由于某种奇怪的原因,每当我试图将一个较大的图像文件分割成(在我的情况下)32x32的图片时,我得到的却是整个图片,看起来被压缩成32x32(整个图片)。尽管在玩转了这些值之后,我意识到由于某种原因,SDL完全忽略了我使用SDL_Rect源(src)的请求。 这意味着当我运行程序时,我将源(src)矩形更改为的每个值都不会改变实际图像(甚至是一个荒谬的值)。

雪碧.h

#ifndef SPRITE_H_
#define SPRITE_H_

#pragma once
#include "Game.h"

struct Game;

struct Sprite
{
    //Needs to be fixed :/
    //Sprite(const std::string& filepath,int x,int y,int width, int height,Game*game);
    Sprite();
    ~Sprite();
    void Load(const std::string& filepath, int x, int y,int width,int height, Game*game);
    void Draw(Game*game);
    SDL_Rect*getDstRect(){ return &dst; }
    SDL_Rect*getSrcRect(){ return &src; }

private:
    SDL_Surface*surface = NULL;
    SDL_Texture*texture = NULL;
    SDL_Rect src;
    SDL_Rect dst;
    int img_width;
    int img_height;

};

#endif // SPRITE_H_

精灵.cpp

#include "Sprite.h"

Sprite::Sprite()
{

}

Sprite::~Sprite()
{

    SDL_DestroyTexture(texture);


    surface = NULL;
    texture = NULL;
}

void Sprite::Load(const std::string& filepath, int x, int y, int width, int height, Game*game)
{
    bool success = true;
    surface = IMG_Load(filepath.c_str());
    if (surface == NULL)
    {
        game->getConsole()->Error("SPRITE::Surface Is Not Loaded");
        success = false;
    }
    else
        game->getConsole()->Text("SPRITE::Surface Is Loaded");



    texture = SDL_CreateTextureFromSurface(game->getRenderer(), surface);
    if (texture == NULL)
    {
        game->getConsole()->Error("SPRITE::Texture Is Not Loaded");
        success = false;
    }
    else
        game->getConsole()->Text("SPRITE::Texture is Loaded");



    dst.x = x;
    dst.y = y;
    dst.w = height;
    dst.h = height;


    src.x = 0;
    src.y = 0;
    src.w = 0;
    src.h = 0;

    SDL_QueryTexture(texture, NULL, NULL, &src.w, &src.h);

    SDL_FreeSurface(surface);

    if (success)
        game->getConsole()->Text("Loaded Sprite at " + filepath);
    else
        game->getConsole()->Error("SPRITE::Failed To Load Sprite at " + filepath);

}

void Sprite::Draw(Game*game)
{
    SDL_RenderCopy(game->getRenderer(), texture, &src,&dst);
}

地图类的一部分

testPlayer.Load("bin/sprites/player.png", 200,200,32,32, game);

这就是我试图在干扰源(src)矩形之后更改目标(dst)矩形的值的地方。