134 lines
3.7 KiB
C
134 lines
3.7 KiB
C
/* SPDX-FileCopyrightText: 2011-2022 Blender Foundation
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0 */
|
|
|
|
#pragma once
|
|
|
|
#include "kernel/svm/util.h"
|
|
|
|
CCL_NAMESPACE_BEGIN
|
|
|
|
/* Magic */
|
|
|
|
ccl_device_noinline_cpu float3 svm_magic(const float3 p,
|
|
const float scale,
|
|
const int n,
|
|
float distortion)
|
|
{
|
|
/*
|
|
* Prevent NaNs due to input p
|
|
* Sin and Cosine are periodic about [0 2*PI) so the following
|
|
* will yield a more accurate result. As it stops the input values
|
|
* going out of range for floats which caused a NaN. The
|
|
* calculation of (px + py + pz)*5 can cause an Inf when one or more
|
|
* values are very large the cos or sin of this results in a NaN
|
|
* It also addresses the case where one dimension is large relative
|
|
* to another which caused banding due to the loss of precision in the
|
|
* smaller value. This is due to the value in the -2*PI to 2*PI range
|
|
* effectively being lost due to floating point precision.
|
|
*/
|
|
const float px = fmodf(p.x, M_2PI_F);
|
|
const float py = fmodf(p.y, M_2PI_F);
|
|
const float pz = fmodf(p.z, M_2PI_F);
|
|
|
|
float x = sinf((px + py + pz) * 5.0f * scale);
|
|
float y = cosf((-px + py - pz) * 5.0f * scale);
|
|
float z = -cosf((-px - py + pz) * 5.0f * scale);
|
|
|
|
if (n > 0) {
|
|
x *= distortion;
|
|
y *= distortion;
|
|
z *= distortion;
|
|
y = -cosf(x - y + z);
|
|
y *= distortion;
|
|
|
|
if (n > 1) {
|
|
x = cosf(x - y - z);
|
|
x *= distortion;
|
|
|
|
if (n > 2) {
|
|
z = sinf(-x - y - z);
|
|
z *= distortion;
|
|
|
|
if (n > 3) {
|
|
x = -cosf(-x + y - z);
|
|
x *= distortion;
|
|
|
|
if (n > 4) {
|
|
y = -sinf(-x + y + z);
|
|
y *= distortion;
|
|
|
|
if (n > 5) {
|
|
y = -cosf(-x + y + z);
|
|
y *= distortion;
|
|
|
|
if (n > 6) {
|
|
x = cosf(x + y + z);
|
|
x *= distortion;
|
|
|
|
if (n > 7) {
|
|
z = sinf(x + y - z);
|
|
z *= distortion;
|
|
|
|
if (n > 8) {
|
|
x = -cosf(-x - y + z);
|
|
x *= distortion;
|
|
|
|
if (n > 9) {
|
|
y = -sinf(x - y + z);
|
|
y *= distortion;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (distortion != 0.0f) {
|
|
distortion *= 2.0f;
|
|
x /= distortion;
|
|
y /= distortion;
|
|
z /= distortion;
|
|
}
|
|
|
|
return make_float3(0.5f - x, 0.5f - y, 0.5f - z);
|
|
}
|
|
|
|
ccl_device_noinline int svm_node_tex_magic(KernelGlobals kg,
|
|
ccl_private ShaderData *sd,
|
|
ccl_private float *stack,
|
|
const uint4 node,
|
|
int offset)
|
|
{
|
|
uint depth;
|
|
uint scale_offset;
|
|
uint distortion_offset;
|
|
uint co_offset;
|
|
uint fac_offset;
|
|
uint color_offset;
|
|
|
|
svm_unpack_node_uchar3(node.y, &depth, &color_offset, &fac_offset);
|
|
svm_unpack_node_uchar3(node.z, &co_offset, &scale_offset, &distortion_offset);
|
|
|
|
const uint4 node2 = read_node(kg, &offset);
|
|
const float3 co = stack_load_float3(stack, co_offset);
|
|
const float scale = stack_load_float_default(stack, scale_offset, node2.x);
|
|
const float distortion = stack_load_float_default(stack, distortion_offset, node2.y);
|
|
|
|
const float3 color = svm_magic(co, scale, depth, distortion);
|
|
|
|
if (stack_valid(fac_offset)) {
|
|
stack_store_float(stack, fac_offset, average(color));
|
|
}
|
|
if (stack_valid(color_offset)) {
|
|
stack_store_float3(stack, color_offset, color);
|
|
}
|
|
return offset;
|
|
}
|
|
|
|
CCL_NAMESPACE_END
|