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#if UNITY_EDITOR
using System;
using System.Collections.Generic;
using System.Linq;
using UnityEditor;
using UnityEditor.SceneManagement;
using UnityEngine;
using UnityEngine.Rendering;
#endif
namespace pi.LTCGI
{
#if UNITY_EDITOR
public partial class LTCGI_Controller
{
public bool PrecomputeOnBuild = true;
private Texture2D[] CreateLODs(Texture2D input, int width, int height)
{
var result = new Texture2D[4];
// apply gamma to lod0 too and resize it
var rt0 = new RenderTexture(width, height, 0, RenderTextureFormat.ARGB32, RenderTextureReadWrite.sRGB);
rt0.wrapMode = TextureWrapMode.Clamp;
Graphics.Blit(input, rt0);
result[0] = ReadIntoTexture2D(rt0);
RenderTexture.DestroyImmediate(rt0);
var CustomRenderTextureCenters = new Vector4[1];
CustomRenderTextureCenters[0] = new Vector4(0.5f, 0.5f, 0, 0);
LOD1.material.SetVectorArray("CustomRenderTextureCenters", CustomRenderTextureCenters);
var CustomRenderTextureSizesAndRotations = new Vector4[1];
CustomRenderTextureSizesAndRotations[0] = new Vector4(1, 1, 0, 0);
LOD1.material.SetVectorArray("CustomRenderTextureSizesAndRotations", CustomRenderTextureSizesAndRotations);
for (int i = 0; i < 3; i++)
{
var crt = new CustomRenderTexture[] { LOD1, LOD2, LOD3 } [i];
var crtS = new CustomRenderTexture[] { LOD1s, LOD2s, LOD3s } [i];
var origTex = crt.material.GetTexture("_MainTex");
var origTexS = crtS.material.GetTexture("_MainTex");
crtS.material.SetTexture("_MainTex", result[i]);
var rt = new RenderTexture(width/Mathf.NextPowerOfTwo((i+1)*2), height/Mathf.NextPowerOfTwo((i+1)*2), 0, RenderTextureFormat.ARGB32, RenderTextureReadWrite.Linear);
rt.wrapMode = TextureWrapMode.Clamp;
Graphics.Blit(result[i], rt, crtS.material, 0);
var rt2 = new RenderTexture(rt.width, rt.height, 0, RenderTextureFormat.ARGB32, RenderTextureReadWrite.Linear);
rt.wrapMode = TextureWrapMode.Clamp;
crt.material.SetTexture("_MainTex", rt);
Graphics.Blit(rt, rt2, crt.material, 1);
result[i + 1] = ReadIntoTexture2D(rt2);
crt.material.SetTexture("_MainTex", origTex);
crtS.material.SetTexture("_MainTex", origTexS);
RenderTexture.DestroyImmediate(rt);
RenderTexture.DestroyImmediate(rt2);
}
return result;
}
[MenuItem("Tools/LTCGI/Precompute Static Textures")]
public static void CreateLODTextureArraysMenu() => LTCGI_Controller.Singleton?.CreateLODTextureArrays();
public void CreateLODTextureArrays()
{
var curscene = EditorSceneManager.GetActiveScene().name;
if (StaticTextures == null || StaticTextures.Length == 0)
{
for (int lod = 0; lod < 4; lod++)
{
try
{
AssetDatabase.DeleteAsset("Assets/LTCGI-Generated/lod-" + curscene + "-" + lod + ".asset");
}
catch {}
}
return;
}
EditorUtility.DisplayProgressBar("LTCGI: Precomputing Static Textures", "Calculating LODs...", 0.0f);
try
{
// Create LODs by applying blur shader
var inputLods = new Texture2D[StaticTextures.Length, 4];
var width = Mathf.ClosestPowerOfTwo(StaticTextures.Max(x => x.width));
var height = Mathf.ClosestPowerOfTwo(StaticTextures.Max(x => x.height));
for (int i = 0; i < StaticTextures.Length; i++)
{
var lods = CreateLODs(StaticTextures[i], width, height);
inputLods[i, 0] = lods[0];
inputLods[i, 1] = lods[1];
inputLods[i, 2] = lods[2];
inputLods[i, 3] = lods[3];
EditorUtility.DisplayProgressBar("LTCGI: Precomputing Static Textures", "Calculating LODs...", 0.5f * ((float)i / (float)StaticTextures.Length));
}
EditorUtility.DisplayProgressBar("LTCGI: Precomputing Static Textures", "Generating Texture Arrays...", 0.5f);
// Fill into compressed Texture2DArrays
for (int lod = 0; lod < 4; lod++)
{
Texture2DArray texture2DArray = new Texture2DArray(
inputLods[0, lod].width,
inputLods[0, lod].height,
StaticTextures.Length,
TextureFormat.BC7, true, false);
texture2DArray.wrapMode = TextureWrapMode.Clamp;
for (int i = 0; i < StaticTextures.Length; i++)
{
SetTextureImporterFormat(inputLods[i, lod], true);
Texture2D temp = new Texture2D(texture2DArray.width, texture2DArray.height, TextureFormat.RGBA32, true, true);
temp.wrapMode = TextureWrapMode.Clamp;
temp.SetPixels32(inputLods[i, lod].GetPixels32(0));
temp.Apply();
EditorUtility.CompressTexture(temp, TextureFormat.BC7, UnityEditor.TextureCompressionQuality.Best);
temp.Apply();
for (int mip = 0; mip < temp.mipmapCount; mip++) {
Graphics.CopyTexture(temp, 0, mip, texture2DArray, i, mip);
}
Texture2D.DestroyImmediate(temp);
}
// Save as asset
if (!AssetDatabase.IsValidFolder("Assets/LTCGI-Generated"))
AssetDatabase.CreateFolder("Assets", "LTCGI-Generated");
AssetDatabase.CreateAsset(texture2DArray, "Assets/LTCGI-Generated/lod-" + curscene + "-" + lod + ".asset");
EditorUtility.DisplayProgressBar("LTCGI: Precomputing Static Textures", "Generating Texture Arrays...", 0.5f + 0.5f * (lod / 3.0f));
}
AssetDatabase.SaveAssets();
AssetDatabase.Refresh();
}
catch (Exception ex)
{
Debug.LogError(ex);
}
finally
{
EditorUtility.ClearProgressBar();
}
UpdateMaterials();
}
}
#endif
}
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