465 lines
8.2 KiB
C++
465 lines
8.2 KiB
C++
//Using SDL and standard IO
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#include "SDL.h"
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#include <cstdio>
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#include <string>
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#include <fstream>
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#include <vector>
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//Screen dimension constants
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const int SCREEN_WIDTH = 896;
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const int SCREEN_HEIGHT = 1024;
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const int TILE_WIDTH = 32;
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const int TILE_HEIGHT = 32;
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const float SPEED = 0.16f;
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const float SMOOTH = 0.5f;
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enum TILE_TYPE {
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DEFAULT = 0,
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HORIZONTAL_WALL = 1,
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VERTICAL_WALL = 2,
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DOT = 3
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};
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class Vector2D {
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public:
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Vector2D(float x, float y) : m_x(x), m_y(y) {}
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float getX() { return m_x; }
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float getY() { return m_y; }
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void setX(float x) { m_x = x; }
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void setY(float y) { m_y = y; }
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float length() { return sqrt(m_x * m_x + m_y * m_y); }
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Vector2D operator+(const Vector2D& v2) const {
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return Vector2D(m_x + v2.m_x, m_y + v2.m_y);
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}
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friend Vector2D& operator+=(Vector2D& v1, const Vector2D& v2) {
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v1.m_x += v2.m_x;
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v1.m_y += v2.m_y;
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return v1;
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}
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Vector2D operator*(float scalar) {
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return Vector2D(m_x * scalar, m_y * scalar);
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}
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Vector2D& operator*=(float scalar) {
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m_x *= scalar;
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m_y *= scalar;
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return *this;
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}
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Vector2D operator-(const Vector2D& v2) const {
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return Vector2D(m_x - v2.m_x, m_y - v2.m_y);
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}
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friend Vector2D& operator-=(Vector2D& v1, const Vector2D& v2) {
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v1.m_x -= v2.m_x;
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v1.m_y -= v2.m_y;
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return v1;
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}
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Vector2D operator/(float scalar) {
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return Vector2D(m_x / scalar, m_y / scalar);
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}
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Vector2D& operator/=(float scalar) {
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m_x /= scalar;
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m_y /= scalar;
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return *this;
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}
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void normalize() {
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float l = length();
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if (l > 0) {
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(*this) *= 1 / l;
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}
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}
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private:
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float m_x;
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float m_y;
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};
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class KTile {
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public:
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//Initializes position and type
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KTile(int x, int y, TILE_TYPE tileType);
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//Shows the tile
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void render();
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//Get the tile type
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int getType();
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SDL_Rect getBox();
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private:
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//The attributes of the tile
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SDL_Rect mBox;
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//The tile type
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TILE_TYPE mType;
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};
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int KTile::getType()
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{
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return mType;
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}
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SDL_Rect KTile::getBox()
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{
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return mBox;
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}
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//Texture wrapper class
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class KTexture
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{
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public:
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//Initializes variables
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KTexture();
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//Deallocates memory
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~KTexture();
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//Loads image at specified path
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bool loadFromFile(std::string path);
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//Deallocates texture
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void free();
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//Renders texture at given point
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void render(int x, int y, SDL_Rect* clip = NULL);
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//Gets image dimensions
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int getWidth();
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int getHeight();
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private:
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//The actual hardware texture
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SDL_Texture* mTexture;
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//Image dimensions
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int mWidth;
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int mHeight;
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};
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SDL_Window* gWindow = NULL;
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SDL_Renderer* gRenderer = NULL;
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KTexture gTileTextures[4];
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std::vector<KTile> gTiles;
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bool init();
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bool loadMedia();
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void close();
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SDL_Texture* loadTexture(std::string path);
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KTexture::KTexture()
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{
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//Initialize
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mTexture = NULL;
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mWidth = 0;
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mHeight = 0;
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}
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KTexture::~KTexture()
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{
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//Deallocate
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free();
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}
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bool KTexture::loadFromFile(std::string path)
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{
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//Get rid of preexisting texture
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free();
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//The final texture
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SDL_Texture* newTexture = NULL;
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//Load image at specified path
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SDL_Surface* loadedSurface = SDL_LoadBMP(path.c_str());
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if (loadedSurface == NULL)
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{
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printf("Unable to load image %s! SDL_image Error: %s\n", path.c_str(), SDL_GetError());
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}
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else
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{
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//Color key image
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SDL_SetColorKey(loadedSurface, SDL_TRUE, SDL_MapRGB(loadedSurface->format, 0xFF, 0, 0));
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//Create texture from surface pixels
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newTexture = SDL_CreateTextureFromSurface(gRenderer, loadedSurface);
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if (newTexture == NULL)
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{
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printf("Unable to create texture from %s! SDL Error: %s\n", path.c_str(), SDL_GetError());
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}
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else
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{
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//Get image dimensions
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mWidth = loadedSurface->w;
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mHeight = loadedSurface->h;
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}
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//Get rid of old loaded surface
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SDL_FreeSurface(loadedSurface);
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}
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//Return success
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mTexture = newTexture;
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return mTexture != NULL;
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}
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void KTexture::free()
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{
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//Free texture if it exists
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if (mTexture != NULL)
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{
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SDL_DestroyTexture(mTexture);
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mTexture = NULL;
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mWidth = 0;
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mHeight = 0;
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}
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}
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void KTexture::render(int x, int y, SDL_Rect* clip)
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{
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//Set rendering space and render to screen
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SDL_Rect renderQuad = { x, y, mWidth, mHeight };
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//Set clip rendering dimensions
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if (clip != NULL)
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{
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renderQuad.w = clip->w;
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renderQuad.h = clip->h;
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}
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//Render to screen
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SDL_RenderCopy(gRenderer, mTexture, clip, &renderQuad);
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}
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int KTexture::getWidth()
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{
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return mWidth;
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}
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int KTexture::getHeight()
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{
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return mHeight;
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}
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bool init()
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{
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//Initialization flag
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bool success = true;
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//Initialize SDL
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if (SDL_Init(SDL_INIT_VIDEO) < 0)
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{
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printf("SDL could not initialize! SDL_Error: %s\n", SDL_GetError());
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success = false;
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}
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else
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{
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//Set texture filtering to linear
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if (!SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "1"))
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{
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printf("Warning: Linear texture filtering not enabled!");
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}
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//Create window
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gWindow = SDL_CreateWindow("2DGK - Zadanie 3", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, SCREEN_WIDTH, SCREEN_HEIGHT, SDL_WINDOW_SHOWN);
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if (gWindow == NULL)
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{
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printf("Window could not be created! SDL_Error: %s\n", SDL_GetError());
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success = false;
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}
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else
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{
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//Create renderer for window
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gRenderer = SDL_CreateRenderer(gWindow, -1, SDL_RENDERER_ACCELERATED);
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if (gRenderer == NULL)
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{
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printf("Renderer could not be created! SDL Error: %s\n", SDL_GetError());
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success = false;
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}
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else
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{
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//Initialize renderer color
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SDL_SetRenderDrawColor(gRenderer, 0, 0xFF, 0, 0xFF);
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}
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}
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}
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return success;
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}
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bool loadMedia()
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{
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//Loading success flag
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bool success = true;
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for (int i = TILE_TYPE::DEFAULT; i <= TILE_TYPE::DOT; ++i)
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{
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if (!gTileTextures[i].loadFromFile("textures/0" + std::to_string(i) + ".bmp"))
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{
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printf("Failed to load 0%d texture image!\n", i);
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success = false;
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}
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}
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gTiles.clear();
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std::ifstream levelFile;
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levelFile.open("level.txt");
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if (levelFile.fail())
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{
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printf("Failed to load level.txt!\n");
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success = false;
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}
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else
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{
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int y = 0;
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std::string line;
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while (std::getline(levelFile, line)) {
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for (int i = 0; i < line.length(); ++i) {
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TILE_TYPE type = TILE_TYPE::DEFAULT;
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switch (line[i])
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{
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case '|':
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type = TILE_TYPE::VERTICAL_WALL;
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break;
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case '-':
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type = TILE_TYPE::HORIZONTAL_WALL;
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break;
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case '.':
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type = TILE_TYPE::DOT;
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break;
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}
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gTiles.push_back(KTile(i*TILE_WIDTH, y*TILE_HEIGHT, type));
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}
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++y;
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}
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levelFile.close();
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}
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return success;
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}
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SDL_Texture* loadTexture(std::string path)
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{
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//The final optimized image
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SDL_Texture* newTexture = NULL;
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//Load image at specified path
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SDL_Surface* loadedSurface = SDL_LoadBMP(path.c_str());
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if (loadedSurface == NULL)
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{
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printf("Unable to load image %s! SDL Error: %s\n", path.c_str(), SDL_GetError());
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}
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else
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{
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//Create texture from surface pixels
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newTexture = SDL_CreateTextureFromSurface(gRenderer, loadedSurface);
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if (newTexture == NULL)
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{
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printf("Unable to optimize image %s! SDL Error: %s\n", path.c_str(), SDL_GetError());
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}
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//Get rid of old loaded surface
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SDL_FreeSurface(loadedSurface);
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}
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return newTexture;
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}
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void close()
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{
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//Free loaded images
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for (int i = 0; i <= TILE_TYPE::DOT; ++i)
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gTileTextures[i].free();
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//Destroy window
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SDL_DestroyRenderer(gRenderer);
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SDL_DestroyWindow(gWindow);
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gWindow = NULL;
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gRenderer = NULL;
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//Quit SDL subsystems
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SDL_Quit();
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}
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int main(int argc, char* args[])
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{
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//Start up SDL and create window
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if (!init())
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{
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printf("Failed to initialize!\n");
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}
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else
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{
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//Load media
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if (!loadMedia())
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{
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printf("Failed to load media!\n");
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}
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else
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{
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//Main loop flag
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bool quit = false;
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//Event handler
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SDL_Event e;
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//While application is running
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while (!quit)
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{//Handle events on queue
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while (SDL_PollEvent(&e) != 0)
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{
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//User requests quit
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if (e.type == SDL_QUIT)
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{
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quit = true;
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}
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}
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//Clear screen
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SDL_SetRenderDrawColor(gRenderer, 0, 0xFF, 0, 0xFF);
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SDL_RenderClear(gRenderer);
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for (auto& tile : gTiles)
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tile.render();
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//Update screen
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SDL_RenderPresent(gRenderer);
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}
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}
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}
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//Free resources and close SDL
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close();
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return 0;
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}
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KTile::KTile(int x, int y, TILE_TYPE tileType)
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{
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//Get the offsets
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mBox.x = x;
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mBox.y = y;
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mBox.w = TILE_WIDTH;
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mBox.h = TILE_HEIGHT;
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//Get the tile type
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mType = tileType;
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}
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void KTile::render()
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{
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gTileTextures[mType].render(mBox.x, mBox.y);
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}
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