我们创建了 Fontainebleau 演示来说明摄影photogrammetry流程和 LayeredLit 着色器的使用。
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using System;
using System.Collections;
using UnityEngine;
namespace UnityStandardAssets.Utility
{
public class DragRigidbody : MonoBehaviour
{
const float k_Spring = 50.0f;
const float k_Damper = 5.0f;
const float k_Drag = 10.0f;
const float k_AngularDrag = 5.0f;
const float k_Distance = 0.2f;
const bool k_AttachToCenterOfMass = false;
private SpringJoint m_SpringJoint;
private void Update()
{
// Make sure the user pressed the mouse down
if (!Input.GetMouseButtonDown(0))
{
return;
}
var mainCamera = FindCamera();
// We need to actually hit an object
RaycastHit hit = new RaycastHit();
if (
!Physics.Raycast(mainCamera.ScreenPointToRay(Input.mousePosition).origin,
mainCamera.ScreenPointToRay(Input.mousePosition).direction, out hit, 100,
Physics.DefaultRaycastLayers))
{
return;
}
// We need to hit a rigidbody that is not kinematic
if (!hit.rigidbody || hit.rigidbody.isKinematic)
{
return;
}
if (!m_SpringJoint)
{
var go = new GameObject("Rigidbody dragger");
Rigidbody body = go.AddComponent<Rigidbody>();
m_SpringJoint = go.AddComponent<SpringJoint>();
body.isKinematic = true;
}
m_SpringJoint.transform.position = hit.point;
m_SpringJoint.anchor = Vector3.zero;
m_SpringJoint.spring = k_Spring;
m_SpringJoint.damper = k_Damper;
m_SpringJoint.maxDistance = k_Distance;
m_SpringJoint.connectedBody = hit.rigidbody;
StartCoroutine("DragObject", hit.distance);
}
private IEnumerator DragObject(float distance)
{
var oldDrag = m_SpringJoint.connectedBody.drag;
var oldAngularDrag = m_SpringJoint.connectedBody.angularDrag;
m_SpringJoint.connectedBody.drag = k_Drag;
m_SpringJoint.connectedBody.angularDrag = k_AngularDrag;
var mainCamera = FindCamera();
while (Input.GetMouseButton(0))
{
var ray = mainCamera.ScreenPointToRay(Input.mousePosition);
m_SpringJoint.transform.position = ray.GetPoint(distance);
yield return null;
}
if (m_SpringJoint.connectedBody)
{
m_SpringJoint.connectedBody.drag = oldDrag;
m_SpringJoint.connectedBody.angularDrag = oldAngularDrag;
m_SpringJoint.connectedBody = null;
}
}
private Camera FindCamera()
{
if (GetComponent<Camera>())
{
return GetComponent<Camera>();
}
return Camera.main;
}
}
}