Refactor of asset factory to address mutation/face controller logic

Fixes issue where face controller extrusions applied to a rotated or
scaled mesh would be applied incorrectly. Now we create the mesh at the
origin, deform it as required (scale), apply face controllers and
finally relocate it as required (position and rotation). A relative
level of detail is cascade into the generation for shapes like cylinder,
which generate fewer faces for small objects.

1 files changed, 19 insertions, 0 deletions

diff --git a/assetFactory/mutation.cpp b/assetFactory/mutation.cpp
index 21d2a24..9722dc3 100644
--- a/assetFactory/mutation.cpp
+++ b/assetFactory/mutation.cpp
@@ -1,4 +1,5 @@
 #include "mutation.h"
+#include <algorithm>
 #include <glm/gtx/transform.hpp>
 #include <maths.h>
 
@@ -8,3 +9,21 @@ Mutation::getMatrix() const
 	return glm::translate(glm::identity<Matrix>(), position) * rotate_ypr(rotation)
 			* glm::scale(glm::identity<Matrix>(), scale);
 }
+
+Mutation::Matrix
+Mutation::getDeformationMatrix() const
+{
+	return glm::scale(glm::identity<Matrix>(), scale);
+}
+
+Mutation::Matrix
+Mutation::getLocationMatrix() const
+{
+	return glm::translate(glm::identity<Matrix>(), position) * rotate_ypr(rotation);
+}
+
+float
+Mutation::relativeLevelOfDetail() const
+{
+	return std::max({scale.x, scale.y, scale.z});
+}