diff options
Diffstat (limited to 'src/include/glm/ext/matrix_projection.inl')
| -rw-r--r-- | src/include/glm/ext/matrix_projection.inl | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/src/include/glm/ext/matrix_projection.inl b/src/include/glm/ext/matrix_projection.inl new file mode 100644 index 0000000..af8c8f2 --- /dev/null +++ b/src/include/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
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