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#include "Level.h"
#include <iostream>
#include <fstream>
#include "Monster.h"
#include "Pickup.h"
#include "Hazard.h"
#include "Platform.h"
Level::Level() {
startX = -1;
startY = -1;
}
void Level::changeLevel(int levelNo) {
// Load background image
if (!(background = loadImage("space.png")))
std::cout << "Level::changeLevel: Error loading background image.\n";
// Make player into a Marcus
player.setImage("marcussheet.png");
player.setClip(ORIENT_FRONT, MARCUS_WIDTH * 0, 0, MARCUS_WIDTH, MARCUS_HEIGHT);
player.setClip(ORIENT_BACK, MARCUS_WIDTH * 1, 0, MARCUS_WIDTH, MARCUS_HEIGHT);
player.setClip(ORIENT_RIGHT, MARCUS_WIDTH * 2, 0, MARCUS_WIDTH, MARCUS_HEIGHT);
player.setClip(ORIENT_LEFT, MARCUS_WIDTH * 3, 0, MARCUS_WIDTH, MARCUS_HEIGHT);
// Read the map file (all level/player init should be done here, not above)
loadMap(levelNo);
// Cope for no defined start position
if (startX < 0) {
startX = 0;
startY = 0;
}
player.setX(startX);
player.setY(startY);
cameraX = 0;
}
void Level::move() {
// Construct a rectangle for player, for collision detection
SDL_Rect rect;
rect.w = player.getClip()->w;
rect.h = player.getClip()->h;
// Only record y-coord for now
rect.y = player.getY();
// Apply gravity
player.incYVel(GRAVITY);
// Player x-axis movement
rect.x = player.getX() + player.getXVel();
// If there's a collision in the x-axis ...
while (checkCollision(rect)) {
// ... fit snugly to edge
if (player.getXVel() > 0) {
rect.x--;
} else {
rect.x++;
}
}
if (rect.x >= 0)
player.setX(rect.x);
// Player y-axis movement
rect.y = player.getY() + player.getYVel();
// If there's a collision in the y-axis ...
if (checkCollision(rect)) {
while (checkCollision(rect)) {
// ... fit snugly to edge
if (player.getYVel() > 0)
rect.y--;
else
rect.y++;
}
player.setYVel(0);
}
player.setY(rect.y);
// Kill the player if they fall off the screen
if (player.getY() > SCREEN_HEIGHT) {
player.kill();
player.setX(startX);
player.setY(startY);
cameraX = 0;
}
player.orient();
}
void Level::draw(Screen *screen) {
int x = cameraX
* (SCREEN_WIDTH - background->w)
/ (SCREEN_WIDTH - MAP_X*50);
int y = SCREEN_HEIGHT - background->h;
// Blit background
screen->blit(x, y, background);
// If player is in the middle of the screen ...
if (player.getX() + cameraX > SCREEN_WIDTH / 2 - player.getClip()->w / 2 + player.getXVel()
&& player.getX() + cameraX < SCREEN_WIDTH / 2 + player.getClip()->w / 2 + player.getXVel()) {
// ... and is either moving left, or moving right but not past the end of the map ...
if (player.getXVel() < 0 || (player.getXVel() > 0 && -cameraX + SCREEN_WIDTH < MAP_X * TILE_SIZE)) {
// ... then scroll the level
cameraX -= player.getXVel();
}
}
// Don't let the camera move to before the start of the level
if (cameraX > 0)
cameraX = 0;
// Blit player
screen->blit(player.getX() + cameraX, player.getY(), player.image, player.getClip());
// Draw each platform...
for (int i = 0; i < numPlatforms; i++) {
// ...if it is visible
if (platform[i].getX() + TILE_SIZE + cameraX >= 0 && platform[i].getX()
+ cameraX <= SCREEN_WIDTH) {
screen->blit(platform[i].getX() + cameraX, platform[i].getY(),
platform[0].image, platform[i].getClip());
}
}
}
void Level::loadMap(int LevelNo) {
numPlatforms = 0;
// TODO: Let each Platform have a reference a single tiles image
platform[0].setImage("tiles.png");
// Open map file
std::ifstream map("level01.map");
if (!map)
std::cout << "map is NULL.\n";
// Read each tile...
for (int i = 0; i < MAP_X * MAP_Y; i++) {
int type = -1;
map >> type;
if (map.fail()) {
std::cout << "map.fail().\n";
}
// ...and register it as a platform if it's a platform
if (type == 1 || type == 2) {
// Set x/y-coordinates
platform[numPlatforms].setX((i % MAP_X) * TILE_SIZE);
platform[numPlatforms].setY((i / MAP_X) * TILE_SIZE);
// Set the correct sprite sheet clip
platform[numPlatforms].setClip(0, TILE_SIZE * (type - 1), 0, TILE_SIZE, TILE_SIZE);
numPlatforms++;
} else if (type == 'P') {
// Set the player starting position
startX = (i % MAP_X) * TILE_SIZE;
startY = (i / MAP_X) * TILE_SIZE - player.getClip()->h;
}
}
// Close map file
map.close();
}
bool Level::checkCollision(SDL_Rect r) {
// Loop through each platform
for (int i = 0; i < numPlatforms; i++) {
// Check for collisions in the x-axis ...
if (r.x > platform[i].getX() - r.w && r.x < platform[i].getX() + TILE_SIZE)
// ... if found, check for collisions in the y-axis
if (r.y > platform[i].getY() - r.h && r.y < platform[i].getY() + TILE_SIZE)
return true;
}
return false;
}
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