修改了

app/src/main/assets/shaders/texture.frag

@@ -1,4 +1,4 @@
-#version 450
+#version 450
 
 layout (binding = 1) uniform sampler2D samplerColor;
 layout (binding = 2) uniform sampler2D samplerColor_ex;
@@ -18,21 +18,14 @@ void main()
 
 	vec4 textureColor = color;
 
-	//if (textureColor.a < 0.1) 
-	//{
-        //textureColor = vec4(0.2, 0.2, 0.2, 0.5); 
-	//	discard;
-    //}
-
-	// ¼ÆËãÓë (0,0,1) µÄµã³Ë
+	// 计算与 (0,0,1) 的点乘
     float ndot = dot(N, vec3(0.0, 0.0, -1.0));
 
-	// ±£Ö¤½á¹û >= 0
+	// 保证结果 >= 0
     ndot = max(ndot, 0.0);
 	
 	vec4 blendedColor = mix(color_ex, color, ndot);
 
 	outFragColor = blendedColor;
 
-//	outFragColor = vec4(1, 0, 0, 1);
 }