/src/main/java/org/distorted/library/effect/MatrixEffectShear.java - Annotate - Distorted Android

library / src / main / java / org / distorted / library / effect / MatrixEffectShear.java @ 1dec66e0

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	1dec66e0	Leszek Koltunski	import org.distorted.library.helpers.MatrixHelper;
24	6d62a900	Leszek Koltunski	import org.distorted.library.type.Data3D;
25
26	2014665f	leszek	///////////////////////////////////////////////////////////////////////////////////////////////////
27	faa3ff56	Leszek Koltunski	/**
28			* Shear the Mesh.
29			*/
30	2014665f	leszek	public class MatrixEffectShear extends MatrixEffect
31			{
32	78ff6ea9	Leszek Koltunski	private final Data3D mShear, mCenter;
33	0dd98279	Leszek Koltunski
34	2014665f	leszek	///////////////////////////////////////////////////////////////////////////////////////////////////
35	6bb59aad	Leszek Koltunski	/**
36	faa3ff56	Leszek Koltunski	* Only for use by the library itself.
37	6bb59aad	Leszek Koltunski	*
38	faa3ff56	Leszek Koltunski	* @y.exclude
39	6bb59aad	Leszek Koltunski	*/
40	15aa7d94	Leszek Koltunski	public boolean compute(float[] uniforms, int index, long currentDuration, long step )
41			{
42	e979d285	Leszek Koltunski	mCenter.get(uniforms,index+CENTER_OFFSET,currentDuration,step);
43	0dd98279	Leszek Koltunski	return mShear.get(uniforms,index,currentDuration,step);
44	2014665f	leszek	}
45	227b03bd	Leszek Koltunski
46			///////////////////////////////////////////////////////////////////////////////////////////////////
47	faa3ff56	Leszek Koltunski	/**
48			* Only for use by the library itself.
49	62c869ad	Leszek Koltunski	* <p>
50			* Here and in Shear we have the whole reason why there are two separate 'P' and 'V' (Point and
51			* Vector) matrices - Scale and Shear have to manipulate Points and Normal Vectors differently.
52	faa3ff56	Leszek Koltunski	*
53			* @y.exclude
54			*/
55	62c869ad	Leszek Koltunski	public void apply(float[] matrixP, float[] matrixV, float[] uniforms, int index)
56	227b03bd	Leszek Koltunski	{
57	96e3b88a	Leszek Koltunski	float sx = uniforms[NUM_FLOAT_UNIFORMS*index ];
58			float sy = uniforms[NUM_FLOAT_UNIFORMS*index+1];
59			float sz = uniforms[NUM_FLOAT_UNIFORMS*index+2];
60	227b03bd	Leszek Koltunski
61	96e3b88a	Leszek Koltunski	float x = uniforms[NUM_FLOAT_UNIFORMS*index+CENTER_OFFSET ];
62			float y = uniforms[NUM_FLOAT_UNIFORMS*index+CENTER_OFFSET+1];
63			float z = uniforms[NUM_FLOAT_UNIFORMS*index+CENTER_OFFSET+2];
64	227b03bd	Leszek Koltunski
65	1dec66e0	Leszek Koltunski	MatrixHelper.translate(matrixP, x, y, z);
66	227b03bd	Leszek Koltunski
67	62c869ad	Leszek Koltunski	matrixP[4] += sx*matrixP[0]; // Multiply viewMatrix by 1 x 0 0 , i.e. X-shear.
68			matrixP[5] += sx*matrixP[1]; // 0 1 0 0
69			matrixP[6] += sx*matrixP[2]; // 0 0 1 0
70			matrixP[7] += sx*matrixP[3]; // 0 0 0 1
71	227b03bd	Leszek Koltunski
72	62c869ad	Leszek Koltunski	matrixP[0] += sy*matrixP[4]; // Multiply viewMatrix by 1 0 0 0 , i.e. Y-shear.
73			matrixP[1] += sy*matrixP[5]; // y 1 0 0
74			matrixP[2] += sy*matrixP[6]; // 0 0 1 0
75			matrixP[3] += sy*matrixP[7]; // 0 0 0 1
76	227b03bd	Leszek Koltunski
77	62c869ad	Leszek Koltunski	matrixP[4] += sz*matrixP[8]; // Multiply viewMatrix by 1 0 0 0 , i.e. Z-shear.
78			matrixP[5] += sz*matrixP[9]; // 0 1 0 0
79			matrixP[6] += sz*matrixP[10];// 0 z 1 0
80			matrixP[7] += sz*matrixP[11];// 0 0 0 1
81	227b03bd	Leszek Koltunski
82	1dec66e0	Leszek Koltunski	MatrixHelper.translate(matrixP,-x,-y,-z);
83			MatrixHelper.translate(matrixV, x, y, z);
84	62c869ad	Leszek Koltunski
85			matrixV[0] -= sx*matrixV[4]; // Multiply viewMatrix by 1 0 0 0 , i.e. vector X-shear.
86			matrixV[1] -= sx*matrixV[5]; // -x 1 0 0
87			matrixV[2] -= sx*matrixV[6]; // 0 0 1 0
88			matrixV[3] -= sx*matrixV[7]; // 0 0 0 1
89
90			matrixV[4] -= sy*matrixV[0]; // Multiply viewMatrix by 1-y 0 0 , i.e. vector Y-shear.
91			matrixV[5] -= sy*matrixV[1]; // 0 1 0 0
92			matrixV[6] -= sy*matrixV[2]; // 0 0 1 0
93			matrixV[7] -= sy*matrixV[3]; // 0 0 0 1
94
95			matrixV[8] -= sz*matrixV[4]; // Multiply viewMatrix by 1 0 0 0 , i.e. vector Z-shear.
96			matrixV[9] -= sz*matrixV[5]; // 0 1-z 0
97			matrixV[10]-= sz*matrixV[6]; // 0 0 1 0
98			matrixV[11]-= sz*matrixV[7]; // 0 0 0 1
99
100	1dec66e0	Leszek Koltunski	MatrixHelper.translate(matrixV,-x,-y,-z);
101	227b03bd	Leszek Koltunski	}
102	faa3ff56	Leszek Koltunski
103			///////////////////////////////////////////////////////////////////////////////////////////////////
104			// PUBLIC API
105			///////////////////////////////////////////////////////////////////////////////////////////////////
106			/**
107			* Shear the Mesh.
108			*
109			* @param shear The 3-tuple of shear factors. The first controls level
110			* of shearing in the X-axis, second - Y-axis and the third -
111	2fef9669	Leszek Koltunski	* Z-axis. Each is the tangent of the shear angle, i.e 0 -
112	faa3ff56	Leszek Koltunski	* no shear, 1 - shear by 45 degrees (tan(45deg)=1) etc.
113			* @param center Center of shearing, i.e. the point which stays unmoved.
114			*/
115			public MatrixEffectShear(Data3D shear, Data3D center)
116			{
117			super(EffectName.SHEAR);
118			mShear = shear;
119			mCenter = center;
120			}
121	2014665f	leszek	}

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library / src / main / java / org / distorted / library / effect / MatrixEffectShear.java @ 1dec66e0