Second Life viewer sources 1.19.1.0

1 files changed, 34 insertions, 0 deletions

diff --git a/linden/indra/newview/app_settings/shaders/class1/lighting/lightFuncV.glsl b/linden/indra/newview/app_settings/shaders/class1/lighting/lightFuncV.glsl
new file mode 100644
index 0000000..3e8fdfb
--- /dev/null
+++ b/linden/indra/newview/app_settings/shaders/class1/lighting/lightFuncV.glsl
@@ -0,0 +1,34 @@
+/** 
+ * @file lightFuncV.glsl
+ *
+ * Copyright (c) 2007-$CurrentYear$, Linden Research, Inc.
+ * $License$
+ */
+
+
+float calcDirectionalLight(vec3 n, vec3 l)
+{
+        float a = max(dot(n,l),0.0);
+        return a;
+}
+
+float calcPointLight(vec3 v, vec3 n, vec4 lp, float la)
+{
+        //get light vector
+        vec3 lv = lp.xyz-v;
+        
+        //get distance
+        float d = length(lv);
+        
+        //normalize light vector
+        lv *= 1.0/d;
+        
+        //distance attenuation
+        float da = clamp(1.0/(la * d), 0.0, 1.0);
+        
+        //angular attenuation
+        da *= calcDirectionalLight(n, lv);
+        
+        return da;      
+}
+