1 files changed, 49 insertions, 8 deletions
diff --git a/indra/newview/app_settings/shaders/class1/objects/previewV.glsl b/indra/newview/app_settings/shaders/class1/objects/previewV.glsl
index 5dcfa87066..7f3f84398b 100644
--- a/indra/newview/app_settings/shaders/class1/objects/previewV.glsl
+++ b/indra/newview/app_settings/shaders/class1/objects/previewV.glsl
@@ -32,12 +32,51 @@ ATTRIBUTE vec3 position;
 ATTRIBUTE vec3 normal;
 ATTRIBUTE vec2 texcoord0;
 
+uniform vec4 color;
+
 VARYING vec4 vertex_color;
 VARYING vec2 vary_texcoord0;
 
+uniform vec4 light_position[8];
+uniform vec3 light_direction[8];
+uniform vec3 light_attenuation[8]; 
+uniform vec3 light_diffuse[8];
+
+//===================================================================================================
+//declare these here explicitly to separate them from atmospheric lighting elsewhere to work around
+//drivers that are picky about functions being declared but not defined even if they aren't called
+float calcDirectionalLight(vec3 n, vec3 l)
+{
+	float a = max(dot(n,l),0.0);
+	return a;
+}
+
+
+float calcPointLightOrSpotLight(vec3 v, vec3 n, vec4 lp, vec3 ln, float la, float is_pointlight)
+{
+	//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);
+	
+	// spotlight coefficient.
+	float spot = max(dot(-ln, lv), is_pointlight);
+	da *= spot*spot; // GL_SPOT_EXPONENT=2
+
+	//angular attenuation
+	da *= calcDirectionalLight(n, lv);
+
+	return da;	
+}
+//====================================================================================================
 
-vec4 calcLighting(vec3 pos, vec3 norm, vec4 color, vec4 baseCol);
-void calcAtmospherics(vec3 inPositionEye);
 
 void main()
 {
@@ -45,13 +84,15 @@ void main()
 	vec4 pos = (modelview_matrix * vec4(position.xyz, 1.0));
 	gl_Position = modelview_projection_matrix * vec4(position.xyz, 1.0);
 	vary_texcoord0 = (texture_matrix0 * vec4(texcoord0,0,1)).xy;
-		
+	
 	vec3 norm = normalize(normal_matrix * normal);
 
-	calcAtmospherics(pos.xyz);
-
-	vec4 color = calcLighting(pos.xyz, norm, vec4(1,1,1,1), vec4(0.));
-	vertex_color = color;
+	vec4 col = vec4(0,0,0,1);
 
-	
+	// Collect normal lights (need to be divided by two, as we later multiply by 2)
+	col.rgb += light_diffuse[1].rgb * calcDirectionalLight(norm, light_position[1].xyz);
+	col.rgb += light_diffuse[2].rgb*calcPointLightOrSpotLight(pos.xyz, norm, light_position[2], light_direction[2], light_attenuation[2].x, light_attenuation[2].z);
+	col.rgb += light_diffuse[3].rgb*calcPointLightOrSpotLight(pos.xyz, norm, light_position[3], light_direction[3], light_attenuation[3].x, light_attenuation[3].z);
+		
+	vertex_color = col*color;
 }