/usr/share/games/adanaxisgpl/mushruby/MushShaderLibrary.rb is in adanaxisgpl-data 1.2.5.dfsg.1-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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##############################################################################
#
# File data-adanaxis/mushruby/MushShaderLibrary.rb
#
# Author Andy Southgate 2006-2007
#
# This file contains original work by Andy Southgate. The author and his
# employer (Mushware Limited) irrevocably waive all of their copyright rights
# vested in this particular version of this file to the furthest extent
# permitted. The author and Mushware Limited also irrevocably waive any and
# all of their intellectual property rights arising from said file and its
# creation that would otherwise restrict the rights of any party to use and/or
# distribute the use of, the techniques and methods used herein. A written
# waiver can be obtained via http://www.mushware.com/.
#
# This software carries NO WARRANTY of any kind.
#
##############################################################################
#%Header } gw5NodI1qjHLm6c8kWJMrA
# $Id: MushShaderLibrary.rb,v 1.2 2007/03/13 21:45:03 southa Exp $
# $Log
class MushShaderLibrary < MushObject
#
# Default 4D vertex shader
#
def self.cVertex4D
<<EOS
// Standard 4D vertex shader
uniform vec4 mush_ProjectionOffset;
uniform vec4 mush_ModelViewOffset;
uniform vec4 mush_ModelViewProjectionOffset;
uniform float mush_FValue;
varying float mush_ZDiscrim;
void main(void)
{
gl_TexCoord[0] = gl_MultiTexCoord0;
vec4 eyePos = mush_ModelViewOffset + gl_ModelViewMatrix * gl_Vertex;
if (eyePos.w >= 0.0)
{
mush_ZDiscrim = -eyePos.z * mush_FValue / eyePos.w;
}
else
{
mush_ZDiscrim = eyePos.z * mush_FValue / eyePos.w;
}
gl_Position = mush_ModelViewProjectionOffset + gl_ModelViewProjectionMatrix * gl_Vertex;
}
EOS
end
#
# Default 4D fragment shader
#
def self.cFragment4D
<<EOS
// Standard 4D fragment shader
uniform vec4 mush_Colour0;
uniform vec4 mush_Colour1;
uniform vec4 mush_Colour2;
varying float mush_ZDiscrim;
uniform sampler2D tex;
void main(void)
{
vec4 texColor = texture2D(tex, gl_TexCoord[0].st);
vec4 hintColour;
if (mush_ZDiscrim < 0.0)
{
hintColour = mix(mush_Colour1, mush_Colour0, -mush_ZDiscrim);
}
else
{
hintColour = mix(mush_Colour1, mush_Colour2, mush_ZDiscrim);
}
gl_FragColor = texColor * hintColour;
}
EOS
end
#
# Standard shader definitions
#
def self.cStandardCreate
# Standard OpenGL pipeline
MushGLShader.new(
:name => 'standard'
)
shader = MushGLShader.new(
:name => 'project4d',
:vertex_shader => cVertex4D,
:fragment_shader => cFragment4D
)
end
def self.cCreate
cStandardCreate
end
end
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