Use floats for texture storage, test curl visualization

Using `GL_RGBA32F` as the texture storage format instead of packing
values into the unit interval.

1 files changed, 1 insertions, 1 deletions

diff --git a/template/opengl.mako b/template/opengl.mako
index 50cdbbc..52699d5 100644
--- a/template/opengl.mako
+++ b/template/opengl.mako
@@ -115,7 +115,7 @@ __kernel void collect_gl_moments_to_texture(__global __read_only  ${float_type}*
       if (material_up    != 5) { n.z = -1; }
       if (material_down  != 5) { n.z =  1; }
 
-      data.xyz = 0.5 + 0.5*n; // pack surface normal into texture
+      data.xyz = normalize(n);
       data.w   = 1.0; // signal impermeable material to raytracer
     }