JS method to determine collision_javascript skills-JS Tutorial-php.cn

JS method to determine collision_javascript skills

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Release： 2016-05-16 16:14:25

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The example in this article describes the method of determining collision in JS. Share it with everyone for your reference. The details are as follows:

JS collision method:

Copy code The code is as follows:

/**Determine whether there is a collision 

* @param obj original object 

* @param dobj target object 

​*/ 

function impact(obj, dobj) { 

var o = { 

          x: getDefaultStyle(obj, 'left'), 

      y: getDefaultStyle(obj, 'top'), 

           w: getDefaultStyle(obj, 'width'), 

h: getDefaultStyle(obj, 'height') 

}  

var d = { 

          x: getDefaultStyle(dobj, 'left'), 

      y: getDefaultStyle(dobj, 'top'), 

           w: getDefaultStyle(dobj, 'width'), 

h: getDefaultStyle(dobj, 'height') 

}  

var px, py; 

px = o.x <= d.x ? d.x : o.x; 

py = o.y <= d.y ? d.y : o.y; 

// Determine whether the points are in both objects 

if (px >= o.x && px <= o.x o.w && py >= o.y && py <= o.y o.h && px >= d.x && px <= d.x d.w && py >= d.y && py < = d.y d.h) { 

         return true;                              
} else { 

          return false;                               
}  

} 

/**Get object properties 

* @param obj Object 

* @param attribute attribute 

​*/ 

function getDefaultStyle(obj, attribute) { 

Return parseInt(obj.currentStyle ? obj.currentStyle[attribute] : document.defaultView.getComputedStyle(obj, false)[attribute]); 

}

An example is as follows:

Copy code The code is as follows:

demo

希望本文所述对大家的javascript程序设计有所帮助。