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
|
// This file is part of the 64k demo project.
// It implements the drawing logic for Renderer3D.
#include "3d/renderer.h"
#include "util/asset_manager_utils.h"
#include <algorithm>
#include <vector>
void Renderer3D::update_uniforms(const Scene& scene, const Camera& camera,
float time) {
GlobalUniforms globals;
globals.view_proj = camera.get_projection_matrix() * camera.get_view_matrix();
globals.inv_view_proj = globals.view_proj.inverse();
globals.camera_pos_time =
vec4(camera.position.x, camera.position.y, camera.position.z, time);
globals.params =
vec4((float)std::min((size_t)kMaxObjects, scene.objects.size()), 0.0f,
0.0f, 0.0f);
globals.resolution = vec2((float)width_, (float)height_);
globals.padding = vec2(0.0f, 0.0f);
wgpuQueueWriteBuffer(queue_, global_uniform_buffer_, 0, &globals,
sizeof(GlobalUniforms));
std::vector<ObjectData> obj_data;
for (const auto& obj : scene.objects) {
ObjectData data;
data.model = obj.get_model_matrix();
// Calculate Inverse for point transformation
data.inv_model = data.model.inverse();
data.color = obj.color;
float type_id = 0.0f;
switch (obj.type) {
case ObjectType::SPHERE:
type_id = 1.0f;
break;
case ObjectType::BOX:
type_id = 2.0f;
break;
case ObjectType::CUBE:
type_id = 2.0f;
break; // CUBE is same as BOX for shader
case ObjectType::TORUS:
type_id = 3.0f;
break;
case ObjectType::PLANE:
type_id = 4.0f;
break;
case ObjectType::MESH:
type_id = 5.0f;
break;
default:
type_id = 0.0f;
break;
}
data.params = vec4(type_id, obj.local_extent.x, obj.local_extent.y,
obj.local_extent.z);
obj_data.push_back(data);
if (obj_data.size() >= kMaxObjects)
break;
}
if (!obj_data.empty()) {
wgpuQueueWriteBuffer(queue_, object_storage_buffer_, 0, obj_data.data(),
obj_data.size() * sizeof(ObjectData));
}
// Build and upload BVH (always uploaded, used by BVH pipeline)
BVHBuilder::build(cpu_bvh_, scene.objects);
if (!cpu_bvh_.nodes.empty()) {
wgpuQueueWriteBuffer(queue_, bvh_storage_buffer_, 0, cpu_bvh_.nodes.data(),
cpu_bvh_.nodes.size() * sizeof(BVHNode));
}
}
void Renderer3D::draw(WGPURenderPassEncoder pass, const Scene& scene,
const Camera& camera, float time) {
update_uniforms(scene, camera, time);
// Lazy Bind Group creation
if (bind_group_)
wgpuBindGroupRelease(bind_group_);
std::vector<WGPUBindGroupEntry> bg_entries;
{
WGPUBindGroupEntry e = {};
e.binding = 0;
e.buffer = global_uniform_buffer_;
e.size = sizeof(GlobalUniforms);
bg_entries.push_back(e);
}
{
WGPUBindGroupEntry e = {};
e.binding = 1;
e.buffer = object_storage_buffer_;
e.size = sizeof(ObjectData) * kMaxObjects;
bg_entries.push_back(e);
}
if (bvh_enabled_) {
WGPUBindGroupEntry e = {};
e.binding = 2;
e.buffer = bvh_storage_buffer_;
e.size = sizeof(BVHNode) * kMaxObjects * 2;
bg_entries.push_back(e);
}
{
WGPUBindGroupEntry e = {};
e.binding = 3;
e.textureView = noise_texture_view_;
bg_entries.push_back(e);
}
{
WGPUBindGroupEntry e = {};
e.binding = 4;
e.sampler = default_sampler_;
bg_entries.push_back(e);
}
{
WGPUBindGroupEntry e = {};
e.binding = 5;
e.textureView = sky_texture_view_ ? sky_texture_view_ : noise_texture_view_;
bg_entries.push_back(e);
}
// Select the correct pipeline and bind group layout
WGPURenderPipeline current_pipeline =
bvh_enabled_ ? pipeline_ : pipeline_no_bvh_;
WGPUBindGroupLayout current_layout =
wgpuRenderPipelineGetBindGroupLayout(current_pipeline, 0);
WGPUBindGroupDescriptor bg_desc = {};
bg_desc.layout = current_layout;
bg_desc.entryCount = (uint32_t)bg_entries.size();
bg_desc.entries = bg_entries.data();
bind_group_ = wgpuDeviceCreateBindGroup(device_, &bg_desc);
wgpuBindGroupLayoutRelease(current_layout);
wgpuRenderPassEncoderSetPipeline(pass, current_pipeline);
wgpuRenderPassEncoderSetBindGroup(pass, 0, bind_group_, 0, nullptr);
uint32_t instance_count =
(uint32_t)std::min((size_t)kMaxObjects, scene.objects.size());
if (instance_count > 0) {
wgpuRenderPassEncoderSetPipeline(pass, current_pipeline);
wgpuRenderPassEncoderSetBindGroup(pass, 0, bind_group_, 0, nullptr);
wgpuRenderPassEncoderDraw(pass, 36, instance_count, 0, 0);
// Mesh pass
if (mesh_pipeline_) {
wgpuRenderPassEncoderSetPipeline(pass, mesh_pipeline_);
// Bind group is the same layout
wgpuRenderPassEncoderSetBindGroup(pass, 0, bind_group_, 0, nullptr);
for (uint32_t i = 0; i < instance_count; ++i) {
const auto& obj = scene.objects[i];
if (obj.type == ObjectType::MESH) {
const MeshGpuData* mesh = temp_mesh_override_
? temp_mesh_override_
: get_or_create_mesh(obj.mesh_asset_id);
if (mesh) {
wgpuRenderPassEncoderSetVertexBuffer(pass, 0, mesh->vertex_buffer,
0, WGPU_WHOLE_SIZE);
wgpuRenderPassEncoderSetIndexBuffer(pass, mesh->index_buffer,
WGPUIndexFormat_Uint32, 0,
WGPU_WHOLE_SIZE);
wgpuRenderPassEncoderDrawIndexed(pass, mesh->num_indices, 1, 0, 0,
i);
}
}
}
}
}
#if !defined(STRIP_ALL)
if (s_debug_enabled_) {
for (const auto& obj : scene.objects) {
vec3 extent = obj.local_extent;
if (obj.type == ObjectType::TORUS) {
extent = vec3(1.5f, 0.5f, 1.5f);
} else if (obj.type == ObjectType::MESH) {
MeshAsset mesh = GetMeshAsset(obj.mesh_asset_id);
if (mesh.num_indices > 0) {
visual_debug_.add_mesh_wireframe(
obj.get_model_matrix(), mesh.num_vertices, mesh.vertices,
mesh.num_indices, mesh.indices,
vec3(0.0f, 1.0f, 1.0f)); // Cyan wireframe
}
} else {
extent = vec3(1.0f, 1.0f, 1.0f);
}
if (obj.type != ObjectType::MESH) {
visual_debug_.add_box(obj.get_model_matrix(), extent,
vec3(1.0f, 1.0f, 0.0f)); // Yellow boxes
}
}
// Calculate ViewProj matrix for the debug renderer
mat4 view_proj = camera.get_projection_matrix() * camera.get_view_matrix();
visual_debug_.render(pass, view_proj);
}
#endif
}
|
