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///////////////////////////////////////////////////////////////////////////////////////////////////
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// Copyright 2016 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.mesh;
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import android.opengl.GLES31;
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import android.opengl.Matrix;
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import org.distorted.library.effect.MatrixEffect;
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import org.distorted.library.main.DistortedLibrary;
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import org.distorted.library.main.InternalBuffer;
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import org.distorted.library.program.DistortedProgram;
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import java.util.ArrayList;
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Abstract class which represents a Mesh, ie an array of vertices (rendered as a TRIANGLE_STRIP).
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* <p>
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* If you want to render to a particular shape, extend from here, construct a float array
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* containing per-vertex attributes, and call back setAttribs().
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*/
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public abstract class MeshBase
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{
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// sizes of attributes of an individual vertex.
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private static final int POS_DATA_SIZE= 3; // vertex coordinates: x,y,z
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private static final int NOR_DATA_SIZE= 3; // normal vector: x,y,z
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private static final int INF_DATA_SIZE= 3; // 'inflate' vector: x,y,z
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private static final int TEX_DATA_SIZE= 2; // texture coordinates: s,t
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static final int POS_ATTRIB = 0;
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static final int NOR_ATTRIB = POS_DATA_SIZE;
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static final int INF_ATTRIB = POS_DATA_SIZE + NOR_DATA_SIZE;
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static final int TEX_ATTRIB = POS_DATA_SIZE + NOR_DATA_SIZE + INF_DATA_SIZE;
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static final int VERT_ATTRIBS = POS_DATA_SIZE + NOR_DATA_SIZE + INF_DATA_SIZE + TEX_DATA_SIZE; // number of attributes of a 'normal' vertex
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static final int TRAN_ATTRIBS = POS_DATA_SIZE + POS_DATA_SIZE; // number of attributes of a transform feedback vertex
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private static final int BYTES_PER_FLOAT = 4;
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private static final int OFFSET_POS = POS_ATTRIB*BYTES_PER_FLOAT;
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private static final int OFFSET_NOR = NOR_ATTRIB*BYTES_PER_FLOAT;
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private static final int OFFSET_INF = INF_ATTRIB*BYTES_PER_FLOAT;
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private static final int OFFSET_TEX = TEX_ATTRIB*BYTES_PER_FLOAT;
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private static final int TRAN_SIZE = TRAN_ATTRIBS*BYTES_PER_FLOAT;
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private static final int VERT_SIZE = VERT_ATTRIBS*BYTES_PER_FLOAT;
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private boolean mShowNormals; // when rendering this mesh, draw normal vectors?
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private InternalBuffer mVBO, mTFO; // main vertex buffer and transform feedback buffer
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private int mNumVertices;
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private float[] mVertAttribs; // packed: PosX,PosY,PosZ, NorX,NorY,NorZ, InfX,InfY,InfZ, TexS,TexT
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private float mInflate;
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private float mBoundingX, mBoundingY, mBoundingZ;
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private float mStretchX, mStretchY, mStretchZ;
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private class Component
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{
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private int mEndIndex;
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private float[] mTextureMap;
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Component(int end)
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{
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mEndIndex = end;
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mTextureMap = new float[4];
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mTextureMap[0] = 0.0f; // LowerLeft_X
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mTextureMap[1] = 0.0f; // LowerLeft_Y
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mTextureMap[2] = 1.0f; // Width
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mTextureMap[3] = 1.0f; // Height
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}
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Component(Component original)
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{
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mEndIndex = original.mEndIndex;
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mTextureMap = new float[4];
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System.arraycopy(original.mTextureMap,0,mTextureMap,0,4);
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}
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void setMap(float[] newMap)
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{
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mTextureMap = newMap;
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}
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}
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private ArrayList<Component> mComponent;
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///////////////////////////////////////////////////////////////////////////////////////////////////
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MeshBase(float bx, float by, float bz)
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{
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mBoundingX = bx/2;
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mBoundingY = by/2;
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mBoundingZ = bz/2;
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mStretchX = 1.0f;
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mStretchY = 1.0f;
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mStretchZ = 1.0f;
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mShowNormals = false;
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mInflate = 0.0f;
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mComponent = new ArrayList<>();
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mVBO = new InternalBuffer(GLES31.GL_ARRAY_BUFFER , GLES31.GL_STATIC_READ);
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mTFO = new InternalBuffer(GLES31.GL_TRANSFORM_FEEDBACK_BUFFER, GLES31.GL_STATIC_READ);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// copy constructor
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MeshBase(MeshBase original)
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{
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mBoundingX = original.mBoundingX;
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mBoundingY = original.mBoundingY;
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mBoundingZ = original.mBoundingZ;
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mStretchX = original.mStretchX;
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mStretchY = original.mStretchY;
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mStretchZ = original.mStretchZ;
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mShowNormals = original.mShowNormals;
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mInflate = original.mInflate;
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int size = original.mComponent.size();
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mComponent = new ArrayList<>();
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for(int i=0; i<size; i++)
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{
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Component comp = new Component(original.mComponent.get(i));
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mComponent.add(comp);
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}
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mVBO = new InternalBuffer(GLES31.GL_ARRAY_BUFFER , GLES31.GL_STATIC_READ);
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mTFO = new InternalBuffer(GLES31.GL_TRANSFORM_FEEDBACK_BUFFER, GLES31.GL_STATIC_READ);
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System.arraycopy(original.mVertAttribs,0,mVertAttribs,0,original.mNumVertices*VERT_ATTRIBS);
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setAttribs(mVertAttribs);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// change mVertAttribs from index 'begin' to index 'end' (inclusive) to the new Texture Map.
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// x varies from -mBoundingX to +mBoundingX; y accordingly.
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private void changeTextureMap( float[] newMap, float[] oldMap, int begin, int end)
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{
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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int numComponents()
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{
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return mComponent.size();
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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void setBounding(float bx, float by, float bz)
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{
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mBoundingX = bx/2;
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mBoundingY = by/2;
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mBoundingZ = bz/2;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// when a derived class is done computing its mesh, it has to call this method.
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void setAttribs(float[] vertexAttribs)
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{
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mNumVertices = vertexAttribs.length/VERT_ATTRIBS;
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mVertAttribs = vertexAttribs;
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mComponent.add(new Component(mNumVertices));
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mVBO.invalidate();
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mTFO.invalidate();
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// called from MeshJoined
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void join(MeshBase[] meshes)
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{
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MeshBase mesh;
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Component comp;
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int com, num, len = meshes.length;
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int origVertices = mNumVertices;
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// compute new numVertices; take care of Components
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if( origVertices>0 )
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{
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com = mComponent.size();
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mNumVertices+= ( mNumVertices%2==1 ? 2:1 );
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mComponent.get(com-1).mEndIndex = mNumVertices;
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}
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for(int i=0; i<len; i++)
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{
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mesh = meshes[i];
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com = mesh.mComponent.size();
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for(int j=0; j<com; j++)
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{
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comp = new Component(mesh.mComponent.get(j));
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comp.mEndIndex += mNumVertices;
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mComponent.add(comp);
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}
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num = mesh.mNumVertices;
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if( mNumVertices==0 ) mNumVertices += (num%2==1 ? num+2 : num+1);
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else if( i==len-1 ) mNumVertices += (num+1);
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else mNumVertices += (num%2==1 ? num+3 : num+2);
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}
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// allocate new attrib array
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float[] newAttribs = new float[VERT_ATTRIBS*mNumVertices];
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num = origVertices;
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if( origVertices>0 )
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{
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System.arraycopy(mVertAttribs, 0, newAttribs, 0, VERT_ATTRIBS*num);
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System.arraycopy(mVertAttribs, VERT_ATTRIBS*(origVertices-1), newAttribs, VERT_ATTRIBS*origVertices, VERT_ATTRIBS );
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origVertices++;
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if( num%2==1 )
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{
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System.arraycopy(mVertAttribs, VERT_ATTRIBS*(origVertices-1), newAttribs, VERT_ATTRIBS*origVertices, VERT_ATTRIBS);
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origVertices++;
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}
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}
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for(int i=0; i<len; i++)
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{
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mesh = meshes[i];
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num = mesh.mNumVertices;
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if( origVertices>0 )
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{
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System.arraycopy(mesh.mVertAttribs, 0, newAttribs, VERT_ATTRIBS*origVertices, VERT_ATTRIBS );
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origVertices++;
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}
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System.arraycopy(mesh.mVertAttribs, 0, newAttribs, VERT_ATTRIBS*origVertices, VERT_ATTRIBS*num);
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origVertices+=num;
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if( i<len-1 )
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{
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System.arraycopy(mesh.mVertAttribs, VERT_ATTRIBS*(num-1), newAttribs, VERT_ATTRIBS*origVertices, VERT_ATTRIBS);
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origVertices++;
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if( num%2==1 )
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{
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System.arraycopy(mesh.mVertAttribs, VERT_ATTRIBS*(num-1), newAttribs, VERT_ATTRIBS*origVertices, VERT_ATTRIBS);
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origVertices++;
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}
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}
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}
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if( origVertices!=mNumVertices )
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{
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android.util.Log.e("mesh", "join: origVertices: "+origVertices+" numVertices: "+mNumVertices);
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}
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mVertAttribs = newAttribs;
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mVBO.invalidate();
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Not part of public API, do not document (public only because has to be used from the main package)
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*
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* @y.exclude
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*/
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public int getTFO()
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{
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return mTFO.mIndex[0];
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Not part of public API, do not document (public only because has to be used from the main package)
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*
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* @y.exclude
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*/
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public int getNumVertices()
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{
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return mNumVertices;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Not part of public API, do not document (public only because has to be used from the main package)
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*
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* @y.exclude
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*/
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public void bindVertexAttribs(DistortedProgram program)
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{
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mVBO.createImmediately(mNumVertices*VERT_SIZE, mVertAttribs);
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GLES31.glBindBuffer(GLES31.GL_ARRAY_BUFFER, mVBO.mIndex[0] );
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GLES31.glVertexAttribPointer(program.mAttribute[0], POS_DATA_SIZE, GLES31.GL_FLOAT, false, VERT_SIZE, OFFSET_POS);
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GLES31.glVertexAttribPointer(program.mAttribute[1], NOR_DATA_SIZE, GLES31.GL_FLOAT, false, VERT_SIZE, OFFSET_NOR);
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GLES31.glVertexAttribPointer(program.mAttribute[2], INF_DATA_SIZE, GLES31.GL_FLOAT, false, VERT_SIZE, OFFSET_INF);
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GLES31.glVertexAttribPointer(program.mAttribute[3], TEX_DATA_SIZE, GLES31.GL_FLOAT, false, VERT_SIZE, OFFSET_TEX);
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GLES31.glBindBuffer(GLES31.GL_ARRAY_BUFFER, 0);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Not part of public API, do not document (public only because has to be used from the main package)
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*
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* @y.exclude
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*/
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public void bindTransformAttribs(DistortedProgram program)
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{
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mTFO.createImmediately(mNumVertices*TRAN_SIZE, null);
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GLES31.glBindBuffer(GLES31.GL_ARRAY_BUFFER, mTFO.mIndex[0] );
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GLES31.glVertexAttribPointer(program.mAttribute[0], POS_DATA_SIZE, GLES31.GL_FLOAT, false, 0, 0);
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GLES31.glBindBuffer(GLES31.GL_ARRAY_BUFFER, 0);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Not part of public API, do not document (public only because has to be used from the main package)
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*
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* @y.exclude
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*/
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public void setInflate(float inflate)
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{
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mInflate = inflate;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Not part of public API, do not document (public only because has to be used from the main package)
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*
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* @y.exclude
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*/
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public float getInflate()
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{
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return mInflate;
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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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* When rendering this Mesh, do we want to render the Normal vectors as well?
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* <p>
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* Will work only on OpenGL ES >= 3.0 devices.
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*
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* @param show Controls if we render the Normal vectors or not.
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*/
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public void setShowNormals(boolean show)
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{
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mShowNormals = (DistortedLibrary.GLSL >= 300 && show);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* When rendering this mesh, should we also draw the normal vectors?
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*
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* @return <i>true</i> if we do render normal vectors
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*/
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public boolean getShowNormals()
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{
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return mShowNormals;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Release all internal resources.
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*/
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public void markForDeletion()
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{
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mVertAttribs = null;
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mVBO.markForDeletion();
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mTFO.markForDeletion();
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Apply all Effects to the vertex mesh. Overwrite the mesh in place.
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* <p>
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* This is a static, permanent modification of the vertices contained in this Mesh. If the effects
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* contain any Dynamics, they will be evaluated at 0.
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*
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* Please note that calling this once with the complete list of Effects will be much faster than
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* calling it repeatedly with one Effect at a time, as we have to reallocate the array of vertices
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* each time.
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*/
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public void apply(MatrixEffect[] effects)
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{
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float[][] matrix = new float[effects.length][16];
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float[] tmp;
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float[] array = new float[7];
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float x,y,z;
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int numEffects = 0;
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for(MatrixEffect eff: effects)
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{
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if( eff!=null )
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{
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Matrix.setIdentityM(matrix[numEffects],0);
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eff.compute(array,0,0,0);
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eff.apply(matrix[numEffects], array, 0);
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numEffects++;
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}
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}
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for(int index=0; index<mNumVertices*VERT_ATTRIBS; index+=VERT_ATTRIBS )
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{
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for(int mat=0; mat<numEffects; mat++)
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{
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tmp = matrix[mat];
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x = mVertAttribs[index+POS_ATTRIB ];
|
434
|
y = mVertAttribs[index+POS_ATTRIB+1];
|
435
|
z = mVertAttribs[index+POS_ATTRIB+2];
|
436
|
|
437
|
mVertAttribs[index+POS_ATTRIB ] = tmp[0]*x + tmp[4]*y + tmp[ 8]*z + tmp[12];
|
438
|
mVertAttribs[index+POS_ATTRIB+1] = tmp[1]*x + tmp[5]*y + tmp[ 9]*z + tmp[13];
|
439
|
mVertAttribs[index+POS_ATTRIB+2] = tmp[2]*x + tmp[6]*y + tmp[10]*z + tmp[14];
|
440
|
|
441
|
x = mVertAttribs[index+NOR_ATTRIB ];
|
442
|
y = mVertAttribs[index+NOR_ATTRIB+1];
|
443
|
z = mVertAttribs[index+NOR_ATTRIB+2];
|
444
|
|
445
|
mVertAttribs[index+NOR_ATTRIB ] = tmp[0]*x + tmp[4]*y + tmp[ 8]*z;
|
446
|
mVertAttribs[index+NOR_ATTRIB+1] = tmp[1]*x + tmp[5]*y + tmp[ 9]*z;
|
447
|
mVertAttribs[index+NOR_ATTRIB+2] = tmp[2]*x + tmp[6]*y + tmp[10]*z;
|
448
|
|
449
|
x = mVertAttribs[index+INF_ATTRIB ];
|
450
|
y = mVertAttribs[index+INF_ATTRIB+1];
|
451
|
z = mVertAttribs[index+INF_ATTRIB+2];
|
452
|
|
453
|
mVertAttribs[index+INF_ATTRIB ] = tmp[0]*x + tmp[4]*y + tmp[ 8]*z;
|
454
|
mVertAttribs[index+INF_ATTRIB+1] = tmp[1]*x + tmp[5]*y + tmp[ 9]*z;
|
455
|
mVertAttribs[index+INF_ATTRIB+2] = tmp[2]*x + tmp[6]*y + tmp[10]*z;
|
456
|
}
|
457
|
}
|
458
|
|
459
|
mTFO.invalidate();
|
460
|
}
|
461
|
|
462
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
463
|
/**
|
464
|
* Sets texture maps for all components of this mesh.
|
465
|
* <p>
|
466
|
* Please note that calling this once with the complete list of Maps will be much faster than
|
467
|
* calling it repeatedly with one Maps at a time, as we have to reallocate the array of vertices
|
468
|
* each time.
|
469
|
* 'maps' needs to be maps[NumComponentsInThisMesh][4]. [0] is the lower-left corner's X, [1]- its Y,
|
470
|
* [2] - width, [3] - height of the map.
|
471
|
* For example map[0] = new float { 0.0, 0.5, 0.5, 0.5 } sets the 0th component texture map to the
|
472
|
* upper-left quadrant of the texture.
|
473
|
*/
|
474
|
public void setTextureMap(float[][] maps)
|
475
|
{
|
476
|
int num_comp = mComponent.size();
|
477
|
int num_maps = maps.length;
|
478
|
int min = num_comp<num_maps ? num_comp : num_maps;
|
479
|
int lastEnd = 0;
|
480
|
|
481
|
for(int i=0; i<min; i++)
|
482
|
{
|
483
|
if( maps[i]!=null )
|
484
|
{
|
485
|
Component comp = mComponent.get(i);
|
486
|
changeTextureMap(maps[i],comp.mTextureMap,lastEnd,comp.mEndIndex);
|
487
|
comp.setMap(maps[i]);
|
488
|
lastEnd = comp.mEndIndex;
|
489
|
}
|
490
|
}
|
491
|
|
492
|
mTFO.invalidate();
|
493
|
}
|
494
|
|
495
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
496
|
/**
|
497
|
* Each mesh has its 'bounding box' - return half of its X-length.
|
498
|
* <p>
|
499
|
* In case of all 'simple' Meshes, the bounding box is always 1x1x1 (Sphere, Cubes) or 1x1x0
|
500
|
* (Rectangles, Triangles, Quad - i.e. all 'flat' Meshes). But this can be something else in case of
|
501
|
* MeshComponent.
|
502
|
*/
|
503
|
public float getBoundingX()
|
504
|
{
|
505
|
return mBoundingX*mStretchX;
|
506
|
}
|
507
|
|
508
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
509
|
/**
|
510
|
* Each mesh has its 'bounding box' - return half of its Y-length.
|
511
|
*/
|
512
|
public float getBoundingY()
|
513
|
{
|
514
|
return mBoundingY*mStretchY;
|
515
|
}
|
516
|
|
517
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
518
|
/**
|
519
|
* Each mesh has its 'bounding box' - return half of its Z-length.
|
520
|
*/
|
521
|
public float getBoundingZ()
|
522
|
{
|
523
|
return mBoundingZ*mStretchZ;
|
524
|
}
|
525
|
|
526
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
527
|
/**
|
528
|
* Sometimes we want to display a Mesh on a rectangular screen. Then we need to stretch it by
|
529
|
* different factors in x and y (or z) directions. If we also wanted do display some vertex effects
|
530
|
* done on this mesh, let's say a bulge done by a Distort effect, and wanted the bulge to be round,
|
531
|
* (i.e the same in x and y directions) then doing so without this method would be impossible.
|
532
|
*
|
533
|
* This sets 'stretch' factors in each 3 dimensions. All vertices of this Mesh will be premultiplied
|
534
|
* by those factors in the very first line of the Vertex Shader, before any Effects are done on it.
|
535
|
* Using this we can thus pre-stretch the mesh to aspect ratio equal to the surface we eventually
|
536
|
* want to display the Mesh on, and this way we can achieve a round Distort bulge!
|
537
|
*
|
538
|
* This could also be used to pre-stretch a Rectangles Mesh to a size equal (in pixels) to the bitmap
|
539
|
* this mesh is textured with - and this lets us work with all Effects in natural, pixel units.
|
540
|
*
|
541
|
* @param sx stretch factor in x.
|
542
|
* @param sy stretch factor in y.
|
543
|
* @param sz stretch factor in z.
|
544
|
*/
|
545
|
public void setStretch(float sx, float sy, float sz)
|
546
|
{
|
547
|
mStretchX = sx;
|
548
|
mStretchY = sy;
|
549
|
mStretchZ = sz;
|
550
|
}
|
551
|
|
552
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
553
|
/**
|
554
|
* Returns the x-factor set by setStretch().
|
555
|
*/
|
556
|
public float getStretchX()
|
557
|
{
|
558
|
return mStretchX;
|
559
|
}
|
560
|
|
561
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
562
|
/**
|
563
|
* Returns the y-factor set by setStretch().
|
564
|
*/
|
565
|
public float getStretchY()
|
566
|
{
|
567
|
return mStretchY;
|
568
|
}
|
569
|
|
570
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
571
|
/**
|
572
|
* Returns the z-factor set by setStretch().
|
573
|
*/
|
574
|
public float getStretchZ()
|
575
|
{
|
576
|
return mStretchZ;
|
577
|
}
|
578
|
}
|
579
|
|
580
|
|
581
|
|