diff options
Diffstat (limited to 'template/opengl.mako')
| -rw-r--r-- | template/opengl.mako | 31 |
1 files changed, 27 insertions, 4 deletions
diff --git a/template/opengl.mako b/template/opengl.mako index 6b09f69..50cdbbc 100644 --- a/template/opengl.mako +++ b/template/opengl.mako @@ -55,6 +55,15 @@ __kernel void collect_gl_moments(__global __read_only ${float_type}* f, moments[gid] = data; } +<% +def neighbor_offset(c_i): + return { + 2: lambda: c_i[1]*memory.size_x + c_i[0], + 3: lambda: c_i[2]*memory.size_x*memory.size_y + c_i[1]*memory.size_x + c_i[0] + }.get(descriptor.d)() + +%> + __kernel void collect_gl_moments_to_texture(__global __read_only ${float_type}* f, __global __read_only int* material, % if descriptor.d == 2: @@ -90,10 +99,24 @@ __kernel void collect_gl_moments_to_texture(__global __read_only ${float_type}* data.w = ${ccode(moments_assignment[3].rhs)}; % endif } else { - data.x = 0.0; - data.y = 0.0; - data.z = 0.0; - data.w = 1.0; + const int material_west = material[gid + ${neighbor_offset((-1,0,0))}]; + const int material_east = material[gid + ${neighbor_offset((1,0,0))}]; + const int material_north = material[gid + ${neighbor_offset((0,1,0))}]; + const int material_south = material[gid + ${neighbor_offset((0,-1,0))}]; + const int material_up = material[gid + ${neighbor_offset((0,0, 1))}]; + const int material_down = material[gid + ${neighbor_offset((0,0,-1))}]; + + // recover surface normal approximation using surrounding materials + float3 n; + if (material_west != 5) { n.x = 1; } + if (material_east != 5) { n.x = -1; } + if (material_north != 5) { n.y = -1; } + if (material_south != 5) { n.y = 1; } + 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.w = 1.0; // signal impermeable material to raytracer } write_imagef(moments, ${moments_cell()}, data); |