Update orthographic projection correctly.

viewer/glow-extras/viewer/CameraController.cc

@@ -70,11 +70,25 @@ tg::mat4 CameraController::computeViewMatrix() const
 tg::mat4 CameraController::computeProjMatrix() const
 {
     if (mOrthographicModeEnabled)
-        return tg::orthographic_reverse_z(mOrthographicBounds.min.x, mOrthographicBounds.max.x, //
-                                          mOrthographicBounds.min.y, mOrthographicBounds.max.y, //
-                                          mOrthographicBounds.min.z, mOrthographicBounds.max.z);
+    {
+        auto const aspect = float(mWindowWidth) / mWindowHeight;
+        auto bounds = mOrthographicBounds;
+        if (aspect < 1.0f)
+        {
+            bounds.min.y /= aspect;
+            bounds.max.y /= aspect;
+        }
+        else
+        {
+            bounds.min.x *= aspect;
+            bounds.max.x *= aspect;
+        }
+
+        return tg::orthographic_reverse_z(bounds.min.x, bounds.max.x, bounds.min.y, bounds.max.y, bounds.min.z, bounds.max.z);
+    }
+
     else
-    return tg::perspective_reverse_z(s.HorizontalFov, mWindowWidth / float(mWindowHeight), s.NearPlane);
+        return tg::perspective_reverse_z(s.HorizontalFov, mWindowWidth / float(mWindowHeight), s.NearPlane);
 }
 
 CameraController::CameraController() { resetView(); }