Original Post
Im making a game that involves the player controlling a human character, and am faced with a problem im sure everyone has encountered. When the player hits the "up" key, the character is supposed to move forward. At first, I made it so that if the "up" key is held down, then at every cycle of the game loop, the character's position is moved forward by some amount. It worked fine until i tried to implement physics. For physics, i need velocity and acceleration. When a force is applied, acceleration changes. At every cycle, i update velocity based on acceleration, then update position based on velocity. This, then, is a problem, because the change in position due to the "up" key is not reflected in the velocity. I then thought about having the "up" key adjust velocity, but then that would cause a similar problem between velocity and acceleration. If i make it adjust acceleration, it would involve some weird logic. Anyone know of a good solution? What is the method used in most games? Thanks.