碰撞 GameMaker 问题

Question

我是 GameMaker 新手，我按照“让我们一起学习”教程进行操作。我试图为我的角色制造碰撞，但是每次我的角色撞到物体时，它们都会被卡住，我无法再控制它们。我检查了很多次，也尝试了自己的想法，但没有任何效果。

if(keyboard_check(ord("D")) && place_free(x + collisionSpeed, y)) {
    x += walkSpeed;
    image_speed = walkSpeed / 3;
    sprite_index = sClaire_Side_Right;
}

if(keyboard_check(ord("A")) && place_free(x - collisionSpeed, y)) {
    x -= walkSpeed;
    image_speed = walkSpeed / 3;
    sprite_index = sClaire_Side_Left;
}

if(keyboard_check(ord("W")) && place_free(x, y - collisionSpeed)) {
    y -= walkSpeed;
    image_speed = walkSpeed / 3;
    sprite_index = sClaire_Normal_Back;
}

if(keyboard_check(ord("S")) && place_free(x, y + collisionSpeed)) {
    y += walkSpeed;
    image_speed = walkSpeed / 3;
    sprite_index = sClaire_Normal;
}


if(keyboard_check(vk_shift)) {
    walkSpeed = 7;

}

if(keyboard_check(vk_nokey)) {
    image_speed = 0;
    image_index = 0;
    walkSpeed = 3.5;
    
}

Answer 1

如果您正在移动实例

walkSpeed

，您还应该检查

walkSpeed

距离内的碰撞，不是

collisionSpeed

。

如果

collisionSpeed

比

walkSpeed

小 1 个像素，那么它可能不会返回碰撞，因为它将是碰撞发生前的最后一个像素。

一个很好的例子是当

walkSpeed=3

和

collisionSpeed=2

时，这肯定会导致实例卡在固体物体内。

Answer 2

要解决角色碰撞时卡住的问题，请确保碰撞速度和行走速度相同，或者碰撞检查与实际移动距离精确匹配。由于这些值之间的差异，您的角色可能会进入实际上并不清晰的空间。这是运动代码的调整版本，可确保检查和实际运动一致：

// Ensure walkSpeed is defined appropriately before this logic

if(keyboard_check(ord("D")) && place_free(x + walkSpeed, y)) {
    x += walkSpeed;
    image_speed = walkSpeed / 3;
    sprite_index = sClaire_Side_Right;
}

if(keyboard_check(ord("A")) && place_free(x - walkSpeed, y)) {
    x -= walkSpeed;
    image_speed = walkSpeed / 3;
    sprite_index = sClaire_Side_Left;
}

if(keyboard_check(ord("W")) && place_free(x, y - walkSpeed)) {
    y -= walkSpeed;
    image_speed = walkSpeed / 3;
    sprite_index = sClaire_Normal_Back;
}

if(keyboard_check(ord("S")) && place_free(x, y + walkSpeed)) {
    y += walkSpeed;
    image_speed = walkSpeed / 3;
    sprite_index = sClaire_Normal;
}


Also, consider adding a slight overlap allowance in your collision checks if your game's physics or design permits, to prevent the character from getting stuck at the edge of objects due to pixel-perfect collisions.

For dynamic speed adjustments (like when running), make sure any changes to walkSpeed are made before checking collisions and moving the character:


if(keyboard_check(vk_shift)) {
    walkSpeed = 7; // Example running speed
} else {
    walkSpeed = 3.5; // Example walking speed
}

// Movement and collision checks follow here, as shown above

最后，确保为所有涉及的精灵准确设置碰撞蒙版，以避免您看到的内容与游戏的碰撞逻辑之间出现任何差异。