Changeset 2876

Timestamp:

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

Author:

mattausch

Message:

 

Location:

GTP/trunk/App/Demos/Vis/FriendlyCulling/src/shaders

Files:

• globillum.cg (modified) (1 diff)
• ssao.cg (modified) (5 diffs)

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;

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

@@ -65 +65 @@
         float total_ao = 0.0;
 
-        for (int i = 0; i < NUM_SAMPLES; i ++) 
+        for (int i = 0; i < NUM_SAMPLES; ++ i) 
         {
                 float2 offset = samples[i];
@@ -85 +85 @@
 
                 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);
+                const float cos_angle = max(dot(direction_to_sample, currentNormal), 0.0f);
 
                 // 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 surface normal perpenticular to view dir, some samples probably count less 
                 // => compensate for this
-                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_ao += cos_angle * distance_intensity * view_correction;
@@ -104 +104 @@
 
         return max(0.0f, 1.0f - total_ao);
-        //return dot(currentViewDir, currentNormal);
 }
 
@@ -165 +164 @@
         if ((tex.x >= 0.0f) && (tex.x < 1.0f) && 
                 (tex.y >= 0.0f) && (tex.y < 1.0f) && 
-                (abs(depthDif)  < 1e-3f))
+                (abs(depthDif) < 1e-3f))
         {
                 OUT.illum_col.x = ao * expFactor + oldCol.x * (1.0f - expFactor);
@@ -177 +176 @@
         OUT.illum_col.w = currentDepth;
 
-        //OUT.combined_col = float4(newDepth / oldDepth * 100, 0, 0, 1) ;
-        //OUT.combined_col = float4(newDepth, 0, 0, 1) ;
-
         return OUT;
 }