|
1
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
2
|
// Copyright 2020 Leszek Koltunski //
|
|
3
|
// //
|
|
4
|
// This file is part of Distorted. //
|
|
5
|
// //
|
|
6
|
// Distorted is free software: you can redistribute it and/or modify //
|
|
7
|
// it under the terms of the GNU General Public License as published by //
|
|
8
|
// the Free Software Foundation, either version 2 of the License, or //
|
|
9
|
// (at your option) any later version. //
|
|
10
|
// //
|
|
11
|
// Distorted is distributed in the hope that it will be useful, //
|
|
12
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of //
|
|
13
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
|
|
14
|
// GNU General Public License for more details. //
|
|
15
|
// //
|
|
16
|
// You should have received a copy of the GNU General Public License //
|
|
17
|
// along with Distorted. If not, see <http://www.gnu.org/licenses/>. //
|
|
18
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
19
|
|
|
20
|
package org.distorted.library.effect;
|
|
21
|
|
|
22
|
import org.distorted.library.type.Data3D;
|
|
23
|
import org.distorted.library.type.Data4D;
|
|
24
|
|
|
25
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
26
|
|
|
27
|
/**
|
|
28
|
* Deform the Mesh by applying a 3D vector of force.
|
|
29
|
*/
|
|
30
|
public class VertexEffectQuaternion extends VertexEffect
|
|
31
|
{
|
|
32
|
private static final EffectName NAME = EffectName.VERTEX_QUATERNION;
|
|
33
|
|
|
34
|
private Data4D mQuaternion;
|
|
35
|
private Data3D mCenter;
|
|
36
|
|
|
37
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
38
|
/**
|
|
39
|
* Only for use by the library itself.
|
|
40
|
*
|
|
41
|
* @y.exclude
|
|
42
|
*/
|
|
43
|
public boolean compute(float[] uniforms, int index, long currentDuration, long step )
|
|
44
|
{
|
|
45
|
mCenter.get(uniforms,index+CENTER_OFFSET,currentDuration,step);
|
|
46
|
return mQuaternion.get(uniforms,index+VALUES_OFFSET,currentDuration,step);
|
|
47
|
}
|
|
48
|
|
|
49
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
50
|
|
|
51
|
static String code()
|
|
52
|
{
|
|
53
|
return
|
|
54
|
|
|
55
|
"float qx = vUniforms[effect].x; \n"
|
|
56
|
+ "float qy = vUniforms[effect].y; \n"
|
|
57
|
+ "float qz = vUniforms[effect].z; \n"
|
|
58
|
+ "float qw = vUniforms[effect].w; \n"
|
|
59
|
+ "vec3 center = vUniforms[effect+1].yzw; \n"
|
|
60
|
|
|
61
|
+ "v -= center; \n"
|
|
62
|
|
|
63
|
+ "float tx = qx - v.z*qy + v.y*qz + v.x*qw; \n"
|
|
64
|
+ "float ty = qy + v.z*qx + v.y*qw - v.x*qz; \n"
|
|
65
|
+ "float tz = qz + v.z*qw - v.y*qx + v.x*qy; \n"
|
|
66
|
+ "float tw = qw - v.z*qz - v.y*qy - v.x*qx; \n"
|
|
67
|
|
|
68
|
+ "v.x = qw*tx + qz*ty - qy*tz - qx*tw; \n"
|
|
69
|
+ "v.y = qw*ty - qz*tx - qy*tw + qx*tz; \n"
|
|
70
|
+ "v.z = qw*tz - qz*tw + qy*tx - qx*ty; \n"
|
|
71
|
|
|
72
|
+ "v += center; \n"
|
|
73
|
|
|
74
|
+ "float nx = - n.z*qy + n.y*qz + n.x*qw; \n"
|
|
75
|
+ "float ny = + n.z*qx + n.y*qw - n.x*qz; \n"
|
|
76
|
+ "float nz = + n.z*qw - n.y*qx + n.x*qy; \n"
|
|
77
|
+ "float nw = - n.z*qz - n.y*qy - n.x*qx; \n"
|
|
78
|
|
|
79
|
+ "n.x = qw*nx + qz*ny - qy*nz - qx*nw; \n"
|
|
80
|
+ "n.y = qw*ny - qz*nx - qy*nw + qx*nz; \n"
|
|
81
|
+ "n.z = qw*nz - qz*nw + qy*nx - qx*ny; \n"
|
|
82
|
|
|
83
|
+ "#ifdef PREAPPLY \n"
|
|
84
|
|
|
85
|
+ "float ix = - inf.z*qy + inf.y*qz + inf.x*qw; \n"
|
|
86
|
+ "float iy = + inf.z*qx + inf.y*qw - inf.x*qz; \n"
|
|
87
|
+ "float iz = + inf.z*qw - inf.y*qx + inf.x*qy; \n"
|
|
88
|
+ "float iw = - inf.z*qz - inf.y*qy - inf.x*qx; \n"
|
|
89
|
|
|
90
|
+ "inf.x = qw*ix + qz*iy - qy*iz - qx*iw; \n"
|
|
91
|
+ "inf.y = qw*iy - qz*ix - qy*iw + qx*iz; \n"
|
|
92
|
+ "inf.z = qw*iz - qz*iw + qy*ix - qx*iy; \n"
|
|
93
|
|
|
94
|
+ "#endif \n";
|
|
95
|
}
|
|
96
|
|
|
97
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
98
|
// PUBLIC API
|
|
99
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
100
|
/**
|
|
101
|
* Have to call this before the shaders get compiled (i.e before DistortedLibrary.onCreate()) for the Effect to work.
|
|
102
|
*/
|
|
103
|
public static void enable()
|
|
104
|
{
|
|
105
|
addEffect( NAME, code() );
|
|
106
|
}
|
|
107
|
|
|
108
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
109
|
/**
|
|
110
|
* Rotate the Mesh by a (possibly changing in time) quaternion.
|
|
111
|
*
|
|
112
|
* @param quaternion Quaternion describing the rotation.
|
|
113
|
* @param center Coordinates of the Point we are rotating around.
|
|
114
|
*/
|
|
115
|
public VertexEffectQuaternion(Data4D quaternion, Data3D center )
|
|
116
|
{
|
|
117
|
super(NAME);
|
|
118
|
mQuaternion = quaternion;
|
|
119
|
mCenter = center;
|
|
120
|
}
|
|
121
|
}
|