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< title > 0.9.8 API documenation: Geometric functions< / title >
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< div id = "projectname" > 0.9.8 API documenation
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< a href = "#func-members" > Functions< / a > < / div >
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< div class = "title" > Geometric functions< div class = "ingroups" > < a class = "el" href = "a00155.html" > GLM Core< / a > < / div > < / div > < / div >
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< p > These operate on vectors as vectors, not component-wise.
< a href = "#details" > More...< / a > < / p >
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< table class = "memberdecls" >
< tr class = "heading" > < td colspan = "2" > < h2 class = "groupheader" > < a name = "func-members" > < / a >
Functions< / h2 > < / td > < / tr >
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< tr class = "memitem:gafe2cae8cb26fd44be62aee97369d0af8" > < td class = "memTemplParams" colspan = "2" > template< typename T , precision P> < / td > < / tr >
< tr class = "memitem:gafe2cae8cb26fd44be62aee97369d0af8" > < td class = "memTemplItemLeft" align = "right" valign = "top" > GLM_FUNC_DECL tvec3< T, P >   < / td > < td class = "memTemplItemRight" valign = "bottom" > < a class = "el" href = "a00147.html#gafe2cae8cb26fd44be62aee97369d0af8" > cross< / a > (tvec3< T, P > const & x, tvec3< T, P > const & y)< / td > < / tr >
< tr class = "memdesc:gafe2cae8cb26fd44be62aee97369d0af8" > < td class = "mdescLeft" >   < / td > < td class = "mdescRight" > Returns the cross product of x and y. < a href = "a00147.html#gafe2cae8cb26fd44be62aee97369d0af8" > More...< / a > < br / > < / td > < / tr >
< tr class = "separator:gafe2cae8cb26fd44be62aee97369d0af8" > < td class = "memSeparator" colspan = "2" >   < / td > < / tr >
< tr class = "memitem:ga7ca317dde0d7e94d920153554d4a02a8" > < td class = "memTemplParams" colspan = "2" > template< typename T , precision P, template< typename, precision > class vecType> < / td > < / tr >
< tr class = "memitem:ga7ca317dde0d7e94d920153554d4a02a8" > < td class = "memTemplItemLeft" align = "right" valign = "top" > GLM_FUNC_DECL T  < / td > < td class = "memTemplItemRight" valign = "bottom" > < a class = "el" href = "a00147.html#ga7ca317dde0d7e94d920153554d4a02a8" > distance< / a > (vecType< T, P > const & p0, vecType< T, P > const & p1)< / td > < / tr >
< tr class = "memdesc:ga7ca317dde0d7e94d920153554d4a02a8" > < td class = "mdescLeft" >   < / td > < td class = "mdescRight" > Returns the distance betwwen p0 and p1, i.e., length(p0 - p1). < a href = "a00147.html#ga7ca317dde0d7e94d920153554d4a02a8" > More...< / a > < br / > < / td > < / tr >
< tr class = "separator:ga7ca317dde0d7e94d920153554d4a02a8" > < td class = "memSeparator" colspan = "2" >   < / td > < / tr >
< tr class = "memitem:ga7dada304da2ba7dd3376ab4f178c3f6b" > < td class = "memTemplParams" colspan = "2" > template< typename T , precision P, template< typename, precision > class vecType> < / td > < / tr >
< tr class = "memitem:ga7dada304da2ba7dd3376ab4f178c3f6b" > < td class = "memTemplItemLeft" align = "right" valign = "top" > GLM_FUNC_DECL T  < / td > < td class = "memTemplItemRight" valign = "bottom" > < a class = "el" href = "a00147.html#ga7dada304da2ba7dd3376ab4f178c3f6b" > dot< / a > (vecType< T, P > const & x, vecType< T, P > const & y)< / td > < / tr >
< tr class = "memdesc:ga7dada304da2ba7dd3376ab4f178c3f6b" > < td class = "mdescLeft" >   < / td > < td class = "mdescRight" > Returns the dot product of x and y, i.e., result = x * y. < a href = "a00147.html#ga7dada304da2ba7dd3376ab4f178c3f6b" > More...< / a > < br / > < / td > < / tr >
< tr class = "separator:ga7dada304da2ba7dd3376ab4f178c3f6b" > < td class = "memSeparator" colspan = "2" >   < / td > < / tr >
< tr class = "memitem:gaea854e5aec1b5839832ac2dfc7cd3c0d" > < td class = "memTemplParams" colspan = "2" > template< typename T , precision P, template< typename, precision > class vecType> < / td > < / tr >
< tr class = "memitem:gaea854e5aec1b5839832ac2dfc7cd3c0d" > < td class = "memTemplItemLeft" align = "right" valign = "top" > GLM_FUNC_DECL vecType< T, P >   < / td > < td class = "memTemplItemRight" valign = "bottom" > < a class = "el" href = "a00147.html#gaea854e5aec1b5839832ac2dfc7cd3c0d" > faceforward< / a > (vecType< T, P > const & N, vecType< T, P > const & I, vecType< T, P > const & Nref)< / td > < / tr >
< tr class = "memdesc:gaea854e5aec1b5839832ac2dfc7cd3c0d" > < td class = "mdescLeft" >   < / td > < td class = "mdescRight" > If dot(Nref, I) < 0.0, return N, otherwise, return -N. < a href = "a00147.html#gaea854e5aec1b5839832ac2dfc7cd3c0d" > More...< / a > < br / > < / td > < / tr >
< tr class = "separator:gaea854e5aec1b5839832ac2dfc7cd3c0d" > < td class = "memSeparator" colspan = "2" >   < / td > < / tr >
< tr class = "memitem:ga18d45e3d4c7705e67ccfabd99e521604" > < td class = "memTemplParams" colspan = "2" > template< typename T , precision P, template< typename, precision > class vecType> < / td > < / tr >
< tr class = "memitem:ga18d45e3d4c7705e67ccfabd99e521604" > < td class = "memTemplItemLeft" align = "right" valign = "top" > GLM_FUNC_DECL T  < / td > < td class = "memTemplItemRight" valign = "bottom" > < a class = "el" href = "a00147.html#ga18d45e3d4c7705e67ccfabd99e521604" > length< / a > (vecType< T, P > const & x)< / td > < / tr >
< tr class = "memdesc:ga18d45e3d4c7705e67ccfabd99e521604" > < td class = "mdescLeft" >   < / td > < td class = "mdescRight" > Returns the length of x, i.e., sqrt(x * x). < a href = "a00147.html#ga18d45e3d4c7705e67ccfabd99e521604" > More...< / a > < br / > < / td > < / tr >
< tr class = "separator:ga18d45e3d4c7705e67ccfabd99e521604" > < td class = "memSeparator" colspan = "2" >   < / td > < / tr >
< tr class = "memitem:gada9451ec170a36fe53552812b9c03a68" > < td class = "memTemplParams" colspan = "2" > template< typename T , precision P, template< typename, precision > class vecType> < / td > < / tr >
< tr class = "memitem:gada9451ec170a36fe53552812b9c03a68" > < td class = "memTemplItemLeft" align = "right" valign = "top" > GLM_FUNC_DECL vecType< T, P >   < / td > < td class = "memTemplItemRight" valign = "bottom" > < a class = "el" href = "a00147.html#gada9451ec170a36fe53552812b9c03a68" > normalize< / a > (vecType< T, P > const & x)< / td > < / tr >
< tr class = "memdesc:gada9451ec170a36fe53552812b9c03a68" > < td class = "mdescLeft" >   < / td > < td class = "mdescRight" > Returns a vector in the same direction as x but with length of 1. < a href = "a00147.html#gada9451ec170a36fe53552812b9c03a68" > More...< / a > < br / > < / td > < / tr >
< tr class = "separator:gada9451ec170a36fe53552812b9c03a68" > < td class = "memSeparator" colspan = "2" >   < / td > < / tr >
< tr class = "memitem:gab63646fc36b81cf69d3ce123a72f76f2" > < td class = "memTemplParams" colspan = "2" > template< typename genType > < / td > < / tr >
< tr class = "memitem:gab63646fc36b81cf69d3ce123a72f76f2" > < td class = "memTemplItemLeft" align = "right" valign = "top" > GLM_FUNC_DECL genType  < / td > < td class = "memTemplItemRight" valign = "bottom" > < a class = "el" href = "a00147.html#gab63646fc36b81cf69d3ce123a72f76f2" > reflect< / a > (genType const & I, genType const & N)< / td > < / tr >
< tr class = "memdesc:gab63646fc36b81cf69d3ce123a72f76f2" > < td class = "mdescLeft" >   < / td > < td class = "mdescRight" > For the incident vector I and surface orientation N, returns the reflection direction : result = I - 2.0 * dot(N, I) * N. < a href = "a00147.html#gab63646fc36b81cf69d3ce123a72f76f2" > More...< / a > < br / > < / td > < / tr >
< tr class = "separator:gab63646fc36b81cf69d3ce123a72f76f2" > < td class = "memSeparator" colspan = "2" >   < / td > < / tr >
< tr class = "memitem:gab7e7cdf4403931a5f7b74560ad64159b" > < td class = "memTemplParams" colspan = "2" > template< typename T , precision P, template< typename, precision > class vecType> < / td > < / tr >
< tr class = "memitem:gab7e7cdf4403931a5f7b74560ad64159b" > < td class = "memTemplItemLeft" align = "right" valign = "top" > GLM_FUNC_DECL vecType< T, P >   < / td > < td class = "memTemplItemRight" valign = "bottom" > < a class = "el" href = "a00147.html#gab7e7cdf4403931a5f7b74560ad64159b" > refract< / a > (vecType< T, P > const & I, vecType< T, P > const & N, T eta)< / td > < / tr >
< tr class = "memdesc:gab7e7cdf4403931a5f7b74560ad64159b" > < td class = "mdescLeft" >   < / td > < td class = "mdescRight" > For the incident vector I and surface normal N, and the ratio of indices of refraction eta, return the refraction vector. < a href = "a00147.html#gab7e7cdf4403931a5f7b74560ad64159b" > More...< / a > < br / > < / td > < / tr >
< tr class = "separator:gab7e7cdf4403931a5f7b74560ad64159b" > < td class = "memSeparator" colspan = "2" >   < / td > < / tr >
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< / table >
< a name = "details" id = "details" > < / a > < h2 class = "groupheader" > Detailed Description< / h2 >
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< p > These operate on vectors as vectors, not component-wise. < / p >
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< h2 class = "groupheader" > Function Documentation< / h2 >
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< a class = "anchor" id = "gafe2cae8cb26fd44be62aee97369d0af8" > < / a >
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< td class = "memname" > GLM_FUNC_DECL tvec3< T, P> glm::cross < / td >
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< td > (< / td >
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< td class = "paramtype" > tvec3< T, P > const &   < / td >
< td class = "paramname" > < em > x< / em > , < / td >
< / tr >
< tr >
< td class = "paramkey" > < / td >
< td > < / td >
< td class = "paramtype" > tvec3< T, P > const &   < / td >
< td class = "paramname" > < em > y< / em >   < / td >
< / tr >
< tr >
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< td > < / td >
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< td > )< / td >
< td > < / td > < td > < / td >
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< / tr >
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< p > Returns the cross product of x and y. < / p >
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< dl class = "tparams" > < dt > Template Parameters< / dt > < dd >
< table class = "tparams" >
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< tr > < td class = "paramname" > valType< / td > < td > Floating-point scalar types.< / td > < / tr >
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< / table >
< / dd >
< / dl >
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< dl class = "section see" > < dt > See also< / dt > < dd > < a href = "http://www.opengl.org/sdk/docs/manglsl/xhtml/cross.xml" > GLSL cross man page< / a > < / dd >
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< dd >
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< a href = "http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf" > GLSL 4.20.8 specification, section 8.5 Geometric Functions< / a > < / dd > < / dl >
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< / div >
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< a class = "anchor" id = "ga7ca317dde0d7e94d920153554d4a02a8" > < / a >
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< td class = "memname" > GLM_FUNC_DECL T glm::distance < / td >
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< td > (< / td >
< td class = "paramtype" > vecType< T, P > const &   < / td >
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< td class = "paramname" > < em > p0< / em > , < / td >
< / tr >
< tr >
< td class = "paramkey" > < / td >
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< td > < / td >
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< td class = "paramtype" > vecType< T, P > const &   < / td >
< td class = "paramname" > < em > p1< / em >   < / td >
< / tr >
< tr >
< td > < / td >
< td > )< / td >
< td > < / td > < td > < / td >
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< / tr >
< / table >
< / div > < div class = "memdoc" >
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< p > Returns the distance betwwen p0 and p1, i.e., length(p0 - p1). < / p >
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< dl class = "tparams" > < dt > Template Parameters< / dt > < dd >
< table class = "tparams" >
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< tr > < td class = "paramname" > genType< / td > < td > Floating-point vector types.< / td > < / tr >
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< / table >
< / dd >
< / dl >
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< dl class = "section see" > < dt > See also< / dt > < dd > < a href = "http://www.opengl.org/sdk/docs/manglsl/xhtml/distance.xml" > GLSL distance man page< / a > < / dd >
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< dd >
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< a href = "http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf" > GLSL 4.20.8 specification, section 8.5 Geometric Functions< / a > < / dd > < / dl >
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< / div >
< / div >
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< a class = "anchor" id = "ga7dada304da2ba7dd3376ab4f178c3f6b" > < / a >
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< td class = "memname" > GLM_FUNC_DECL T glm::dot < / td >
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< td > (< / td >
< td class = "paramtype" > vecType< T, P > const &   < / td >
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< td class = "paramname" > < em > x< / em > , < / td >
< / tr >
< tr >
< td class = "paramkey" > < / td >
< td > < / td >
< td class = "paramtype" > vecType< T, P > const &   < / td >
< td class = "paramname" > < em > y< / em >   < / td >
< / tr >
< tr >
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< td > < / td >
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< td > )< / td >
< td > < / td > < td > < / td >
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< / tr >
< / table >
< / div > < div class = "memdoc" >
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< p > Returns the dot product of x and y, i.e., result = x * y. < / p >
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< dl class = "tparams" > < dt > Template Parameters< / dt > < dd >
< table class = "tparams" >
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< tr > < td class = "paramname" > genType< / td > < td > Floating-point vector types.< / td > < / tr >
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< / table >
< / dd >
< / dl >
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< dl class = "section see" > < dt > See also< / dt > < dd > < a href = "http://www.opengl.org/sdk/docs/manglsl/xhtml/dot.xml" > GLSL dot man page< / a > < / dd >
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< dd >
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< a href = "http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf" > GLSL 4.20.8 specification, section 8.5 Geometric Functions< / a > < / dd > < / dl >
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< / div >
< / div >
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< a class = "anchor" id = "gaea854e5aec1b5839832ac2dfc7cd3c0d" > < / a >
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< td class = "memname" > GLM_FUNC_DECL vecType< T, P> glm::faceforward < / td >
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< td > (< / td >
< td class = "paramtype" > vecType< T, P > const &   < / td >
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< td class = "paramname" > < em > N< / em > , < / td >
< / tr >
< tr >
< td class = "paramkey" > < / td >
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< td > < / td >
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< td class = "paramtype" > vecType< T, P > const &   < / td >
< td class = "paramname" > < em > I< / em > , < / td >
< / tr >
< tr >
< td class = "paramkey" > < / td >
< td > < / td >
< td class = "paramtype" > vecType< T, P > const &   < / td >
< td class = "paramname" > < em > Nref< / em >   < / td >
< / tr >
< tr >
< td > < / td >
< td > )< / td >
< td > < / td > < td > < / td >
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< / tr >
< / table >
< / div > < div class = "memdoc" >
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< p > If dot(Nref, I) < 0.0, return N, otherwise, return -N. < / p >
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< dl class = "tparams" > < dt > Template Parameters< / dt > < dd >
< table class = "tparams" >
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< tr > < td class = "paramname" > genType< / td > < td > Floating-point vector types.< / td > < / tr >
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< / table >
< / dd >
< / dl >
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< dl class = "section see" > < dt > See also< / dt > < dd > < a href = "http://www.opengl.org/sdk/docs/manglsl/xhtml/faceforward.xml" > GLSL faceforward man page< / a > < / dd >
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< dd >
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< a href = "http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf" > GLSL 4.20.8 specification, section 8.5 Geometric Functions< / a > < / dd > < / dl >
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< / div >
< / div >
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< a class = "anchor" id = "ga18d45e3d4c7705e67ccfabd99e521604" > < / a >
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< td class = "memname" > GLM_FUNC_DECL T glm::length < / td >
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< td > (< / td >
< td class = "paramtype" > vecType< T, P > const &   < / td >
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< td class = "paramname" > < em > x< / em > < / td > < td > )< / td >
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< p > Returns the length of x, i.e., sqrt(x * x). < / p >
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< dl class = "tparams" > < dt > Template Parameters< / dt > < dd >
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< tr > < td class = "paramname" > genType< / td > < td > Floating-point vector types.< / td > < / tr >
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< dl class = "section see" > < dt > See also< / dt > < dd > < a href = "http://www.opengl.org/sdk/docs/manglsl/xhtml/length.xml" > GLSL length man page< / a > < / dd >
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< dd >
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< a href = "http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf" > GLSL 4.20.8 specification, section 8.5 Geometric Functions< / a > < / dd > < / dl >
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< td class = "memname" > GLM_FUNC_DECL vecType< T, P> glm::normalize < / td >
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< td > (< / td >
< td class = "paramtype" > vecType< T, P > const &   < / td >
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< td class = "paramname" > < em > x< / em > < / td > < td > )< / td >
< td > < / td >
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< p > Returns a vector in the same direction as x but with length of 1. < / p >
< p > According to issue 10 GLSL 1.10 specification, if length(x) == 0 then result is undefined and generate an error.< / p >
< dl class = "section see" > < dt > See also< / dt > < dd > < a href = "http://www.opengl.org/sdk/docs/manglsl/xhtml/normalize.xml" > GLSL normalize man page< / a > < / dd >
< dd >
< a href = "http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf" > GLSL 4.20.8 specification, section 8.5 Geometric Functions< / a > < / dd > < / dl >
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< a class = "anchor" id = "gab63646fc36b81cf69d3ce123a72f76f2" > < / a >
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< td class = "memname" > GLM_FUNC_DECL genType glm::reflect < / td >
< td > (< / td >
< td class = "paramtype" > genType const &   < / td >
< td class = "paramname" > < em > I< / em > , < / td >
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< / tr >
< tr >
< td class = "paramkey" > < / td >
< td > < / td >
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< td class = "paramtype" > genType const &   < / td >
< td class = "paramname" > < em > N< / em >   < / td >
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< / tr >
< tr >
< td > < / td >
< td > )< / td >
< td > < / td > < td > < / td >
< / tr >
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< / div > < div class = "memdoc" >
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< p > For the incident vector I and surface orientation N, returns the reflection direction : result = I - 2.0 * dot(N, I) * N. < / p >
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< dl class = "tparams" > < dt > Template Parameters< / dt > < dd >
< table class = "tparams" >
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< tr > < td class = "paramname" > genType< / td > < td > Floating-point vector types.< / td > < / tr >
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< / table >
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< dl class = "section see" > < dt > See also< / dt > < dd > < a href = "http://www.opengl.org/sdk/docs/manglsl/xhtml/reflect.xml" > GLSL reflect man page< / a > < / dd >
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< dd >
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< a href = "http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf" > GLSL 4.20.8 specification, section 8.5 Geometric Functions< / a > < / dd > < / dl >
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< / div >
< / div >
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< a class = "anchor" id = "gab7e7cdf4403931a5f7b74560ad64159b" > < / a >
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< td class = "memname" > GLM_FUNC_DECL vecType< T, P> glm::refract < / td >
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< td > (< / td >
< td class = "paramtype" > vecType< T, P > const &   < / td >
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< td class = "paramname" > < em > I< / em > , < / td >
< / tr >
< tr >
< td class = "paramkey" > < / td >
< td > < / td >
< td class = "paramtype" > vecType< T, P > const &   < / td >
< td class = "paramname" > < em > N< / em > , < / td >
< / tr >
< tr >
< td class = "paramkey" > < / td >
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< td > < / td >
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< td class = "paramtype" > T  < / td >
< td class = "paramname" > < em > eta< / em >   < / td >
< / tr >
< tr >
< td > < / td >
< td > )< / td >
< td > < / td > < td > < / td >
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< / tr >
< / table >
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< p > For the incident vector I and surface normal N, and the ratio of indices of refraction eta, return the refraction vector. < / p >
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< dl class = "tparams" > < dt > Template Parameters< / dt > < dd >
< table class = "tparams" >
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< tr > < td class = "paramname" > genType< / td > < td > Floating-point vector types.< / td > < / tr >
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< / table >
< / dd >
< / dl >
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< dl class = "section see" > < dt > See also< / dt > < dd > < a href = "http://www.opengl.org/sdk/docs/manglsl/xhtml/refract.xml" > GLSL refract man page< / a > < / dd >
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< dd >
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< a href = "http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf" > GLSL 4.20.8 specification, section 8.5 Geometric Functions< / a > < / dd > < / dl >
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