diff options
| author | Brecht Van Lommel <brechtvanlommel@pandora.be> | 2012-05-02 21:03:46 +0400 |
|---|---|---|
| committer | Brecht Van Lommel <brechtvanlommel@pandora.be> | 2012-05-02 21:03:46 +0400 |
| commit | d64661b5078cd4781bd58fce6fadedac511c4132 (patch) | |
| tree | 08abb98017e41cd6f7bfbd1f2ca87a2166f91eea /intern/cycles/kernel/kernel_shader.h | |
| parent | 89f554fd24abb6c3986090933f771da267345b96 (diff) | |
Cycles: add Ray Length output to Light Path node. This gives the distance travelled
by the last light ray. One use case for this might be to do absorption.
Patch #31232 by Agustin benavidez, see this blog post for details:
http://agus3d.blogspot.com.ar/2012/05/blender-cycles-ray-length-node-output.html
Diffstat (limited to 'intern/cycles/kernel/kernel_shader.h')
| -rw-r--r-- | intern/cycles/kernel/kernel_shader.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/intern/cycles/kernel/kernel_shader.h b/intern/cycles/kernel/kernel_shader.h index e4edc480272..af821bad868 100644 --- a/intern/cycles/kernel/kernel_shader.h +++ b/intern/cycles/kernel/kernel_shader.h @@ -77,6 +77,7 @@ __device_inline void shader_setup_from_ray(KernelGlobals *kg, ShaderData *sd, sd->N = Ng; sd->I = -ray->D; sd->shader = shader; + sd->ray_length = isect->t; /* smooth normal */ if(sd->shader & SHADER_SMOOTH_NORMAL) @@ -127,7 +128,7 @@ __device_inline void shader_setup_from_ray(KernelGlobals *kg, ShaderData *sd, __device void shader_setup_from_sample(KernelGlobals *kg, ShaderData *sd, const float3 P, const float3 Ng, const float3 I, - int shader, int object, int prim, float u, float v, float time) + int shader, int object, int prim, float u, float v, float t, float time) { /* vectors */ sd->P = P; @@ -145,6 +146,7 @@ __device void shader_setup_from_sample(KernelGlobals *kg, ShaderData *sd, sd->u = u; sd->v = v; #endif + sd->ray_length = t; /* detect instancing, for non-instanced the object index is -object-1 */ #ifdef __INSTANCING__ @@ -242,7 +244,7 @@ __device void shader_setup_from_displace(KernelGlobals *kg, ShaderData *sd, /* watch out: no instance transform currently */ - shader_setup_from_sample(kg, sd, P, Ng, I, shader, object, prim, u, v, TIME_INVALID); + shader_setup_from_sample(kg, sd, P, Ng, I, shader, object, prim, u, v, 0.0f, TIME_INVALID); } /* ShaderData setup from ray into background */ @@ -259,6 +261,7 @@ __device_inline void shader_setup_from_background(KernelGlobals *kg, ShaderData #ifdef __MOTION__ sd->time = ray->time; #endif + sd->ray_length = 0.0f; #ifdef __INSTANCING__ sd->object = ~0; |