33 lines
950 B
C
33 lines
950 B
C
|
/* SPDX-License-Identifier: BSD-3-Clause
|
||
|
|
*
|
||
|
|
* Adapted from Open Shading Language
|
||
|
|
* Copyright (c) 2009-2010 Sony Pictures Imageworks Inc., et al.
|
||
|
|
* All Rights Reserved.
|
||
|
|
*
|
||
|
|
* Modifications Copyright 2011-2022 Blender Foundation. */
|
||
|
|
|
||
|
|
#pragma once
|
||
|
|
|
||
|
|
#include "kernel/svm/math_util.h"
|
||
|
|
|
||
|
|
CCL_NAMESPACE_BEGIN
|
||
|
|
|
||
|
|
/* Blackbody Node */
|
||
|
|
|
||
|
|
ccl_device_noinline void svm_node_blackbody(KernelGlobals kg,
|
||
|
|
ccl_private ShaderData *sd,
|
||
|
|
ccl_private float *stack,
|
||
|
|
uint temperature_offset,
|
||
|
|
uint col_offset)
|
||
|
|
{
|
||
|
|
/* Input */
|
||
|
|
float temperature = stack_load_float(stack, temperature_offset);
|
||
|
|
|
||
|
|
float3 color_rgb = rec709_to_rgb(kg, svm_math_blackbody_color_rec709(temperature));
|
||
|
|
color_rgb = max(color_rgb, zero_float3());
|
||
|
|
|
||
|
|
stack_store_float3(stack, col_offset, color_rgb);
|
||
|
|
}
|
||
|
|
|
||
|
|
CCL_NAMESPACE_END
|