a961c9050d
Replace usage of `common_math_lib.glsl` (deprecated) with gpu shader libs. Pull Request: https://projects.blender.org/blender/blender/pulls/131579
72 lines
2.2 KiB
GLSL
72 lines
2.2 KiB
GLSL
/* SPDX-FileCopyrightText: 2022-2023 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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/**
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* Compute visibility of each resource bounds for a given view.
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*/
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/* TODO(fclem): This could be augmented by a 2 pass occlusion culling system. */
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#include "draw_view_info.hh"
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#include "common_intersect_lib.glsl"
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COMPUTE_SHADER_CREATE_INFO(draw_visibility_compute)
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void mask_visibility_bit(uint view_id)
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{
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if (view_len > 1) {
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uint index = gl_GlobalInvocationID.x * uint(visibility_word_per_draw) + (view_id / 32u);
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visibility_buf[index] &= ~(1u << view_id);
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}
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else {
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atomicAnd(visibility_buf[gl_WorkGroupID.x], ~(1u << gl_LocalInvocationID.x));
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}
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}
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void main()
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{
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if (int(gl_GlobalInvocationID.x) >= resource_len) {
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return;
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}
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ObjectBounds bounds = bounds_buf[gl_GlobalInvocationID.x];
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if (drw_bounds_are_valid(bounds)) {
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IsectBox box = isect_box_setup(bounds.bounding_corners[0].xyz,
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bounds.bounding_corners[1].xyz,
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bounds.bounding_corners[2].xyz,
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bounds.bounding_corners[3].xyz);
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Sphere bounding_sphere = shape_sphere(bounds.bounding_sphere.xyz, bounds.bounding_sphere.w);
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Sphere inscribed_sphere = shape_sphere(bounds.bounding_sphere.xyz,
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bounds._inner_sphere_radius);
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for (drw_view_id = 0u; drw_view_id < uint(view_len); drw_view_id++) {
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if (drw_view_culling.bound_sphere.w == -1.0) {
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/* View disabled. */
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mask_visibility_bit(drw_view_id);
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}
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else if (intersect_view(inscribed_sphere) == true) {
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/* Visible. */
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}
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else if (intersect_view(bounding_sphere) == false) {
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/* Not visible. */
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mask_visibility_bit(drw_view_id);
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}
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else if (intersect_view(box) == false) {
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/* Not visible. */
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mask_visibility_bit(drw_view_id);
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}
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}
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}
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else {
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/* Culling is disabled, but we need to mask the bits for disabled views. */
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for (drw_view_id = 0u; drw_view_id < uint(view_len); drw_view_id++) {
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if (drw_view_culling.bound_sphere.w == -1.0) {
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/* View disabled. */
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mask_visibility_bit(drw_view_id);
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}
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}
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}
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}
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