forked from BilalY/Rasagar
803 lines
34 KiB
C#
803 lines
34 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using UnityEngine.TerrainTools;
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using UnityEngine;
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using UObject = UnityEngine.Object;
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using UnityEngine.Experimental.Rendering;
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namespace UnityEditor.TerrainTools
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{
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/// <summary>
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/// Provides methods for changing and restoring active <see cref="RenderTexture"/>s.
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/// </summary>
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public struct ActiveRenderTextureScope : IDisposable
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{
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RenderTexture m_Prev;
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/// <summary>
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/// Initializes and returns an instance of <see cref="ActiveRenderTextureScope"/>.
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/// </summary>
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/// <remarks>Call this constructor to swap the previous active <see cref="RenderTexture"/> with the RenderTexture that is passed in.</remarks>
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/// <param name="rt">The RenderTexture to set as active.</param>
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public ActiveRenderTextureScope(RenderTexture rt)
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{
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m_Prev = RenderTexture.active;
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RenderTexture.active = rt;
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}
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/// <summary>
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/// Restores the previous <see cref="RenderTexture"/>.
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/// </summary>
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public void Dispose()
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{
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// restore prev active RT
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RenderTexture.active = m_Prev;
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}
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}
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/// <summary>
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/// Provides a utility class for safely managing the lifetime of a <see cref="RenderTexture"/>.
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/// </summary>
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public class RTHandle
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{
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private RenderTexture m_RT;
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private bool m_IsTemp;
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/// <summary>
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/// The RenderTexture for this RTHandle.
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/// </summary>
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public RenderTexture RT => m_RT;
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/// <summary>
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/// The descriptor for the RTHandle and RenderTexture.
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/// </summary>
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public RenderTextureDescriptor Desc => m_RT?.descriptor ?? default;
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internal bool IsTemp => m_IsTemp;
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/// <summary>
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/// The name for the RTHandle and RenderTexture.
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/// </summary>
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public string Name {
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get => m_RT?.name ?? default;
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set => m_RT.name = value;
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}
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internal RTHandle()
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{
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}
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/// <summary>
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/// Sets the name of the <see cref="RenderTexture"/>, and returns a reference to this <see cref="RTHandle"/>.
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/// </summary>
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/// <param name="name">The name of the underlying RenderTexture.</param>
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/// <returns>Returns a reference to this RTHandle.</returns>
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public RTHandle WithName(string name)
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{
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Name = name;
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return this;
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}
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/// <summary>
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/// Converts the <see cref="RTHandle"/> to a <see cref="RenderTexture"/> type.
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/// </summary>
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/// <param name="handle">The RTHandle to convert.</param>
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/// <returns>Returns a RenderTexture handle.</returns>
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public static implicit operator RenderTexture(RTHandle handle)
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{
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return handle.RT;
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}
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/// <summary>
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/// Converts the <see cref="RTHandle"/> to a <see cref="Texture"/> type.
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/// </summary>
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/// <param name="handle">The RTHandle to convert.</param>
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/// <returns>Returns a RenderTexture handle.</returns>
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public static implicit operator Texture(RTHandle handle)
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{
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return handle.RT;
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}
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internal void SetRenderTexture(RenderTexture rt, bool isTemp)
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{
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m_RT = rt;
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m_IsTemp = isTemp;
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}
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/// <summary>
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/// Represents a <c>struct</c> for handling the lifetime of an <see cref="RTHandle"/> within a <c>using</c> block.
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/// </summary>
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/// <remarks>Releases the <see cref="RenderTexture"/> when this <c>struct</c> is disposed.</remarks>
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public struct RTHandleScope : System.IDisposable
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{
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RTHandle m_Handle;
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internal RTHandleScope(RTHandle handle)
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{
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m_Handle = handle;
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}
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/// <summary>
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/// Releases the handled RenderTexture.
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/// </summary>
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public void Dispose()
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{
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RTUtils.Release(m_Handle);
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}
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}
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/// <summary>
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/// Gets a new disposable <see cref="RTHandleScope"/> instance to use within <c>using</c> blocks.
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/// </summary>
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/// <returns>Returns a new RTHandleScope instance.</returns>
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public RTHandleScope Scoped() => new RTHandleScope(this);
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}
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/// <summary>
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/// Provides a utility class for getting and releasing <see cref="RenderTexture"/>s handles.
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/// </summary>
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/// <remarks>
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/// Tracks the lifetimes of these RenderTextures. Any RenderTextures that aren't released within several frames are regarded as leaked RenderTexture resources, which generate warnings in the Console.
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/// </remarks>
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public static class RTUtils
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{
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class Log
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{
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public int Frames;
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public string StackTrace;
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}
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internal static bool s_EnableStackTrace = false;
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private static Stack<Log> s_LogPool = new Stack<Log>();
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private static Dictionary<RTHandle, Log> s_Logs = new Dictionary<RTHandle, Log>();
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internal static int s_CreatedHandleCount;
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internal static int s_TempHandleCount;
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private static bool m_AgeCheckAdded;
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private static void AgeCheck()
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{
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if (!m_AgeCheckAdded)
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{
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Debug.LogError("Checking lifetime of RenderTextures but m_AgeCheckAdded = false");
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}
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foreach (var kvp in s_Logs)
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{
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var log = kvp.Value;
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if (log.Frames >= 4)
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{
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var trace = !s_EnableStackTrace ? string.Empty : "\n" + log.StackTrace;
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Debug.LogWarning($"RTHandle \"{kvp.Key.Name}\" has existed for more than 4 frames. Possible memory leak.{trace}");
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}
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log.Frames++;
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}
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}
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private static void CheckAgeCheck()
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{
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if (s_TempHandleCount != 0 || s_CreatedHandleCount != 0)
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return;
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Debug.Assert(s_Logs.Count == 0, "Internal RTHandle type counts for temporary and non-temporary RTHandles are both 0 but the containers for tracking leaked RTHandles have counts that are not 0");
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if (!m_AgeCheckAdded)
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{
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EditorApplication.update += AgeCheck;
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m_AgeCheckAdded = true;
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}
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else
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{
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EditorApplication.update -= AgeCheck;
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m_AgeCheckAdded = false;
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}
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}
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private static void AddLogForHandle(RTHandle handle)
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{
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var log = s_LogPool.Any() ? s_LogPool.Pop() : new Log();
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if (s_EnableStackTrace)
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log.StackTrace = System.Environment.StackTrace;
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s_Logs.Add(handle, log);
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}
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/// <summary>
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/// Gets a RenderTextureDescriptor for <see cref="RenderTexture"/> operations on GPU.
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/// </summary>
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/// <param name="width">The width of the RenderTexture.</param>
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/// <param name="height">The height of the RenderTexture.</param>
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/// <param name="format">The <see cref="RenderTextureFormat"/> of the RenderTexture.</param>
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/// <param name="depth">The depth of the RenderTexture.</param>
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/// <param name="mipCount">The mip count of the RenderTexture. Default is <c>0</c>.</param>
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/// <param name="srgb">The flag that determines whether RenderTextures created using this descriptor are in sRGB or Linear space.</param>
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/// <returns>Returns a RenderTextureDescriptor object.</returns>
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/// <seealso cref="GetDescriptor"/>
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public static RenderTextureDescriptor GetDescriptor(int width, int height, int depth, RenderTextureFormat format, int mipCount = 0, bool srgb = false)
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{
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return GetDescriptor(width, height, depth, GraphicsFormatUtility.GetGraphicsFormat(format, srgb), mipCount, srgb);
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}
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/// <summary>
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/// Gets a RenderTextureDescriptor for <see cref="RenderTexture"/> operations on GPU with the <c>enableRandomWrite</c> flag set to <c>true</c>.
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/// </summary>
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/// <param name="width">The width of the RenderTexture.</param>
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/// <param name="height">The height of the RenderTexture.</param>
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/// <param name="format">The <see cref="RenderTextureFormat"/> of the RenderTexture.</param>
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/// <param name="depth">The depth of the RenderTexture.</param>
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/// <param name="mipCount">The mip count of the RenderTexture. Default is <c>0</c>.</param>
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/// <param name="srgb">The flag that determines whether RenderTextures created using this descriptor are in sRGB or Linear space.</param>
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/// <returns>Returns a RenderTextureDescriptor object.</returns>
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/// <seealso cref="GetDescriptor"/>
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public static RenderTextureDescriptor GetDescriptorRW(int width, int height, int depth, RenderTextureFormat format, int mipCount = 0, bool srgb = false)
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{
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return GetDescriptorRW(width, height, depth, GraphicsFormatUtility.GetGraphicsFormat(format, srgb), mipCount, srgb);
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}
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/// <summary>
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/// Gets a RenderTextureDescriptor for <see cref="RenderTexture"/> operations on GPU with the <c>enableRandomWrite</c> flag set to <c>true</c>.
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/// </summary>
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/// <param name="width">The width of the RenderTexture.</param>
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/// <param name="height">The height of the RenderTexture.</param>
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/// <param name="format">The <see cref="RenderTextureFormat"/> of the RenderTexture.</param>
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/// <param name="depth">The depth of the RenderTexture.</param>
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/// <param name="mipCount">The mip count of the RenderTexture. Default is <c>0</c>.</param>
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/// <param name="srgb">The flag that determines whether RenderTextures created using this descriptor are in sRGB or Linear space.</param>
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/// <returns>Returns a RenderTextureDescriptor object.</returns>
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/// <seealso cref="GetDescriptor"/>
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public static RenderTextureDescriptor GetDescriptorRW(int width, int height, int depth, GraphicsFormat format, int mipCount = 0, bool srgb = false)
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{
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var desc = GetDescriptor(width, height, depth, format, mipCount, srgb);
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desc.enableRandomWrite = true;
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return desc;
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}
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/// <summary>Gets a RenderTextureDescriptor set up for <see cref="RenderTexture"/> operations on GPU.</summary>
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/// <param name="width">The width of the RenderTexture.</param>
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/// <param name="height">The height of the RenderTexture.</param>
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/// <param name="format">The <see cref="RenderTextureFormat"/> of the RenderTexture.</param>
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/// <param name="depth">The depth of the RenderTexture.</param>
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/// <param name="mipCount">The mip count of the RenderTexture. Default is <c>0</c>.</param>
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/// <param name="srgb">The flag that determines whether RenderTextures created using this descriptor are in sRGB or Linear space.</param>
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/// <returns>Returns a RenderTextureDescriptor object.</returns>
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public static RenderTextureDescriptor GetDescriptor(int width, int height, int depth, GraphicsFormat format, int mipCount = 0, bool srgb = false)
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{
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var desc = new RenderTextureDescriptor(width, height, format, depth)
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{
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sRGB = srgb,
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mipCount = mipCount,
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useMipMap = mipCount != 0,
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};
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return desc;
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}
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private static RTHandle GetHandle(RenderTextureDescriptor desc, bool isTemp)
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{
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CheckAgeCheck();
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if (isTemp)
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s_TempHandleCount++;
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else
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s_CreatedHandleCount++;
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var handle = new RTHandle();
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handle.SetRenderTexture(isTemp ? RenderTexture.GetTemporary(desc) : new RenderTexture(desc), isTemp);
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AddLogForHandle(handle);
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return handle;
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}
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/// <summary>
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/// Gets an <see cref="RTHandle"/> for a <see cref="RenderTexture"/> acquired with <see cref="RenderTexture.GetTemporary"/>.
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/// </summary>
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/// <remarks>Use <see cref="RTUtils.Release"/> to release the RTHandle.</remarks>
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/// <param name="desc">RenderTextureDescriptor for the RenderTexture.</param>
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/// <returns>Returns a temporary RTHandle.</returns>
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/// <seealso cref="RenderTextureDescriptor"/>
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public static RTHandle GetTempHandle(RenderTextureDescriptor desc)
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{
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return GetHandle(desc, true);
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}
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/// <summary>
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/// Gets an <see cref="RTHandle"/> for a <see cref="RenderTexture"/> acquired with <see cref="RenderTexture.GetTemporary"/>.
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/// </summary>
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/// <remarks>Use <see cref="RTUtils.Release"/> to release the RTHandle.</remarks>
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/// <param name="width">The width of the RenderTexture.</param>
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/// <param name="height">The height of the RenderTexture.</param>
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/// <param name="depth">The depth of the RenderTexture.</param>
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/// <param name="format">The format of the RenderTexture.</param>
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/// <returns>Returns a temporary RTHandle.</returns>
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public static RTHandle GetTempHandle(int width, int height, int depth, GraphicsFormat format)
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{
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return GetHandle(GetDescriptor(width, height, depth, format), true);
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}
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/// <summary>
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/// Gets an <see cref="RTHandle"/> for a <see cref="RenderTexture"/> acquired with <c>new RenderTexture(desc)</c>.
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/// </summary>
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/// <param name="desc">The <c>RenderTextureDescriptor</c> for the RenderTexture.</param>
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/// <returns>Returns an RTHandle.</returns>
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/// <seealso cref="RenderTextureDescriptor"/>
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public static RTHandle GetNewHandle(RenderTextureDescriptor desc)
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{
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return GetHandle(desc, false);
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}
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/// <summary>
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/// Gets an <see cref="RTHandle"/> for a <see cref="RenderTexture"/> acquired with <c>new RenderTexture(desc)</c>.
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/// </summary>
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/// <remarks>Use <see cref="RTUtils.Release"/> to release the RTHandle.</remarks>
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/// <param name="width">The width of the RenderTexture.</param>
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/// <param name="height">The height of the RenderTexture.</param>
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/// <param name="depth">The depth of the RenderTexture.</param>
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/// <param name="format">The format of the RenderTexture.</param>
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/// <returns>Returns an RTHandle.</returns>
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public static RTHandle GetNewHandle(int width, int height, int depth, GraphicsFormat format)
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{
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return GetHandle(GetDescriptor(width, height, depth, format), false);
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}
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/// <summary>
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/// Releases the <see cref="RenderTexture"/> resource associated with the specified <see cref="RTHandle"/>.
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/// </summary>
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/// <param name="handle">The RTHandle from which to release RenderTexture resources.</param>
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/// <seealso cref="RenderTexture.ReleaseTemporary"/>
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public static void Release(RTHandle handle)
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{
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if (handle.RT == null)
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return;
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if (!s_Logs.ContainsKey(handle))
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throw new InvalidOperationException("Attemping to release a RTHandle that is not currently tracked by the system. This should never happen");
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var log = s_Logs[handle];
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s_Logs.Remove(handle);
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log.Frames = 0;
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log.StackTrace = null;
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s_LogPool.Push(log);
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if (handle.IsTemp)
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{
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--s_TempHandleCount;
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RenderTexture.ReleaseTemporary(handle.RT);
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}
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else
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{
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--s_CreatedHandleCount;
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handle.RT.Release();
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Destroy(handle.RT);
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}
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CheckAgeCheck();
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}
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/// <summary>
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/// Destroys a <see cref="RenderTexture"/> created using <c>new RenderTexture()</c>.
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/// </summary>
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/// <param name="rt">The RenderTexture to destroy.</param>
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/// <seealso cref="UObject.Destroy"/>
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/// <seealso cref="UObject.DestroyImmediate"/>
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public static void Destroy(RenderTexture rt)
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{
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if (rt == null)
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return;
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#if UNITY_EDITOR
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if (Application.isPlaying)
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UObject.Destroy(rt);
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else
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UObject.DestroyImmediate(rt);
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#else
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UObject.Destroy(rt);
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#endif
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}
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/// <summary>
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/// Gets the number of <see cref="RTHandle"/>s that have been requested and not released yet.
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/// </summary>
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/// <returns>Returns the number of RTHandles that have been requested and not released.</returns>
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public static int GetHandleCount() => s_Logs.Count;
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}
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/// <summary>
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/// Provides utility methods for Terrain.
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/// </summary>
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public static class Utility
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{
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static Material m_DefaultPreviewMat = null;
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/// <summary>
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/// Retrieves the default preview <see cref="Material"/> for painting on Terrains.
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/// </summary>
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/// <param name="filtersPreviewEnabled">Whether the filter preview is enabled.</param>
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/// <returns>Returns Terrain painting's default preview <see cref="Material"/>.</returns>
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public static Material GetDefaultPreviewMaterial(bool filtersPreviewEnabled = false)
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{
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if (m_DefaultPreviewMat == null)
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{
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m_DefaultPreviewMat = new Material(Shader.Find("Hidden/TerrainTools/BrushPreview"));
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}
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SetMaterialKeyword(m_DefaultPreviewMat, FilterUtility.filterPreviewKeyword, filtersPreviewEnabled);
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//set defaults for uniforms in the shader
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m_DefaultPreviewMat.SetFloat("_HoleStripeThreshold", 1.0f/255.0f);
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m_DefaultPreviewMat.SetFloat("_UseAltColor", 0.0f);
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m_DefaultPreviewMat.SetFloat("_IsPaintHolesTool", 0.0f);
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return m_DefaultPreviewMat;
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}
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static Material m_PaintHeightMat;
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/// <summary>
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/// Gets the paint height material to render builtin brush passes.
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/// </summary>
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/// <remarks>
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/// This material overrides the Builtin PaintHeight shader with Terrain Tools version of PaintHeight.
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/// See <see cref="TerrainBuiltinPaintMaterialPasses"/> for the available passes to choose from.
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/// See "/com.unity.terrain-tools/Shaders/PaintHeight.shader" for the override PaintHeight shader.
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/// </remarks>
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/// <returns>Material with the Paint Height shader </returns>
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public static Material GetPaintHeightMaterial()
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{
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if (m_PaintHeightMat == null)
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{
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m_PaintHeightMat = new Material(Shader.Find("Hidden/TerrainEngine/PaintHeightTool"));
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}
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return m_PaintHeightMat;
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}
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private static Material m_TexelValidityMaterial;
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private static Material GetTexelValidityMaterial()
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{
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if (m_TexelValidityMaterial == null)
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{
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m_TexelValidityMaterial = new Material(Shader.Find("Hidden/TerrainTools/TexelValidityBlit"));
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}
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return m_TexelValidityMaterial;
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}
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/// <summary>
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/// Prepares the passed in <see cref="Material"/> for painting on Terrains.
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/// </summary>
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/// <param name="paintContext">The painting context data.</param>
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/// <param name="brushTransform">The brush's transformation data.</param>
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/// <param name="material">The material being used for painting on Terrains.</param>
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/// <seealso cref="PaintContext"/>
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/// <seealso cref="BrushTransform"/>
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public static void SetupMaterialForPainting(PaintContext paintContext, BrushTransform brushTransform, Material material)
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{
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TerrainPaintUtility.SetupTerrainToolMaterialProperties(paintContext, brushTransform, material);
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material.SetVector("_Heightmap_Tex",
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new Vector4(
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1f / paintContext.targetTextureWidth,
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1f / paintContext.targetTextureHeight,
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paintContext.targetTextureWidth,
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paintContext.targetTextureHeight)
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);
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|
material.SetVector("_PcPixelRect",
|
|
new Vector4(paintContext.pixelRect.x,
|
|
paintContext.pixelRect.y,
|
|
paintContext.pixelRect.width,
|
|
paintContext.pixelRect.height)
|
|
);
|
|
|
|
material.SetVector("_PcUvVectors",
|
|
new Vector4(paintContext.pixelRect.x / (float)paintContext.targetTextureWidth,
|
|
paintContext.pixelRect.y / (float)paintContext.targetTextureHeight,
|
|
paintContext.pixelRect.width / (float)paintContext.targetTextureWidth,
|
|
paintContext.pixelRect.height / (float)paintContext.targetTextureHeight)
|
|
);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Prepares the passed in <see cref="Material"/> for painting on Terrains while checking for Texel Validity.
|
|
/// </summary>
|
|
/// <param name="paintContext">The painting context data.</param>
|
|
/// <param name="texelCtx">The texel context data.</param>
|
|
/// <param name="brushTransform">The brush's transformation data.</param>
|
|
/// <param name="material">The material being used for painting on Terrains.</param>
|
|
/// <seealso cref="PaintContext"/>
|
|
/// <seealso cref="BrushTransform"/>
|
|
public static void SetupMaterialForPaintingWithTexelValidityContext(PaintContext paintContext, PaintContext texelCtx, BrushTransform brushTransform, Material material)
|
|
{
|
|
SetupMaterialForPainting(paintContext, brushTransform, material);
|
|
material.SetTexture("_PCValidityTex", texelCtx.sourceRenderTexture);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Retrieves texel context data used for checking texel validity.
|
|
/// </summary>
|
|
/// <param name="terrain"></param>
|
|
/// <param name="boundsInTerrainSpace"></param>
|
|
/// <param name="extraBorderPixels"></param>
|
|
/// <returns>Returns the <see cref="PaintContext"/> object used for checking texel validity.</returns>
|
|
public static PaintContext CollectTexelValidity(Terrain terrain, Rect boundsInTerrainSpace, int extraBorderPixels = 0)
|
|
{
|
|
var res = terrain.terrainData.heightmapResolution;
|
|
// use holes format because we really only need to know if the texel value is 0 or 1
|
|
var ctx = PaintContext.CreateFromBounds(terrain, boundsInTerrainSpace, res, res, extraBorderPixels);
|
|
ctx.CreateRenderTargets(Terrain.holesRenderTextureFormat);
|
|
ctx.Gather(
|
|
t => t.terrain.terrainData.heightmapTexture, // just provide heightmap texture. no need to create a temp one
|
|
new Color(0, 0, 0, 0),
|
|
blitMaterial: GetTexelValidityMaterial()
|
|
);
|
|
|
|
return ctx;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Converts data from a <see cref="AnimationCurve"/> into a <see cref="Texture2D"/>
|
|
/// </summary>
|
|
/// <param name="curve">The <see cref="AnimationCurve"/> to convert from.</param>
|
|
/// <param name="tex">The <see cref="Texture2D"/> to convert data into.</param>
|
|
/// <returns>Returns the range of the <see cref="AnimationCurve"/>.</returns>
|
|
public static Vector2 AnimationCurveToRenderTexture(AnimationCurve curve, ref Texture2D tex)
|
|
{
|
|
//assume this a 1D texture that has already been created
|
|
tex.wrapMode = TextureWrapMode.Clamp;
|
|
tex.filterMode = FilterMode.Bilinear;
|
|
|
|
float val = curve.Evaluate(0.0f);
|
|
Vector2 range = new Vector2(val, val);
|
|
|
|
Color[] pixels = new Color[tex.width * tex.height];
|
|
pixels[0].r = val;
|
|
for (int i = 1; i < tex.width; i++)
|
|
{
|
|
float pct = (float)i / (float)tex.width;
|
|
pixels[i].r = curve.Evaluate(pct);
|
|
range[0] = Mathf.Min(range[0], pixels[i].r);
|
|
range[1] = Mathf.Max(range[1], pixels[i].r);
|
|
}
|
|
tex.SetPixels(pixels);
|
|
tex.Apply();
|
|
|
|
return range;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Sets and Generates the filter <see cref="RenderTexture"/> for transformation brushes and bind the texture to the provided Material.
|
|
/// **Note:** Using this method will enable the Terrain Layer filter
|
|
/// </summary>
|
|
/// <param name="commonUI">The brush's commonUI group.</param>
|
|
/// <param name="brushRender">The brushRender object used for acquiring the heightmap and splatmap texture to blit from.</param>
|
|
/// <param name="destinationRenderTexture">The <see cref="RenderTexture"/> designated as the destination.</param>
|
|
/// <param name="mat">The <see cref="Material"/> to update.</param>
|
|
/// <seealso cref="FilterStack"/>
|
|
/// <seealso cref="FilterContext"/>
|
|
public static void GenerateAndSetFilterRT(IBrushUIGroup commonUI, IBrushRenderUnderCursor brushRender, RenderTexture destinationRenderTexture, Material mat)
|
|
{
|
|
commonUI.GenerateBrushMask(brushRender, destinationRenderTexture);
|
|
mat.SetTexture("_FilterTex", destinationRenderTexture);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Generate the filter render texture for transformation brushes and bind the texture to the provided Material
|
|
/// Sets and Generates the filter <see cref="RenderTexture"/> for transformation brushes and bind the texture to the provided Material.
|
|
/// </summary>
|
|
/// <param name="commonUI">The brush's commonUI group.</param>
|
|
/// <param name="sourceRenderTexture">The <see cref="RenderTexture"/> designated as the source.</param>
|
|
/// <param name="destinationRenderTexture">The <see cref="RenderTexture"/> designated as the destination.</param>
|
|
/// <param name="mat">The <see cref="Material"/> to update.</param>
|
|
/// <seealso cref="FilterStack"/>
|
|
/// <seealso cref="FilterContext"/>
|
|
public static void GenerateAndSetFilterRT(IBrushUIGroup commonUI, RenderTexture sourceRenderTexture, RenderTexture destinationRenderTexture, Material mat)
|
|
{
|
|
commonUI.GenerateBrushMask(sourceRenderTexture, destinationRenderTexture);
|
|
mat.SetTexture("_FilterTex", destinationRenderTexture);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Enable or disable the keyword for the provided Material instance
|
|
/// </summary>
|
|
/// <param name="mat">The material to set.</param>
|
|
/// <param name="keyword">The keyword to enable and disable.</param>
|
|
/// <param name="enabled">Whether to enable or disable the keyword of the material.</param>
|
|
public static void SetMaterialKeyword(Material mat, string keyword, bool enabled)
|
|
{
|
|
if(enabled)
|
|
{
|
|
mat.EnableKeyword(keyword);
|
|
}
|
|
else
|
|
{
|
|
mat.DisableKeyword(keyword);
|
|
}
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Provides mesh utility methods for Terrain.
|
|
/// </summary>
|
|
public static class MeshUtils
|
|
{
|
|
/// <summary>
|
|
/// Sets which shader pass to use when rendering the <see cref="RenderTopdownProjection"/>.
|
|
/// </summary>
|
|
public enum ShaderPass
|
|
{
|
|
/// <summary>
|
|
/// Height shader pass.
|
|
/// </summary>
|
|
Height = 0,
|
|
/// <summary>
|
|
/// Mask shader pass.
|
|
/// </summary>
|
|
Mask = 1,
|
|
}
|
|
|
|
private static Material m_defaultProjectionMaterial;
|
|
/// <summary>
|
|
/// Gets the default projection <see cref="Material"/>.
|
|
/// </summary>
|
|
public static Material defaultProjectionMaterial {
|
|
get
|
|
{
|
|
if (m_defaultProjectionMaterial == null)
|
|
{
|
|
m_defaultProjectionMaterial = new Material(Shader.Find("Hidden/TerrainTools/MeshUtility"));
|
|
}
|
|
|
|
return m_defaultProjectionMaterial;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Converts a <see cref="Matrix4x4"/> into a <see cref="Quaternion"/>.
|
|
/// </summary>
|
|
/// <param name="m">The <see cref="Matrix4x4"/> to convert from.</param>
|
|
/// <returns>Returns a converted <see cref="Quaternion"/>.</returns>
|
|
public static Quaternion QuaternionFromMatrix(Matrix4x4 m)
|
|
{
|
|
// Adapted from: http://www.euclideanspace.com/maths/geometry/rotations/conversions/matrixToQuaternion/index.htm
|
|
Quaternion q = new Quaternion();
|
|
q.w = Mathf.Sqrt(Mathf.Max(0, 1 + m[0, 0] + m[1, 1] + m[2, 2])) / 2;
|
|
q.x = Mathf.Sqrt(Mathf.Max(0, 1 + m[0, 0] - m[1, 1] - m[2, 2])) / 2;
|
|
q.y = Mathf.Sqrt(Mathf.Max(0, 1 - m[0, 0] + m[1, 1] - m[2, 2])) / 2;
|
|
q.z = Mathf.Sqrt(Mathf.Max(0, 1 - m[0, 0] - m[1, 1] + m[2, 2])) / 2;
|
|
q.x *= Mathf.Sign(q.x * (m[2, 1] - m[1, 2]));
|
|
q.y *= Mathf.Sign(q.y * (m[0, 2] - m[2, 0]));
|
|
q.z *= Mathf.Sign(q.z * (m[1, 0] - m[0, 1]));
|
|
return q;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Transforms a <see cref="Bounds"/>.
|
|
/// </summary>
|
|
/// <param name="m">The transformation <see cref="Matrix4x4"/>.</param>
|
|
/// <param name="bounds">The <see cref="Bounds"/> to transform.</param>
|
|
/// <returns>Returns the transformed <see cref="Bounds"/>.</returns>
|
|
public static Bounds TransformBounds(Matrix4x4 m, Bounds bounds)
|
|
{
|
|
Vector3[] points = new Vector3[8];
|
|
|
|
// get points for each corner of the bounding box
|
|
points[0] = new Vector3(bounds.max.x, bounds.max.y, bounds.max.z);
|
|
points[1] = new Vector3(bounds.min.x, bounds.max.y, bounds.max.z);
|
|
points[2] = new Vector3(bounds.max.x, bounds.min.y, bounds.max.z);
|
|
points[3] = new Vector3(bounds.max.x, bounds.max.y, bounds.min.z);
|
|
points[4] = new Vector3(bounds.min.x, bounds.min.y, bounds.max.z);
|
|
points[5] = new Vector3(bounds.min.x, bounds.min.y, bounds.min.z);
|
|
points[6] = new Vector3(bounds.max.x, bounds.min.y, bounds.min.z);
|
|
points[7] = new Vector3(bounds.min.x, bounds.max.y, bounds.min.z);
|
|
|
|
Vector3 min = Vector3.one * float.PositiveInfinity;
|
|
Vector3 max = Vector3.one * float.NegativeInfinity;
|
|
|
|
for (int i = 0; i < points.Length; ++i)
|
|
{
|
|
Vector3 p = m.MultiplyPoint(points[i]);
|
|
|
|
// update min values
|
|
if (p.x < min.x)
|
|
{
|
|
min.x = p.x;
|
|
}
|
|
|
|
if (p.y < min.y)
|
|
{
|
|
min.y = p.y;
|
|
}
|
|
|
|
if (p.z < min.z)
|
|
{
|
|
min.z = p.z;
|
|
}
|
|
|
|
// update max values
|
|
if (p.x > max.x)
|
|
{
|
|
max.x = p.x;
|
|
}
|
|
|
|
if (p.y > max.y)
|
|
{
|
|
max.y = p.y;
|
|
}
|
|
|
|
if (p.z > max.z)
|
|
{
|
|
max.z = p.z;
|
|
}
|
|
}
|
|
|
|
return new Bounds() { max = max, min = min };
|
|
}
|
|
|
|
private static string GetPrettyVectorString(Vector3 v)
|
|
{
|
|
return string.Format("( {0}, {1}, {2} )", v.x, v.y, v.z);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Renders the top down projection of a <see cref="Mesh"/> into a <see cref="RenderTexture"/>.
|
|
/// </summary>
|
|
/// <param name="mesh">The <see cref="Mesh"/> to render.</param>
|
|
/// <param name="model">The transformation <see cref="Matrix4x4"/>.</param>
|
|
/// <param name="destination">The <see cref="RenderTexture"/> designated as the destination.</param>
|
|
/// <param name="mat">The <see cref="Material"/> to update.</param>
|
|
/// <param name="pass">The <see cref="ShaderPass"/> to use.</param>
|
|
public static void RenderTopdownProjection(Mesh mesh, Matrix4x4 model, RenderTexture destination, Material mat, ShaderPass pass)
|
|
{
|
|
RenderTexture prev = RenderTexture.active;
|
|
RenderTexture.active = destination;
|
|
|
|
Bounds modelBounds = TransformBounds(model, mesh.bounds);
|
|
|
|
float nearPlane = (modelBounds.max.y - modelBounds.center.y) * 4;
|
|
float farPlane = (modelBounds.min.y - modelBounds.center.y);
|
|
|
|
Vector3 viewFrom = new Vector3(modelBounds.center.x, modelBounds.center.z, -modelBounds.center.y);
|
|
Vector3 viewTo = viewFrom + Vector3.down;
|
|
Vector3 viewUp = Vector3.forward;
|
|
|
|
// Debug.Log(
|
|
// $@"Bounds =
|
|
// [
|
|
// center: { modelBounds.center }
|
|
// max: { modelBounds.max }
|
|
// extents: { modelBounds.extents }
|
|
// ]
|
|
// nearPlane: { nearPlane }
|
|
// farPlane: { farPlane }
|
|
// diff: { nearPlane - farPlane }
|
|
// view: [ from = { GetPrettyVectorString( viewFrom ) }, to = { GetPrettyVectorString( viewTo ) }, up = { GetPrettyVectorString( viewUp ) } ]"
|
|
// );
|
|
|
|
// reset the view to accomodate for the transformed bounds
|
|
Matrix4x4 view = Matrix4x4.LookAt(viewFrom, viewTo, viewUp);
|
|
Matrix4x4 proj = Matrix4x4.Ortho(-1, 1, -1, 1, nearPlane, farPlane);
|
|
Matrix4x4 mvp = proj * view * model;
|
|
|
|
GL.Clear(true, true, Color.black);
|
|
|
|
mat.SetMatrix("_Matrix_M", model);
|
|
mat.SetMatrix("_Matrix_MV", view * model);
|
|
mat.SetMatrix("_Matrix_MVP", mvp);
|
|
|
|
mat.SetPass((int)pass);
|
|
GL.PushMatrix();
|
|
{
|
|
Graphics.DrawMeshNow(mesh, Matrix4x4.identity);
|
|
}
|
|
GL.PopMatrix();
|
|
|
|
RenderTexture.active = prev;
|
|
}
|
|
}
|
|
}
|