我是一名新手程序员，试图跟随Tuturial在Steam上重新创建一个名为Timber的游戏（我相信）。该程序工作正常，我几乎完成了tutrial，但是当我添加代码时遇到了麻烦：
for (int i = 0 < NUM_BRANCHES; i++;)
{
branches[i].setTexture(textureBranch);
branches[i].setPosition(-2000, -2000);
// Set the sprite's origin to dead center
// We can then spin it around without changing its position
branches[i].setOrigin(220, 20);
}
Visual Studio说：branches [i] .setPosition（-2000，-2000）;抛出未处理的异常：写入访问冲突。 此是0x59AF28。发生
我也会发布完整的代码，道歉它有点乱。
#include "stdafx.h"
#include <sstream>
#include <SFML\Graphics.hpp>
using namespace sf;
// Function declaration
void updateBranches(int seed);
const int NUM_BRANCHES = 6;
Sprite branches[NUM_BRANCHES];
// Where is the player/branch?
// Left or right
enum class side{ LEFT, RIGHT, NONE };
side branchPositions[NUM_BRANCHES];
int main()
{
// Creates a video mode object
VideoMode vm(1920, 1080);
// Creates and opens a window for the game
RenderWindow window(vm, "Timber!!!", Style::Fullscreen);
// Create a texture to hold a graphic on the GPU
Texture textureBackground;
// Load a graphic into the texture
textureBackground.loadFromFile("graphics/background.png");
// Create a sprite
Sprite spriteBackground;
// Attach the texture to the sprite
spriteBackground.setTexture(textureBackground);
// Set the spriteBackground to cover the screen
spriteBackground.setPosition(0, 0);
// Make a tree sprite
Texture textureTree;
textureTree.loadFromFile("graphics/tree.png");
Sprite spriteTree;
spriteTree.setTexture(textureTree);
spriteTree.setPosition(810, 0);
// Prepare the bee
Texture textureBee;
textureBee.loadFromFile("graphics/bee.png");
Sprite spriteBee;
spriteBee.setTexture(textureBee);
spriteBee.setPosition(0, 450);
// Is the be currently moving?
bool beeActive = false;
// How fast can the bee fly
float beeSpeed = 0.0f;
// Make 3 cloud sprites from 1 texture
Texture textureCloud;
// Load 1 new texture
textureCloud.loadFromFile("graphics/cloud.png");
// 3 new sprites with the same texture
Sprite spriteCloud1;
Sprite spriteCloud2;
Sprite spriteCloud3;
spriteCloud1.setTexture(textureCloud);
spriteCloud2.setTexture(textureCloud);
spriteCloud3.setTexture(textureCloud);
// Position the clouds off screen
spriteCloud1.setPosition(0, 0);
spriteCloud2.setPosition(0, -150);
spriteCloud3.setPosition(0, -300);
// Are the clouds currently on the screen?
bool cloud1Active = false;
bool cloud2Active = false;
bool cloud3Active = false;
// How fast is each cloud?
float cloud1Speed = 0.1f;
float cloud2Speed = 0.2f;
float cloud3Speed = 0.3f;
// Variables to control time itself
Clock clock;
// Time bar
RectangleShape timeBar;
float timeBarStartWidth = 400;
float timeBarHeight = 80;
timeBar.setSize(Vector2f(timeBarStartWidth, timeBarHeight));
timeBar.setFillColor(Color::Red);
timeBar.setPosition((1920 / 2) - timeBarStartWidth / 2, 980);
Time gameTimeTotal;
float timeRemaining = 6.0f;
float timeBarWidthPerSecond = timeBarStartWidth / timeRemaining;
// Track whether the game is running
bool paused = true;
// Draw some text
int score = 0;
sf::Text messageText;
sf::Text scoreText;
// Font
Font font;
font.loadFromFile("fonts/KOMIKAP_.ttf");
// Set the font of our message
messageText.setFont(font);
scoreText.setFont(font);
// Assign the actual message
messageText.setString("Press Enter to Start!");
scoreText.setString("score = 0");
// Make text really big
messageText.setCharacterSize(75);
scoreText.setCharacterSize(100);
// Choose a color
messageText.setFillColor(Color::White);
scoreText.setFillColor(Color::Black);
// Position the text
FloatRect textRect = messageText.getLocalBounds();
messageText.setOrigin(textRect.left +
textRect.width / 2.0f,
textRect.top +
textRect.height / 2.0f);
messageText.setPosition(1920 / 2.0f, 1080 / 2.0f);
scoreText.setPosition(20, 20);
// Prepare 6 branches
Texture textureBranch;
textureBranch.loadFromFile("graphics/branch.png");
// Set the texture for each branch sprite
for (int i = 0 < NUM_BRANCHES; i++;)
{
branches[i].setTexture(textureBranch);
branches[i].setPosition(-2000, -2000);
// Set the sprite's origin to dead center
// We can then spin it around without changing its position
branches[i].setOrigin(220, 20);
}
while (window.isOpen())
{
/*
**************
Handles the player input
**************
*/
if (Keyboard::isKeyPressed(Keyboard::Escape))
{
window.close();
}
// Start the game
if (Keyboard::isKeyPressed(Keyboard::Return))
{
paused = false;
// Reset the time and the score
score = 0;
timeRemaining = 5;
}
/*
**************
Update the scene
**************
*/
if (!paused)
{
// Measure time
Time dt = clock.restart();
// Subtract from the amount of time remaining
timeRemaining -= dt.asSeconds();
// size up the time bar
timeBar.setSize(Vector2f(timeBarWidthPerSecond *
timeRemaining, timeBarHeight));
if (timeRemaining <= 0.0f)
{
// Pause the game
paused = true;
// Change the message shown to the player
messageText.setString("Out of time");
// Reposition the text base on its new size
FloatRect textRect = messageText.getLocalBounds();
messageText.setOrigin(textRect.left +
textRect.width / 2.0f,
textRect.top +
textRect.height / 2.0f);
messageText.setPosition(1920 / 2.0f, 1080 / 2.0f);
}
// Setup the bee
if (!beeActive)
{
// How fast is the bee
srand((int)time(0) * 10);
beeSpeed = (rand() % 400) + 350;
// How high is the bee
srand((int)time(0) * 10);
float height = (rand() % 650) + 850;
spriteBee.setPosition(1921, height);
beeActive = true;
}
else
// Move the bee
{
spriteBee.setPosition(
spriteBee.getPosition().x -
(beeSpeed * dt.asSeconds()),
spriteBee.getPosition().y);
// Has the bee reached the right hand edge of the screen?
if (spriteBee.getPosition().x < -100)
{
// Set it up ready to be a whole new bee next frame
beeActive = false;
}
}
// Manage the clouds
// Cloud 1
if (!cloud1Active)
{
// How fast is the cloud
srand((int)time(0) * 10);
cloud1Speed = (rand() % 150);
// How high is the cloud
srand((int)time(0) * 10);
float height = (rand() % 200);
spriteCloud1.setPosition(-300, height);
cloud1Active = true;
}
else
{
spriteCloud1.setPosition(
spriteCloud1.getPosition().x +
(cloud1Speed * dt.asSeconds()),
spriteCloud1.getPosition().y);
// Has the cloud reached the right hand edge of the screen?
if (spriteCloud1.getPosition().x > 1920)
{
// Set it up ready to be a whole new cloud next frame
cloud1Active = false;
}
}
// Cloud 2
if (!cloud2Active)
{
// How fast is the cloud
srand((int)time(0) * 20);
cloud2Speed = (rand() % 200);
// How high is the cloud
srand((int)time(0) * 20);
float height = (rand() % 300);
spriteCloud2.setPosition(-200, height);
cloud2Active = true;
}
else
{
spriteCloud2.setPosition(
spriteCloud2.getPosition().x +
(cloud1Speed * dt.asSeconds()),
spriteCloud2.getPosition().y);
// Has the cloud reached the right hand edge of the screen?
if (spriteCloud2.getPosition().x > 1920)
{
// Set it up ready to be a whole new cloud next frame
cloud2Active = false;
}
}
// Cloud 3
if (!cloud3Active)
{
// How fast is the cloud
srand((int)time(0) * 30);
cloud3Speed = (rand() % 250);
// How high is the cloud
srand((int)time(0) * 30);
float height = (rand() % 150);
spriteCloud3.setPosition(-100, height);
cloud3Active = true;
}
else
{
spriteCloud3.setPosition(
spriteCloud3.getPosition().x +
(cloud1Speed * dt.asSeconds()),
spriteCloud3.getPosition().y);
// Has the cloud reached the right hand edge of the screen?
if (spriteCloud3.getPosition().x > 1920)
{
// Set it up ready to be a whole new cloud next frame
cloud3Active = false;
}
}
// Update the score text
std::stringstream ss;
ss << "Score = " << score;
scoreText.setString(ss.str());
// Update the branch sprites
for (int i = 0; i < NUM_BRANCHES; i++)
{
float height = i * 150;
if (branchPositions[i] == side::LEFT)
{
// Move the sprite to the left side
branches[i].setPosition(610, height);
// Flip the sprite around the other way
branches[i].setRotation(180);
}
else if (branchPositions[i] == side::RIGHT)
{
// Move the sprite to the right side
branches[i].setPosition(1330, height);
// Set the sprite rotation to normal
branches[i].setRotation(0);
}
else
{
// Hide the branch
branches[i].setPosition(3000, height);
}
}
} // End if(!paused)
/*
**************
Draw the scene
**************
*/
// Clear everything from the last frame
window.clear();
// Draw our game scene here
window.draw(spriteBackground);
// Draw the clouds
window.draw(spriteCloud1);
window.draw(spriteCloud2);
window.draw(spriteCloud3);
// Draw the branches
for (int i = 0; i < NUM_BRANCHES; i++)
{
window.draw(branches[i]);
}
// Draw the tree
window.draw(spriteTree);
// Draw the insect
window.draw(spriteBee);
// Draw the score
window.draw(scoreText);
//Draw the timebar
window.draw(timeBar);
if (paused)
{
// Draw our message
window.draw(messageText);
}
// Show everyting we just drew
window.display();
}
return 0;
}
// Function definition
void updateBranches(int seed)
{
// Move all the branches down on place
for (int j = NUM_BRANCHES - 1; j > 0; j--)
{
branchPositions[j] = branchPositions[j - 1];
}
// Spawn a new branch at postion 0
// LEFt, RIGHT, NONE
srand((int)time(0) + seed);
int r = (rand() % 5);
switch (r)
{
case 0:
branchPositions[0] = side::LEFT;
break;
case 1:
branchPositions[0] = side::RIGHT;
break;
default:
branchPositions[0] = side::NONE;
break;
}
}
答案 0 :(得分：0)
setPosition（）需要sf :: Vector2f。因此，您可以通过将该行更改为：
来修复代码branches[i].setPosition(sf::Vector2f(-2000, -2000))