Changeset 2830 for GTP

Timestamp:

07/10/08 18:39:50 (16 years ago)

Author:

mattausch

Message:

 

Location:

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

Files:

• chcdemo.cpp (modified) (5 diffs)
• default.env (modified) (1 diff)
• shaders/deferred.cg (modified) (2 diffs)

GTP/trunk/App/Demos/Vis/FriendlyCulling/src/chcdemo.cpp

@@ -291 +291 @@
         int returnCode = 0;
 
+        cout << "=== reading environment file === " << endl;
+
         env.Read("src/default.env");
 
@@ -304 +306 @@
 
         env.GetBoolParam(string("useFullScreen"), useFullScreen);
-
         //env.GetIntParam(string("numSssaoSamples"), numSsaoSamples);
 
@@ -310 +311 @@
         env.GetVectorParam(string("camPosition"), camPos);
 
-        cout << "read values: " << endl;
         cout << "assumedVisibleFrames: " << assumedVisibleFrames << endl; 
         cout << "maxBatchSize: " << maxBatchSize << endl;
@@ -1972 +1972 @@
 }
 
-
+#if 0
+// kustls magic sample positions
 void GenerateSamples()
+{
+        static const float mysamples[] =
+        { 
+                -0.326212f, -0.405805f,
+                -0.840144f, -0.07358f,
+                -0.695914f, 0.457137f,
+                -0.203345f, 0.620716,
+                0.96234f, -0.194983f,
+                0.473434f, -0.480026f,
+                0.519456, 0.767022f,
+                0.185461f, -0.893124f,
+                0.507431f, 0.064425f,
+                0.89642f, 0.412458f,
+                -0.32194f, -0.932615f,
+                -0.791559f, -0.597705f,
+                0.326212f, 0.405805f,
+                0.840144f, 0.07358f,
+                0.695914f, -0.457137f,
+                0.203345f, -0.620716,
+                -0.96234f, 0.194983f,
+                -0.473434f, 0.480026f,
+                -0.519456, -0.767022f,
+                -0.185461f, 0.893124f,
+                -0.507431f, -0.064425f,
+                -0.89642f, -0.412458f,
+                0.32194f, 0.932615f,
+                0.791559f, 0.597705f
+        };
+
+        for (int i = 0; i < NUM_SAMPLES; ++ i)
+        {
+                samples[i] = mysamples[i];
+        }
+}
+
+#else
+
+/*void GenerateSamples()
 {
         float scale = 1.0f / (float)NUM_SAMPLES;
@@ -2002 +2041 @@
                 //cout << samples[i] << " " << samples[i + 1] << endl;
         }
-}
+}*/
+
+void GenerateSamples()
+{
+        // generates poisson distribution on disc
+        float factor = 1.0f;
+        float minDist = factor * sqrt((float)NUM_SAMPLES) / 2;
+
+        cout << "minDist= " << minDist << endl;
+
+        for (int i = 0; i < NUM_SAMPLES; i += 2)
+        {
+                int tries = 0;
+
+                // repeat until valid sample was found
+                while (1)
+                {
+
+                        ++ tries;
+
+                        const float rx = RandomValue(-1, 1);
+                        const float ry = RandomValue(-1, 1);
+
+                        // check if in disk, else exit early
+                        if (rx * rx + ry * ry > 1)
+                                continue;
+
+                        bool sampleValid = true;
+
+                        // check poisson property
+                        for (int j = 0; ((j < i) && sampleValid); j += 2)
+                        {
+                                const float dist = 
+                                        sqrt((samples[j] - rx) * (samples[j] - rx) +
+                                             (samples[j + 1] - ry) * (samples[j + 1] - ry));
+                        
+                                if (dist < minDist)
+                                        sampleValid = false;
+                        }
+
+                        if (sampleValid)
+                        {
+                                samples[i] = rx;
+                                samples[i + 1]= ry;
+                                break;
+                        }
+
+                        if (tries > 1000)
+                        {
+                                minDist *= 0.9f;
+                                tries = 0;
+                        }
+                }
+                cout << "sample: " << samples[i] << " " << samples[i + 1] << " r: " << sqrt(samples[i] * samples[i]  + samples[i + 1] * samples[i + 1]) << " tries: " << tries << endl;
+        }
+
+        cout << "minDist= " << minDist << endl;
+}
+
+
+#endif
 
 

GTP/trunk/App/Demos/Vis/FriendlyCulling/src/default.env

@@ -10 +10 @@
 winHeight=768
 camPosition=483.398f 242.364f 186.078f
-useFullScreen=false
+useFullScreen=0
 numSsaoSamples=8
 

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

@@ -4 +4 @@
 
 #define NUM_SAMPLES 8
-#define SAMPLE_INTENSITY 0.5f
-//#define SAMPLE_INTENSITY 0.7f
+//#define SAMPLE_INTENSITY 0.5f
+//#define SAMPLE_INTENSITY 1.1f
+#define SAMPLE_INTENSITY 0.7f
 #define AREA_SIZE 5e-1f
-
-// kustls magic sample positions
-/*static const float2 samples[NUM_SAMPLES] =
-{
-  {-0.326212f, -0.405805f},
-  {-0.840144f, -0.07358f},
-  {-0.695914f, 0.457137f},
-  {-0.203345f, 0.620716},
-  {0.96234f, -0.194983f},
-  {0.473434f, -0.480026f},
-  {0.519456, 0.767022f},
-  {0.185461f, -0.893124f},
-  {0.507431f, 0.064425f},
-  {0.89642f, 0.412458f},
-  {-0.32194f, -0.932615f},
-  {-0.791559f, -0.597705f},
-  {0.326212f, 0.405805f},
-  {0.840144f, 0.07358f},
-  {0.695914f, -0.457137f},
-  {0.203345f, -0.620716},
-  {-0.96234f, 0.194983f},
-  {-0.473434f, 0.480026f},
-  {-0.519456, -0.767022f},
-  {-0.185461f, 0.893124f},
-  {-0.507431f, -0.064425f},
-  {-0.89642f, -0.412458f},
-  {0.32194f, 0.932615f},
-  {0.791559f, 0.597705f}
-};*/
 
 
@@ -119 +91 @@
     float cos_angle = dot(direction_to_sample, currentNormal);
     cos_angle = max(cos_angle, 0.0f);
-    cos_angle *= cos_angle;
+    // take quadratic influence to sharpen contrast
+    //cos_angle *= cos_angle;
 
     // distance between current position and sample position controls AO intensity.