fe213f80a4
This is the first step of moving the create infos back inside shader sources. All info files are now treated as source files. However, they are not considered in the include tree yet. This will come in another following PR. Each shader source file now generate a `.info` file containing only the create info declarations. This renames all info files so that they do not conflict with their previous versions that were copied (non-generated). Pull Request: https://projects.blender.org/blender/blender/pulls/146676
65 lines
2.2 KiB
GLSL
65 lines
2.2 KiB
GLSL
/* SPDX-FileCopyrightText: 2018-2022 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_2D_nodelink_infos.hh"
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FRAGMENT_SHADER_CREATE_INFO(gpu_shader_2D_nodelink)
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#define ANTIALIAS 0.75f
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float get_line_alpha(float center, float relative_radius)
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{
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float radius = relative_radius * interp_flat.line_thickness;
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float sdf = abs(interp_flat.line_thickness * (interp.line_uv.y - center));
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return smoothstep(radius, radius - ANTIALIAS, sdf);
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}
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void main()
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{
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float dash_frag_alpha = 1.0f;
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if (interp_flat.dash_factor < 1.0f) {
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float distance_along_line = interp_flat.line_length * interp.line_uv.x;
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/* Checking if `normalized_distance <= interp.dash_factor` is already enough for a basic
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* dash, however we want to handle a nice anti-alias. */
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float dash_center = interp_flat.dash_length * interp_flat.dash_factor * 0.5f;
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float normalized_distance_triangle =
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1.0f -
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abs((fract((distance_along_line - dash_center) / interp_flat.dash_length)) * 2.0f - 1.0f);
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float t = interp_flat.aspect * ANTIALIAS / interp_flat.dash_length;
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float slope = 1.0f / (2.0f * t);
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float unclamped_alpha = 1.0f -
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slope * (normalized_distance_triangle - interp_flat.dash_factor + t);
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float alpha = max(interp_flat.dash_alpha, min(unclamped_alpha, 1.0f));
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dash_frag_alpha = alpha;
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}
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if (interp_flat.is_main_line == 0) {
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out_color = interp.final_color;
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out_color.a *= get_line_alpha(0.5f, 0.5f) * dash_frag_alpha;
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return;
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}
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if (interp_flat.has_back_link == 0) {
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out_color = interp.final_color;
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out_color.a *= get_line_alpha(0.5f, 0.5f) * dash_frag_alpha;
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}
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else {
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/* Draw two links right next to each other, the main link and the back-link. */
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float4 main_link_color = interp.final_color;
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main_link_color.a *= get_line_alpha(0.75f, 0.3f);
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float4 back_link_color = float4(float3(0.8f), 1.0f);
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back_link_color.a *= get_line_alpha(0.2f, 0.25f);
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/* Combine both links. */
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out_color.rgb = main_link_color.rgb * main_link_color.a +
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back_link_color.rgb * back_link_color.a;
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out_color.a = main_link_color.a * dash_frag_alpha + back_link_color.a;
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}
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}
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