您最多选择25个主题
主题必须以中文或者字母或数字开头，可以包含连字符 (-)，并且长度不得超过35个字符
91 行
4.0 KiB
91 行
4.0 KiB
using UnityEngine;
|
|
using Cinemachine.Utility;
|
|
|
|
namespace Cinemachine
|
|
{
|
|
/// <summary>
|
|
/// An add-on module for Cinemachine Virtual Camera that adjusts
|
|
/// the FOV of the lens to keep the target object at a constant size on the screen,
|
|
/// regardless of camera and target position.
|
|
/// </summary>
|
|
[DocumentationSorting(16, DocumentationSortingAttribute.Level.UserRef)]
|
|
[ExecuteInEditMode]
|
|
[AddComponentMenu("")] // Hide in menu
|
|
[SaveDuringPlay]
|
|
public class CinemachineFollowZoom : CinemachineExtension
|
|
{
|
|
/// <summary>The shot width to maintain, in world units, at target distance.
|
|
/// FOV will be adusted as far as possible to maintain this width at the
|
|
/// target distance from the camera.</summary>
|
|
[Tooltip("The shot width to maintain, in world units, at target distance.")]
|
|
public float m_Width = 2f;
|
|
|
|
/// <summary>Increase this value to soften the aggressiveness of the follow-zoom.
|
|
/// Small numbers are more responsive, larger numbers give a more heavy slowly responding camera. </summary>
|
|
[Range(0f, 20f)]
|
|
[Tooltip("Increase this value to soften the aggressiveness of the follow-zoom. Small numbers are more responsive, larger numbers give a more heavy slowly responding camera.")]
|
|
public float m_Damping = 1f;
|
|
|
|
/// <summary>Will not generate an FOV smaller than this.</summary>
|
|
[Range(1f, 179f)]
|
|
[Tooltip("Lower limit for the FOV that this behaviour will generate.")]
|
|
public float m_MinFOV = 3f;
|
|
|
|
/// <summary>Will not generate an FOV larget than this.</summary>
|
|
[Range(1f, 179f)]
|
|
[Tooltip("Upper limit for the FOV that this behaviour will generate.")]
|
|
public float m_MaxFOV = 60f;
|
|
|
|
private void OnValidate()
|
|
{
|
|
m_Width = Mathf.Max(0, m_Width);
|
|
m_MaxFOV = Mathf.Clamp(m_MaxFOV, 1, 179);
|
|
m_MinFOV = Mathf.Clamp(m_MinFOV, 1, m_MaxFOV);
|
|
}
|
|
|
|
class VcamExtraState
|
|
{
|
|
public float m_previousFrameZoom = 0;
|
|
}
|
|
|
|
/// <summary>Callback to preform the zoom adjustment</summary>
|
|
protected override void PostPipelineStageCallback(
|
|
CinemachineVirtualCameraBase vcam,
|
|
CinemachineCore.Stage stage, ref CameraState state, float deltaTime)
|
|
{
|
|
VcamExtraState extra = GetExtraState<VcamExtraState>(vcam);
|
|
if (!enabled || deltaTime < 0)
|
|
extra.m_previousFrameZoom = state.Lens.FieldOfView;
|
|
|
|
// Set the zoom after the body has been positioned, but before the aim,
|
|
// so that composer can compose using the updated fov.
|
|
if (stage == CinemachineCore.Stage.Body)
|
|
{
|
|
// Try to reproduce the target width
|
|
float targetWidth = Mathf.Max(m_Width, 0);
|
|
float fov = 179f;
|
|
float d = Vector3.Distance(state.CorrectedPosition, state.ReferenceLookAt);
|
|
if (d > UnityVectorExtensions.Epsilon)
|
|
{
|
|
// Clamp targetWidth to FOV min/max
|
|
float minW = d * 2f * Mathf.Tan(m_MinFOV * Mathf.Deg2Rad / 2f);
|
|
float maxW = d * 2f * Mathf.Tan(m_MaxFOV * Mathf.Deg2Rad / 2f);
|
|
targetWidth = Mathf.Clamp(targetWidth, minW, maxW);
|
|
|
|
// Apply damping
|
|
if (deltaTime >= 0 && m_Damping > 0)
|
|
{
|
|
float currentWidth = d * 2f * Mathf.Tan(extra.m_previousFrameZoom * Mathf.Deg2Rad / 2f);
|
|
float delta = targetWidth - currentWidth;
|
|
delta = Damper.Damp(delta, m_Damping, deltaTime);
|
|
targetWidth = currentWidth + delta;
|
|
}
|
|
fov = 2f * Mathf.Atan(targetWidth / (2 * d)) * Mathf.Rad2Deg;
|
|
}
|
|
LensSettings lens = state.Lens;
|
|
lens.FieldOfView = extra.m_previousFrameZoom = Mathf.Clamp(fov, m_MinFOV, m_MaxFOV);
|
|
state.Lens = lens;
|
|
}
|
|
}
|
|
}
|
|
}
|