我只是尝试使用THREE.OrbitControls来执行缩放投影,但我没有得到我想要的行为。
我认为可以将viewSize更改为左,右,上,下以创建近似缩放的内容
任何人都有更好的主意吗?
答案 0 :(得分:14)
是的,您可以使用以下模式实现OrthographicCamera
的缩放效果:
camera.zoom = 1.5;
camera.updateProjectionMatrix();
这也适用于PerspectiveCamera
。
three.js r.70
答案 1 :(得分:3)
我有一个缩放场景的功能。请试一试。
function zoom_all(center,size) {
// get the current lookAt vector of OrthographicCamera camera
var vectorLookAt = new THREE.Vector3(0, 0, -1);
vectorLookAt.applyQuaternion(camera.quaternion);
vectorLookAt.normalize();
// move back along lookat vector to set new position of camera
vectorLookAt.multiplyScalar(-size);
camera.position = new THREE.Vector3().addVectors(center, vectorLookAt);
// get current size of camera
var viewSize = 2 * camera.top;
var aspectRatio = 2 * camera.right / viewSize; // get aspectRatio of camera
// camera = new THREE.OrthographicCamera(
// -aspectRatio * viewSize / 2, aspectRatio * viewSize / 2,
// viewSize / 2, -viewSize / 2,
// 0.1, 1000);
// update new size for camera
viewSize = size;
// now update camera size
camera.left = -aspectRatio * viewSize / 2;
camera.right = aspectRatio * viewSize / 2;
camera.top = viewSize / 2;
camera.bottom = -viewSize / 2;
camera.near = 0.1;
camera.far = 2 * size;
camera.updateProjectionMatrix();
// you can set light to camera position
spotLight.position.set(camera.position.x, camera.position.y, camera.position.z);
// set center point for orbit control
orbitControls.center.set(center.x, center.y, center.z);
orbitControls.target.set(center.x, center.y, center.z);
}
答案 2 :(得分:1)
如果有人仍然感兴趣,我编辑了OrbitControls,以便根据WestLangley的答案使用正交相机:
https://github.com/traversc/OrbitControls-orthographic_camera_fix/blob/master/OrbitControls.js