diff options
Diffstat (limited to 'intern/cycles/kernel/kernel_light.h')
| -rw-r--r-- | intern/cycles/kernel/kernel_light.h | 26 |
1 files changed, 14 insertions, 12 deletions
diff --git a/intern/cycles/kernel/kernel_light.h b/intern/cycles/kernel/kernel_light.h index 09ee1f68e12..1561ddc9ddd 100644 --- a/intern/cycles/kernel/kernel_light.h +++ b/intern/cycles/kernel/kernel_light.h @@ -329,18 +329,20 @@ __device float triangle_light_pdf(KernelGlobals *kg, #ifdef __HAIR__ /* Strand Light */ -__device void curve_seg_light_sample(KernelGlobals *kg, int prim, int object, - float randu, float randv, float time, LightSample *ls) +__device void curve_segment_light_sample(KernelGlobals *kg, int prim, int object, + int segment, float randu, float randv, float time, LightSample *ls) { /* this strand code needs completion */ - float4 v00 = kernel_tex_fetch(__curve_segments, prim); + float4 v00 = kernel_tex_fetch(__curves, prim); + + int k0 = __float_as_int(v00.x) + segment; + int k1 = k0 + 1; - int v1 = __float_as_int(v00.x); - int v2 = __float_as_int(v00.y); - float l = v00.w; + float4 P1 = kernel_tex_fetch(__curve_keys, k0); + float4 P2 = kernel_tex_fetch(__curve_keys, k1); + + float l = len(P2 - P1); // XXX slower - float4 P1 = kernel_tex_fetch(__curve_keys, v1); - float4 P2 = kernel_tex_fetch(__curve_keys, v2); float r1 = P1.w; float r2 = P2.w; float3 tg = float4_to_float3(P2 - P1) / l; @@ -419,15 +421,15 @@ __device void light_sample(KernelGlobals *kg, float randt, float randu, float ra float4 l = kernel_tex_fetch(__light_distribution, index); int prim = __float_as_int(l.y); #ifdef __HAIR__ -/* currently use l.z to indicate is strand sample which isn't ideal */ - bool is_curve = __float_as_int(l.z) == 0.0f; + int segment = __float_as_int(l.z); #endif if(prim >= 0) { int object = __float_as_int(l.w); + #ifdef __HAIR__ - if (is_curve) - curve_seg_light_sample(kg, prim, object, randu, randv, time, ls); + if (segment != ~0) + curve_segment_light_sample(kg, prim, object, segment, randu, randv, time, ls); else #endif triangle_light_sample(kg, prim, object, randu, randv, time, ls); |