[英]Change color of mesh using mouseover in three js
我已经整理了一个使用jsonloader和three.js显示多个网格的WebGL脚本,现在我想添加MouseOver和onClick事件。 第一个是当鼠标悬停在网格上时简单地改变网格的颜色:
function render() {
requestAnimationFrame(render);
mesh.rotation.z += 0.090;
raycaster.setFromCamera(mouse, camera);
var intersects = raycaster.intersectObjects(scene.children);
for (var i = 0; i < intersects.length; i++) {
intersects[i].object.material.color.set(0xff0000);
}
renderer.render(scene, camera);
}
上面的渲染功能允许我将任何网格的颜色悬停在它上面。 我已经尝试了几个if / else变体尝试并且只有在鼠标悬停在网格上时才能使用此效果,但我无法使其工作 - 它只是保持红色。 任何人都可以建议我如何修改我的脚本?
谢谢。
您必须在鼠标移出时将颜色设置回原始颜色,这不会自动发生...
请在http://stemkoski.github.io上查看此示例 ,具体是更新方法:
这里有一个演示小提琴更新到最新的three.js大师:
// create a Ray with origin at the mouse position
// and direction into the scene (camera direction)
var vector = new THREE.Vector3( mouse.x, mouse.y, 1 );
projector.unprojectVector( vector, camera );
var ray = new THREE.Raycaster( camera.position, vector.sub( camera.position ).normalize() );
// create an array containing all objects in the scene with which the ray intersects
var intersects = ray.intersectObjects( scene.children );
// INTERSECTED = the object in the scene currently closest to the camera
// and intersected by the Ray projected from the mouse position
// if there is one (or more) intersections
if ( intersects.length > 0 )
{
// if the closest object intersected is not the currently stored intersection object
if ( intersects[ 0 ].object != INTERSECTED )
{
// restore previous intersection object (if it exists) to its original color
if ( INTERSECTED )
INTERSECTED.material.color.setHex( INTERSECTED.currentHex );
// store reference to closest object as current intersection object
INTERSECTED = intersects[ 0 ].object;
// store color of closest object (for later restoration)
INTERSECTED.currentHex = INTERSECTED.material.color.getHex();
// set a new color for closest object
INTERSECTED.material.color.setHex( 0xffff00 );
}
}
else // there are no intersections
{
// restore previous intersection object (if it exists) to its original color
if ( INTERSECTED )
INTERSECTED.material.color.setHex( INTERSECTED.currentHex );
// remove previous intersection object reference
// by setting current intersection object to "nothing"
INTERSECTED = null;
}
由于上面答案中的代码已经过时(我试过了)...你可以看一下threex.domevents库 。 它在我的情况下做了伎俩。
threex.domevents是一个three.js扩展,它在3d场景中提供dom事件。 始终努力接近通常的实践,事件名称与DOM中的相同。 语义也是一样的,这使得学习起来非常容易。 目前,可用的事件是click,dblclick,mouseup,mousedown,mouseover和mouse out。
这是一个使用它的示例:
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