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
233
234
235
236
237
238
239
240
241
242
243
244
245
246
|
#[compute]
#version 450
#VERSION_DEFINES
layout(local_size_x = 64, local_size_y = 1, local_size_z = 1) in;
layout(set = 0, binding = 1, std430) buffer restrict writeonly DstVertexData {
uint data[];
}
dst_vertices;
layout(set = 0, binding = 2, std430) buffer restrict readonly BlendShapeWeights {
float data[];
}
blend_shape_weights;
layout(set = 1, binding = 0, std430) buffer restrict readonly SrcVertexData {
uint data[];
}
src_vertices;
layout(set = 1, binding = 1, std430) buffer restrict readonly BoneWeightData {
uint data[];
}
src_bone_weights;
layout(set = 1, binding = 2, std430) buffer restrict readonly BlendShapeData {
uint data[];
}
src_blend_shapes;
layout(set = 2, binding = 0, std430) buffer restrict readonly SkeletonData {
vec4 data[];
}
bone_transforms;
layout(push_constant, binding = 0, std430) uniform Params {
bool has_normal;
bool has_tangent;
bool has_skeleton;
bool has_blend_shape;
uint vertex_count;
uint vertex_stride;
uint skin_stride;
uint skin_weight_offset;
uint blend_shape_count;
bool normalized_blend_shapes;
uint pad0;
uint pad1;
}
params;
vec4 decode_abgr_2_10_10_10(uint base) {
uvec4 abgr_2_10_10_10 = (uvec4(base) >> uvec4(0, 10, 20, 30)) & uvec4(0x3FF, 0x3FF, 0x3FF, 0x3);
return vec4(abgr_2_10_10_10) / vec4(1023.0, 1023.0, 1023.0, 3.0) * 2.0 - 1.0;
}
uint encode_abgr_2_10_10_10(vec4 base) {
uvec4 abgr_2_10_10_10 = uvec4(clamp(ivec4((base * 0.5 + 0.5) * vec4(1023.0, 1023.0, 1023.0, 3.0)), ivec4(0), ivec4(0x3FF, 0x3FF, 0x3FF, 0x3))) << uvec4(0, 10, 20, 30);
return abgr_2_10_10_10.x | abgr_2_10_10_10.y | abgr_2_10_10_10.z | abgr_2_10_10_10.w;
}
void main() {
uint index = gl_GlobalInvocationID.x;
if (index >= params.vertex_count) {
return;
}
uint src_offset = index * params.vertex_stride;
#ifdef MODE_2D
vec2 vertex = uintBitsToFloat(uvec2(src_vertices.data[src_offset + 0], src_vertices.data[src_offset + 1]));
if (params.has_blend_shape) {
float blend_total = 0.0;
vec2 blend_vertex = vec2(0.0);
for (uint i = 0; i < params.blend_shape_count; i++) {
float w = blend_shape_weights.data[i];
if (abs(w) > 0.0001) {
uint base_offset = (params.vertex_count * i + index) * params.vertex_stride;
blend_vertex += uintBitsToFloat(uvec2(src_blend_shapes.data[base_offset + 0], src_blend_shapes.data[base_offset + 1])) * w;
base_offset += 2;
blend_total += w;
}
}
if (params.normalized_blend_shapes) {
vertex = (1.0 - blend_total) * vertex;
}
vertex += blend_vertex;
}
if (params.has_skeleton) {
uint skin_offset = params.skin_stride * index;
uvec2 bones = uvec2(src_bone_weights.data[skin_offset + 0], src_bone_weights.data[skin_offset + 1]);
uvec2 bones_01 = uvec2(bones.x & 0xFFFF, bones.x >> 16) * 3; //pre-add xform offset
uvec2 bones_23 = uvec2(bones.y & 0xFFFF, bones.y >> 16) * 3;
skin_offset += params.skin_weight_offset;
uvec2 weights = uvec2(src_bone_weights.data[skin_offset + 0], src_bone_weights.data[skin_offset + 1]);
vec2 weights_01 = unpackUnorm2x16(weights.x);
vec2 weights_23 = unpackUnorm2x16(weights.y);
mat4 m = mat4(bone_transforms.data[bones_01.x], bone_transforms.data[bones_01.x + 1], vec4(0.0, 0.0, 1.0, 0.0), vec4(0.0, 0.0, 0.0, 1.0)) * weights_01.x;
m += mat4(bone_transforms.data[bones_01.y], bone_transforms.data[bones_01.y + 1], vec4(0.0, 0.0, 1.0, 0.0), vec4(0.0, 0.0, 0.0, 1.0)) * weights_01.y;
m += mat4(bone_transforms.data[bones_23.x], bone_transforms.data[bones_23.x + 1], vec4(0.0, 0.0, 1.0, 0.0), vec4(0.0, 0.0, 0.0, 1.0)) * weights_23.x;
m += mat4(bone_transforms.data[bones_23.y], bone_transforms.data[bones_23.y + 1], vec4(0.0, 0.0, 1.0, 0.0), vec4(0.0, 0.0, 0.0, 1.0)) * weights_23.y;
//reverse order because its transposed
vertex = (vec4(vertex, 0.0, 1.0) * m).xy;
}
#else
vec3 vertex;
vec3 normal;
vec4 tangent;
vertex = uintBitsToFloat(uvec3(src_vertices.data[src_offset + 0], src_vertices.data[src_offset + 1], src_vertices.data[src_offset + 2]));
src_offset += 3;
if (params.has_normal) {
normal = decode_abgr_2_10_10_10(src_vertices.data[src_offset]).rgb;
src_offset++;
}
if (params.has_tangent) {
tangent = decode_abgr_2_10_10_10(src_vertices.data[src_offset]);
}
if (params.has_blend_shape) {
float blend_total = 0.0;
vec3 blend_vertex = vec3(0.0);
vec3 blend_normal = vec3(0.0);
vec3 blend_tangent = vec3(0.0);
for (uint i = 0; i < params.blend_shape_count; i++) {
float w = blend_shape_weights.data[i];
if (abs(w) > 0.0001) {
uint base_offset = (params.vertex_count * i + index) * params.vertex_stride;
blend_vertex += uintBitsToFloat(uvec3(src_blend_shapes.data[base_offset + 0], src_blend_shapes.data[base_offset + 1], src_blend_shapes.data[base_offset + 2])) * w;
base_offset += 3;
if (params.has_normal) {
blend_normal += decode_abgr_2_10_10_10(src_blend_shapes.data[base_offset]).rgb * w;
base_offset++;
}
if (params.has_tangent) {
blend_tangent += decode_abgr_2_10_10_10(src_blend_shapes.data[base_offset]).rgb;
}
blend_total += w;
}
}
if (params.normalized_blend_shapes) {
vertex = (1.0 - blend_total) * vertex;
normal = (1.0 - blend_total) * normal;
tangent.rgb = (1.0 - blend_total) * tangent.rgb;
}
vertex += blend_vertex;
normal += normalize(normal + blend_normal);
tangent.rgb += normalize(tangent.rgb + blend_tangent);
}
if (params.has_skeleton) {
uint skin_offset = params.skin_stride * index;
uvec2 bones = uvec2(src_bone_weights.data[skin_offset + 0], src_bone_weights.data[skin_offset + 1]);
uvec2 bones_01 = uvec2(bones.x & 0xFFFF, bones.x >> 16) * 3; //pre-add xform offset
uvec2 bones_23 = uvec2(bones.y & 0xFFFF, bones.y >> 16) * 3;
skin_offset += params.skin_weight_offset;
uvec2 weights = uvec2(src_bone_weights.data[skin_offset + 0], src_bone_weights.data[skin_offset + 1]);
vec2 weights_01 = unpackUnorm2x16(weights.x);
vec2 weights_23 = unpackUnorm2x16(weights.y);
mat4 m = mat4(bone_transforms.data[bones_01.x], bone_transforms.data[bones_01.x + 1], bone_transforms.data[bones_01.x + 2], vec4(0.0, 0.0, 0.0, 1.0)) * weights_01.x;
m += mat4(bone_transforms.data[bones_01.y], bone_transforms.data[bones_01.y + 1], bone_transforms.data[bones_01.y + 2], vec4(0.0, 0.0, 0.0, 1.0)) * weights_01.y;
m += mat4(bone_transforms.data[bones_23.x], bone_transforms.data[bones_23.x + 1], bone_transforms.data[bones_23.x + 2], vec4(0.0, 0.0, 0.0, 1.0)) * weights_23.x;
m += mat4(bone_transforms.data[bones_23.y], bone_transforms.data[bones_23.y + 1], bone_transforms.data[bones_23.y + 2], vec4(0.0, 0.0, 0.0, 1.0)) * weights_23.y;
if (params.skin_weight_offset == 4) {
//using 8 bones/weights
skin_offset = params.skin_stride * index + 2;
bones = uvec2(src_bone_weights.data[skin_offset + 0], src_bone_weights.data[skin_offset + 1]);
bones_01 = uvec2(bones.x & 0xFFFF, bones.x >> 16) * 3; //pre-add xform offset
bones_23 = uvec2(bones.y & 0xFFFF, bones.y >> 16) * 3;
skin_offset += params.skin_weight_offset;
weights = uvec2(src_bone_weights.data[skin_offset + 0], src_bone_weights.data[skin_offset + 1]);
weights_01 = unpackUnorm2x16(weights.x);
weights_23 = unpackUnorm2x16(weights.y);
m += mat4(bone_transforms.data[bones_01.x], bone_transforms.data[bones_01.x + 1], bone_transforms.data[bones_01.x + 2], vec4(0.0, 0.0, 0.0, 1.0)) * weights_01.x;
m += mat4(bone_transforms.data[bones_01.y], bone_transforms.data[bones_01.y + 1], bone_transforms.data[bones_01.y + 2], vec4(0.0, 0.0, 0.0, 1.0)) * weights_01.y;
m += mat4(bone_transforms.data[bones_23.x], bone_transforms.data[bones_23.x + 1], bone_transforms.data[bones_23.x + 2], vec4(0.0, 0.0, 0.0, 1.0)) * weights_23.x;
m += mat4(bone_transforms.data[bones_23.y], bone_transforms.data[bones_23.y + 1], bone_transforms.data[bones_23.y + 2], vec4(0.0, 0.0, 0.0, 1.0)) * weights_23.y;
}
//reverse order because its transposed
vertex = (vec4(vertex, 1.0) * m).xyz;
normal = normalize((vec4(normal, 0.0) * m).xyz);
tangent.xyz = normalize((vec4(tangent.xyz, 0.0) * m).xyz);
}
uint dst_offset = index * params.vertex_stride;
uvec3 uvertex = floatBitsToUint(vertex);
dst_vertices.data[dst_offset + 0] = uvertex.x;
dst_vertices.data[dst_offset + 1] = uvertex.y;
dst_vertices.data[dst_offset + 2] = uvertex.z;
dst_offset += 3;
if (params.has_normal) {
dst_vertices.data[dst_offset] = encode_abgr_2_10_10_10(vec4(normal, 0.0));
dst_offset++;
}
if (params.has_tangent) {
dst_vertices.data[dst_offset] = encode_abgr_2_10_10_10(tangent);
}
#endif
}
|