1 |
2014665f
|
leszek
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
2 |
cc62b34a
|
Leszek Koltunski
|
// Copyright 2017 Leszek Koltunski leszek@koltunski.pl //
|
3 |
2014665f
|
leszek
|
// //
|
4 |
46b572b5
|
Leszek Koltunski
|
// This file is part of Distorted. //
|
5 |
2014665f
|
leszek
|
// //
|
6 |
cc62b34a
|
Leszek Koltunski
|
// This library is free software; you can redistribute it and/or //
|
7 |
|
|
// modify it under the terms of the GNU Lesser General Public //
|
8 |
|
|
// License as published by the Free Software Foundation; either //
|
9 |
|
|
// version 2.1 of the License, or (at your option) any later version. //
|
10 |
2014665f
|
leszek
|
// //
|
11 |
cc62b34a
|
Leszek Koltunski
|
// This library is distributed in the hope that it will be useful, //
|
12 |
2014665f
|
leszek
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of //
|
13 |
cc62b34a
|
Leszek Koltunski
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU //
|
14 |
|
|
// Lesser General Public License for more details. //
|
15 |
2014665f
|
leszek
|
// //
|
16 |
cc62b34a
|
Leszek Koltunski
|
// You should have received a copy of the GNU Lesser General Public //
|
17 |
|
|
// License along with this library; if not, write to the Free Software //
|
18 |
|
|
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA //
|
19 |
2014665f
|
leszek
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
20 |
|
|
|
21 |
|
|
package org.distorted.library.effect;
|
22 |
|
|
|
23 |
227b03bd
|
Leszek Koltunski
|
import android.opengl.Matrix;
|
24 |
|
|
|
25 |
6d62a900
|
Leszek Koltunski
|
import org.distorted.library.type.Data3D;
|
26 |
|
|
|
27 |
2014665f
|
leszek
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
28 |
faa3ff56
|
Leszek Koltunski
|
/**
|
29 |
|
|
* Shear the Mesh.
|
30 |
|
|
*/
|
31 |
2014665f
|
leszek
|
public class MatrixEffectShear extends MatrixEffect
|
32 |
|
|
{
|
33 |
78ff6ea9
|
Leszek Koltunski
|
private final Data3D mShear, mCenter;
|
34 |
0dd98279
|
Leszek Koltunski
|
|
35 |
2014665f
|
leszek
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
36 |
6bb59aad
|
Leszek Koltunski
|
/**
|
37 |
faa3ff56
|
Leszek Koltunski
|
* Only for use by the library itself.
|
38 |
6bb59aad
|
Leszek Koltunski
|
*
|
39 |
faa3ff56
|
Leszek Koltunski
|
* @y.exclude
|
40 |
6bb59aad
|
Leszek Koltunski
|
*/
|
41 |
15aa7d94
|
Leszek Koltunski
|
public boolean compute(float[] uniforms, int index, long currentDuration, long step )
|
42 |
|
|
{
|
43 |
e979d285
|
Leszek Koltunski
|
mCenter.get(uniforms,index+CENTER_OFFSET,currentDuration,step);
|
44 |
0dd98279
|
Leszek Koltunski
|
return mShear.get(uniforms,index,currentDuration,step);
|
45 |
2014665f
|
leszek
|
}
|
46 |
227b03bd
|
Leszek Koltunski
|
|
47 |
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
48 |
faa3ff56
|
Leszek Koltunski
|
/**
|
49 |
|
|
* Only for use by the library itself.
|
50 |
62c869ad
|
Leszek Koltunski
|
* <p>
|
51 |
|
|
* Here and in Shear we have the whole reason why there are two separate 'P' and 'V' (Point and
|
52 |
|
|
* Vector) matrices - Scale and Shear have to manipulate Points and Normal Vectors differently.
|
53 |
faa3ff56
|
Leszek Koltunski
|
*
|
54 |
|
|
* @y.exclude
|
55 |
|
|
*/
|
56 |
62c869ad
|
Leszek Koltunski
|
public void apply(float[] matrixP, float[] matrixV, float[] uniforms, int index)
|
57 |
227b03bd
|
Leszek Koltunski
|
{
|
58 |
96e3b88a
|
Leszek Koltunski
|
float sx = uniforms[NUM_FLOAT_UNIFORMS*index ];
|
59 |
|
|
float sy = uniforms[NUM_FLOAT_UNIFORMS*index+1];
|
60 |
|
|
float sz = uniforms[NUM_FLOAT_UNIFORMS*index+2];
|
61 |
227b03bd
|
Leszek Koltunski
|
|
62 |
96e3b88a
|
Leszek Koltunski
|
float x = uniforms[NUM_FLOAT_UNIFORMS*index+CENTER_OFFSET ];
|
63 |
|
|
float y = uniforms[NUM_FLOAT_UNIFORMS*index+CENTER_OFFSET+1];
|
64 |
|
|
float z = uniforms[NUM_FLOAT_UNIFORMS*index+CENTER_OFFSET+2];
|
65 |
227b03bd
|
Leszek Koltunski
|
|
66 |
62c869ad
|
Leszek Koltunski
|
Matrix.translateM(matrixP, 0, x, y, z);
|
67 |
227b03bd
|
Leszek Koltunski
|
|
68 |
62c869ad
|
Leszek Koltunski
|
matrixP[4] += sx*matrixP[0]; // Multiply viewMatrix by 1 x 0 0 , i.e. X-shear.
|
69 |
|
|
matrixP[5] += sx*matrixP[1]; // 0 1 0 0
|
70 |
|
|
matrixP[6] += sx*matrixP[2]; // 0 0 1 0
|
71 |
|
|
matrixP[7] += sx*matrixP[3]; // 0 0 0 1
|
72 |
227b03bd
|
Leszek Koltunski
|
|
73 |
62c869ad
|
Leszek Koltunski
|
matrixP[0] += sy*matrixP[4]; // Multiply viewMatrix by 1 0 0 0 , i.e. Y-shear.
|
74 |
|
|
matrixP[1] += sy*matrixP[5]; // y 1 0 0
|
75 |
|
|
matrixP[2] += sy*matrixP[6]; // 0 0 1 0
|
76 |
|
|
matrixP[3] += sy*matrixP[7]; // 0 0 0 1
|
77 |
227b03bd
|
Leszek Koltunski
|
|
78 |
62c869ad
|
Leszek Koltunski
|
matrixP[4] += sz*matrixP[8]; // Multiply viewMatrix by 1 0 0 0 , i.e. Z-shear.
|
79 |
|
|
matrixP[5] += sz*matrixP[9]; // 0 1 0 0
|
80 |
|
|
matrixP[6] += sz*matrixP[10];// 0 z 1 0
|
81 |
|
|
matrixP[7] += sz*matrixP[11];// 0 0 0 1
|
82 |
227b03bd
|
Leszek Koltunski
|
|
83 |
62c869ad
|
Leszek Koltunski
|
Matrix.translateM(matrixP, 0,-x,-y,-z);
|
84 |
|
|
|
85 |
|
|
Matrix.translateM(matrixV, 0, x, y, z);
|
86 |
|
|
|
87 |
|
|
matrixV[0] -= sx*matrixV[4]; // Multiply viewMatrix by 1 0 0 0 , i.e. vector X-shear.
|
88 |
|
|
matrixV[1] -= sx*matrixV[5]; // -x 1 0 0
|
89 |
|
|
matrixV[2] -= sx*matrixV[6]; // 0 0 1 0
|
90 |
|
|
matrixV[3] -= sx*matrixV[7]; // 0 0 0 1
|
91 |
|
|
|
92 |
|
|
matrixV[4] -= sy*matrixV[0]; // Multiply viewMatrix by 1-y 0 0 , i.e. vector Y-shear.
|
93 |
|
|
matrixV[5] -= sy*matrixV[1]; // 0 1 0 0
|
94 |
|
|
matrixV[6] -= sy*matrixV[2]; // 0 0 1 0
|
95 |
|
|
matrixV[7] -= sy*matrixV[3]; // 0 0 0 1
|
96 |
|
|
|
97 |
|
|
matrixV[8] -= sz*matrixV[4]; // Multiply viewMatrix by 1 0 0 0 , i.e. vector Z-shear.
|
98 |
|
|
matrixV[9] -= sz*matrixV[5]; // 0 1-z 0
|
99 |
|
|
matrixV[10]-= sz*matrixV[6]; // 0 0 1 0
|
100 |
|
|
matrixV[11]-= sz*matrixV[7]; // 0 0 0 1
|
101 |
|
|
|
102 |
|
|
Matrix.translateM(matrixV, 0,-x,-y,-z);
|
103 |
227b03bd
|
Leszek Koltunski
|
}
|
104 |
faa3ff56
|
Leszek Koltunski
|
|
105 |
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
106 |
|
|
// PUBLIC API
|
107 |
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
108 |
|
|
/**
|
109 |
|
|
* Shear the Mesh.
|
110 |
|
|
*
|
111 |
|
|
* @param shear The 3-tuple of shear factors. The first controls level
|
112 |
|
|
* of shearing in the X-axis, second - Y-axis and the third -
|
113 |
2fef9669
|
Leszek Koltunski
|
* Z-axis. Each is the tangent of the shear angle, i.e 0 -
|
114 |
faa3ff56
|
Leszek Koltunski
|
* no shear, 1 - shear by 45 degrees (tan(45deg)=1) etc.
|
115 |
|
|
* @param center Center of shearing, i.e. the point which stays unmoved.
|
116 |
|
|
*/
|
117 |
|
|
public MatrixEffectShear(Data3D shear, Data3D center)
|
118 |
|
|
{
|
119 |
|
|
super(EffectName.SHEAR);
|
120 |
|
|
mShear = shear;
|
121 |
|
|
mCenter = center;
|
122 |
|
|
}
|
123 |
2014665f
|
leszek
|
}
|