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Add ray traced glTF sample (#1083)

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* Started working on a ray tracing glTF sample

* Started working on a ray tracing glTF sample

Added textures using descriptor indexing

* Frame accumulation

Pass glTF node transforms to BLAS build

* Shader cleanup

* Code cleanup, flip Y using TLAS transform matrix

* Create AS for all primitives in the gltf scene

* Remove unused variables

* Added missing shaders

* Minor cleanup
This commit is contained in:
Sascha Willems 2023-11-01 10:55:33 +01:00 • committed by GitHub
parent e006185ca0
commit 5962189427
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18 changed files with 1109 additions and 2 deletions
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shaders/glsl/raytracinggltf/anyhit.rahit Normal file
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/* Copyright (c) 2023, Sascha Willems
*
* SPDX-License-Identifier: MIT
*
*/
#version 460
#extension GL_EXT_ray_tracing : require
#extension GL_GOOGLE_include_directive : require
#extension GL_EXT_nonuniform_qualifier : require
#extension GL_EXT_buffer_reference2 : require
#extension GL_EXT_scalar_block_layout : require
#extension GL_EXT_shader_explicit_arithmetic_types_int64 : require
layout(location = 0) rayPayloadInEXT vec3 hitValue;
layout(location = 3) rayPayloadInEXT uint payloadSeed;
hitAttributeEXT vec2 attribs;
layout(binding = 3, set = 0) uniform sampler2D image;
struct GeometryNode {
uint64_t vertexBufferDeviceAddress;
uint64_t indexBufferDeviceAddress;
int textureIndexBaseColor;
int textureIndexOcclusion;
};
layout(binding = 4, set = 0) buffer GeometryNodes { GeometryNode nodes[]; } geometryNodes;
layout(binding = 5, set = 0) uniform sampler2D textures[];
#include "bufferreferences.glsl"
#include "geometrytypes.glsl"
#include "random.glsl"
void main()
{
Triangle tri = unpackTriangle(gl_PrimitiveID, 112);
GeometryNode geometryNode = geometryNodes.nodes[gl_GeometryIndexEXT];
vec4 color = texture(textures[nonuniformEXT(geometryNode.textureIndexBaseColor)], tri.uv);
// If the alpha value of the texture at the current UV coordinates is below a given threshold, we'll ignore this intersection
// That way ray traversal will be stopped and the miss shader will be invoked
// if (color.a < 0.9) {
//if (((gl_LaunchIDEXT.y * gl_LaunchSizeEXT.x + gl_LaunchIDEXT.x) % 4) == 0) {
if(rnd(payloadSeed) > color.a) {
ignoreIntersectionEXT;
}
// }
}