From 8e20dab9326ed09aaec6a0b02af0b020975f23d7 Mon Sep 17 00:00:00 2001
From: ouv <ouv@opencascade.com>
Date: Mon, 10 Oct 2005 16:24:21 +0000
Subject: [PATCH] Improved.

---
 resources/Vertex_Program_ARB.txt | 72 +-------------------------------
 1 file changed, 1 insertion(+), 71 deletions(-)

diff --git a/resources/Vertex_Program_ARB.txt b/resources/Vertex_Program_ARB.txt
index 3773961e..104e9aa8 100755
--- a/resources/Vertex_Program_ARB.txt
+++ b/resources/Vertex_Program_ARB.txt
@@ -1,79 +1,10 @@
-// simple vertex shader
-
-attribute float attrib1;
-attribute float attrib2;
-attribute float attrib3;
-
 attribute float results;
 attribute float clamp;
 attribute float geomSize;
-attribute float attrib4;
 attribute float minSize;
 attribute float maxSize;
 attribute float magnification;
 
-float3 ComputePointSize( float3 inColor )
-{
-  float a1 = attrib1;
-  float a2 = attrib2;
-  float a3 = attrib3;
-  float a4 = attrib4;
-
-  int r = inColor.x * 255;
-  int g = inColor.y * 255;
-  int b = inColor.z * 255;
-  int h = 0;
-
-  int max = r;
-  int whatmax = 0;
-  if( g > max )
-  {
-    max = g;
-    whatmax = 1;
-  }
-  if( b > max )
-  {
-    max = b;
-    whatmax = 2;
-  }
-  int min = r;
-  if ( g < min ) min = g;
-  if ( b < min ) min = b;
-  int delta = max-min;
-
-  if( delta == 0 )
-  {
-    h = 0;
-  }
-  else if( whatmax == 0 )
-  {
-    if ( g >= b )
-      h = (120*(g-b)+delta)/(2*delta);
-    else
-      h = (120*(g-b+delta)+delta)/(2*delta) + 300;
-  }
-  else if( whatmax == 1 )
-  {
-    if ( b > r )
-      h = 120 + (120*(b-r)+delta)/(2*delta);
-    else
-      h = 60 + (120*(b-r+delta)+delta)/(2*delta);
-  }
-  else
-  {
-    if ( r > g )
-      h = 240 + (120*(r-g)+delta)/(2*delta);
-    else
-      h = 180 + (120*(r-g+delta)+delta)/(2*delta);
-  }
-
-  //minSize = 15.0;
-  //maxSize = 40.0;
-  float size = minSize + ( maxSize - minSize ) * ( 1 - h / 256.0f );
-
-  return size;
-}
-
 void main()
 {
   gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;
@@ -82,10 +13,9 @@ void main()
 
   float size;
   if( results == 1 )
-    size = ComputePointSize( gl_Color );
+    size = minSize + ( maxSize - minSize ) * ( 1 - gl_Color.w / 241.0f );
   else
     size = geomSize;
 
-  //clamp = 100.0;
   gl_PointSize = min( magnification * size * gl_ProjectionMatrix[0].x, clamp );
 }
-- 
2.39.2