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///////////////////////////////////////////////////////////////////////////////////////////////////
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// Copyright 2021 Leszek Koltunski //
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// //
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// This file is part of Magic Cube. //
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// //
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// Magic Cube is free software: you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation, either version 2 of the License, or //
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// (at your option) any later version. //
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// //
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// Magic Cube 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 //
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// GNU General Public License for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with Magic Cube. If not, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////////////////////
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package org.distorted.objectlib.main;
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import org.distorted.library.effect.MatrixEffectScale;
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import org.distorted.library.main.DistortedEffects;
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import org.distorted.library.main.DistortedNode;
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import org.distorted.library.main.DistortedTexture;
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import org.distorted.library.mesh.MeshSquare;
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import org.distorted.library.type.Static3D;
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///////////////////////////////////////////////////////////////////////////////////////////////////
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public class TwistyObjectNode extends DistortedNode
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{
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private final Static3D mScale;
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private int mWidth, mHeight, mMin;
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private float mCameraDist;
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///////////////////////////////////////////////////////////////////////////////////////////////////
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public TwistyObjectNode(int surfaceW, int surfaceH)
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{
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super(new DistortedTexture(),new DistortedEffects(),new MeshSquare(20,20));
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mScale= new Static3D(1,1,1);
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setSize(surfaceW,surfaceH);
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MatrixEffectScale scaleEffect = new MatrixEffectScale(mScale);
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getEffects().apply(scaleEffect);
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getMesh().setComponentCenter(0,0,0,-0.1f);
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setFOV(60);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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void setSize(int surfaceW, int surfaceH)
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{
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mWidth = surfaceW;
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mHeight = surfaceH;
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mMin = Math.min(mWidth,mHeight);
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resizeFBO(mWidth,mHeight);
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mScale.set(surfaceW,surfaceH,surfaceW);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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float getCameraDist()
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{
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return mCameraDist;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// PUBLIC API
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// We assume that the FOV passed is for a square screen. Adjust it for the real dimensions.
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// if (w,h) are the real dimensions, then realFOV = 2*arctan( (h/w)*tan(FOV/2) )
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// --> mCameraDist = 0.5/tan(FOV/2)
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public void setFOV(float fov)
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{
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float aspect = ((float)mHeight)/mWidth;
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double halfFOV = fov * (Math.PI/360);
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float tanHalf = (float)Math.tan(halfFOV);
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double convertedFOV = 2*Math.atan(aspect*tanHalf);
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float convertedFOVinDeg = (float)((180/Math.PI)*convertedFOV);
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mCameraDist = 0.5f/tanHalf;
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setProjection( convertedFOVinDeg, 0.1f);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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public int getMinSize()
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{
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return mMin;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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public int getWidth()
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{
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return mWidth;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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public int getHeight()
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{
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return mHeight;
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}
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}
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