transform2.inl

 
 
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