Whether it is PC games or mobile applications, collision detection is always the difficulty of program development, and even can be used as a standard to measure whether the game engine is perfect. Good collision detection requires that the character can move smoothly in the scene, and can automatically go up when meeting a certain height of steps, while the high step blocks the character, can go up when meeting a slope with a small slope, and will block the character when the slope is too large. When all the forward directions are blocked, the character should be allowed to slide in a reasonable direction as much as possible instead of being forced to stop.<br>
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