From 8d2495ef7a6448546b0d36d0d89952d1321980fc Mon Sep 17 00:00:00 2001
From: SamGondelman <samuel_gondelman@alumni.brown.edu>
Date: Fri, 29 Mar 2019 16:24:04 -0700
Subject: [PATCH] vive coordinates in clip space

---
 plugins/openvr/src/OpenVrDisplayPlugin.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/plugins/openvr/src/OpenVrDisplayPlugin.cpp b/plugins/openvr/src/OpenVrDisplayPlugin.cpp
index 122c39d557..30534b8ffd 100644
--- a/plugins/openvr/src/OpenVrDisplayPlugin.cpp
+++ b/plugins/openvr/src/OpenVrDisplayPlugin.cpp
@@ -802,7 +802,8 @@ DisplayPlugin::StencilMaskMeshOperator OpenVrDisplayPlugin::getStencilMaskMeshOp
                     indices.reserve(numIndices);
                     for (int i = 0; i < numIndices; i++) {
                         vr::HmdVector2_t vertex2D = stencilMesh.pVertexData[i];
-                        vertices.emplace_back(vertex2D.v[0], vertex2D.v[1], 0.0f);
+                        // We need the vertices in clip space
+                        vertices.emplace_back(vertex2D.v[0] - (1.0f - (float)eye), 2.0f * vertex2D.v[1] - 1.0f, 0.0f);
                         indices.push_back(i);
                     }