c# - Smoother transition in movement? -
i question. still new sfml 1 seemed bit tough. have tried using while loops , such no avail.
the game doing @ moment car going , forth on x axis , guess able pick points , stuff or avoid objects coming towards car until dies.
how make movement smoother? car move 8 units first, before moving 8 units in desired direction until let go of button. it's same when other way. instantly move , keep moving when press either key.
static void onkeypressed(object sender, eventargs e) { vector2f newpos = new vector2f(0, car.position.y); keyeventargs ke = (keyeventargs)e; if (ke.code.equals(keyboard.key.a)) { if (car.position.x != 0) { newpos.x = car.position.x - 8; car.position = newpos; } else if (car.position.x < 0) { newpos.x = 0; car.position = newpos; } else if(car.position.x == 0) { // nothing } } else if (ke.code.equals(keyboard.key.d)) { if (car.position.x != window.size.x - 32) { newpos.x = car.position.x + 8; car.position = newpos; } else if (car.position.x > window.size.x) { newpos.x = window.size.x; car.position = newpos; } else if (car.position.x == window.size.x) { // nothing } } } and entire thing reference:
using system; using system.collections.generic; using system.threading.tasks; using sfml.audio; using sfml.graphics; using sfml.window; namespace sfmlcargame { class program { private static renderwindow window; private static sprite car; static void main(string[] args) { window = new renderwindow(new videomode(256,512), "car game"); window.closed += new eventhandler(onclose); window.keypressed += new eventhandler<keyeventargs>(onkeypressed); sprite bg = new sprite(new texture("road.png")); car = new sprite(new texture("car.png")); car.position = new vector2f(window.size.x / 2, window.size.y - 96); while (window.isopen()) { window.dispatchevents(); window.clear(); window.draw(bg); window.draw(car); window.display(); } } static void onclose(object sender, eventargs e) { renderwindow window = (renderwindow)sender; window.close(); } static void onkeypressed(object sender, eventargs e) { vector2f newpos = new vector2f(0, car.position.y); keyeventargs ke = (keyeventargs)e; if (ke.code.equals(keyboard.key.a)) { if (car.position.x != 0) { newpos.x = car.position.x - 8; car.position = newpos; } else if (car.position.x < 0) { newpos.x = 0; car.position = newpos; } else if(car.position.x == 0) { // nothing } } else if (ke.code.equals(keyboard.key.d)) { if (car.position.x != window.size.x - 32) { newpos.x = car.position.x + 8; car.position = newpos; } else if (car.position.x > window.size.x) { newpos.x = window.size.x; car.position = newpos; } else if (car.position.x == window.size.x) { // nothing } } } } }
you may want read short tutorial sfml's website.
the events fired operating system, , purposes (quit event, key pressed, left mouse button clicked) aren't things need updated often. imagine writing text, , keep 'a' key pressed. text progressively grow aaaaaaaaaaa there little delay between spawns, imposed os. get, say, 6 letters second. same events. game running , displaying @ 60 fps clear movement not smooth , barely manageable.
hopefully sfml provides way check instant state of keyboard (and mouse , joystick). c# binding (i assuming using binding 2.0 version, , if don't should) have check keyboard.iskeypressed(yourkey). doing in main loop check @ each frame key pressed, , not wait os event way slower.
on side note, if previous questions answered correctly please mark them accepting answer.
edit : haven't sfml .net installed on computer here like
static void main(string[] args) { window = new renderwindow(new videomode(256,512), "car game"); window.closed += new eventhandler(onclose); // note // window.keypressed += new eventhandler<keyeventargs>(onkeypressed); sprite bg = new sprite(new texture("road.png")); car = new sprite(new texture("car.png")); car.position = new vector2f(window.size.x / 2, window.size.y - 96); while (window.isopen()) { window.dispatchevents(); checkinputs(); // , ! window.clear(); window.draw(bg); window.draw(car); window.display(); } } void checkinputs() { if(keyboard.iskeypressed(keyboard.key.a)) { if(car.position.x < 0) car.position.x = 0 else if(car.position.x > 0) car.position.x -= 8; // shortcut 'car.position.x = car.position.x - 8' } else if(keyboard.iskeypressed(keyboard.key.d)) { // etc } } this way transition should smoother, beware, 8 pixels might fast ! recommend read tutorial have linked, because explains functionning of inputs in language-agnostic way (even if examples in c++).
also, don't need event handler anymore commented it. but if checking other keys (like escape pause or whatever) don't delete it, remove part wrote moving car.
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