From 501eee8b10b9e9853a235f24fde2a663ce00922a Mon Sep 17 00:00:00 2001
From: Brad Davis <bdavis@saintandreas.org>
Date: Wed, 6 Sep 2017 23:38:02 -0700
Subject: [PATCH] Fix transform of polylines with high update rates

---
 .../entities-renderer/src/RenderablePolyLineEntityItem.cpp  | 6 +++++-
 .../entities-renderer/src/RenderablePolyLineEntityItem.h    | 1 +
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/libraries/entities-renderer/src/RenderablePolyLineEntityItem.cpp b/libraries/entities-renderer/src/RenderablePolyLineEntityItem.cpp
index 1cecb0b036..50226ef8ae 100644
--- a/libraries/entities-renderer/src/RenderablePolyLineEntityItem.cpp
+++ b/libraries/entities-renderer/src/RenderablePolyLineEntityItem.cpp
@@ -141,6 +141,10 @@ void PolyLineEntityRenderer::doRenderUpdateAsynchronousTyped(const TypedEntityPo
     auto normalsChanged = entity->normalsChanged();
     entity->resetPolyLineChanged();
 
+    _polylineTransform = Transform();
+    _polylineTransform.setTranslation(entity->getPosition());
+    _polylineTransform.setRotation(entity->getRotation());
+
     if (pointsChanged) {
         _lastPoints = entity->getLinePoints();
     }
@@ -218,7 +222,7 @@ void PolyLineEntityRenderer::doRender(RenderArgs* args) {
     Q_ASSERT(args->_batch);
 
     gpu::Batch& batch = *args->_batch;
-    batch.setModelTransform(Transform{ _modelTransform }.setScale(vec3(1)));
+    batch.setModelTransform(_polylineTransform);
     batch.setUniformBuffer(PAINTSTROKE_UNIFORM_SLOT, _uniformBuffer);
 
     if (_texture && _texture->isLoaded()) {
diff --git a/libraries/entities-renderer/src/RenderablePolyLineEntityItem.h b/libraries/entities-renderer/src/RenderablePolyLineEntityItem.h
index 88b5ebdb9f..b0bdcf545b 100644
--- a/libraries/entities-renderer/src/RenderablePolyLineEntityItem.h
+++ b/libraries/entities-renderer/src/RenderablePolyLineEntityItem.h
@@ -47,6 +47,7 @@ protected:
     void updateGeometry(const std::vector<Vertex>& vertices);
     static std::vector<Vertex> updateVertices(const QVector<glm::vec3>& points, const QVector<glm::vec3>& normals, const QVector<float>& strokeWidths);
 
+    Transform _polylineTransform;
     QVector<glm::vec3> _lastPoints;
     QVector<glm::vec3> _lastNormals;
     QVector<float> _lastStrokeWidths;