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Originally posted by jake13jake
I guess I do misunderstand. I thought that adding this would check it.
--Do you mean this is a bad way to check it?
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In that code you are checking if the player has stopped. It is not what I am talking about, but it's indicative of the same mentality. If you treat the player's x and y velocities as separate concepts then you're likely to make mistakes such as the one I've pointed out. Want more? No problem.
1) Moving diagonally increases the player's speed more quickly than solely moving in any of the four main directions.
2) If the player moves diagonally, he/she can travel ~1.4 times faster than normal.
There are also other problems. The onwall check, for example, is inaccurate. The response to the detection of the wall is flawed too. Application of KSI-GS could fix it, but I guess you don't care about that any more than you care about vectors.
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I didn't mean playing with the code. I meant playing, as in being able to move a char across the screen with the arrow keys playing.
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No amount of playing a computer game will change a fundamental physical fact.