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///////////////////////////////////////////////////////////////////////////////////////////////////
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// Copyright 2017 Leszek Koltunski //
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// //
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// This file is part of Distorted. //
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// //
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// Distorted 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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// Distorted 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 Distorted. If not, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////////////////////
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package org.distorted.library.effect;
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import org.distorted.library.type.Static4D;
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import java.lang.reflect.Method;
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Abstract class that represents an Effect that works by injecting certain code into the main Vertex shader.
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*/
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public abstract class VertexEffect extends Effect
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{
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/**
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* 12: 5 per-effect interpolated values, 3-dimensional center, 4-dimensional Region
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*/
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public static final int NUM_UNIFORMS = 12;
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static final int VALUES_OFFSET = 0;
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static final int CENTER_OFFSET = 5;
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static final int REGION_OFFSET = 8;
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private static String mGLSL = "";
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private static int mNumEnabled = 0;
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private static String mFullGLSL = "";
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private static int mFullEnabled = 0;
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private static boolean mFullPrepared = false;
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final static Static4D MAX_REGION = new Static4D(0,0,0,1000000);
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///////////////////////////////////////////////////////////////////////////////////////////////////
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VertexEffect(EffectName name)
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{
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super(name);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private static String retSection(int effect, String code)
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{
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return
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"if( vName[i]=="+effect+" )\n" +
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"{\n" +
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code +"\n" +
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"}\n" +
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"else\n";
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// prepare the code to be injected into the Full program, i.e. code of ALL vertex effects.
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private static void prepareFull()
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{
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Method method;
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for(EffectName name: EffectName.values())
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{
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if( name.getType() == EffectType.VERTEX )
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{
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Class<? extends Effect> cls = name.getEffectClass();
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try
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{
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method = cls.getDeclaredMethod("code");
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}
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catch(NoSuchMethodException ex)
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{
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android.util.Log.e("Effect", "exception getting method: "+ex.getMessage());
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method = null;
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}
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try
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{
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if( method!=null )
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{
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Object value = method.invoke(null);
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String code = (String)value;
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mFullGLSL += retSection(name.ordinal(),code);
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mFullEnabled++;
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}
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}
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catch(Exception ex)
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{
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android.util.Log.e("Effect", "exception invoking method: "+ex.getMessage());
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}
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}
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}
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// prepare code to be injected into the 'main_vertex_shader' main() function.
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static void addEffect(EffectName name, String code)
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{
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int effect = name.ordinal();
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if( !mEnabled[effect] )
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{
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mEnabled[effect] = true;
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mNumEnabled ++;
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mGLSL += retSection(effect,code);
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}
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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 static String getGLSL()
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{
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return mGLSL + "{}";
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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 static String getAllGLSL()
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{
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if( !mFullPrepared )
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{
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prepareFull();
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mFullPrepared = true;
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}
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return mFullGLSL + "{}";
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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 static int getAllEnabled()
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{
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if( !mFullPrepared )
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{
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prepareFull();
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mFullPrepared = true;
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}
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return mFullEnabled;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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static void destroyStatics()
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{
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mNumEnabled = 0;
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mGLSL = "";
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mFullEnabled= 0;
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mFullGLSL = "";
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mFullPrepared = false;
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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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* Return the number of Vertex effects enabled.
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*/
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public static int getNumEnabled()
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{
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return mNumEnabled;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Set Mesh association.
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*
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* This creates an association between this Vertex Effect and a Component of a Mesh.
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* One can set the association of an Effect and of a Component, and the Effect will only be active on
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* vertices of Components such that
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*
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* (effect assoc) & (component assoc) != 0 || (effect component) == (mesh component)
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*
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* (see main_vertex_shader)
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*
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* The point: this way we can configure the system so that each Vertex Effect acts only on a certain
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* subset of a Mesh, thus potentially significantly reducing the number of render calls.
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*/
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public void setMeshAssociation(int component, int association)
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{
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mComponent = component;
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mAssociation = association;
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}
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}
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