dde9d21b91
Includes the following changes to the existing Locomotion system for VR Scene Inspection: * new VR Navigation Preferences and VR Session Settings * changes to XR raycast logic and its visualization * new XR vignette that appears when moving * snap turning Pull Request: https://projects.blender.org/blender/blender/pulls/144241
44 lines
1.3 KiB
GLSL
44 lines
1.3 KiB
GLSL
/* SPDX-FileCopyrightText: 2016-2024 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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#include "infos/gpu_shader_xr_raycast_infos.hh"
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VERTEX_SHADER_CREATE_INFO(gpu_shader_xr_raycast)
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vec3 catmull_rom(vec3 p0, vec3 p1, vec3 p2, vec3 p3, float t)
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{
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float t2 = t * t;
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float t3 = t2 * t;
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return 0.5 * ((2.0 * p1) + (-p0 + p2) * t + (2.0 * p0 - 5.0 * p1 + 4.0 * p2 - p3) * t2 +
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(-p0 + 3.0 * p1 - 3.0 * p2 + p3) * t3);
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}
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vec3 get_control_point(int idx)
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{
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idx = clamp(idx, 0, control_point_count - 1);
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return control_points[idx].xyz;
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}
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void main()
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{
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int sample_idx = gl_VertexID >> 1;
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float side = ((gl_VertexID & 1) != 0) ? -1.0 : 1.0;
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/** Interpolate within the range: [0, segment_count] */
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float sample_value = float(sample_idx) * float(control_point_count - 1) /
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float(sample_count - 1);
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int segment_idx = int(sample_value);
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float t = sample_value - float(segment_idx);
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vec3 p0 = get_control_point(segment_idx - 1);
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vec3 p1 = get_control_point(segment_idx + 0);
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vec3 p2 = get_control_point(segment_idx + 1);
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vec3 p3 = get_control_point(segment_idx + 2);
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vec3 pos = catmull_rom(p0, p1, p2, p3, t) + 0.5 * width * side * right_vector;
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gl_Position = ModelViewProjectionMatrix * vec4(pos, 1.0);
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}
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