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https://github.com/blender/blender
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7933f92f89
Use packed_float3 instead of float3 for geometry positions and various other arrays. Add and use unified accessor methods get_position() and get_radius() for all geometry, as well as num_verts(), num_points() and num_keys(). Pull Request: https://projects.blender.org/blender/blender/pulls/158728
80 lines
1.8 KiB
C
80 lines
1.8 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 "util/math.h"
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#include "util/types.h"
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CCL_NAMESPACE_BEGIN
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/* NOTE: svm_ramp.h, svm_ramp_util.h and node_ramp_util.h must stay consistent */
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ccl_device_inline float3 rgb_ramp_lookup(
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const packed_float3 *ramp, float f, bool interpolate, bool extrapolate, const int table_size)
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{
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if ((f < 0.0f || f > 1.0f) && extrapolate) {
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float3 t0;
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float3 dy;
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if (f < 0.0f) {
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t0 = ramp[0];
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dy = t0 - ramp[1], f = -f;
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}
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else {
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t0 = ramp[table_size - 1];
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dy = t0 - ramp[table_size - 2];
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f = f - 1.0f;
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}
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return t0 + dy * f * (table_size - 1);
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}
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f = clamp(f, 0.0f, 1.0f) * (table_size - 1);
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/* clamp int as well in case of NaN */
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const int i = clamp(float_to_int(f), 0, table_size - 1);
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const float t = f - (float)i;
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float3 result = ramp[i];
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if (interpolate && t > 0.0f) {
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result = (1.0f - t) * result + t * ramp[i + 1];
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}
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return result;
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}
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ccl_device float float_ramp_lookup(
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const float *ramp, float f, bool interpolate, bool extrapolate, const int table_size)
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{
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if ((f < 0.0f || f > 1.0f) && extrapolate) {
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float t0;
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float dy;
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if (f < 0.0f) {
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t0 = ramp[0];
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dy = t0 - ramp[1], f = -f;
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}
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else {
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t0 = ramp[table_size - 1];
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dy = t0 - ramp[table_size - 2];
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f = f - 1.0f;
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}
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return t0 + dy * f * (table_size - 1);
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}
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f = clamp(f, 0.0f, 1.0f) * (table_size - 1);
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/* clamp int as well in case of NaN */
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const int i = clamp(float_to_int(f), 0, table_size - 1);
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const float t = f - (float)i;
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float result = ramp[i];
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if (interpolate && t > 0.0f) {
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result = (1.0f - t) * result + t * ramp[i + 1];
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}
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return result;
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}
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CCL_NAMESPACE_END
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