-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy path08-shader-binding-table.cpp
232 lines (216 loc) · 9.86 KB
/
08-shader-binding-table.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
#include "../framework/vulkanRtApp.h"
#include "../framework/rayTracingPipeline.h"
#include "../framework/objModel.h"
#include "../framework/utilities.h"
class ShaderBindingTableApp : public VulkanRayTracingApp
{
struct DescriptorSetTable: magma::DescriptorSetTable
{
magma::descriptor::UniformBuffer view = 0;
magma::descriptor::AccelerationStructure topLevel = 1;
magma::descriptor::StorageBuffer bufferReferences = 2;
magma::descriptor::StorageBuffer normalMatrices = 3;
magma::descriptor::UniformBuffer lightSource = 4;
magma::descriptor::CombinedImageImmutableSampler diffuseMap = 5;
MAGMA_REFLECT(view, topLevel, bufferReferences, normalMatrices, lightSource, diffuseMap)
} setTable;
std::unique_ptr<ObjModel> model;
std::unique_ptr<magma::AccelerationStructureInstanceBuffer<magma::AccelerationStructureInstance>> instanceBuffer;
magma::AccelerationStructureGeometryInstances geometryInstances;
std::unique_ptr<magma::TopLevelAccelerationStructure> topLevel;
std::unique_ptr<magma::StorageBuffer> bufferReferences;
std::unique_ptr<magma::DynamicStorageBuffer> normalMatrices;
std::unique_ptr<magma::UniformBuffer<rapid::float4a>> lightPos;
std::unique_ptr<magma::Sampler> bilinearSampler;
std::unique_ptr<magma::DescriptorSet> descriptorSet;
std::unique_ptr<magma::RayTracingPipeline> pipeline;
magma::ShaderBindingTable shaderBindingTable;
public:
ShaderBindingTableApp(const AppEntry& entry):
VulkanRayTracingApp(entry, TEXT("Shader binding table"), 512, 512)
{
setupView();
loadModel("ball/10487_basketball_v1_3dmax2011_it2.obj", true);
createReferenceBuffer();
createInstanceBuffer();
buildTopLevelAccelerationStructure();
createTransformBuffer();
createUniformBuffer();
setupDescriptorSet();
setupPipeline();
recordCommandBuffer(Buffer::Front);
recordCommandBuffer(Buffer::Back);
timer->run();
}
void render(uint32_t bufferIndex) override
{
updateWorldTransforms();
submitCommandBuffer(bufferIndex);
}
void setupView()
{
const rapid::vector3 eye(0.f, 0.f, 150.f);
const rapid::vector3 center(0.f, 0.f, 0.f);
const rapid::vector3 up(0.f, 1.f, 0.f);
constexpr float fov = rapid::radians(45.f);
const float aspect = width/(float)height;
constexpr float zn = 0.1f, zf = 1.f;
const rapid::matrix view = rapid::lookAtRH(eye, center, up);
const rapid::matrix proj = rapid::perspectiveFovRH(fov, aspect, zn, zf);
magma::map(viewUniforms,
[&view, &proj](View *data)
{
data->viewInv = rapid::inverse(view);
data->projInv = rapid::inverse(rapid::negateY(proj));
data->viewProjInv = data->projInv * rapid::matrix3(data->viewInv);
});
}
void updateWorldTransforms()
{
const rapid::matrix pitch = rapid::rotationX(rapid::radians(spinY/2.f));
const rapid::matrix yaw = rapid::rotationY(rapid::radians(spinX/2.f));
const rapid::matrix rotation = pitch * yaw;
magma::map<rapid::matrix>(normalMatrices,
[&rotation, this](rapid::matrix *normalMatrices)
{
constexpr rapid::float2 offsets[4] = {
{-30.f, 30.f},
{30.f, 30.f},
{-30.f, -30.f},
{30.f, -30.f}
};
for (uint32_t i = 0; i < instanceBuffer->getInstanceCount(); ++i)
{
const rapid::matrix translation = rapid::translation(offsets[i].x, offsets[i].y, 0.f);
const rapid::matrix world = rotation * translation;
world.store(instanceBuffer->getInstance(i).transform.matrix);
normalMatrices[i] = rapid::transpose(rapid::inverse(world));
}
});
}
void loadModel(const std::string& fileName, bool swapYZ)
{
model = std::make_unique<ObjModel>(fileName, cmdCompute, false, swapYZ);
}
void createReferenceBuffer()
{
vector<VkDeviceAddress> addresses;
for (auto const& mesh: model->getMeshes())
{ // Hit shader loads mesh data from these buffers
addresses.push_back(mesh.getVertexBuffer()->getDeviceAddress());
addresses.push_back(mesh.getIndexBuffer()->getDeviceAddress());
}
bufferReferences = utilities::makeStorageBuffer(addresses, cmdBufferCopy, allocator);
}
void createInstanceBuffer()
{
instanceBuffer = std::make_unique<magma::AccelerationStructureInstanceBuffer<magma::AccelerationStructureInstance>>(device, 4);
for (uint32_t i = 0; i < instanceBuffer->getInstanceCount(); ++i)
{
magma::AccelerationStructureInstance& instance = instanceBuffer->getInstance(i);
instance.instanceShaderBindingTableRecordOffset = i; // Assign hit shader
instance.accelerationStructureReference = model->getAccelerationStructure()->getReference();
}
geometryInstances = magma::AccelerationStructureGeometryInstances(instanceBuffer.get());
}
void buildTopLevelAccelerationStructure()
{
topLevel = std::make_unique<magma::TopLevelAccelerationStructure>(device, geometryInstances,
VK_ACCELERATION_STRUCTURE_BUILD_TYPE_DEVICE_KHR,
VK_BUILD_ACCELERATION_STRUCTURE_PREFER_FAST_BUILD_BIT_KHR | VK_BUILD_ACCELERATION_STRUCTURE_ALLOW_UPDATE_BIT_KHR);
scratchBuffer = allocateScratchBuffer(topLevel->getBuildScratchSize());
cmdCompute->reset();
cmdCompute->begin(VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT);
{
instanceBuffer->updateModified(cmdCompute);
cmdCompute->pipelineBarrier(
VK_PIPELINE_STAGE_TRANSFER_BIT,
VK_PIPELINE_STAGE_ACCELERATION_STRUCTURE_BUILD_BIT_KHR,
magma::barrier::memory::transferWriteAccelerationStructureRead);
cmdCompute->buildAccelerationStructure(topLevel, geometryInstances, scratchBuffer);
}
cmdCompute->end();
magma::finish(cmdCompute, computeQueue);
}
void createTransformBuffer()
{
normalMatrices = std::make_unique<magma::DynamicStorageBuffer>(device,
sizeof(rapid::matrix) * instanceBuffer->getInstanceCount(), true);
}
void createUniformBuffer()
{
lightPos = std::make_unique<magma::UniformBuffer<rapid::float4a>>(device);
magma::map(lightPos,
[](rapid::float4a *lightPos)
{
lightPos->x = 0.f;
lightPos->y = 0.f;
lightPos->z = 100.f;
});
}
void setupDescriptorSet()
{
bilinearSampler = std::make_unique<magma::Sampler>(device, magma::sampler::magMinLinearMipNearestClampToEdge);
setTable.view = viewUniforms;
setTable.topLevel = topLevel;
setTable.bufferReferences = bufferReferences;
setTable.normalMatrices = normalMatrices;
setTable.lightSource = lightPos;
setTable.diffuseMap = {model->getMaterials().front().diffuseMap, bilinearSampler};
descriptorSet = std::make_unique<magma::DescriptorSet>(descriptorPool, setTable,
VK_SHADER_STAGE_RAYGEN_BIT_KHR | VK_SHADER_STAGE_CLOSEST_HIT_BIT_KHR);
}
void setupPipeline()
{
const std::vector<magma::RayTracingShaderGroup> shaderGroups{
magma::TrianglesHitRayTracingShaderGroup(0),
magma::TrianglesHitRayTracingShaderGroup(1),
magma::TrianglesHitRayTracingShaderGroup(2),
magma::TrianglesHitRayTracingShaderGroup(3),
magma::GeneralRayTracingShaderGroup(4),
magma::GeneralRayTracingShaderGroup(5)
};
auto layout = std::unique_ptr<magma::PipelineLayout>(new magma::PipelineLayout(
{
descriptorSet->getLayout(),
swapchainDescriptorSets.front()->getLayout(),
}));
pipeline = std::unique_ptr<magma::RayTracingPipeline>(new RayTracingPipeline(device,
{"normal", "lambert", "diffuse", "phong", "trace", "miss"}, shaderGroups, 1, std::move(layout)));
constexpr rapid::float3 backgroundColor(0.5f, 0.5f, 0.5f);
shaderBindingTable.addShaderRecord(VK_SHADER_STAGE_MISS_BIT_KHR, 5, backgroundColor);
shaderBindingTable.build(pipeline, cmdBufferCopy);
}
void recordCommandBuffer(uint32_t index)
{
std::shared_ptr<magma::CommandBuffer>& cmdBuffer = commandBuffers[index];
magma::Image *backBuffer = swapchainImageViews[index]->getImage();
cmdBuffer->begin();
{
backBuffer->layoutTransition(VK_IMAGE_LAYOUT_GENERAL, cmdBuffer);
instanceBuffer->updateWhole(cmdBuffer);
cmdBuffer->pipelineBarrier(
VK_PIPELINE_STAGE_TRANSFER_BIT,
VK_PIPELINE_STAGE_ACCELERATION_STRUCTURE_BUILD_BIT_KHR,
magma::barrier::memory::transferWriteAccelerationStructureRead);
cmdBuffer->updateAccelerationStructure(topLevel, geometryInstances, scratchBuffer);
cmdBuffer->pipelineBarrier(
VK_PIPELINE_STAGE_ACCELERATION_STRUCTURE_BUILD_BIT_KHR,
VK_PIPELINE_STAGE_RAY_TRACING_SHADER_BIT_KHR,
magma::barrier::memory::accelerationStructureWriteShaderRead);
cmdBuffer->bindPipeline(pipeline);
cmdBuffer->bindDescriptorSets(pipeline, 0,
{
descriptorSet,
swapchainDescriptorSets[index]
});
cmdBuffer->traceRays(shaderBindingTable, width, height, 1);
backBuffer->layoutTransition(VK_IMAGE_LAYOUT_PRESENT_SRC_KHR, cmdBuffer);
}
cmdBuffer->end();
}
};
std::unique_ptr<IApplication> appFactory(const AppEntry& entry)
{
return std::unique_ptr<ShaderBindingTableApp>(new ShaderBindingTableApp(entry));
}