first step for BlinnPhongPureColor

ShaderLibrary/Std3D/BlinnPhongPureColor.mtl

@@ -1,17 +1,12 @@
-#Material
-Name Blinn-phong shading model only color
-Base Std3D
+#Material
+Name        BlinnPhong+HalfLambert shading model only color
+Reference   https://zhuanlan.zhihu.com/p/442023993
+Base        Std3D
 
-Require LocalToWorld,Camera,Sun
+Require     LocalToWorld,Camera,Sun
 
 #MaterialInstance
 
-Code
-{
-    float Diffuse;
-    float Intensity;
-}
-
 #VertexInput
 vec3 Normal
 
@@ -30,4 +25,40 @@ Code
 }
 
 #Fragment
+Output
+{
+    vec4 FragColor;
+}
 
+Code
+{
+    void main()
+    {
+        //将法线归一化
+        vec3 world_normal           =normalize(Input.Normal);
+
+        //对世界坐标下的灯光方法归一化
+        vec3 world_light_direction  =normalize(sun.direction);
+
+        //点乘法线和光照
+        vec3 diffuse                =0.5*dot(world_light_direction,world_normal)+0.5;
+
+        //直接光颜色
+        vec3 direct_color           =sun.diffuse*diffuse*sun.color;
+
+    #ifndef HAVE_SPECULAR
+        FragColor=vec4(direct_color,1.0);
+    #else
+        //归一代视角方向
+        vec3 view_direction     =normalize(camera.pos-world_position);
+
+        //世界坐标下的反射光方向
+        vec3 reflect_direction  =normalize(reflect(-world_light_direction,world_normal));
+
+        //高光
+        vec3 specular           =sun.specular*pow(saturate(dot(reflect_direction,view_direction)),gloss);
+
+        FragColor=vec4(direct_color+specular,1.0);
+    #endif//HAVE_SPECULAR
+    }
+}

ShaderLibrary/Std3D/MetricCellsGrid.mtl

@@ -9,6 +9,7 @@ vec2 TexCoord
 #MaterialInstance
 Length 120
 Stage  Fragment
+
 Code
 {
     vec4 x_color;
@@ -31,6 +32,7 @@ Output
 {
     vec2 TexCoord
 }
+
 Code
 {
     void main()
@@ -72,12 +74,13 @@ Code
         // ======= AXES
         float xb = step(abs(x) - mi.axis_line_width, 0.0);
         float yb = step(abs(y) - mi.axis_line_width, 0.0);
+
         color.rgb = mix(color.rgb, mi.x_axis_color.rgb, (xb));
         color.rgb = mix(color.rgb, mi.y_axis_color.rgb, (yb));
 
         // ======= CENTER
         float cb = length(vec2(x,y))-mi.center_radius;
-        color.rgb = mix(color.rgb, mi.center_color.rgb, cb>0.0?0.0:smoothstep(0,edge*256.0,abs(cb)));
+        color.rgb = mix(color.rgb, mi.center_color.rgb, cb>0.0?0.0:smoothstep(0,edge*mi.scale.y,abs(cb)));
 
         FragColor=color;
     }