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Updated README.

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This commit is contained in:
Branimir Karadžić 2014-05-23 21:24:55 -07:00
parent c4a01b4456
commit 5cb963e9fd
3 changed files with 43 additions and 5 deletions
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5
README.md
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@ -249,10 +249,11 @@ Building
Premake 4.4 beta5 ([prebuilt binaries are part of bx](https://github.com/bkaradzic/bx/tree/master/tools/bin))
[http://industriousone.com/premake/download](http://industriousone.com/premake/download)
GNU make and CoreUtils
Windows users download GNU utilities from:
Windows users download GnuWin32 utilities from:
[http://gnuwin32.sourceforge.net/packages/make.htm](http://gnuwin32.sourceforge.net/packages/make.htm)
[http://gnuwin32.sourceforge.net/packages/coreutils.htm](http://gnuwin32.sourceforge.net/packages/coreutils.htm)
[http://gnuwin32.sourceforge.net/packages/libiconv.htm](http://gnuwin32.sourceforge.net/packages/libiconv.htm)
[http://gnuwin32.sourceforge.net/packages/libintl.htm](http://gnuwin32.sourceforge.net/packages/libintl.htm)
### Getting source

1
examples/21-deferred/deferred.cpp
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@ -278,7 +278,6 @@ int _main_(int /*_argc*/, char** /*_argv*/)
bgfx::UniformHandle s_light = bgfx::createUniform("s_light", bgfx::UniformType::Uniform1iv);
bgfx::UniformHandle u_mtx = bgfx::createUniform("u_mtx", bgfx::UniformType::Uniform4x4fv);
bgfx::UniformHandle u_lightPosRadius = bgfx::createUniform("u_lightPosRadius", bgfx::UniformType::Uniform4fv);
bgfx::UniformHandle u_lightRgbInnerR = bgfx::createUniform("u_lightRgbInnerR", bgfx::UniformType::Uniform4fv);

38
examples/common/shaderlib.sh
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@ -49,6 +49,44 @@ vec3 decodeNormalUint(vec3 _encodedNormal)
return _encodedNormal * 2.0 - 1.0;
}
vec2 encodeNormalSphereMap(vec3 _normal)
{
return normalize(_normal.xy) * sqrt(_normal.z * 0.5 + 0.5);
}
vec3 decodeNormalSphereMap(vec2 _encodedNormal)
{
float zz = dot(_encodedNormal, _encodedNormal) * 2.0 - 1.0;
return vec3(normalize(_encodedNormal.xy) * sqrt(1.0 - zz*zz), zz);
}
// Reference:
// Octahedron normal vector encoding
// http://kriscg.blogspot.com/2014/04/octahedron-normal-vector-encoding.html
vec2 octahedronWrap(vec2 _val)
{
return (1.0 - abs(_val.yx) )
* mix(vec2_splat(-1.0), vec2_splat(1.0), vec2(greaterThanEqual(_val.xy, vec2_splat(0.0) ) ) );
}
vec2 encodeNormalOctahedron(vec3 _normal)
{
_normal /= abs(_normal.x) + abs(_normal.y) + abs(_normal.z);
_normal.xy = _normal.z >= 0.0 ? _normal.xy : octahedronWrap(_normal.xy);
_normal.xy = _normal.xy * 0.5 + 0.5;
return _normal.xy;
}
vec3 decodeNormalOctahedron(vec2 _encodedNormal)
{
_encodedNormal = _encodedNormal * 2.0 - 1.0;
vec3 normal;
normal.z = 1.0 - abs(_encodedNormal.x) - abs(_encodedNormal.y);
normal.xy = normal.z >= 0.0 ? _encodedNormal.xy : octahedronWrap(_encodedNormal.xy);
return normalize(normal);
}
// Reference:
// RGB/XYZ Matrices
// http://www.brucelindbloom.com/index.html?Eqn_RGB_XYZ_Matrix.html