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
|
// Copyright (C) 2023 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#version 440
layout(location = 0) in vec3 attr_pos;
layout(location=0) out vec3 v_nearPoint;
layout(location=1) out vec3 v_farPoint;
layout(location=2) out flat uint v_viewIndex;
layout(std140, binding=0) uniform buf {
#if QSHADER_VIEW_COUNT >= 2
mat4 viewProj[QSHADER_VIEW_COUNT];
mat4 invViewProj[QSHADER_VIEW_COUNT];
#else
mat4 viewProj;
mat4 invViewProj;
#endif
float near;
float far;
float scale;
float yFactor;
uint gridFlags;
} u_buf;
vec3 unprojectPoint(float x, float y, float z, mat4 invViewProj) {
vec4 unprojectedPoint = invViewProj * vec4(x, y, z, 1.0);
return unprojectedPoint.xyz/unprojectedPoint.w;
}
void main()
{
vec3 p = attr_pos;
#if QSHADER_VIEW_COUNT >= 2
v_nearPoint = unprojectPoint(p.x, u_buf.yFactor * p.y, 0.0, u_buf.invViewProj[gl_ViewIndex]).xyz;
v_farPoint = unprojectPoint(p.x, u_buf.yFactor * p.y, 1.0, u_buf.invViewProj[gl_ViewIndex]).xyz;
v_viewIndex = gl_ViewIndex;
#else
v_nearPoint = unprojectPoint(p.x, u_buf.yFactor * p.y, 0.0, u_buf.invViewProj).xyz;
v_farPoint = unprojectPoint(p.x, u_buf.yFactor * p.y, 1.0, u_buf.invViewProj).xyz;
v_viewIndex = 0;
#endif
gl_Position = vec4(p, 1.0);
}
|
