blob: d4c0f2b2a89d67e59a6841f1aa6b57f6222e4050 (
plain)
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
|
// Copyright (C) 2023 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
// boneTransform for even indices and boneNormalTransform for odd indices
mat4 qt_getTexMatrix(int index)
{
mat4 ret;
int width = textureSize(qt_boneTexture, 0).x;
int matId = index * 4;
ivec2 p;
// Rounding mode of integers is undefined for GLES 3.0
// https://www.khronos.org/registry/OpenGL/specs/es/3.0/GLSL_ES_Specification_3.00.pdf (section 12.33)
p.x = matId % width;
p.y = (matId - p.x) / width;
ret[0] = texelFetch(qt_boneTexture, p, 0);
p.x = (matId + 1) % width;
p.y = (matId + 1 - p.x) / width;
ret[1] = texelFetch(qt_boneTexture, p, 0);
p.x = (matId + 2) % width;
p.y = (matId + 2 - p.x) / width;
ret[2] = texelFetch(qt_boneTexture, p, 0);
p.x = (matId + 3) % width;
p.y = (matId + 3 - p.x) / width;
ret[3] = texelFetch(qt_boneTexture, p, 0);
return ret;
}
mat4 qt_getSkinMatrix(ivec4 joints, vec4 weights)
{
return qt_getTexMatrix(joints.x * 2) * weights.x
+ qt_getTexMatrix(joints.y * 2) * weights.y
+ qt_getTexMatrix(joints.z * 2) * weights.z
+ qt_getTexMatrix(joints.w * 2) * weights.w;
}
mat3 qt_getSkinNormalMatrix(ivec4 joints, vec4 weights)
{
return mat3(qt_getTexMatrix(joints.x * 2 + 1)) * weights.x
+ mat3(qt_getTexMatrix(joints.y * 2 + 1)) * weights.y
+ mat3(qt_getTexMatrix(joints.z * 2 + 1)) * weights.z
+ mat3(qt_getTexMatrix(joints.w * 2 + 1)) * weights.w;
}
|
