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import { Object3D } from 'three'; | |
import { component } from 'bidello'; | |
import { viewport, scroll } from './bidello'; | |
import camera from './camera'; | |
export default class extends component(Object3D) { | |
init() { | |
this.element = this._args[0]; | |
} | |
onResize() { | |
if (!this.element) { | |
return; | |
} | |
const rect = this.element.getBoundingClientRect(); | |
this.bounds = { | |
left: rect.left, | |
top: rect.top, | |
width: rect.width, | |
height: rect.height, | |
}; | |
this.updateSize(); | |
this.updatePosition(); | |
} | |
updateSize() { | |
this.camUnit = camera.calculateUnitSize(camera.position.z - this.position.z); | |
/* | |
calculateUnitSize(distance = this.position.z) { | |
const vFov = this.fov * Math.PI / 180; | |
const height = 2 * Math.tan(vFov / 2) * distance; | |
const width = height * this.aspect; | |
return { | |
width, | |
height | |
}; | |
} | |
*/ | |
// Set size | |
const x = this.bounds.width / viewport.width; | |
const y = this.bounds.height / viewport.height; | |
if (!x || !y) { | |
return; | |
} | |
this.scale.x = this.camUnit.width * x; | |
this.scale.y = this.camUnit.height * y; | |
} | |
updatePosition(pos = scroll.y) { | |
const y = pos; | |
// Set origin to top left | |
this.position.x = -(this.camUnit.width / 2) + (this.scale.x / 2); | |
this.position.y = (this.camUnit.height / 2) - (this.scale.y / 2); | |
// Set position | |
this.position.x += (this.bounds.left / viewport.width) * this.camUnit.width; | |
this.position.y -= ((this.bounds.top - y) / viewport.height) * this.camUnit.height; | |
} | |
onRaf() { | |
this.updatePosition(scroll.easeY); | |
} | |
destroy() { | |
this.parent && this.parent.remove(this); | |
this.visible = false; | |
super.destroy(); | |
} | |
} |
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