Edited render-mx-anisotropic

Author: ThyOwen

testsuite/render-mx-anisotropic-vdf/emitter.osl

@@ -5,19 +5,27 @@
 
 surface
 emitter
-    [[ string description = "Lambertian emitter material" ]]
+    [[ string description = "Spot emitter material" ]]
 (
     float power = 1
-        [[  string description = "Total power of the light",
-            float UImin = 0 ]],
+        [[ string description = "Total power of the light",
+           float UImin = 0 ]],
     color Cs = 1
-        [[  string description = "Base color",
-            float UImin = 0, float UImax = 1 ]]
-  )
+        [[ string description = "Base color",
+           float UImin = 0, float UImax = 1 ]],
+    float spread = 90
+        [[ string description = "Spread angle in degrees",
+           float UImin = 1, float UImax = 180 ]]
+)
 {
-    // Because emission() expects a weight in radiance, we must convert by dividing
-    // the power (in Watts) by the surface area and the factor of PI implied by
-    // uniform emission over the hemisphere. N.B.: The total power is BEFORE Cs
-    // filters the color!
-    Ci = (power / (M_PI * surfacearea())) * Cs * emission();
-}
+    vector wo = normalize(I);
+    
+    float cosAngle = dot(N, -wo);
+    
+    float halfSpread = radians(spread * 0.5);
+    float cosThreshold = cos(halfSpread);
+    
+    float falloff = (cosAngle > cosThreshold) ? 1 : 0;
+    
+    Ci = (power / (M_PI * surfacearea())) * Cs * falloff * emission();
+}

testsuite/render-mx-anisotropic-vdf/ref/out.exr

@@ -13,26 +13,24 @@
    <Quad corner="0,100,0" edge_x="100,0,0" edge_y="0,0,150" /> <!-- Top  -->
 
    <ShaderGroup>color Cs 0.35 0.35 0.35; shader matte layer1;</ShaderGroup>
-   <Sphere center="73,16.5,78"        radius="16.5" /> <!-- Grey -->
+   <Sphere center="50,50,70"        radius="25" /> <!-- Grey -->
 
-   <ShaderGroup>float eta 15; shader metal layer1;</ShaderGroup>
-   <Sphere center="27,16.5,47"        radius="16.5" /> <!-- Mirror -->
 
-   <ShaderGroup is_light="yes">float power 26000; shader emitter layer1</ShaderGroup>
+   <ShaderGroup is_light="yes">float power 90000; shader emitter layer1</ShaderGroup>
    <Quad corner="40, 99.99, 40" edge_x="20, 0, 0" edge_y="0, 0, 20" /> <!--Lite -->
 
    <ShaderGroup>
-      param color albedo 0.75 0.75 0.75;
-      param float extinction 0.001;
-      param float anisotropy 0.9;
+      param color albedo 0.85 0.85 0.85;
+      param float extinction 0.01;
+      param float anisotropy 0.25;
 
       shader anisotropic layer1;
    </ShaderGroup>
-   <Quad corner="0,0,0" edge_x="99.9,0,0" edge_y="0,99.9,0" /> <!-- Bottom -->
-   <Quad corner="0,0,0" edge_x="99.9,0,0" edge_y="0,0,149.9" /> <!-- Back -->
-   <Quad corner="0,0,0" edge_x="0,99.9,0" edge_y="0,0,149.9" /> <!-- Left -->
-   <Quad corner="99.9,0,0" edge_x="0,99.9,0" edge_y="0,0,149.9" /> <!-- Right -->
-   <Quad corner="0,99.9,0" edge_x="99.9,0,0" edge_y="0,0,149.9" /> <!-- Front -->
-   <Quad corner="0,0,149.9" edge_x="99.9,0,0" edge_y="0,99.9,0" /> <!-- Top -->   
+   <Quad corner="0,0,0" edge_x="99.99,0,0" edge_y="0,99.99,0" /> <!-- Bottom -->
+   <Quad corner="0,0,0" edge_x="99.99,0,0" edge_y="0,0,149.9" /> <!-- Back -->
+   <Quad corner="0,0,0" edge_x="0,99.99,0" edge_y="0,0,149.9" /> <!-- Left -->
+   <Quad corner="99.99,0,0" edge_x="0,99.99,0" edge_y="0,0,149.9" /> <!-- Right -->
+   <Quad corner="0,99.99,0" edge_x="99.99,0,0" edge_y="0,0,149.9" /> <!-- Front -->
+   <Quad corner="0,0,149.9" edge_x="99.99,0,0" edge_y="0,99.99,0" /> <!-- Top -->   
 
 </World>