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6e7a0eee32
Cycles implementation of #157799. Allows removing objects from Raycast Node queries. Adds `PathRayVisibilityFlag::PATH_RAY_VISIBILITY_RAYCAST` . OSL adds a new `__raycast__` traceset. Pull Request: https://projects.blender.org/blender/blender/pulls/158816
70 lines
2.5 KiB
Text
70 lines
2.5 KiB
Text
/* SPDX-FileCopyrightText: 2011-2025 Blender Foundation
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*
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* SPDX-License-Identifier: Apache-2.0 */
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#include "stdcycles.h"
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shader node_raycast(point Position = P,
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normal Direction = N,
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float Length = 1.0,
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int only_local = 0,
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float bump_filter_width = 0.0,
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string float_attribute_names[] = {},
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string alpha_attribute_names[] = {},
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string vector_attribute_names[] = {},
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output float IsHit = 0.0,
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output float SelfHit = 0.0,
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output float HitDistance = Length,
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output point HitPosition = point(0.0, 0.0, 0.0),
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output normal HitNormal = normal(0.0, 0.0, 0.0),
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output float float_attributes[32] = {},
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output float alpha_attributes[32] = {},
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output vector vector_attributes[32] = {})
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{
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float mindist = 0.0;
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if (bump_filter_width > 0.0) {
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/* If evaluating for bump mapping at a shifted position, increase min
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* distance by slightly more than the shift distance to avoid self
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* intersections. */
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mindist = bump_filter_width * max(length(Dx(P)), length(Dy(P))) * 1.1;
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}
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if (trace(Position,
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Direction,
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"maxdist",
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Length,
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"mindist",
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mindist,
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"traceset",
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only_local ? "__only_local__" : "__raycast__"))
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{
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IsHit = 1.0;
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getmessage("trace", "hitself", SelfHit);
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getmessage("trace", "hitdist", HitDistance);
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getmessage("trace", "P", HitPosition);
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getmessage("trace", "N", HitNormal);
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for (int i = 0; i < arraylength(float_attribute_names); ++i) {
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getmessage("trace", float_attribute_names[i], float_attributes[i]);
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}
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for (int i = 0; i < arraylength(alpha_attribute_names); ++i) {
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float data[4] = {0.0, 0.0, 0.0, 0.0};
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getmessage("trace", alpha_attribute_names[i], data);
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alpha_attributes[i] = data[3];
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}
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for (int i = 0; i < arraylength(vector_attribute_names); ++i) {
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getmessage("trace", vector_attribute_names[i], vector_attributes[i]);
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}
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}
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else {
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for (int i = 0; i < arraylength(float_attribute_names); ++i) {
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float_attributes[i] = 0.0;
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}
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for (int i = 0; i < arraylength(alpha_attribute_names); ++i) {
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alpha_attributes[i] = 0.0;
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}
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for (int i = 0; i < arraylength(vector_attribute_names); ++i) {
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vector_attributes[i] = point(0.0, 0.0, 0.0);
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}
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}
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}
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