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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
109 lines
3.4 KiB
C
109 lines
3.4 KiB
C
/* SPDX-FileCopyrightText: 2011-2022 Blender Foundation
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*
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* SPDX-License-Identifier: Apache-2.0 */
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#pragma once
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#include "kernel/svm/fractal_noise.h"
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#include "kernel/svm/node_types.h"
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#include "kernel/svm/util.h"
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CCL_NAMESPACE_BEGIN
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/* Wave */
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ccl_device_noinline_cpu float svm_wave(NodeWaveType type,
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NodeWaveBandsDirection bands_dir,
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NodeWaveRingsDirection rings_dir,
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NodeWaveProfile profile,
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float3 p,
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const float distortion,
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const float detail,
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const float dscale,
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const float droughness,
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const float phase)
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{
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/* Prevent precision issues on unit coordinates. */
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p = (p + 0.000001f) * 0.999999f;
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float n;
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if (type == NODE_WAVE_BANDS) {
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if (bands_dir == NODE_WAVE_BANDS_DIRECTION_X) {
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n = p.x * 20.0f;
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}
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else if (bands_dir == NODE_WAVE_BANDS_DIRECTION_Y) {
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n = p.y * 20.0f;
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}
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else if (bands_dir == NODE_WAVE_BANDS_DIRECTION_Z) {
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n = p.z * 20.0f;
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}
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else { /* NODE_WAVE_BANDS_DIRECTION_DIAGONAL */
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n = (p.x + p.y + p.z) * 10.0f;
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}
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}
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else { /* NODE_WAVE_RINGS */
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float3 rp = p;
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if (rings_dir == NODE_WAVE_RINGS_DIRECTION_X) {
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rp *= make_float3(0.0f, 1.0f, 1.0f);
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}
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else if (rings_dir == NODE_WAVE_RINGS_DIRECTION_Y) {
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rp *= make_float3(1.0f, 0.0f, 1.0f);
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}
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else if (rings_dir == NODE_WAVE_RINGS_DIRECTION_Z) {
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rp *= make_float3(1.0f, 1.0f, 0.0f);
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}
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/* else: NODE_WAVE_RINGS_DIRECTION_SPHERICAL */
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n = len(rp) * 20.0f;
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}
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n += phase;
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if (distortion != 0.0f) {
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n += distortion * (noise_fbm(p * dscale, detail, droughness, 2.0f, true) * 2.0f - 1.0f);
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}
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if (profile == NODE_WAVE_PROFILE_SIN) {
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return 0.5f + 0.5f * sinf(n - M_PI_2_F);
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}
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if (profile == NODE_WAVE_PROFILE_SAW) {
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n /= M_2PI_F;
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return n - floorf(n);
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}
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/* NODE_WAVE_PROFILE_TRI */
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n /= M_2PI_F;
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return fabsf(n - floorf(n + 0.5f)) * 2.0f;
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}
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ccl_device_noinline void svm_node_tex_wave(ccl_private float *ccl_restrict stack,
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const ccl_global SVMNodeTexWave &ccl_restrict node)
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{
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const float3 co = stack_load_float3(stack, node.co);
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const float scale = stack_load(stack, node.scale);
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const float distortion = stack_load(stack, node.distortion);
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const float detail = stack_load(stack, node.detail);
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const float dscale = stack_load(stack, node.dscale);
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const float droughness = stack_load(stack, node.droughness);
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const float phase = stack_load(stack, node.phase);
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const float f = svm_wave(node.wave_type,
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node.bands_direction,
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node.rings_direction,
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node.profile,
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co * scale,
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distortion,
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detail,
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dscale,
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droughness,
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phase);
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if (stack_valid(node.fac_offset)) {
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stack_store_float(stack, node.fac_offset, f);
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}
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if (stack_valid(node.color_offset)) {
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stack_store_float3(stack, node.color_offset, make_float3(f, f, f));
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}
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}
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CCL_NAMESPACE_END
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