From 5bbf741cf03a08d676cb11b9a213522d0f48114a Mon Sep 17 00:00:00 2001
From: yuanjiajia <1139393632@qq.com>
Date: Wed, 7 Jun 2023 15:47:06 +0800
Subject: [PATCH] =?UTF-8?q?=20=E6=B8=B2=E6=9F=93=E6=B5=8B=E5=BC=8F=20?=
 =?UTF-8?q?=E6=A1=88=E4=BE=8B=20=E5=BC=80=E5=8F=91?=
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---
 src/utils/MatHelper.php | 25 ++++++++++++++-----------
 1 file changed, 14 insertions(+), 11 deletions(-)

diff --git a/src/utils/MatHelper.php b/src/utils/MatHelper.php
index c6fae71..9b73b02 100644
--- a/src/utils/MatHelper.php
+++ b/src/utils/MatHelper.php
@@ -69,13 +69,16 @@ class MatHelper{
             $material->setBaseColor($albedoTexture);
         }
         if($matOriginal->matParams->metallicTexture){
-            $textureUrl = $matOriginal->matParams->metallicTexture;
-            $textureSavaPath = $downloadDir.basename($textureUrl);
-            $textureHandle = fopen($textureSavaPath, "w");
-            (new Client())->get($textureUrl, [RequestOptions::SINK => $textureHandle]);
-
-            $metalnessTextureSavaPath = $downloadDir.'metalness_'.basename($textureUrl);
-            $metalnessTexture = new Imagick($textureSavaPath);
+            $metallicTextureUrl = $matOriginal->matParams->metallicTexture;
+            $metallicTextureSavaPath = $downloadDir.basename($metallicTextureUrl);
+            $metallicTextureHandle = fopen($metallicTextureSavaPath, "w");
+            (new Client())->get($metallicTextureUrl, [RequestOptions::SINK => $metallicTextureHandle]);
+
+            $fileName = preg_replace('/(\.[^\.]+)$/','',basename($metallicTextureUrl));
+            $suffixName = preg_replace('/^('.$fileName.')+/','',basename($metallicTextureUrl));
+            // 从金属纹理中 分离 蓝色通道 作为 金属度纹理
+            $metalnessTextureSavaPath = $downloadDir.$fileName.'_metalness'.$suffixName;
+            $metalnessTexture = new Imagick($metallicTextureSavaPath);
             $metalnessTexture->separateImageChannel(Imagick::CHANNEL_BLUE);
             $metalnessTexture->writeImage($metalnessTextureSavaPath);
             $metalnessTexture = new ImageMap(
@@ -84,10 +87,10 @@ class MatHelper{
             $metalnessTexture->mapping = $mapping;
             $scene->registerTexture($metalnessTexture);
             $material->setMetallic($metalnessTexture);
-
-            $roughnessTextureSavaPath = $downloadDir.'roughness'.basename($textureUrl);
-            $roughnessTexture = new Imagick($textureSavaPath);
-            $roughnessTexture->separateImageChannel(Imagick::CHANNEL_BLUE);
+            // 从金属纹理中 分离 绿色通道 作为 粗糙度纹理
+            $roughnessTextureSavaPath = $downloadDir.$fileName.'_roughness'.$suffixName;
+            $roughnessTexture = new Imagick($metallicTextureSavaPath);
+            $roughnessTexture->separateImageChannel(Imagick::CHANNEL_GREEN);
             $roughnessTexture->writeImage($roughnessTextureSavaPath);
             $roughnessTexture = new ImageMap(
                 ['file' => $roughnessTextureSavaPath]