From 75d6e89876f74406e75a3aa5575148dfdd6e3b0d Mon Sep 17 00:00:00 2001
From: Robert Beckebans <robert.beckebans@gmail.com>
Date: Wed, 14 May 2014 18:57:53 +0200
Subject: [PATCH] Made interactionSM shader sampler loop to use
 r_shadowMapSamples many iterations

---
 base/renderprogs/interactionSM.pixel | 41 +++++-----------------------
 1 file changed, 7 insertions(+), 34 deletions(-)

diff --git a/base/renderprogs/interactionSM.pixel b/base/renderprogs/interactionSM.pixel
index c8c1d5b7..2e6b18c9 100644
--- a/base/renderprogs/interactionSM.pixel
+++ b/base/renderprogs/interactionSM.pixel
@@ -202,46 +202,19 @@ void main( PS_IN fragment, out PS_OUT result )
 
 	// multiple taps
 	
-#if 0
-	const float2 poissonDisk2[12] = float2[](
-        float2(-0.326,-0.406),
-	    float2(-0.840,-0.074),
-	    float2(-0.696, 0.457),
-	    float2(-0.203, 0.621),
-	    float2( 0.962,-0.195),
-	    float2( 0.473,-0.480),
-	    float2( 0.519, 0.767),
-	    float2( 0.185,-0.893),
-	    float2( 0.507, 0.064),
-	    float2( 0.896, 0.412),
-	    float2(-0.322,-0.933),
-	    float2(-0.792,-0.598)
-    );
-	float shadow = 0.0;
-	
-	float shadowTexelSize = ( 1.0 / 1024.0 ) * 0.5;
-    for( int i = 0; i < 12; i++ )
-    {
-        int index = int( rand( shadowTexcoord.xy * 1.0 ) * 12 );
-        
-		float4 shadowTexcoordOffset = float4( shadowTexcoord.xy + poissonDisk2[index] * shadowTexelSize, shadowTexcoord.z, shadowTexcoord.w );
-       
-        shadow += texture( samp5, shadowTexcoordOffset.xywz);
-    }
-
-    shadow *= ( 1.0 / 12.0 );
-	
-#elif 1
+#if 1
 	float4 base = shadowTexcoord;
 	
 	base.xy += rpJitterTexScale.xy * -0.5;
 	
 	float shadow = 0.0;
 	
-	float stepSize = 1.0 / 16.0;
+	//float stepSize = 1.0 / 16.0;
+	float numSamples = rpScreenCorrectionFactor.w;
+	float stepSize = 1.0 / numSamples;
 	
 	float4 jitterTC = ( fragment.position * rpScreenCorrectionFactor ) + rpJitterTexOffset;
-	for( int i = 0; i < 16; i++ )
+	for( float i = 0.0; i < numSamples; i += 1.0 )
 	{
 		float4 jitter = base + tex2D( samp6, jitterTC.xy ) * rpJitterTexScale;
 		jitter.zw = shadowTexcoord.zw;
@@ -250,8 +223,8 @@ void main( PS_IN fragment, out PS_OUT result )
 		jitterTC.x += stepSize;
 	}
 	
-	shadow *= ( 1.0 / 16.0 );
-#else	
+	shadow *= stepSize;
+#else
 	float shadow = texture( samp5, shadowTexcoord.xywz );
 #endif