Changeset 2876 for GTP/trunk/App/Demos/Vis/FriendlyCulling/src/shaders/globillum.cg

Timestamp:

08/27/08 20:05:41 (16 years ago)

Author:

mattausch

Message:

 

File:

• GTP/trunk/App/Demos/Vis/FriendlyCulling/src/shaders/globillum.cg (modified) (1 diff)

GTP/trunk/App/Demos/Vis/FriendlyCulling/src/shaders/globillum.cg

@@ -87 +87 @@
 
                 float3 sample_position = tex2Dlod(positions, float4(texcoord, 0, 1)).xyz;
-                float3 sample_color = tex2Dlod(colors, float4(texcoord, 0, 1)).xyz;
+                float3 sample_color = tex2Dlod(colors, float4(texcoord, 0, 2)).xyz;
 
                 float3 vector_to_sample = sample_position - centerPosition.xyz;
-                float length_to_sample = length(vector_to_sample);
+                const float length_to_sample = length(vector_to_sample);
+
                 float3 direction_to_sample = vector_to_sample / length_to_sample;
 
                 // Angle between current normal and direction to sample controls AO intensity.
-                float cos_angle = dot(direction_to_sample, currentNormal);
-                cos_angle = max(cos_angle, 0.0f);
+                float cos_angle = max(dot(direction_to_sample, currentNormal), 0);
 
                 // distance between current position and sample position controls AO intensity.
-                float distance_intensity = 
+                const float distance_intensity = 
                         (SAMPLE_INTENSITY * DISTANCE_SCALE) / (DISTANCE_SCALE + length_to_sample * length_to_sample);
 
                 // if normal perpenticular to view dir, only half of the samples count
-                float view_correction = 1.0f + VIEW_CORRECTION_SCALE * (1.0f - dot(currentViewDir, currentNormal));
+                const float view_correction = 1.0f + VIEW_CORRECTION_SCALE * (1.0f - dot(currentViewDir, currentNormal));
 
                 total_color.w -= cos_angle * distance_intensity * view_correction;