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

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///////////////////////////////////////////////////////////////////////////////////////////////////
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// Copyright 2017 Leszek Koltunski  leszek@koltunski.pl                                          //
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//                                                                                               //
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// This file is part of Distorted.                                                               //
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//                                                                                               //
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// This library is free software; you can redistribute it and/or                                 //
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// modify it under the terms of the GNU Lesser General Public                                    //
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// License as published by the Free Software Foundation; either                                  //
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// version 2.1 of the License, or (at your option) any later version.                            //
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//                                                                                               //
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// This library is distributed in the hope that it will be useful,                               //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of                                //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU                             //
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// Lesser General Public License for more details.                                               //
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//                                                                                               //
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// You should have received a copy of the GNU Lesser General Public                              //
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// License along with this library; if not, write to the Free Software                           //
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA                //
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///////////////////////////////////////////////////////////////////////////////////////////////////
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package org.distorted.library.effect;
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import org.distorted.library.helpers.MatrixHelper;
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import org.distorted.library.type.Data1D;
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import org.distorted.library.type.Data3D;
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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 * Rotate the Mesh by 'angle' degrees around the center, along an axis.
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 */
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public class MatrixEffectRotate extends MatrixEffect
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  {
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  private final Data1D mAngle;
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  private final Data3D mAxis, mCenter;
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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 * Only for use by the library itself.
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 *
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 * @y.exclude
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 */
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  public boolean compute(float[] uniforms, int index, long currentDuration, long step )
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    {
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    mCenter.get(uniforms,index+CENTER_OFFSET,currentDuration,step);
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    mAxis.get(uniforms,index+1,currentDuration,step);
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    return mAngle.get(uniforms,index,currentDuration,step);
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    }
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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 * Only for use by the library itself.
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 *
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 * @y.exclude
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 */
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  public void apply(float[] matrixP, float[] matrixV, float[] uniforms, int index)
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    {
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    float angle = uniforms[NUM_FLOAT_UNIFORMS*index  ];
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    float axisX = uniforms[NUM_FLOAT_UNIFORMS*index+1];
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    float axisY = uniforms[NUM_FLOAT_UNIFORMS*index+2];
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    float axisZ = uniforms[NUM_FLOAT_UNIFORMS*index+3];
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    float x = uniforms[NUM_FLOAT_UNIFORMS*index+CENTER_OFFSET  ];
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    float y = uniforms[NUM_FLOAT_UNIFORMS*index+CENTER_OFFSET+1];
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    float z = uniforms[NUM_FLOAT_UNIFORMS*index+CENTER_OFFSET+2];
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    MatrixHelper.translate(matrixP, x, y, z);
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    MatrixHelper.rotate(matrixP, angle, axisX, axisY, axisZ);
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    MatrixHelper.translate(matrixP,-x,-y,-z);
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    MatrixHelper.translate(matrixV, x, y, z);
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    MatrixHelper.rotate(matrixV, angle, axisX, axisY, axisZ);
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    MatrixHelper.translate(matrixV,-x,-y,-z);
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    }
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// PUBLIC API
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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 * Rotate the Mesh by 'angle' degrees around the center, along an axis.
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 *
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 * @param angle  Angle that we want to rotate the Object to. Unit: degrees
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 * @param axis   Axis of rotation
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 * @param center Coordinates of the Point we are rotating around.
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 */
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  public MatrixEffectRotate(Data1D angle, Data3D axis, Data3D center)
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    {
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    super(EffectName.ROTATE);
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    mAngle = angle;
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    mAxis = axis;
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    mCenter = center;
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    }
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  }