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qpcpp/examples/arm-cortex/vanilla/gnu/game-ev-lm3s811/tunnel.cpp
Quantum Leaps e0f9c36c2f 4.5.01
2012-08-14 18:00:48 -04:00

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//////////////////////////////////////////////////////////////////////////////
// Product: Product: "Fly'n'Shoot" game example
// Last Updated for Version: 4.5.00
// Date of the Last Update: May 20, 2012
//
// Q u a n t u m L e a P s
// ---------------------------
// innovating embedded systems
//
// Copyright (C) 2002-2012 Quantum Leaps, LLC. All rights reserved.
//
// This program is open source software: you can redistribute it and/or
// modify it under the terms of the GNU General Public License as published
// by the Free Software Foundation, either version 2 of the License, or
// (at your option) any later version.
//
// Alternatively, this program may be distributed and modified under the
// terms of Quantum Leaps commercial licenses, which expressly supersede
// the GNU General Public License and are specifically designed for
// licensees interested in retaining the proprietary status of their code.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
// Contact information:
// Quantum Leaps Web sites: http://www.quantum-leaps.com
// http://www.state-machine.com
// e-mail: info@quantum-leaps.com
//////////////////////////////////////////////////////////////////////////////
#include "qp_port.h"
#include "game.h"
#include "bsp.h"
#include <string.h> // for memmove() and memcpy()
Q_DEFINE_THIS_FILE
// Tunnel Active Object ------------------------------------------------------
class Tunnel : public QActive { // extend the QActive class
QTimeEvt m_blinkTimeEvt; // time event for blinking
QTimeEvt m_screenTimeEvt; // time event for screen changes
QHsm *m_mines[GAME_MINES_MAX]; // active mines
QHsm *m_mine1_pool[GAME_MINES_MAX];
QHsm *m_mine2_pool[GAME_MINES_MAX];
uint8_t m_blink_ctr; // blink counter
uint8_t m_last_mine_x;
uint8_t m_last_mine_y;
uint8_t m_wall_thickness_top;
uint8_t m_wall_thickness_bottom;
uint8_t m_minimal_gap;
public:
Tunnel(void);
private: // HSM
static QState initial (Tunnel *me, QEvt const *e);
static QState final (Tunnel *me, QEvt const *e);
static QState active (Tunnel *me, QEvt const *e);
static QState playing (Tunnel *me, QEvt const *e);
static QState demo (Tunnel *me, QEvt const *e);
static QState game_over (Tunnel *me, QEvt const *e);
static QState screen_saver (Tunnel *me, QEvt const *e);
static QState screen_saver_hide(Tunnel *me, QEvt const *e);
static QState screen_saver_show(Tunnel *me, QEvt const *e);
private: // Helper functions
void advance(void);
void plantMine(void);
void addImageAt(uint8_t bmp, uint8_t x, int8_t y);
void dispatchToAllMines(QEvt const *e);
uint8_t isWallHit(uint8_t bmp, uint8_t x_pos, uint8_t y_pos);
};
static void randomSeed(uint32_t seed); // random seed
static uint32_t random(void); // pseudo-random generator
static Tunnel l_tunnel; // the sole instance of the Tunnel active object
// global objects ------------------------------------------------------------
QActive * const AO_Tunnel = &l_tunnel; // opaque pointer to Tunnel
// local objects -------------------------------------------------------------
static uint32_t l_rnd; // random seed
static uint8_t l_walls[GAME_SCREEN_WIDTH * GAME_SCREEN_HEIGHT/8];
static uint8_t l_frame[GAME_SCREEN_WIDTH * GAME_SCREEN_HEIGHT/8];
//............................................................................
Tunnel::Tunnel(void) : QActive((QStateHandler)&Tunnel::initial),
m_blinkTimeEvt(BLINK_TIMEOUT_SIG),
m_screenTimeEvt(SCREEN_TIMEOUT_SIG),
m_last_mine_x(0),
m_last_mine_y(0)
{
for (uint8_t n = 0; n < GAME_MINES_MAX; ++n) {
m_mine1_pool[n] = Mine1_getInst(n); // initialize mine1-type pool
m_mine2_pool[n] = Mine2_getInst(n); // initialize mine2-type pool
m_mines[n] = (QHsm *)0; // mine 'n' is unused
}
}
// HSM definition ------------------------------------------------------------
QState Tunnel::initial(Tunnel *me, QEvt const *) {
for (uint8_t n = 0; n < GAME_MINES_MAX; ++n) {
me->m_mine1_pool[n]->init(); // take the initial tran. for Mine1
me->m_mine2_pool[n]->init(); // take the initial tran. for Mine2
}
randomSeed(1234); // seed the pseudo-random generator
me->subscribe(TIME_TICK_SIG);
me->subscribe(PLAYER_TRIGGER_SIG);
me->subscribe(PLAYER_QUIT_SIG);
QS_OBJ_DICTIONARY(&l_tunnel); // object dictionary for Tunnel object
QS_OBJ_DICTIONARY(&l_tunnel.m_blinkTimeEvt);
QS_OBJ_DICTIONARY(&l_tunnel.m_screenTimeEvt);
QS_FUN_DICTIONARY(&Tunnel::initial); // fun. dictionaries for Tunnel HSM
QS_FUN_DICTIONARY(&Tunnel::final);
QS_FUN_DICTIONARY(&Tunnel::active);
QS_FUN_DICTIONARY(&Tunnel::playing);
QS_FUN_DICTIONARY(&Tunnel::demo);
QS_FUN_DICTIONARY(&Tunnel::game_over);
QS_FUN_DICTIONARY(&Tunnel::screen_saver);
QS_FUN_DICTIONARY(&Tunnel::screen_saver_hide);
QS_FUN_DICTIONARY(&Tunnel::screen_saver_show);
QS_SIG_DICTIONARY(BLINK_TIMEOUT_SIG, &l_tunnel); // local signals
QS_SIG_DICTIONARY(SCREEN_TIMEOUT_SIG, &l_tunnel);
QS_SIG_DICTIONARY(SHIP_IMG_SIG, &l_tunnel);
QS_SIG_DICTIONARY(MISSILE_IMG_SIG, &l_tunnel);
QS_SIG_DICTIONARY(MINE_IMG_SIG, &l_tunnel);
QS_SIG_DICTIONARY(MINE_DISABLED_SIG, &l_tunnel);
QS_SIG_DICTIONARY(EXPLOSION_SIG, &l_tunnel);
QS_SIG_DICTIONARY(SCORE_SIG, &l_tunnel);
return Q_TRAN(&Tunnel::demo);
}
//............................................................................
QState Tunnel::final(Tunnel *me, QEvt const *e) {
switch (e->sig) {
case Q_ENTRY_SIG: {
// clear the screen
memset(l_frame, (uint8_t)0,
(GAME_SCREEN_WIDTH * GAME_SCREEN_HEIGHT/8));
BSP_drawBitmap(l_frame, GAME_SCREEN_WIDTH, GAME_SCREEN_HEIGHT);
QF::stop(); // stop QF and cleanup
return Q_HANDLED();
}
}
return Q_SUPER(&QHsm::top);
}
//............................................................................
QState Tunnel::active(Tunnel *me, QEvt const *e) {
switch (e->sig) {
case MINE_DISABLED_SIG: {
Q_ASSERT((((MineEvt const *)e)->id < GAME_MINES_MAX)
&& (me->m_mines[((MineEvt const *)e)->id] != (QHsm *)0));
me->m_mines[((MineEvt const *)e)->id] = (QHsm *)0;
return Q_HANDLED();
}
case PLAYER_QUIT_SIG: {
return Q_TRAN(&Tunnel::final);
}
}
return Q_SUPER(&QHsm::top);
}
//............................................................................
QState Tunnel::demo(Tunnel *me, QEvt const *e) {
switch (e->sig) {
case Q_ENTRY_SIG: {
me->m_last_mine_x = 0; // last mine at right edge of the tunnel
me->m_last_mine_y = 0;
// set the tunnel properties...
me->m_wall_thickness_top = 0;
me->m_wall_thickness_bottom = 0;
me->m_minimal_gap = GAME_SCREEN_HEIGHT - 3;
// erase the tunnel walls
memset(l_walls, (uint8_t)0,
(GAME_SCREEN_WIDTH * GAME_SCREEN_HEIGHT/8));
me->m_blinkTimeEvt.postEvery(me, BSP_TICKS_PER_SEC/2); // 1/2 sec
me->m_screenTimeEvt.postIn(me, BSP_TICKS_PER_SEC*20); // 20 sec
me->m_blink_ctr = 0; // init the blink counter
return Q_HANDLED();
}
case Q_EXIT_SIG: {
me->m_blinkTimeEvt.disarm();
me->m_screenTimeEvt.disarm();
return Q_HANDLED();
}
case BLINK_TIMEOUT_SIG: {
me->m_blink_ctr ^= 1; // toggle the blink cunter
return Q_HANDLED();
}
case SCREEN_TIMEOUT_SIG: {
return Q_TRAN(&Tunnel::screen_saver);
}
case TIME_TICK_SIG: {
me->advance();
if (me->m_blink_ctr != 0) {
// add the text bitmap into the frame buffer
me->addImageAt(PRESS_BUTTON_BMP,
(GAME_SCREEN_WIDTH - 55)/2,
(GAME_SCREEN_HEIGHT - 8)/2);
}
BSP_drawBitmap(l_frame, GAME_SCREEN_WIDTH, GAME_SCREEN_HEIGHT);
return Q_HANDLED();
}
case PLAYER_TRIGGER_SIG: {
return Q_TRAN(&Tunnel::playing);
}
}
return Q_SUPER(&Tunnel::active);
}
//............................................................................
QState Tunnel::game_over(Tunnel *me, QEvt const *e) {
switch (e->sig) {
case Q_ENTRY_SIG: {
me->m_blinkTimeEvt.postEvery(me, BSP_TICKS_PER_SEC/2); // 1/2 sec
me->m_screenTimeEvt.postIn(me,
BSP_TICKS_PER_SEC*5); // 5 sec
me->m_blink_ctr = 0;
BSP_drawNString((GAME_SCREEN_WIDTH - 6*9)/2, 0, "Game Over");
return Q_HANDLED();
}
case Q_EXIT_SIG: {
me->m_blinkTimeEvt.disarm();
me->m_screenTimeEvt.disarm();
BSP_updateScore(0); // update the score on the display
return Q_HANDLED();
}
case BLINK_TIMEOUT_SIG: {
me->m_blink_ctr ^= 1; // toggle the blink couner
BSP_drawNString((GAME_SCREEN_WIDTH - 6*9)/2, 0,
((me->m_blink_ctr == 0)
? "Game Over"
: " "));
return Q_HANDLED();
}
case SCREEN_TIMEOUT_SIG: {
return Q_TRAN(&Tunnel::demo);
}
}
return Q_SUPER(&Tunnel::active);
}
//............................................................................
QState Tunnel::playing(Tunnel *me, QEvt const *e) {
uint8_t x;
int8_t y;
uint8_t bmp;
switch (e->sig) {
case Q_ENTRY_SIG: {
me->m_minimal_gap = GAME_SCREEN_HEIGHT - 3;
// erase the walls
memset(l_walls, (uint8_t)0,
(GAME_SCREEN_WIDTH * GAME_SCREEN_HEIGHT/8));
static QEvt const takeoff = { TAKE_OFF_SIG, 0 };
AO_Ship->POST(&takeoff, me); // post the TAKEOFF sig
return Q_HANDLED();
}
case Q_EXIT_SIG: {
QEvt recycle;
recycle.sig = MINE_RECYCLE_SIG;
me->dispatchToAllMines(&recycle); // recycle all Mines
return Q_HANDLED();
}
case TIME_TICK_SIG: {
// render this frame on the display
BSP_drawBitmap(l_frame, GAME_SCREEN_WIDTH, GAME_SCREEN_HEIGHT);
me->advance();
me->plantMine();
me->dispatchToAllMines(e);
return Q_HANDLED();
}
case SHIP_IMG_SIG:
case MISSILE_IMG_SIG: {
x = (uint8_t)((ObjectImageEvt const *)e)->x;
y = (int8_t)((ObjectImageEvt const *)e)->y;
bmp = (uint8_t)((ObjectImageEvt const *)e)->bmp;
// did the Ship/Missile hit the tunnel wall?
if (me->isWallHit(bmp, x, y)) {
static QEvt const hit = { HIT_WALL_SIG, 0};
if (e->sig == SHIP_IMG_SIG) {
AO_Ship->POST(&hit, me);
}
else {
AO_Missile->POST(&hit, me);
}
}
me->addImageAt(bmp, x, y);
me->dispatchToAllMines(e); // let Mines check for hits
return Q_HANDLED();
}
case MINE_IMG_SIG:
case EXPLOSION_SIG: {
x = (uint8_t)((ObjectImageEvt const *)e)->x;
y = (int8_t)((ObjectImageEvt const *)e)->y;
bmp = (uint8_t)((ObjectImageEvt const *)e)->bmp;
me->addImageAt(bmp, x, y);
return Q_HANDLED();
}
case SCORE_SIG: {
BSP_updateScore(((ScoreEvt const *)e)->score);
// increase difficulty of the game:
// the tunnel gets narrower as the score goes up
me->m_minimal_gap = GAME_SCREEN_HEIGHT - 3
- ((ScoreEvt const *)e)->score/2000;
return Q_HANDLED();
}
case GAME_OVER_SIG: {
uint16_t score = ((ScoreEvt const *)e)->score;
char str[5];
BSP_updateScore(score);
// clear the screen
memset(l_frame, (uint8_t)0,
(GAME_SCREEN_WIDTH * GAME_SCREEN_HEIGHT/8));
BSP_drawBitmap(l_frame, GAME_SCREEN_WIDTH, GAME_SCREEN_HEIGHT);
// Output the final score to the screen
BSP_drawNString((GAME_SCREEN_WIDTH - 6*10)/2, 1, "Score:");
str[4] = '\0'; // zero-terminate the string
str[3] = '0' + (score % 10); score /= 10;
str[2] = '0' + (score % 10); score /= 10;
str[1] = '0' + (score % 10); score /= 10;
str[0] = '0' + (score % 10);
BSP_drawNString((GAME_SCREEN_WIDTH - 6*10)/2 + 6*6, 1, str);
return Q_TRAN(&Tunnel::game_over);
}
}
return Q_SUPER(&Tunnel::active);
}
//............................................................................
// A random-pixel screen saver to avoid damage to the display
QState Tunnel::screen_saver(Tunnel *me, QEvt const *e) {
switch (e->sig) {
case Q_INIT_SIG: {
return Q_TRAN(&Tunnel::screen_saver_hide);
}
case PLAYER_TRIGGER_SIG: {
return Q_TRAN(&Tunnel::demo);
}
}
return Q_SUPER(&Tunnel::active);
}
//............................................................................
QState Tunnel::screen_saver_hide(Tunnel *me, QEvt const *e) {
switch (e->sig) {
case Q_ENTRY_SIG: {
BSP_displayOff(); // power down the display
me->m_screenTimeEvt.postIn(me, BSP_TICKS_PER_SEC*3); // 3s timeout
return Q_HANDLED();
}
case Q_EXIT_SIG: {
me->m_screenTimeEvt.disarm();
BSP_displayOn(); // power up the display
return Q_HANDLED();
}
case SCREEN_TIMEOUT_SIG: {
return Q_TRAN(&Tunnel::screen_saver_show);
}
}
return Q_SUPER(&Tunnel::screen_saver);
}
//............................................................................
QState Tunnel::screen_saver_show(Tunnel *me, QEvt const *e) {
switch (e->sig) {
case Q_ENTRY_SIG: {
// clear the screen frame buffer
memset(l_frame, (uint8_t)0,
(GAME_SCREEN_WIDTH * GAME_SCREEN_HEIGHT/8));
uint32_t rnd = random();
me->addImageAt(PRESS_BUTTON_BMP,
(uint8_t)(rnd % (GAME_SCREEN_WIDTH - 55)),
(int8_t) (rnd % (GAME_SCREEN_HEIGHT - 8)));
BSP_drawBitmap(l_frame, GAME_SCREEN_WIDTH, GAME_SCREEN_HEIGHT);
me->m_screenTimeEvt.postIn(me, BSP_TICKS_PER_SEC/3); // 1/3 sec
return Q_HANDLED();
}
case Q_EXIT_SIG: {
me->m_screenTimeEvt.disarm();
// clear the screen frame buffer
memset(l_frame, (uint8_t)0,
(GAME_SCREEN_WIDTH * GAME_SCREEN_HEIGHT/8));
BSP_drawBitmap(l_frame, GAME_SCREEN_WIDTH, GAME_SCREEN_HEIGHT);
return Q_HANDLED();
}
case SCREEN_TIMEOUT_SIG: {
return Q_TRAN(&Tunnel::screen_saver_hide);
}
}
return Q_SUPER(&Tunnel::screen_saver);
}
// helper functions ----------------------------------------------------------
//
// The bitmap for the "Press Button" text:
//
// xxx.........................xxx........x...x...........
// x..x........................x..x.......x...x...........
// x..x.x.xx..xx...xxx..xxx....x..x.x..x.xxx.xxx..xx..xxx.
// xxx..xx...x..x.x....x.......xxx..x..x..x...x..x..x.x..x
// x....x....xxxx..xx...xx.....x..x.x..x..x...x..x..x.x..x
// x....x....x.......x....x....x..x.x..x..x...x..x..x.x..x
// x....x.....xxx.xxx..xxx.....xxx...xxx...x...x..xx..x..x
// .......................................................
///
static uint8_t const press_button_bits[] = {
0x7F, 0x09, 0x09, 0x06, 0x00, 0x7C, 0x08, 0x04, 0x04, 0x00,
0x38, 0x54, 0x54, 0x58, 0x00, 0x48, 0x54, 0x54, 0x24, 0x00,
0x48, 0x54, 0x54, 0x24, 0x00, 0x00, 0x00, 0x00, 0x7F, 0x49,
0x49, 0x36, 0x00, 0x3C, 0x40, 0x40, 0x7C, 0x00, 0x04, 0x3F,
0x44, 0x00, 0x04, 0x3F, 0x44, 0x00, 0x38, 0x44, 0x44, 0x38,
0x00, 0x7C, 0x04, 0x04, 0x78
};
// bitmap of the Ship:
//
// x....
// xxx..
// xxxxx
///
static uint8_t const ship_bits[] = {
0x07, 0x06, 0x06, 0x04, 0x04
};
// bitmap of the Missile:
//
// xxx
///
static uint8_t const missile_bits[] = {
0x01, 0x01, 0x01
};
// bitmap of the Mine type-1:
//
// .x.
// xxx
// .x.
///
static uint8_t const mine1_bits[] = {
0x02, 0x07, 0x02
};
// bitmap of the Mine type-2:
//
// x..x
// .xx.
// .xx.
// x..x
///
static uint8_t const mine2_bits[] = {
0x09, 0x06, 0x06, 0x09
};
// Mine type-2 is nastier than Mine type-1. The type-2 mine can
// hit the Ship with any of its "tentacles". However, it can be
// destroyed by the Missile only by hitting its center, defined as
// the following bitmap:
//
// ....
// .xx.
// .xx.
// ....
///
static uint8_t const mine2_missile_bits[] = {
0x00, 0x06, 0x06, 0x00
};
// The bitmap of the explosion stage 0:
//
// .......
// .......
// ...x...
// ..x.x..
// ...x...
// .......
// .......
///
static uint8_t const explosion0_bits[] = {
0x00, 0x00, 0x08, 0x14, 0x08, 0x00, 0x00
};
// The bitmap of the explosion stage 1:
//
// .......
// .......
// ..x.x..
// ...x...
// ..x.x..
// .......
// .......
///
static uint8_t const explosion1_bits[] = {
0x00, 0x00, 0x14, 0x08, 0x14, 0x00, 0x00
};
// The bitmap of the explosion stage 2:
//
// .......
// .x...x.
// ..x.x..
// ...x...
// ..x.x..
// .x...x.
// .......
///
static uint8_t const explosion2_bits[] = {
0x00, 0x22, 0x14, 0x08, 0x14, 0x22, 0x00
};
// The bitmap of the explosion stage 3:
//
// x..x..x
// .x.x.x.
// ..x.x..
// xx.x.xx
// ..x.x..
// .x.x.x.
// x..x..x
///
static uint8_t const explosion3_bits[] = {
0x49, 0x2A, 0x14, 0x6B, 0x14, 0x2A, 0x49
};
struct Bitmap { // the auxiliary structure to hold const bitmaps
uint8_t const *bits; // the bits in the bitmap
uint8_t width; // the width of the bitmap
};
static Bitmap const l_bitmap[MAX_BMP] = {
{ press_button_bits, Q_DIM(press_button_bits) },
{ ship_bits, Q_DIM(ship_bits) },
{ missile_bits, Q_DIM(missile_bits) },
{ mine1_bits, Q_DIM(mine1_bits) },
{ mine2_bits, Q_DIM(mine2_bits) },
{ mine2_missile_bits, Q_DIM(mine2_missile_bits) },
{ explosion0_bits, Q_DIM(explosion0_bits) },
{ explosion1_bits, Q_DIM(explosion1_bits) },
{ explosion2_bits, Q_DIM(explosion2_bits) },
{ explosion3_bits, Q_DIM(explosion3_bits) }
};
//............................................................................
uint32_t random(void) { // a very cheap pseudo-random-number generator
// "Super-Duper" Linear Congruential Generator (LCG)
// LCG(2^32, 3*7*11*13*23, 0, seed)
l_rnd = l_rnd * (3*7*11*13*23);
return l_rnd >> 8;
}
//............................................................................
void randomSeed(uint32_t seed) {
l_rnd = seed;
}
//............................................................................
void Tunnel::advance(void) {
uint32_t rnd;
uint32_t bmp1; // bimap representing 1 column of the image
rnd = (random() & 0xFF);
// reduce the top wall thickness 18.75% of the time
if ((rnd < 48) && (m_wall_thickness_top > 0)) {
--m_wall_thickness_top;
}
// reduce the bottom wall thickness 18.75% of the time
if ((rnd > 208) && (m_wall_thickness_bottom > 0)) {
--m_wall_thickness_bottom;
}
rnd = (random() & 0xFF);
// grow the top wall thickness 18.75% of the time
if ((rnd < 48)
&& ((GAME_SCREEN_HEIGHT
- m_wall_thickness_top
- m_wall_thickness_bottom) > m_minimal_gap)
&& ((m_last_mine_x < (GAME_SCREEN_WIDTH - 5))
|| (m_last_mine_y > (m_wall_thickness_top + 1))))
{
++m_wall_thickness_top;
}
// grow the bottom wall thickness 18.75% of the time
if ((rnd > 208)
&& ((GAME_SCREEN_HEIGHT
- m_wall_thickness_top
- m_wall_thickness_bottom) > m_minimal_gap)
&& ((m_last_mine_x < (GAME_SCREEN_WIDTH - 5))
|| (m_last_mine_y + 1
< (GAME_SCREEN_HEIGHT - m_wall_thickness_bottom))))
{
++m_wall_thickness_bottom;
}
// advance the Tunnel by 1 game step to the left
memmove(l_walls, l_walls + GAME_SPEED_X,
(GAME_SCREEN_WIDTH * GAME_SCREEN_HEIGHT/8) - GAME_SPEED_X);
bmp1 = (~(~0 << m_wall_thickness_top))
| (~0 << (GAME_SCREEN_HEIGHT
- m_wall_thickness_bottom));
l_walls[GAME_SCREEN_WIDTH - 1] = (uint8_t)bmp1;
l_walls[GAME_SCREEN_WIDTH + GAME_SCREEN_WIDTH - 1]
= (uint8_t)(bmp1 >> 8);
// copy the Tunnel layer to the main frame buffer
memcpy(l_frame, l_walls, (GAME_SCREEN_WIDTH * GAME_SCREEN_HEIGHT/8));
}
//............................................................................
void Tunnel::plantMine(void) {
uint32_t rnd = (random() & 0xFF);
if (m_last_mine_x > 0) {
--m_last_mine_x; // shift the last Mine 1 position to the left
}
// last mine far enough?
if ((m_last_mine_x + GAME_MINES_DIST_MIN < GAME_SCREEN_WIDTH)
&& (rnd < 8)) // place the mines only 5% of the time
{
uint8_t n;
for (n = 0; n < Q_DIM(m_mines); ++n) { // look for disabled mines
if (m_mines[n] == (QHsm *)0) {
break;
}
}
if (n < Q_DIM(m_mines)) { // a disabled Mine found?
ObjectPosEvt ope; // event to dispatch to the Mine
rnd = (random() & 0xFFFF);
if ((rnd & 1) == 0) { // choose the type of the mine
m_mines[n] = m_mine1_pool[n];
}
else {
m_mines[n] = m_mine2_pool[n];
}
// new Mine is planted in the last column of the tunnel
m_last_mine_x = GAME_SCREEN_WIDTH;
// choose a random y-position for the Mine in the Tunnel
rnd %= (GAME_SCREEN_HEIGHT
- m_wall_thickness_top
- m_wall_thickness_bottom - 4);
m_last_mine_y = m_wall_thickness_top + 2 + rnd;
ope.sig = MINE_PLANT_SIG;
ope.x = m_last_mine_x;
ope.y = m_last_mine_y;
m_mines[n]->dispatch(&ope); // direct dispatch
}
}
}
//............................................................................
void Tunnel::dispatchToAllMines(QEvt const *e) {
uint8_t n;
for (n = 0; n < GAME_MINES_MAX; ++n) {
if (m_mines[n] != (QHsm *)0) { // is the mine used?
m_mines[n]->dispatch(e);
}
}
}
//............................................................................
void Tunnel::addImageAt(uint8_t bmp, uint8_t x_pos, int8_t y_pos) {
uint8_t x; // the x-index of the ship image
uint8_t w; // the width of the image
Q_REQUIRE(bmp < Q_DIM(l_bitmap));
w = l_bitmap[bmp].width;
if (w > GAME_SCREEN_WIDTH - x_pos) {
w = GAME_SCREEN_WIDTH - x_pos;
}
for (x = 0; x < w; ++x) {
uint32_t bmp1;
if (y_pos >= 0) {
bmp1 = (l_bitmap[bmp].bits[x] << (uint8_t)y_pos);
}
else {
bmp1 = (l_bitmap[bmp].bits[x] >> (uint8_t)(-y_pos));
}
l_frame[x_pos + x] |= (uint8_t)bmp1;
l_frame[x_pos + x + GAME_SCREEN_WIDTH] |= (uint8_t)(bmp1 >> 8);
}
}
//............................................................................
uint8_t Tunnel::isWallHit(uint8_t bmp, uint8_t x_pos, uint8_t y_pos) {
uint8_t x;
uint8_t w; // the width of the image
Q_REQUIRE(bmp < Q_DIM(l_bitmap));
w = l_bitmap[bmp].width;
if (w > GAME_SCREEN_WIDTH - x_pos) {
w = GAME_SCREEN_WIDTH - x_pos;
}
for (x = 0; x < w; ++x) {
uint32_t bmp1 = ((uint32_t)l_bitmap[bmp].bits[x] << y_pos);
if (((l_walls[x_pos + x] & (uint8_t)bmp1) != 0)
|| ((l_walls[x_pos + x + GAME_SCREEN_WIDTH]
& (uint8_t)(bmp1 >> 8)) != 0))
{
return (uint8_t)1;
}
}
return (uint8_t)0;
}
//............................................................................
uint8_t do_bitmaps_overlap(uint8_t bmp_id1, uint8_t x1, uint8_t y1,
uint8_t bmp_id2, uint8_t x2, uint8_t y2)
{
uint8_t x;
uint8_t x0;
uint8_t w;
uint32_t bits1;
uint32_t bits2;
Bitmap const *bmp1;
Bitmap const *bmp2;
Q_REQUIRE((bmp_id1 < Q_DIM(l_bitmap)) && (bmp_id2 < Q_DIM(l_bitmap)));
bmp1 = &l_bitmap[bmp_id1];
bmp2 = &l_bitmap[bmp_id2];
// is the incoming object starting to overlap the Mine bitmap?
if ((x1 <= x2) && (x1 + bmp2->width > x2)) {
x0 = x2 - x1;
w = x1 + bmp2->width - x2;
if (w > bmp1->width) {
w = bmp1->width;
}
for (x = 0; x < w; ++x) { // scan over the overlapping columns
bits1 = ((uint32_t)bmp2->bits[x + x0] << y2);
bits2 = ((uint32_t)bmp1->bits[x] << y1);
if ((bits1 & bits2) != 0) { // do the bits overlap?
return (uint8_t)1; // yes!
}
}
}
else {
if ((x1 > x2) && (x2 + bmp1->width > x1)) {
x0 = x1 - x2;
w = x2 + bmp1->width - x1;
if (w > bmp2->width) {
w = bmp2->width;
}
for (x = 0; x < w; ++x) { // scan over the overlapping columns
bits1 = ((uint32_t)bmp1->bits[x + x0] << y1);
bits2 = ((uint32_t)bmp2->bits[x] << y2);
if ((bits1 & bits2) != 0) { // do the bits overlap?
return (uint8_t)1; // yes!
}
}
}
}
return (uint8_t)0; // the bitmaps do not overlap
}
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