diff options
Diffstat (limited to '3rdparty/glm/source/glm/ext/matrix_projection.inl')
| -rw-r--r-- | 3rdparty/glm/source/glm/ext/matrix_projection.inl | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/3rdparty/glm/source/glm/ext/matrix_projection.inl b/3rdparty/glm/source/glm/ext/matrix_projection.inl new file mode 100644 index 0000000..2f2c196 --- /dev/null +++ b/3rdparty/glm/source/glm/ext/matrix_projection.inl @@ -0,0 +1,106 @@ +namespace glm +{ + template<typename T, typename U, qualifier Q> + GLM_FUNC_QUALIFIER vec<3, T, Q> projectZO(vec<3, T, Q> const& obj, mat<4, 4, T, Q> const& model, mat<4, 4, T, Q> const& proj, vec<4, U, Q> const& viewport) + { + vec<4, T, Q> tmp = vec<4, T, Q>(obj, static_cast<T>(1)); + tmp = model * tmp; + tmp = proj * tmp; + + tmp /= tmp.w; + tmp.x = tmp.x * static_cast<T>(0.5) + static_cast<T>(0.5); + tmp.y = tmp.y * static_cast<T>(0.5) + static_cast<T>(0.5); + + tmp[0] = tmp[0] * T(viewport[2]) + T(viewport[0]); + tmp[1] = tmp[1] * T(viewport[3]) + T(viewport[1]); + + return vec<3, T, Q>(tmp); + } + + template<typename T, typename U, qualifier Q> + GLM_FUNC_QUALIFIER vec<3, T, Q> projectNO(vec<3, T, Q> const& obj, mat<4, 4, T, Q> const& model, mat<4, 4, T, Q> const& proj, vec<4, U, Q> const& viewport) + { + vec<4, T, Q> tmp = vec<4, T, Q>(obj, static_cast<T>(1)); + tmp = model * tmp; + tmp = proj * tmp; + + tmp /= tmp.w; + tmp = tmp * static_cast<T>(0.5) + static_cast<T>(0.5); + tmp[0] = tmp[0] * T(viewport[2]) + T(viewport[0]); + tmp[1] = tmp[1] * T(viewport[3]) + T(viewport[1]); + + return vec<3, T, Q>(tmp); + } + + template<typename T, typename U, qualifier Q> + GLM_FUNC_QUALIFIER vec<3, T, Q> project(vec<3, T, Q> const& obj, mat<4, 4, T, Q> const& model, mat<4, 4, T, Q> const& proj, vec<4, U, Q> const& viewport) + { +# if GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_ZO_BIT + return projectZO(obj, model, proj, viewport); +# else + return projectNO(obj, model, proj, viewport); +# endif + } + + template<typename T, typename U, qualifier Q> + GLM_FUNC_QUALIFIER vec<3, T, Q> unProjectZO(vec<3, T, Q> const& win, mat<4, 4, T, Q> const& model, mat<4, 4, T, Q> const& proj, vec<4, U, Q> const& viewport) + { + mat<4, 4, T, Q> Inverse = inverse(proj * model); + + vec<4, T, Q> tmp = vec<4, T, Q>(win, T(1)); + tmp.x = (tmp.x - T(viewport[0])) / T(viewport[2]); + tmp.y = (tmp.y - T(viewport[1])) / T(viewport[3]); + tmp.x = tmp.x * static_cast<T>(2) - static_cast<T>(1); + tmp.y = tmp.y * static_cast<T>(2) - static_cast<T>(1); + + vec<4, T, Q> obj = Inverse * tmp; + obj /= obj.w; + + return vec<3, T, Q>(obj); + } + + template<typename T, typename U, qualifier Q> + GLM_FUNC_QUALIFIER vec<3, T, Q> unProjectNO(vec<3, T, Q> const& win, mat<4, 4, T, Q> const& model, mat<4, 4, T, Q> const& proj, vec<4, U, Q> const& viewport) + { + mat<4, 4, T, Q> Inverse = inverse(proj * model); + + vec<4, T, Q> tmp = vec<4, T, Q>(win, T(1)); + tmp.x = (tmp.x - T(viewport[0])) / T(viewport[2]); + tmp.y = (tmp.y - T(viewport[1])) / T(viewport[3]); + tmp = tmp * static_cast<T>(2) - static_cast<T>(1); + + vec<4, T, Q> obj = Inverse * tmp; + obj /= obj.w; + + return vec<3, T, Q>(obj); + } + + template<typename T, typename U, qualifier Q> + GLM_FUNC_QUALIFIER vec<3, T, Q> unProject(vec<3, T, Q> const& win, mat<4, 4, T, Q> const& model, mat<4, 4, T, Q> const& proj, vec<4, U, Q> const& viewport) + { +# if GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_ZO_BIT + return unProjectZO(win, model, proj, viewport); +# else + return unProjectNO(win, model, proj, viewport); +# endif + } + + template<typename T, qualifier Q, typename U> + GLM_FUNC_QUALIFIER mat<4, 4, T, Q> pickMatrix(vec<2, T, Q> const& center, vec<2, T, Q> const& delta, vec<4, U, Q> const& viewport) + { + assert(delta.x > static_cast<T>(0) && delta.y > static_cast<T>(0)); + mat<4, 4, T, Q> Result(static_cast<T>(1)); + + if(!(delta.x > static_cast<T>(0) && delta.y > static_cast<T>(0))) + return Result; // Error + + vec<3, T, Q> Temp( + (static_cast<T>(viewport[2]) - static_cast<T>(2) * (center.x - static_cast<T>(viewport[0]))) / delta.x, + (static_cast<T>(viewport[3]) - static_cast<T>(2) * (center.y - static_cast<T>(viewport[1]))) / delta.y, + static_cast<T>(0)); + + // Translate and scale the picked region to the entire window + Result = translate(Result, Temp); + return scale(Result, vec<3, T, Q>(static_cast<T>(viewport[2]) / delta.x, static_cast<T>(viewport[3]) / delta.y, static_cast<T>(1))); + } +}//namespace glm |