Hey folks,
I'm new round these parts (SFML and C++) and am working on a little RPG type project. Taking it one step at a time. Right now I'm looking for a little more information about the way to use sf::View to get sprites to scroll.
So I've got a map array of around 500 x 500. Each item in the array tells whether the player can move through that point (like a path) or if that particular point should be impassible (like a wall).
I read the map array and draw sprites to an active sf:View. I can then use
playerSprite.move(moveSpeed * clock.getElapsedTime().asSeconds(), 0); to slowly scroll around when a key is pressed. Keeping the view.setCenter on the playerSprite position.
What I'm struggling with is how to line-up the players position visually with the map array. The tiles move pixel by pixel and I'm not sure how to tell when the players position should be moved.
The map has a starting X/Y position. I'm not sure how to put the player sprite in the right location to even get it started.
I don't know if that makes sense.
Here's some code:
//define the players locaiton on the map array. These values are passed to us from the map itself
int charX, charY
// This begins the game loop itself
while (Window.isOpen())
{
// Event tells it to process any events in the "event loop"
sf::Event Event;
// this loop goes through all the events before moving on
while (Window.pollEvent(Event))
{
// Process events (keyboard ect)
switch (Event.type)
{
// stops the program if you click close
case sf::Event::Closed:
Window.close();
break;
}
}
if (Window.hasFocus())
{
if (sf::Keyboard::isKeyPressed(sf::Keyboard::Right))
{
playerSpr.move(moveSpeed * clock.getElapsedTime().asSeconds(), 0);
}
if (sf::Keyboard::isKeyPressed(sf::Keyboard::Left))
{
playerSpr.move(moveSpeed * clock.getElapsedTime().asSeconds()*-1, 0);
}
if (sf::Keyboard::isKeyPressed(sf::Keyboard::Up))
{
playerSpr.move(0, moveSpeed * clock.getElapsedTime().asSeconds()*-1);
}
if (sf::Keyboard::isKeyPressed(sf::Keyboard::Down))
{
playerSpr.move(0, moveSpeed * clock.getElapsedTime().asSeconds());
}
view.setCenter(playerSpr.getPosition());
}
// Draw stuff to the screen
Window.setView(view);
drawMap();
Window.draw(playerSpr);
Window.display();
Window.clear();
void drawMap()
{
// how much of the map around the charX/Y to draw
short viewDistance = 15;
// calculate the vertical view distance for wide screen
short vertViewDistance = (viewDistance / 4) * 3;
int sprX = 0, sprY = 0;
for (int y = (charY - vertViewDistance); y <= charY + vertViewDistance; y++)
{
//std::cout << "\t";
for (int x = (charX - viewDistance); x <= charX + viewDistance; x++)
{
if (x >= 0 && y >= 0 && x < mapWidth && y < mapHeight)
{
if (map[x][y] == " ")
{
// Draw Path
pathSpr.setPosition(sprX*96, sprY*96);
Window.draw(pathSpr);
}
else if (map[x][y] == "X" || map[x][y] == "0")
{
// Draw Wall
wallSpr.setPosition(sprX*96, sprY*96);
Window.draw(wallSpr);
}
}
sprX++;
}
sprY++;
sprX = 0;
}
}
]
Right now this code will move the player around the map. But it doesn't update the players location within the map array. So I can't tell if I'm walking into a wall or not.
Any thoughts on an approach?
