#define RIGHT_SCORE_PEN (0x18 + 0x16)
#define SPECIAL_CHAR_COLOR (0x0b)
#define ALPHA_COLOR_BASE (0x0c) /* 0x0c - 0x0f */
#define SPRITE_WIDTH (16)
#define SPRITE_HEIGHT (16)
#define GOAL_WIDTH (16)
#define GOAL_HEIGHT (64)
#define LEFT_GOAL_X ((2 * 16) - 8)
#define RIGHT_GOAL_X ((13 * 16) - 8)
#define GOAL_Y (7 * 16)
#define TOP_BORDER (16)
#define BOTTOM_BORDER (255)
#define LEFT_BORDER (0)
#define RIGHT_BORDER (239)
/***************************************************************************
*
* Palette generation
*
* The palette PROM is connected to the RGB output this way.
*
* bit 0 -- 220 ohm resistor -- BLUE (probably an error on schematics)
* -- 470 ohm resistor -- BLUE (probably an error on schematics)
* -- 220 ohm resistor -- GREEN
* -- 470 ohm resistor -- GREEN
* -- 1 kohm resistor -- GREEN
* -- 220 ohm resistor -- RED
* -- 470 ohm resistor -- RED
* bit 7 -- 1 kohm resistor -- RED
*
**************************************************************************/
void carpolo_state::carpolo_palette(palette_device &palette) const
{
uint8_t const *const color_prom = memregion("proms")->base();
/* thanks to Jarek Burczynski for analyzing the circuit */
/* static const float MAX_VOLTAGE = 6.9620f; */
static constexpr float MIN_VOLTAGE = 1.7434f;
static constexpr float MAX_VOLTAGE = 5.5266f;
static constexpr float r_voltage[] =
{
1.7434f, 2.1693f, 2.5823f, 3.0585f, 3.4811f, 4.0707f, 4.7415f, 5.4251f
};
static constexpr float g_voltage[] =
{
1.7434f, 2.1693f, 2.5823f, 3.0585f, 3.4811f, 4.0707f, 4.7415f, 5.4251f
/* 4.7871f, 5.0613f, 5.3079f, 5.6114f, 5.7940f, 6.1608f, 6.5436f, 6.9620f */
};
static constexpr float b_voltage[] =
{
1.9176f, 2.8757f, 3.9825f, 5.5266f
};
for (int i = 0; i < palette.entries(); i++)
{
uint8_t pen;
if (i < 0x18)
{
/* sprites */
pen = ((i - 0x00) & 0x01) ? CHARSET_COLOR_BASE + ((i - 0x00) >> 1) : 0;
}
else if (i < 0x38)
{
/* the bits in the goal gfx PROM are hooked up as follows (all active LO):
D3 - goal post
D2 - scoring area
D1 - net
D0 - n/c
I am only filling in the colors actually used. */
switch (i - 0x18)
{
case (0x00 | (0x07 ^ 0x0f)): pen = LEFT_GOAL_COLOR; break;
case (0x00 | (0x0d ^ 0x0f)): pen = NET_COLOR; break;
case (0x00 | (0x09 ^ 0x0f)): pen = NET_COLOR; break; // score
case (0x10 | (0x07 ^ 0x0f)): pen = RIGHT_GOAL_COLOR; break;
case (0x10 | (0x0d ^ 0x0f)): pen = NET_COLOR; break;
case (0x10 | (0x09 ^ 0x0f)): pen = NET_COLOR; break; // score
default: pen = 0; break;
}
}
else
{
/* alpha layer */
pen = ((i - 0x38) & 0x01) ? ALPHA_COLOR_BASE + ((i - 0x38) >> 1) : 0;
}
const uint8_t r = ((r_voltage[(color_prom[pen] >> 5) & 0x07] - MIN_VOLTAGE) / (MAX_VOLTAGE - MIN_VOLTAGE)) * 255.0f;
const uint8_t g = ((g_voltage[(color_prom[pen] >> 2) & 0x07] - MIN_VOLTAGE) / (MAX_VOLTAGE - MIN_VOLTAGE)) * 255.0f;
const uint8_t b = ((b_voltage[(color_prom[pen] >> 0) & 0x03] - MIN_VOLTAGE) / (MAX_VOLTAGE - MIN_VOLTAGE)) * 255.0f;
palette.set_pen_color(i, rgb_t(r, g, b));
}
}
/*************************************
*
* Video system start
*
*************************************/
void carpolo_state::video_start()
{
m_sprite_sprite_collision_bitmap1 = std::make_unique<bitmap_ind16>(SPRITE_WIDTH*2, SPRITE_HEIGHT*2);
m_sprite_sprite_collision_bitmap2 = std::make_unique<bitmap_ind16>(SPRITE_WIDTH*2, SPRITE_HEIGHT*2);
m_sprite_goal_collision_bitmap1 = std::make_unique<bitmap_ind16>(SPRITE_WIDTH+GOAL_WIDTH, SPRITE_HEIGHT+GOAL_HEIGHT);
m_sprite_goal_collision_bitmap2 = std::make_unique<bitmap_ind16>(SPRITE_WIDTH+GOAL_WIDTH, SPRITE_HEIGHT+GOAL_HEIGHT);
m_sprite_border_collision_bitmap = std::make_unique<bitmap_ind16>(SPRITE_WIDTH, SPRITE_HEIGHT);
save_item(NAME(*m_sprite_sprite_collision_bitmap1));
save_item(NAME(*m_sprite_sprite_collision_bitmap2));
save_item(NAME(*m_sprite_goal_collision_bitmap1));
save_item(NAME(*m_sprite_goal_collision_bitmap2));
save_item(NAME(*m_sprite_border_collision_bitmap));
}
/*************************************
*
* Core video refresh
*
*************************************/
void carpolo_state::draw_alpha_line(bitmap_ind16 &bitmap, const rectangle &cliprect,
int alpha_line, int video_line)
{
for (int x = 0; x < 32; x++)
{
uint8_t code, col;
code = m_alpharam[alpha_line * 32 + x] >> 2;
col = m_alpharam[alpha_line * 32 + x] & 0x03;
m_gfxdecode->gfx(2)->transpen(bitmap,cliprect,
code,col,
0,0,
x*8,video_line*8,0);
}
}
void carpolo_state::remap_sprite_code(int bank, int code, int *remapped_code, int *flipy)
{
const uint8_t data = m_user1->base()[code | (bank << 4)];
*remapped_code = data & 0x0f;
*flipy = BIT(data, 4);
}
void carpolo_state::draw_sprite(bitmap_ind16 &bitmap, const rectangle &cliprect,
uint8_t x, uint8_t y, int bank, int code, int col)
{
int remapped_code, flipy;
remap_sprite_code(bank, code, &remapped_code, &flipy);
x = 240 - x;
y = 240 - y;
m_gfxdecode->gfx(0)->transpen(bitmap, cliprect, remapped_code, col, 0, flipy, x, y, 0);
/* draw with wrap around */
m_gfxdecode->gfx(0)->transpen(bitmap, cliprect, remapped_code, col, 0, flipy, (int16_t)x - 256, y, 0);
}
uint32_t carpolo_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
/* draw the playfield elements in the correct priority order */
/* score area - position determined by bit 4 of the vertical timing PROM */
bitmap.plot_box(0,0,RIGHT_BORDER+1,TOP_BORDER,BACKGROUND_PEN);
/* field */
bitmap.plot_box(0,TOP_BORDER,RIGHT_BORDER+1,BOTTOM_BORDER-TOP_BORDER+1,FIELD_PEN);
/* car 1 */
draw_sprite(bitmap, cliprect,
m_spriteram[0x00], m_spriteram[0x01],
0, m_spriteram[0x0c] & 0x0f, CAR1_COLOR);
/* border - position determined by bit 4 and 7 of the vertical timing PROM */
bitmap.plot_box(0,TOP_BORDER, RIGHT_BORDER+1,1,LINE_PEN);
bitmap.plot_box(0,BOTTOM_BORDER,RIGHT_BORDER+1,1,LINE_PEN);
bitmap.plot_box(LEFT_BORDER,TOP_BORDER, 1,BOTTOM_BORDER-TOP_BORDER+1,LINE_PEN);
bitmap.plot_box(RIGHT_BORDER,TOP_BORDER,1,BOTTOM_BORDER-TOP_BORDER+1,LINE_PEN);
/* car 4 */
draw_sprite(bitmap, cliprect, m_spriteram[0x06], m_spriteram[0x07], 0, m_spriteram[0x0d] >> 4, CAR4_COLOR);
/* car 3 */
draw_sprite(bitmap, cliprect, m_spriteram[0x04], m_spriteram[0x05], 0, m_spriteram[0x0d] & 0x0f, CAR3_COLOR);
/* car 2 */
draw_sprite(bitmap, cliprect, m_spriteram[0x02], m_spriteram[0x03], 0, m_spriteram[0x0c] >> 4, CAR2_COLOR);
/* ball */
draw_sprite(bitmap, cliprect, m_spriteram[0x08], m_spriteram[0x09], 1, m_spriteram[0x0e] & 0x0f, BALL_COLOR);
/* left goal - position determined by bit 6 of the
horizontal and vertical timing PROMs */
m_gfxdecode->gfx(1)->zoom_transpen(bitmap, cliprect, 0, 0, 0, 0, LEFT_GOAL_X, GOAL_Y, 0x20000, 0x20000, 0);
/* right goal */
m_gfxdecode->gfx(1)->zoom_transpen(bitmap, cliprect, 0, 1, 1, 0, RIGHT_GOAL_X, GOAL_Y, 0x20000, 0x20000, 0);
/* special char - bit 0 of 0x0f enables it,
bit 1 marked as WIDE, but never appears to be set */
if (m_spriteram[0x0f] & 0x02)
popmessage("WIDE!\n");
if (m_spriteram[0x0f] & 0x01)
draw_sprite(bitmap, cliprect, m_spriteram[0x0a], m_spriteram[0x0b], 1, m_spriteram[0x0e] >> 4, SPECIAL_CHAR_COLOR);
/* draw the alpha layer */
/* there are only 8 lines of text repeated 4 times
and bit 3 of the vertical timing PROM controls in
which quadrant the line will actually appear */
draw_alpha_line(bitmap, cliprect, 0, (0*4+0)*2 );
draw_alpha_line(bitmap, cliprect, 1, (0*4+0)*2+1);
draw_alpha_line(bitmap, cliprect, 2, (3*4+1)*2 );
draw_alpha_line(bitmap, cliprect, 3, (3*4+1)*2+1);
draw_alpha_line(bitmap, cliprect, 4, (1*4+2)*2 );
draw_alpha_line(bitmap, cliprect, 5, (1*4+2)*2+1);
draw_alpha_line(bitmap, cliprect, 6, (0*4+3)*2 );
draw_alpha_line(bitmap, cliprect, 7, (0*4+3)*2+1);
return 0;
}
/*************************************
*
* End of frame callback
*
*************************************/
void carpolo_state::normalize_coordinates(int *x1, int *y1, int *x2, int *y2)
{
if (*x1 < *x2)
{
*x2 = *x2 - *x1;
*x1 = 0;
}
else
{
*x1 = *x1 - *x2;
*x2 = 0;
}
if (*y1 < *y2)
{
*y2 = *y2 - *y1;
*y1 = 0;
}
else
{
*y1 = *y1 - *y2;
*y2 = 0;
}
}
int carpolo_state::check_sprite_sprite_collision(int x1, int y1, int code1, int flipy1,
int x2, int y2, int code2, int flipy2,
int *col_x, int *col_y)
{
int collided = 0;
x1 = 240 - x1;
y1 = 240 - y1;
x2 = 240 - x2;
y2 = 240 - y2;
/* check if the two sprites are even within collision range */
if ((abs(x1 - x2) < SPRITE_WIDTH) && (abs(y1 - y2) < SPRITE_HEIGHT))
{
int x,y;
normalize_coordinates(&x1, &y1, &x2, &y2);
m_sprite_sprite_collision_bitmap1->fill(0);
m_sprite_sprite_collision_bitmap2->fill(0);
m_gfxdecode->gfx(0)->opaque(*m_sprite_sprite_collision_bitmap1,m_sprite_sprite_collision_bitmap1->cliprect(),
code1,0,
0,flipy1,
x1,y1);
m_gfxdecode->gfx(0)->opaque(*m_sprite_sprite_collision_bitmap2,m_sprite_sprite_collision_bitmap2->cliprect(),
code2,0,
0,flipy2,
x2,y2);
for (x = x1; x < x1 + SPRITE_WIDTH; x++)
for (y = y1; y < y1 + SPRITE_HEIGHT; y++)
if ((m_sprite_sprite_collision_bitmap1->pix16(y, x) == 1) &&
(m_sprite_sprite_collision_bitmap2->pix16(y, x) == 1))
{
*col_x = (x1 + x) & 0x0f;
*col_y = (y1 + y) & 0x0f;
collided = 1;
break;
}
}
return collided;
}
/* returns 1 for collision with goal post,
2 for collision with scoring area */
int carpolo_state::check_sprite_left_goal_collision(int x1, int y1, int code1, int flipy1, int goalpost_only)
{
int collided = 0;
x1 = 240 - x1;
y1 = 240 - y1;
/* check if the sprite is even within the range of the goal */
if (((y1 + 16) > GOAL_Y) && (y1 < (GOAL_Y + GOAL_HEIGHT)) &&
((x1 + 16) > LEFT_GOAL_X) && (x1 < (LEFT_GOAL_X + GOAL_WIDTH)))
{
int x,y;
int x2,y2;
x2 = LEFT_GOAL_X;
y2 = GOAL_Y;
normalize_coordinates(&x1, &y1, &x2, &y2);
m_sprite_goal_collision_bitmap1->fill(0);
m_sprite_goal_collision_bitmap2->fill(0);
m_gfxdecode->gfx(0)->opaque(*m_sprite_goal_collision_bitmap1,m_sprite_goal_collision_bitmap1->cliprect(),
code1,0,
0,flipy1,
x1,y1);
m_gfxdecode->gfx(1)->zoom_transpen(*m_sprite_goal_collision_bitmap2,m_sprite_goal_collision_bitmap2->cliprect(),
0,0,
0,0,
x2,y2,
0x20000,0x20000,0);
for (x = x1; x < x1 + SPRITE_WIDTH; x++)
for (y = y1; y < y1 + SPRITE_HEIGHT; y++)
if (m_sprite_goal_collision_bitmap1->pix16(y, x) == 1)
{
pen_t pix = m_sprite_goal_collision_bitmap2->pix16(y, x);
if (pix == LEFT_GOAL_PEN)
{
collided = 1;
break;
}
if (!goalpost_only && (pix == LEFT_SCORE_PEN))
{
collided = 2;
break;
}
}
}
return collided;
}
int carpolo_state::check_sprite_right_goal_collision(int x1, int y1, int code1, int flipy1, int goalpost_only)
{
int collided = 0;
x1 = 240 - x1;
y1 = 240 - y1;
/* check if the sprite is even within the range of the goal */
if (((y1 + 16) > GOAL_Y) && (y1 < (GOAL_Y + GOAL_HEIGHT)) &&
((x1 + 16) > RIGHT_GOAL_X) && (x1 < (RIGHT_GOAL_X + GOAL_WIDTH)))
{
int x,y;
int x2,y2;
x2 = RIGHT_GOAL_X;
y2 = GOAL_Y;
normalize_coordinates(&x1, &y1, &x2, &y2);
m_sprite_goal_collision_bitmap1->fill(0);
m_sprite_goal_collision_bitmap2->fill(0);
m_gfxdecode->gfx(0)->opaque(*m_sprite_goal_collision_bitmap1,m_sprite_goal_collision_bitmap1->cliprect(),
code1,0,
0,flipy1,
x1,y1);
m_gfxdecode->gfx(1)->zoom_transpen(*m_sprite_goal_collision_bitmap2,m_sprite_goal_collision_bitmap2->cliprect(),
0,1,
1,0,
x2,y2,
0x20000,0x20000,0);
for (x = x1; x < x1 + SPRITE_WIDTH; x++)
for (y = y1; y < y1 + SPRITE_HEIGHT; y++)
if (m_sprite_goal_collision_bitmap1->pix16(y, x) == 1)
{
pen_t pix = m_sprite_goal_collision_bitmap2->pix16(y, x);
if (pix == RIGHT_GOAL_PEN)
{
collided = 1;
break;
}
if (!goalpost_only && (pix == RIGHT_SCORE_PEN))
{
collided = 2;
break;
}
}
}
return collided;
}
/* returns 1 for collision with vertical border,
2 for collision with horizontal border */
int carpolo_state::check_sprite_border_collision(uint8_t x1, uint8_t y1, int code1, int flipy1)
{
uint8_t x,y;
int collided = 0;
x1 = 240 - x1;
y1 = 240 - y1;
m_gfxdecode->gfx(0)->opaque(*m_sprite_border_collision_bitmap,m_sprite_border_collision_bitmap->cliprect(),
code1,0,
0,flipy1,
0,0);
for (x = 0; x < SPRITE_WIDTH; x++)
for (y = 0; y < SPRITE_HEIGHT; y++)
if (m_sprite_border_collision_bitmap->pix16(y, x) == 1)
{
if (((uint8_t)(x1 + x) == LEFT_BORDER) ||
((uint8_t)(x1 + x) == RIGHT_BORDER))
{
collided = 1;
break;
}
if (((uint8_t)(y1 + y) == TOP_BORDER) ||
((uint8_t)(y1 + y) == BOTTOM_BORDER))
{
collided = 2;
break;
}
}
return collided;
}
WRITE_LINE_MEMBER(carpolo_state::screen_vblank)
{
// rising edge
if (state)
{
/* handle the 60hz timer now (machine/carpolo.cpp) */
timer_tick();
/* sprites collision detection */
int col_x, col_y;
int car1_x, car2_x, car3_x, car4_x, ball_x;
int car1_y, car2_y, car3_y, car4_y, ball_y;
int car1_code, car2_code, car3_code, car4_code, ball_code;
int car1_flipy, car2_flipy, car3_flipy, car4_flipy, ball_flipy;
/* check car-car collision first */
car1_x = m_spriteram[0x00];
car1_y = m_spriteram[0x01];
remap_sprite_code(0, m_spriteram[0x0c] & 0x0f, &car1_code, &car1_flipy);
car2_x = m_spriteram[0x02];
car2_y = m_spriteram[0x03];
remap_sprite_code(0, m_spriteram[0x0c] >> 4, &car2_code, &car2_flipy);
car3_x = m_spriteram[0x04];
car3_y = m_spriteram[0x05];
remap_sprite_code(0, m_spriteram[0x0d] & 0x0f, &car3_code, &car3_flipy);
car4_x = m_spriteram[0x06];
car4_y = m_spriteram[0x07];
remap_sprite_code(0, m_spriteram[0x0d] >> 4, &car4_code, &car4_flipy);
ball_x = m_spriteram[0x08];
ball_y = m_spriteram[0x09];
remap_sprite_code(1, m_spriteram[0x0e] & 0x0f, &ball_code, &ball_flipy);
/* cars 1 and 2 */
if (check_sprite_sprite_collision(car1_x, car1_y, car1_code, car1_flipy,
car2_x, car2_y, car2_code, car2_flipy,
&col_x, &col_y))
generate_car_car_interrupt(0, 1);
/* cars 1 and 3 */
else if (check_sprite_sprite_collision(car1_x, car1_y, car1_code, car1_flipy,
car3_x, car3_y, car3_code, car3_flipy,
&col_x, &col_y))
generate_car_car_interrupt(0, 2);
/* cars 1 and 4 */
else if (check_sprite_sprite_collision(car1_x, car1_y, car1_code, car1_flipy,
car4_x, car4_y, car4_code, car4_flipy,
&col_x, &col_y))
generate_car_car_interrupt(0, 3);
/* cars 2 and 3 */
else if (check_sprite_sprite_collision(car2_x, car2_y, car2_code, car2_flipy,
car3_x, car3_y, car3_code, car3_flipy,
&col_x, &col_y))
generate_car_car_interrupt(1, 2);
/* cars 2 and 4 */
else if (check_sprite_sprite_collision(car2_x, car2_y, car2_code, car2_flipy,
car4_x, car4_y, car4_code, car4_flipy,
&col_x, &col_y))
generate_car_car_interrupt(1, 3);
/* cars 3 and 4 */
else if (check_sprite_sprite_collision(car3_x, car3_y, car3_code, car3_flipy,
car4_x, car4_y, car4_code, car4_flipy,
&col_x, &col_y))
generate_car_car_interrupt(2, 3);
/* check car-ball collision */
if (check_sprite_sprite_collision(car1_x, car1_y, car1_code, car1_flipy,
ball_x, ball_y, ball_code, ball_flipy,
&col_x, &col_y))
generate_car_ball_interrupt(0, col_x, col_y);
else if (check_sprite_sprite_collision(car2_x, car2_y, car2_code, car2_flipy,
ball_x, ball_y, ball_code, ball_flipy,
&col_x, &col_y))
generate_car_ball_interrupt(1, col_x, col_y);
else if (check_sprite_sprite_collision(car3_x, car3_y, car3_code, car3_flipy,
ball_x, ball_y, ball_code, ball_flipy,
&col_x, &col_y))
generate_car_ball_interrupt(2, col_x, col_y);
else if (check_sprite_sprite_collision(car4_x, car4_y, car4_code, car4_flipy,
ball_x, ball_y, ball_code, ball_flipy,
&col_x, &col_y))
generate_car_ball_interrupt(3, col_x, col_y);
/* check car-goal collision */
if (check_sprite_left_goal_collision(car1_x, car1_y, car1_code, car1_flipy, 1))
generate_car_goal_interrupt(0, 0);
else if (check_sprite_right_goal_collision(car1_x, car1_y, car1_code, car1_flipy, 1))
generate_car_goal_interrupt(0, 1);
else if (check_sprite_left_goal_collision(car2_x, car2_y, car2_code, car2_flipy, 1))
generate_car_goal_interrupt(1, 0);
else if (check_sprite_right_goal_collision(car2_x, car2_y, car2_code, car2_flipy, 1))
generate_car_goal_interrupt(1, 1);
else if (check_sprite_left_goal_collision(car3_x, car3_y, car3_code, car3_flipy, 1))
generate_car_goal_interrupt(2, 0);
else if (check_sprite_right_goal_collision(car3_x, car3_y, car3_code, car3_flipy, 1))
generate_car_goal_interrupt(2, 1);
else if (check_sprite_left_goal_collision(car4_x, car4_y, car4_code, car4_flipy, 1))
generate_car_goal_interrupt(3, 0);
else if (check_sprite_right_goal_collision(car4_x, car4_y, car4_code, car4_flipy, 1))
generate_car_goal_interrupt(3, 1);
/* check ball collision with static screen elements */
{
int col = check_sprite_left_goal_collision(ball_x, ball_y, ball_code, ball_flipy, 0);
if (col == 1) generate_ball_screen_interrupt(0x05);
if (col == 2) generate_ball_screen_interrupt(0x03);
col = check_sprite_right_goal_collision(ball_x, ball_y, ball_code, ball_flipy, 0);
if (col == 1) generate_ball_screen_interrupt(0x05 | 0x08);
if (col == 2) generate_ball_screen_interrupt(0x03 | 0x08);
if (check_sprite_border_collision(ball_x, ball_y, ball_code, ball_flipy))
generate_ball_screen_interrupt(0x06);
}
/* check car-border collision */
{
int col = check_sprite_border_collision(car1_x, car1_y, car1_code, car1_flipy);
if (col)
generate_car_border_interrupt(0, (col == 2));
else
{
col = check_sprite_border_collision(car2_x, car2_y, car2_code, car2_flipy);
if (col)
generate_car_border_interrupt(1, (col == 2));
else
{
col = check_sprite_border_collision(car3_x, car3_y, car3_code, car3_flipy);
if (col)
generate_car_border_interrupt(2, (col == 2));
else
{
col = check_sprite_border_collision(car4_x, car4_y, car4_code, car4_flipy);
if (col)
generate_car_border_interrupt(3, (col == 2));
}
}
}
}
}
}