three.js - Change facing direction of CSS3DObject -


i have 3d scene bunch of css object want rotate pointing towards point in space.

my css objects simple rectangles lot wider high:

var element = document.createelement('div'); element.innerhtml = "test"; element.style.width = "75px"; element.style.height = "10px";  var object = new three.css3dobject(element);  object.position.x = x; object.position.y = y; object.position.z = z;

per default, created objects defined if "facing" z-axis. means if use lookat() function, objects rotate "test" text face point.

my problem rather rotate "right edge" of div pointing towards desired point. i've tried fiddling up-vector, feel wont work because still want up-vector point up. tried rotating object math.pi/2 along y axis first, lookat() seems ignore prior set rotation.

it seems need redefine objects local z-vector instead, runs along global x-vector. way objects "looking at"-direction right in scene, , lookat() orient properly.

sorry mangling terminology, newbie 3d programmer here.

object.lookat( point ) orient object object's internal positive z-axis points in direction of desired point.

if want object's internal positive x-axis point in direction of desired point, can use pattern:

object.lookat( point ); object.rotatey( - math.pi / 2 );

three.js r.84


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