diff options
Diffstat (limited to 'intern/cycles/kernel/closure/bsdf_diffuse_ramp.h')
| -rw-r--r-- | intern/cycles/kernel/closure/bsdf_diffuse_ramp.h | 101 |
1 files changed, 59 insertions, 42 deletions
diff --git a/intern/cycles/kernel/closure/bsdf_diffuse_ramp.h b/intern/cycles/kernel/closure/bsdf_diffuse_ramp.h index ca33a5b275c..9d13eb8d4e0 100644 --- a/intern/cycles/kernel/closure/bsdf_diffuse_ramp.h +++ b/intern/cycles/kernel/closure/bsdf_diffuse_ramp.h @@ -38,73 +38,90 @@ CCL_NAMESPACE_BEGIN #ifdef __OSL__ typedef ccl_addr_space struct DiffuseRampBsdf { - SHADER_CLOSURE_BASE; + SHADER_CLOSURE_BASE; - float3 *colors; + float3 *colors; } DiffuseRampBsdf; ccl_device float3 bsdf_diffuse_ramp_get_color(const float3 colors[8], float pos) { - int MAXCOLORS = 8; - - float npos = pos * (float)(MAXCOLORS - 1); - int ipos = float_to_int(npos); - if(ipos < 0) - return colors[0]; - if(ipos >= (MAXCOLORS - 1)) - return colors[MAXCOLORS - 1]; - float offset = npos - (float)ipos; - return colors[ipos] * (1.0f - offset) + colors[ipos+1] * offset; + int MAXCOLORS = 8; + + float npos = pos * (float)(MAXCOLORS - 1); + int ipos = float_to_int(npos); + if (ipos < 0) + return colors[0]; + if (ipos >= (MAXCOLORS - 1)) + return colors[MAXCOLORS - 1]; + float offset = npos - (float)ipos; + return colors[ipos] * (1.0f - offset) + colors[ipos + 1] * offset; } ccl_device int bsdf_diffuse_ramp_setup(DiffuseRampBsdf *bsdf) { - bsdf->type = CLOSURE_BSDF_DIFFUSE_RAMP_ID; - return SD_BSDF|SD_BSDF_HAS_EVAL; + bsdf->type = CLOSURE_BSDF_DIFFUSE_RAMP_ID; + return SD_BSDF | SD_BSDF_HAS_EVAL; } ccl_device void bsdf_diffuse_ramp_blur(ShaderClosure *sc, float roughness) { } -ccl_device float3 bsdf_diffuse_ramp_eval_reflect(const ShaderClosure *sc, const float3 I, const float3 omega_in, float *pdf) +ccl_device float3 bsdf_diffuse_ramp_eval_reflect(const ShaderClosure *sc, + const float3 I, + const float3 omega_in, + float *pdf) { - const DiffuseRampBsdf *bsdf = (const DiffuseRampBsdf*)sc; - float3 N = bsdf->N; + const DiffuseRampBsdf *bsdf = (const DiffuseRampBsdf *)sc; + float3 N = bsdf->N; - float cos_pi = fmaxf(dot(N, omega_in), 0.0f); - *pdf = cos_pi * M_1_PI_F; - return bsdf_diffuse_ramp_get_color(bsdf->colors, cos_pi) * M_1_PI_F; + float cos_pi = fmaxf(dot(N, omega_in), 0.0f); + *pdf = cos_pi * M_1_PI_F; + return bsdf_diffuse_ramp_get_color(bsdf->colors, cos_pi) * M_1_PI_F; } -ccl_device float3 bsdf_diffuse_ramp_eval_transmit(const ShaderClosure *sc, const float3 I, const float3 omega_in, float *pdf) +ccl_device float3 bsdf_diffuse_ramp_eval_transmit(const ShaderClosure *sc, + const float3 I, + const float3 omega_in, + float *pdf) { - return make_float3(0.0f, 0.0f, 0.0f); + return make_float3(0.0f, 0.0f, 0.0f); } -ccl_device int bsdf_diffuse_ramp_sample(const ShaderClosure *sc, float3 Ng, float3 I, float3 dIdx, float3 dIdy, float randu, float randv, float3 *eval, float3 *omega_in, float3 *domega_in_dx, float3 *domega_in_dy, float *pdf) +ccl_device int bsdf_diffuse_ramp_sample(const ShaderClosure *sc, + float3 Ng, + float3 I, + float3 dIdx, + float3 dIdy, + float randu, + float randv, + float3 *eval, + float3 *omega_in, + float3 *domega_in_dx, + float3 *domega_in_dy, + float *pdf) { - const DiffuseRampBsdf *bsdf = (const DiffuseRampBsdf*)sc; - float3 N = bsdf->N; - - // distribution over the hemisphere - sample_cos_hemisphere(N, randu, randv, omega_in, pdf); - - if(dot(Ng, *omega_in) > 0.0f) { - *eval = bsdf_diffuse_ramp_get_color(bsdf->colors, *pdf * M_PI_F) * M_1_PI_F; -#ifdef __RAY_DIFFERENTIALS__ - *domega_in_dx = (2 * dot(N, dIdx)) * N - dIdx; - *domega_in_dy = (2 * dot(N, dIdy)) * N - dIdy; -#endif - } - else - *pdf = 0.0f; - - return LABEL_REFLECT|LABEL_DIFFUSE; + const DiffuseRampBsdf *bsdf = (const DiffuseRampBsdf *)sc; + float3 N = bsdf->N; + + // distribution over the hemisphere + sample_cos_hemisphere(N, randu, randv, omega_in, pdf); + + if (dot(Ng, *omega_in) > 0.0f) { + *eval = bsdf_diffuse_ramp_get_color(bsdf->colors, *pdf * M_PI_F) * M_1_PI_F; +# ifdef __RAY_DIFFERENTIALS__ + *domega_in_dx = (2 * dot(N, dIdx)) * N - dIdx; + *domega_in_dy = (2 * dot(N, dIdy)) * N - dIdy; +# endif + } + else + *pdf = 0.0f; + + return LABEL_REFLECT | LABEL_DIFFUSE; } -#endif /* __OSL__ */ +#endif /* __OSL__ */ CCL_NAMESPACE_END -#endif /* __BSDF_DIFFUSE_RAMP_H__ */ +#endif /* __BSDF_DIFFUSE_RAMP_H__ */ |