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/// @ref gtx_transform2
namespace glm
{
template<typename T, qualifier Q>
GLM_FUNC_QUALIFIER mat<3, 3, T, Q> shearX2D(mat<3, 3, T, Q> const& m, T s)
{
mat<3, 3, T, Q> r(1);
r[1][0] = s;
return m * r;
}
template<typename T, qualifier Q>
GLM_FUNC_QUALIFIER mat<3, 3, T, Q> shearY2D(mat<3, 3, T, Q> const& m, T s)
{
mat<3, 3, T, Q> r(1);
r[0][1] = s;
return m * r;
}
template<typename T, qualifier Q>
GLM_FUNC_QUALIFIER mat<4, 4, T, Q> shearX3D(mat<4, 4, T, Q> const& m, T s, T t)
{
mat<4, 4, T, Q> r(1);
r[0][1] = s;
r[0][2] = t;
return m * r;
}
template<typename T, qualifier Q>
GLM_FUNC_QUALIFIER mat<4, 4, T, Q> shearY3D(mat<4, 4, T, Q> const& m, T s, T t)
{
mat<4, 4, T, Q> r(1);
r[1][0] = s;
r[1][2] = t;
return m * r;
}
template<typename T, qualifier Q>
GLM_FUNC_QUALIFIER mat<4, 4, T, Q> shearZ3D(mat<4, 4, T, Q> const& m, T s, T t)
{
mat<4, 4, T, Q> r(1);
r[2][0] = s;
r[2][1] = t;
return m * r;
}
template<typename T, qualifier Q>
GLM_FUNC_QUALIFIER mat<3, 3, T, Q> reflect2D(mat<3, 3, T, Q> const& m, vec<3, T, Q> const& normal)
{
mat<3, 3, T, Q> r(static_cast<T>(1));
r[0][0] = static_cast<T>(1) - static_cast<T>(2) * normal.x * normal.x;
r[0][1] = -static_cast<T>(2) * normal.x * normal.y;
r[1][0] = -static_cast<T>(2) * normal.x * normal.y;
r[1][1] = static_cast<T>(1) - static_cast<T>(2) * normal.y * normal.y;
return m * r;
}
template<typename T, qualifier Q>
GLM_FUNC_QUALIFIER mat<4, 4, T, Q> reflect3D(mat<4, 4, T, Q> const& m, vec<3, T, Q> const& normal)
{
mat<4, 4, T, Q> r(static_cast<T>(1));
r[0][0] = static_cast<T>(1) - static_cast<T>(2) * normal.x * normal.x;
r[0][1] = -static_cast<T>(2) * normal.x * normal.y;
r[0][2] = -static_cast<T>(2) * normal.x * normal.z;
r[1][0] = -static_cast<T>(2) * normal.x * normal.y;
r[1][1] = static_cast<T>(1) - static_cast<T>(2) * normal.y * normal.y;
r[1][2] = -static_cast<T>(2) * normal.y * normal.z;
r[2][0] = -static_cast<T>(2) * normal.x * normal.z;
r[2][1] = -static_cast<T>(2) * normal.y * normal.z;
r[2][2] = static_cast<T>(1) - static_cast<T>(2) * normal.z * normal.z;
return m * r;
}
template<typename T, qualifier Q>
GLM_FUNC_QUALIFIER mat<3, 3, T, Q> proj2D(
const mat<3, 3, T, Q>& m,
const vec<3, T, Q>& normal)
{
mat<3, 3, T, Q> r(static_cast<T>(1));
r[0][0] = static_cast<T>(1) - normal.x * normal.x;
r[0][1] = - normal.x * normal.y;
r[1][0] = - normal.x * normal.y;
r[1][1] = static_cast<T>(1) - normal.y * normal.y;
return m * r;
}
template<typename T, qualifier Q>
GLM_FUNC_QUALIFIER mat<4, 4, T, Q> proj3D(
const mat<4, 4, T, Q>& m,
const vec<3, T, Q>& normal)
{
mat<4, 4, T, Q> r(static_cast<T>(1));
r[0][0] = static_cast<T>(1) - normal.x * normal.x;
r[0][1] = - normal.x * normal.y;
r[0][2] = - normal.x * normal.z;
r[1][0] = - normal.x * normal.y;
r[1][1] = static_cast<T>(1) - normal.y * normal.y;
r[1][2] = - normal.y * normal.z;
r[2][0] = - normal.x * normal.z;
r[2][1] = - normal.y * normal.z;
r[2][2] = static_cast<T>(1) - normal.z * normal.z;
return m * r;
}
template<typename T, qualifier Q>
GLM_FUNC_QUALIFIER mat<4, 4, T, Q> scaleBias(T scale, T bias)
{
mat<4, 4, T, Q> result;
result[3] = vec<4, T, Q>(vec<3, T, Q>(bias), static_cast<T>(1));
result[0][0] = scale;
result[1][1] = scale;
result[2][2] = scale;
return result;
}
template<typename T, qualifier Q>
GLM_FUNC_QUALIFIER mat<4, 4, T, Q> scaleBias(mat<4, 4, T, Q> const& m, T scale, T bias)
{
return m * scaleBias(scale, bias);
}
}//namespace glm
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