108 lines
3.1 KiB
C#
108 lines
3.1 KiB
C#
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using UnityEngine;
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using FSA = UnityEngine.Serialization.FormerlySerializedAsAttribute;
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namespace Lean.Common
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{
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/// <summary>This component will constrain the current <b>transform.position</b> to the specified <b>LeanPlane</b> shape.</summary>
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[DefaultExecutionOrder(200)]
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[HelpURL(LeanHelper.HelpUrlPrefix + "LeanConstrainToOrthographic")]
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[AddComponentMenu(LeanHelper.ComponentPathPrefix + "Constrain To Orthographic")]
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public class LeanConstrainToOrthographic : MonoBehaviour
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{
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/// <summary>The camera whose orthographic size will be used.</summary>
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public Camera Camera { set { _camera = value; } get { return _camera; } } [FSA("Camera")] [SerializeField] private Camera _camera;
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/// <summary>The plane this transform will be constrained to.</summary>
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public LeanPlane Plane { set { plane = value; } get { return plane; } } [FSA("Plane")] [SerializeField] private LeanPlane plane;
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protected virtual void LateUpdate()
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{
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// Make sure the camera exists
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var camera = LeanHelper.GetCamera(_camera, gameObject);
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if (camera != null)
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{
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if (plane != null)
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{
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var ray = _camera.ViewportPointToRay(new Vector3(0.5f, 0.5f, 0.0f));
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var hit = default(Vector3);
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if (plane.TryRaycast(ray, ref hit, 0.0f, false) == true)
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{
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var oldPosition = transform.position;
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var local = plane.transform.InverseTransformPoint(hit);
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var snapped = local;
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var size = new Vector2(_camera.orthographicSize * _camera.aspect, _camera.orthographicSize);
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if (plane.ClampX == true)
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{
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var min = plane.MinX + size.x;
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var max = plane.MaxX - size.x;
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if (min > max)
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{
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snapped.x = (min + max) * 0.5f;
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}
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else
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{
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snapped.x = Mathf.Clamp(local.x, min, max);
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}
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}
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if (plane.ClampY == true)
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{
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var min = plane.MinY + size.y;
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var max = plane.MaxY - size.y;
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if (min > max)
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{
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snapped.y = (min + max) * 0.5f;
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}
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else
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{
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snapped.y = Mathf.Clamp(local.y, min, max);
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}
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}
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if (local != snapped)
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{
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var delta = oldPosition - hit;
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var newPosition = plane.transform.TransformPoint(snapped) + delta;
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if (Mathf.Approximately(oldPosition.x, newPosition.x) == false ||
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Mathf.Approximately(oldPosition.y, newPosition.y) == false ||
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Mathf.Approximately(oldPosition.z, newPosition.z) == false)
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{
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transform.position = newPosition;
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}
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}
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}
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}
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}
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else
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{
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Debug.LogError("Failed to find camera. Either tag your cameras MainCamera, or set one in this component.", this);
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}
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}
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}
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}
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#if UNITY_EDITOR
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namespace Lean.Common.Editor
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{
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using TARGET = LeanConstrainToOrthographic;
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[UnityEditor.CanEditMultipleObjects]
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[UnityEditor.CustomEditor(typeof(TARGET))]
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public class LeanConstrainToOrthographic_Editor : LeanEditor
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{
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protected override void OnInspector()
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{
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TARGET tgt; TARGET[] tgts; GetTargets(out tgt, out tgts);
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Draw("_camera", "The camera whose orthographic size will be used.");
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Draw("plane", "The plane this transform will be constrained to.");
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}
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}
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}
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#endif
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