diff options
Diffstat (limited to 'intern/cycles/kernel/geom/motion_triangle.h')
-rw-r--r-- | intern/cycles/kernel/geom/motion_triangle.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/intern/cycles/kernel/geom/motion_triangle.h b/intern/cycles/kernel/geom/motion_triangle.h index 62b7b630c89..bd62325eaf2 100644 --- a/intern/cycles/kernel/geom/motion_triangle.h +++ b/intern/cycles/kernel/geom/motion_triangle.h @@ -116,6 +116,52 @@ ccl_device_inline void motion_triangle_vertices( verts[2] = (1.0f - t) * verts[2] + t * next_verts[2]; } +ccl_device_inline void motion_triangle_vertices_and_normals( + KernelGlobals kg, int object, int prim, float time, float3 verts[3], float3 normals[3]) +{ + /* get motion info */ + int numsteps, numverts; + object_motion_info(kg, object, &numsteps, &numverts, NULL); + + /* Figure out which steps we need to fetch and their interpolation factor. */ + int maxstep = numsteps * 2; + int step = min((int)(time * maxstep), maxstep - 1); + float t = time * maxstep - step; + + /* Find attribute. */ + int offset = intersection_find_attribute(kg, object, ATTR_STD_MOTION_VERTEX_POSITION); + kernel_assert(offset != ATTR_STD_NOT_FOUND); + + /* Fetch vertex coordinates. */ + float3 next_verts[3]; + uint4 tri_vindex = kernel_tex_fetch(__tri_vindex, prim); + + motion_triangle_verts_for_step(kg, tri_vindex, offset, numverts, numsteps, step, verts); + motion_triangle_verts_for_step(kg, tri_vindex, offset, numverts, numsteps, step + 1, next_verts); + + /* Interpolate between steps. */ + verts[0] = (1.0f - t) * verts[0] + t * next_verts[0]; + verts[1] = (1.0f - t) * verts[1] + t * next_verts[1]; + verts[2] = (1.0f - t) * verts[2] + t * next_verts[2]; + + /* Compute smooth normal. */ + + /* Find attribute. */ + offset = intersection_find_attribute(kg, object, ATTR_STD_MOTION_VERTEX_NORMAL); + kernel_assert(offset != ATTR_STD_NOT_FOUND); + + /* Fetch vertex coordinates. */ + float3 next_normals[3]; + motion_triangle_normals_for_step(kg, tri_vindex, offset, numverts, numsteps, step, normals); + motion_triangle_normals_for_step( + kg, tri_vindex, offset, numverts, numsteps, step + 1, next_normals); + + /* Interpolate between steps. */ + normals[0] = (1.0f - t) * normals[0] + t * next_normals[0]; + normals[1] = (1.0f - t) * normals[1] + t * next_normals[1]; + normals[2] = (1.0f - t) * normals[2] + t * next_normals[2]; +} + ccl_device_inline float3 motion_triangle_smooth_normal( KernelGlobals kg, float3 Ng, int object, int prim, float u, float v, float time) { |