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game.ino
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game.ino
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#include "gfx_engine.h"
#include "game.h"
#include <avr/pgmspace.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <stdlib.h>
#include <stdio.h>
#define D(x) x
const uint8_t level_map[][35] PROGMEM =
{
{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1},
{1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,1},
{1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,1},
{1,0,0,1,0,0,0,0,0,1,1,1,1,0,0,1,0,0,1,1,1,1,1,1,0,0,1,0,0,0,1,0,0,0,1},
{1,0,0,1,0,0,0,0,0,1,0,0,1,0,0,1,0,0,1,0,0,0,0,1,0,0,1,0,0,0,1,0,0,0,1},
{1,0,0,1,0,0,0,0,0,1,0,0,1,0,0,1,0,0,1,0,0,0,0,1,0,0,1,0,0,0,0,0,0,0,1},
{1,0,0,1,0,0,0,0,0,1,0,0,1,0,0,1,0,0,1,0,0,0,0,1,0,0,1,0,0,0,0,0,0,0,1},
{1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,0,0,1,0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1},
{1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1},
{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1},
{1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1},
{1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1},
{1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1},
{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,1,1,1,1,1,1,1,1},
{1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,1,0,0,0,0,0,0,1},
{1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,1,0,0,0,0,0,0,1},
{1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,0,0,1,0,0,0,0,0,0,1},
{1,0,0,0,1,1,1,1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1},
{1,0,0,0,1,0,0,1,1,0,0,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1},
{1,0,0,0,1,0,0,0,1,1,1,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1},
{1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1},
{1,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1},
{1,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1},
{1,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1},
{1,0,0,0,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1},
{1,0,0,0,0,0,0,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1},
{1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1},
{1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1},
{1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1},
{1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1},
{1,0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1},
{1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1},
{1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1},
{1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1},
{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}
};
const uint8_t gunBitmap [] PROGMEM = {
0x01, 0x80, 0x01, 0x80, 0x1f, 0xf8, 0x20, 0x04, 0x2f, 0xf4, 0x2f, 0xf4, 0x2f, 0xf4, 0x2f, 0xf4,
0x2f, 0xf4, 0x1f, 0xf8, 0x48, 0x08, 0xb7, 0xfe, 0x90, 0x02, 0x90, 0x01, 0x80, 0x02, 0x80, 0x01,
};
void disp_player_posistion (Player *player) {
int n = 0;
char buffer [10];
n = snprintf (buffer, 10, "%d:%d", (int)player->x, (int)player->y);
n--;
while(n >= 0){
display.drawChar(1+n*6, 56, buffer[n], BLACK, WHITE, 1);
n--;
}
}
void drawHUD(Player *player) {
char buffer [5];
int n = 0;
display.drawBitmap((DISP_WIDTH/2) - 8, DISP_HEIGHT-16, gunBitmap, 16, 16, BLACK);
if (player->shooting) {
display.fillRect((DISP_WIDTH/2) - 4, DISP_HEIGHT-12, 8, 5, WHITE);
}
disp_player_posistion(player);
//draw score
n = snprintf (buffer, 5, "P:%d", (int)player->points);
n--;
while(n >= 0){
display.drawChar(98+n*6, 56, buffer[n], BLACK, WHITE, 1);
n--;
}
}
/*Sets player in shooting state.
Collision detection happens in drawSprite function*/
void playerShoot(Player *player) {
if (digitalRead(SHOOT_BUTTON) == 0 || digitalRead(SHOOT_BUTTON2) == 0) {
player->shooting = 1;
}
}
/*limitation: to reduce calculations no enemy sorting is done -> only one enemy can be visible at a time*/
void drawSprite(Player *player, Enemy *enemy) {
for (uint8_t i = 0; i < NBR_OF_ENEMIES; i++) {
if (enemy[i].visible && !enemy[i].destroyed) {
//translate sprite position to relative to camera
double spriteX = enemy[i].xPos - player->x;
double spriteY = enemy[i].yPos - player->y;
//transform sprite with the inverse camera matrix (projection in camera plain)
// [ planeX dirX ] -1 [ dirY -dirX ]
// [ ] = 1/(planeX*dirY-dirX*planeY) * [ ]
// [ planeY dirY ] [ -planeY planeX ]
double invDet = 1.0 / (player->planeX * player->dirY - player->dirX * player->planeY); //required for correct matrix multiplication
double transformX = invDet * (player->dirY * spriteX - player->dirX * spriteY);
double transformY = invDet * (-1*player->planeY * spriteX + player->planeX * spriteY);
int16_t spriteScreenX = int((DISP_WIDTH / 2) * (1 + transformX / transformY));
int16_t spriteHeight = abs(int(DISP_HEIGHT / (transformY)));
//check i center screen is inside enemy
if (player->shooting && DISP_WIDTH/2 >= (spriteScreenX - (spriteHeight >> 2)) &&
DISP_WIDTH/2 <= (spriteScreenX + (spriteHeight >> 2))) {
//play shooting sound
enemy[i].destroyed = 1;
player->points += 1;
display.drawCircle(spriteScreenX, CAMERA_HEIGHT, spriteHeight >> 2, WHITE);
display.fillCircle(spriteScreenX, CAMERA_HEIGHT, (spriteHeight >> 2) - 1, BLACK);
display.fillCircle(spriteScreenX + (spriteHeight >> 3), CAMERA_HEIGHT - (spriteHeight >> 4), spriteHeight >> 4, WHITE);
display.fillCircle(spriteScreenX - (spriteHeight >> 3), CAMERA_HEIGHT - (spriteHeight >> 4), spriteHeight >> 4, WHITE);
display.drawLine(spriteScreenX + (spriteHeight >> 4), CAMERA_HEIGHT + (spriteHeight >> 3), spriteScreenX - (spriteHeight >> 4), CAMERA_HEIGHT + (spriteHeight >> 3), WHITE);
} else {
display.drawCircle(spriteScreenX, CAMERA_HEIGHT, spriteHeight >> 2, BLACK);
display.fillCircle(spriteScreenX, CAMERA_HEIGHT, (spriteHeight >> 2) - 1, WHITE);
display.fillCircle(spriteScreenX + (spriteHeight >> 3), CAMERA_HEIGHT - (spriteHeight >> 4), spriteHeight >> 4, BLACK);
display.fillCircle(spriteScreenX - (spriteHeight >> 3), CAMERA_HEIGHT - (spriteHeight >> 4), spriteHeight >> 4, BLACK);
display.drawLine(spriteScreenX + (spriteHeight >> 4), CAMERA_HEIGHT + (spriteHeight >> 3), spriteScreenX - (spriteHeight >> 4), CAMERA_HEIGHT + (spriteHeight >> 3), BLACK);
}
return; //only one enemy visible a time
}
}
}
void rotatePlayer(Player *player, uint8_t right) {
double rotation = right? -ROTSPEED : ROTSPEED;
double oldXDir = player->dirX;
player->dirX = player->dirX * cos(rotation) - player->dirY * sin(rotation);
player->dirY = oldXDir * sin(rotation) + player->dirY * cos(rotation);
double oldplaneX = player->planeX;
player->planeX = player->planeX * cos(rotation) - player->planeY * sin(rotation);
player->planeY = oldplaneX * sin(rotation) + player->planeY * cos(rotation);
}
void movePlayer(Player *player) {
double nextStepX = player->dirX * STEP_SIZE;
double nextStepY = player->dirY * STEP_SIZE;
if ( analogRead(A1) > 200) {
if (pgm_read_byte(&level_map[int(player->y)][int(player->x + nextStepX)]) != 1) {
player->x += nextStepX;
}
if (pgm_read_byte(&level_map[int(player->y + nextStepY)][int(player->x)]) != 1) {
player->y += nextStepY;
}
}
if (analogRead(A1) < 700) {
if (pgm_read_byte(&level_map[int(player->y)][int(player->x - nextStepX)]) != 1) {
player->x -= nextStepX;
}
if (pgm_read_byte(&level_map[int(player->y - nextStepY)][int(player->x)]) != 1) {
player->y -= nextStepY;
}
}
if (analogRead(A0) > 700) {
rotatePlayer(player, LEFT);
}
if (analogRead(A0) < 200) {
rotatePlayer(player, RIGHT);
}
}
void theEnd() {
display.setCursor(24,12);
display.setTextColor(BLACK, WHITE);
display.setTextSize(2);
display.print("MISSION");
display.setCursor(12,30);
display.print("COMPLETED");
}