diff options
Diffstat (limited to 'intern/cycles/kernel/svm/svm_blackbody.h')
| -rw-r--r-- | intern/cycles/kernel/svm/svm_blackbody.h | 40 |
1 files changed, 2 insertions, 38 deletions
diff --git a/intern/cycles/kernel/svm/svm_blackbody.h b/intern/cycles/kernel/svm/svm_blackbody.h index 1e40e868e14..b750ad87b7f 100644 --- a/intern/cycles/kernel/svm/svm_blackbody.h +++ b/intern/cycles/kernel/svm/svm_blackbody.h @@ -36,48 +36,12 @@ CCL_NAMESPACE_BEGIN ccl_device void svm_node_blackbody(KernelGlobals *kg, ShaderData *sd, float *stack, uint temperature_offset, uint col_offset) { - /* Output */ - float3 color_rgb = make_float3(0.0f, 0.0f, 0.0f); - /* Input */ float temperature = stack_load_float(stack, temperature_offset); - if (temperature < BB_DRAPER) { - /* just return very very dim red */ - color_rgb = make_float3(1.0e-6f,0.0f,0.0f); - } - else if (temperature <= BB_MAX_TABLE_RANGE) { - /* This is the overall size of the table */ - const int lookuptablesize = 956; - const float lookuptablenormalize = 1.0f/956.0f; - - /* reconstruct a proper index for the table lookup, compared to OSL we don't look up two colors - just one (the OSL-lerp is also automatically done for us by "lookup_table_read") */ - float t = powf((temperature - BB_DRAPER) * (1.0f / BB_TABLE_SPACING), (1.0f / BB_TABLE_XPOWER)); - - int blackbody_table_offset = kernel_data.tables.blackbody_offset; - - /* Retrieve colors from the lookup table */ - float lutval = t*lookuptablenormalize; - float R = lookup_table_read(kg, lutval, blackbody_table_offset, lookuptablesize); - lutval = (t + 319.0f*1.0f)*lookuptablenormalize; - float G = lookup_table_read(kg, lutval, blackbody_table_offset, lookuptablesize); - lutval = (t + 319.0f*2.0f)*lookuptablenormalize; - float B = lookup_table_read(kg, lutval, blackbody_table_offset, lookuptablesize); - - R = powf(R, BB_TABLE_YPOWER); - G = powf(G, BB_TABLE_YPOWER); - B = powf(B, BB_TABLE_YPOWER); - - color_rgb = make_float3(R, G, B); - } - - /* Luminance */ - float l = linear_rgb_to_gray(color_rgb); - if (l != 0.0f) - color_rgb /= l; + float3 color_rgb = svm_math_blackbody_color(temperature); - if (stack_valid(col_offset)) + if(stack_valid(col_offset)) stack_store_float3(stack, col_offset, color_rgb); } |