mirror of
https://github.com/blender/blender
synced 2026-10-25 03:07:01 +03:00
7ee94c067c
* Pass socket links and values in structs for each SVM node. * Always pass default values along with stack offset, encoded in SVMInputFloat and SVMInputFloat3. For slightly more efficient memory access the stack offset is encoded in a NaN float. * Simplify SVMCompiler API to use input_float, input_float3 input_link and output functions, instead of manual stack assignment. This was a leftover from early CUDA versions and old GPUs, where data was stored in textures as there was no L1/L2 cache for global memory. Assisted-by: Claude Opus 4.6 Co-authored-by: Sergey Sharybin <sergey@blender.org> Pull Request: https://projects.blender.org/blender/blender/pulls/156612
36 lines
1.1 KiB
C
36 lines
1.1 KiB
C
/* SPDX-FileCopyrightText: 2009-2010 Sony Pictures Imageworks Inc., et al. All Rights Reserved.
|
|
* SPDX-FileCopyrightText: 2011-2022 Blender Foundation
|
|
*
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*
|
|
* Adapted code from Open Shading Language. */
|
|
|
|
#pragma once
|
|
|
|
#include "kernel/svm/math_util.h"
|
|
#include "kernel/svm/node_types.h"
|
|
#include "kernel/svm/util.h"
|
|
|
|
#include "kernel/util/colorspace.h"
|
|
|
|
CCL_NAMESPACE_BEGIN
|
|
|
|
/* Wavelength to RGB */
|
|
|
|
ccl_device_noinline void svm_node_wavelength(KernelGlobals kg,
|
|
ccl_private float *ccl_restrict stack,
|
|
const ccl_global SVMNodeWavelength &ccl_restrict node)
|
|
{
|
|
const float lambda_nm = stack_load(stack, node.wavelength);
|
|
|
|
float3 color = svm_math_wavelength_color_xyz(lambda_nm);
|
|
color = xyz_to_rgb(kg, color);
|
|
color *= 1.0f / 2.52f; // Empirical scale from lg to make all comps <= 1
|
|
|
|
/* Clamp to zero if values are smaller */
|
|
color = max(color, make_float3(0.0f, 0.0f, 0.0f));
|
|
|
|
stack_store_float3(stack, node.color_offset, color);
|
|
}
|
|
|
|
CCL_NAMESPACE_END
|