///////////////////////////////////////////////////////////////////////////////
//
//      ##  ######
//       ######  ###
//  ## ###############        Shark 3D Engine (www.shark3d.com)
//   ########## # # #
//    ########                Copyright (c) 1996-2006 Spinor GmbH.
//   ######### # # #          All rights reserved.
//  ##   ##########
//      ##
//
///////////////////////////////////////////////////////////////////////////////

uniform vec4 tex0RcpSize;
uniform vec4 passInfo;

varying vec2 screen;
varying vec2 scale;

///////////////////////////////////////////////////////////////////////////////

void main(void)
{
    // Transform position to clip space
    gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;

    // Smoothing parameters:
    // Go from wide to small to avoid artifacts in case of depth jumps.
    // Use pow(2,iter) instead of pow(3,iter), 
    // because this gives a better quality:
    float iter = passInfo.x;
    float smooth = exp2(iter);
    
    screen.xy = gl_MultiTexCoord0.xy;
    scale.xy = tex0RcpSize.xy * smooth;
}

///////////////////////////////////////////////////////////////////////////////