From f16eed48dac6076adc07f273910dd22cfd8b4af3 Mon Sep 17 00:00:00 2001
From: calderpg-tri <32444241+calderpg-tri@users.noreply.github.com>
Date: Tue, 2 Apr 2019 17:05:15 -0400
Subject: [PATCH] Fix OpenCL compile failure on Intel (beignet)

Intel OpenCL driver (beignet) fails to compile the registration kernel because the call to sqrt is ambiguous. Adding a float specifier is enough to compile.
---
 kinect2_registration/src/depth_registration.cl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kinect2_registration/src/depth_registration.cl b/kinect2_registration/src/depth_registration.cl
index 4011b9ae..ba0c7972 100644
--- a/kinect2_registration/src/depth_registration.cl
+++ b/kinect2_registration/src/depth_registration.cl
@@ -187,7 +187,7 @@ void kernel remapDepth(global const ushort *in, global ushort *out, global const
   }
 
   const float4 distXY = (float4)((x - xL) * (x - xL), (xH - x) * (xH - x), (y - yL) * (y - yL), (yH - y) * (yH - y));
-  const float4 tmp = (float4)(sqrt(2.0));
+  const float4 tmp = (float4)(sqrt(2.0f));
   const float4 dist2 = (float4)(distXY.s0 + distXY.s2, distXY.s1 + distXY.s2, distXY.s0 + distXY.s3, distXY.s1 + distXY.s3);
   const float4 dist = select((float4)(0), tmp - sqrt(dist2), valid);
   const float sum = dist.s0 + dist.s1 + dist.s2 + dist.s3;