渲染测式 案例 开发

examples/testImage.php

@@ -0,0 +1,37 @@
+<?php
+
+
+
+namespace Blobt\Luxcore\scene;
+
+use Imagick;
+
+include dirname(dirname(__FILE__)) . "/vendor/autoload.php";
+
+const OPEN = true;
+const CLOSE = false;
+
+$imagick = new \Imagick(realpath("/media/yuanjiajia/zhiTai_300GB_P4/LuxcoreModel/normal_maps1.jpg"));
+$imageIterator = $imagick->getPixelIterator();
+
+$ll = 0;
+foreach ($imageIterator as $row => $pixels) {
+    foreach ($pixels as $column => $pixel) {
+        // 获取每个像素色值;
+        $value = $pixel->getColor();
+
+        // 反相绿色通道色值;
+        $r = $value["r"];
+        $g = abs(($value["g"] - 255));
+        $b = $value["b"];
+        $a = $value["a"];
+        $pixel->setColor("rgba({$r}, {$g}, {$b}, {$a})");
+    }
+    $imageIterator->syncIterator();
+}
+
+$imagick->writeImage("/media/yuanjiajia/zhiTai_300GB_P4/LuxcoreModel/normal_maps1-g.jpg");
+
+
+
+?>

src/utils/MatHelper.php

@@ -107,8 +107,31 @@ class MatHelper{
             $textureHandle = fopen($textureSavaPath, "w");
             (new Client())->get($textureUrl, [RequestOptions::SINK => $textureHandle]);
 
+            // 因为 LuxCore 使用 opengl 规范的法线纹理格式，与 babylon 使用的 DirectX 不同，
+            // 所以这里需要反转 G 通道色值,以保证法线纹理应用效果与 babylon 一致。
+            $fileName = preg_replace('/(\.[^\.]+)$/','',basename($textureSavaPath));
+            $suffixName = preg_replace('/^('.$fileName.')+/','',basename($textureSavaPath));
+            $textureInvertGPath = $downloadDir.$fileName.'_InvertG'.$suffixName;
+            $imagick = new \Imagick($textureSavaPath);
+            $imageIterator = $imagick->getPixelIterator();
+            foreach ($imageIterator as $row => $pixels) {
+                foreach ($pixels as $column => $pixel) {
+                    // 获取每个像素色值;
+                    $value = $pixel->getColor();
+                    // 反相绿色通道色值;
+                    $r = $value["r"];
+                    $g = abs(($value["g"] - 255));
+                    $b = $value["b"];
+                    $a = $value["a"];
+                    $pixel->setColor("rgba({$r}, {$g}, {$b}, {$a})");
+                }
+                $imageIterator->syncIterator();
+            }
+            $imagick->writeImage($textureInvertGPath);
+
+
             $bumpTexture = new ImageMap(
-                ['file' => $textureSavaPath]
+                ['file' => $textureInvertGPath]
             );
             $bumpTexture->gamma = 1;
             $bumpTexture->mapping = $mapping;