/src/main/java/org/distorted/library/mesh/MeshPolygon.java - Diff - Distorted Android

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Revision d3287c14

Added by Leszek Koltunski 11 months ago

ID d3287c14ac1ba19093aa92e9bde0587a886106bc
Parent 724f67ee
Child b1bfcdc7

MeshPolygon: support for an arbitrary subset of edges being 'up' (i.e. buildup to MeshMultigon)

      */
     public class MeshPolygon extends MeshBase
+      {
       private static final float NOT_DONE_YET = -1000;
       private static final int NUM_CACHE = 20;
       private static final int SHAPE_DD = 0;
       private static final int SHAPE_DU = 1;
       private static final int SHAPE_UD = 2;
-...
       private int numVertices;
       private int extraIndex, extraVertices;
       private float[] mBandQuot;
       private float[] mCurveCache;
     ///////////////////////////////////////////////////////////////////////////////////////////////////
     // polygonVertices>=3 , polygonBands>=2
-...
       private void computeCache()
+        {
         mBandQuot = new float[mNumPolygonBands];
         mCurveCache = new float[NUM_CACHE];
         float[] tmpD = new float[mNumPolygonBands+1];
         float[] tmpX = new float[mNumPolygonBands+1];
         int next, prev;
         for(int i=1; i<mNumPolygonBands; i++)
+          {
           tmpD[i] = (mPolygonBands[2*i-1]-mPolygonBands[2*i+1]) / (mPolygonBands[2*i]-mPolygonBands[2*i-2]);
           tmpX[i] = 1.0f - (mPolygonBands[2*i]+mPolygonBands[2*i-2])/2;
+          }
         tmpD[0] = tmpD[1];
         tmpD[mNumPolygonBands] = tmpD[mNumPolygonBands-1];
         tmpX[0] = 0.0f;
         tmpX[mNumPolygonBands] = 1.0f;
         for(int band=0; band<mNumPolygonBands; band++)
         int prev = 0;
         int next = 0;
         for(int i=0; i<NUM_CACHE-1; i++)
+          {
           next = (band==mNumPolygonBands-1 ? band : band+1);
           prev = (band==                 0 ? band : band-1);
           float x = i/(NUM_CACHE-1.0f);
           mBandQuot[band] = (mPolygonBands[2*prev+1]-mPolygonBands[2*next+1]) / (mPolygonBands[2*next]-mPolygonBands[2*prev]);
           if( x>=tmpX[next] )
+            {
             prev = next;
             while( next<=mNumPolygonBands && x>=tmpX[next] ) next++;
+            }
           if( next>prev )
+            {
             float t = (x-tmpX[prev]) / (tmpX[next]-tmpX[prev]);
             mCurveCache[i] = t*(tmpD[next]-tmpD[prev]) + tmpD[prev];
+            }
           else
+            {
             mCurveCache[i] = tmpD[next];
+            }
+          }
         mCurveCache[NUM_CACHE-1] = tmpD[mNumPolygonBands];
+        }
     ///////////////////////////////////////////////////////////////////////////////////////////////////
-...
         return 0.0f;
+        }
     ///////////////////////////////////////////////////////////////////////////////////////////////////
       private float derivative(float x)
+        {
         if( x>=1.0f )
+          {
           return mCurveCache[NUM_CACHE-1];
+          }
         else
+          {
           float tmp = x*(NUM_CACHE-1);
           int i1 = (int)tmp;
           int i2 = i1+1;
           return (tmp-i1)*(mCurveCache[i2]-mCurveCache[i1]) + mCurveCache[i1];
+          }
+        }
     ///////////////////////////////////////////////////////////////////////////////////////////////////
       private void doNormals(float[] attribs1, int index, float quot, int edgeShape,
                              float xEdge, float yEdge, float zEdge, int polyBand)
+        {
         if( ( quot<=0.5f && (edgeShape==SHAPE_UD || edgeShape==SHAPE_UU) ) ||
             ( quot> 0.5f && (edgeShape==SHAPE_DU || edgeShape==SHAPE_UU) )  )
+          {
           attribs1[index  ] = 0;
           attribs1[index+1] = 0;
           attribs1[index+2] = 1;
+          }
         else
+          {
           float t = mPolygonBands[2*mNumPolygonBands-1];
           float x = 1.0f - mPolygonBands[2*polyBand];
           float d = derivative(x);
           d *= ((t-zEdge)/t);
           float vx = d*xEdge;
           float vy = d*yEdge;
           float vz = xEdge*xEdge + yEdge*yEdge;
           float len = (float)Math.sqrt(vx*vx + vy*vy + vz*vz);
           attribs1[index  ] = vx/len;
           attribs1[index+1] = vy/len;
           attribs1[index+2] = vz/len;
+          }
+        }
     ///////////////////////////////////////////////////////////////////////////////////////////////////
       private int addVertex(int vertex, int polyBand, int polyVertex, int polyEndVer, float quot,
-...
         float yEdge = Yfirst + quot*(Ylast-Yfirst);
         float zEdge;
         float q = mPolygonBands[2*polyBand];
         float o = mPolygonBands[2*polyBand+1];
         float t = mPolygonBands[2*mNumPolygonBands-1];
         switch(edgeShape)
+          {
           case SHAPE_DD : zEdge = 0.0f;
                           break;
           case SHAPE_UU : zEdge = mPolygonBands[2*mNumPolygonBands-1];
                           break;
           case SHAPE_DU : zEdge = quot>=0.5f ? mPolygonBands[2*mNumPolygonBands-1] : computeZEdge(1-2*quot);
                           break;
           case SHAPE_UD : zEdge = quot<=0.5f ? mPolygonBands[2*mNumPolygonBands-1] : computeZEdge(2*quot-1);
                           break;
           default       : zEdge = quot<=0.5f ? computeZEdge(1-2*quot) : computeZEdge(2*quot-1);
                           break;
           case SHAPE_DD : zEdge = 0.0f; break;
           case SHAPE_UU : zEdge = t;    break;
           case SHAPE_DU : zEdge = quot>=0.5f ? t : computeZEdge(1-2*quot); break;
           case SHAPE_UD : zEdge = quot<=0.5f ? t : computeZEdge(2*quot-1); break;
           default       : zEdge = quot<=0.5f ? computeZEdge(1-2*quot) : computeZEdge(2*quot-1); break;
+          }
         float q =  mPolygonBands[2*polyBand];
         float x = q*xEdge;
         float y = q*yEdge;
         float z = q*zEdge + mPolygonBands[2*polyBand+1];
         float z = o + (t-o)*(zEdge/t);
         attribs1[VERT1_ATTRIBS*vertex + POS_ATTRIB  ] = x;
         attribs1[VERT1_ATTRIBS*vertex + POS_ATTRIB+1] = y;
         attribs1[VERT1_ATTRIBS*vertex + POS_ATTRIB+2] = z;
         int index = VERT1_ATTRIBS*vertex + NOR_ATTRIB;
         if( quot==0.0f || quot==1.0f )
+          {
           float vx = mBandQuot[polyBand]*xEdge;
           float vy = mBandQuot[polyBand]*yEdge;
           float vz = xEdge*xEdge + yEdge*yEdge;
           float len = (float)Math.sqrt(vx*vx + vy*vy + vz*vz);
           attribs1[index  ] = vx/len;
           attribs1[index+1] = vy/len;
           attribs1[index+2] = vz/len;
+          }
         else
+          {
           attribs1[index  ] = NOT_DONE_YET;
+          }
         doNormals(attribs1,index, quot, edgeShape, xEdge, yEdge, zEdge, polyBand);
         attribs2[VERT2_ATTRIBS*vertex + TEX_ATTRIB  ] = x+0.5f;
         attribs2[VERT2_ATTRIBS*vertex + TEX_ATTRIB+1] = y+0.5f;
-...
         return vertex+1;
+        }
     ///////////////////////////////////////////////////////////////////////////////////////////////////
       private void addVertexNormal(int vertex, int end1, int end2, float[] attribs1)
+        {
         // android.util.Log.e("D", "vertex="+vertex+" end1="+end1+" end2="+end2);
         int index = VERT1_ATTRIBS*vertex + NOR_ATTRIB;
         if( attribs1[index] == NOT_DONE_YET)
+          {
           int iv = VERT1_ATTRIBS*vertex + POS_ATTRIB;
           int i1 = VERT1_ATTRIBS*end1   + POS_ATTRIB;
           int i2 = VERT1_ATTRIBS*end2   + POS_ATTRIB;
           float vx = attribs1[iv  ];
           float vy = attribs1[iv+1];
           float vz = attribs1[iv+2];
           float x1 = attribs1[i1  ];
           float y1 = attribs1[i1+1];
           float z1 = attribs1[i1+2];
           float x2 = attribs1[i2  ];
           float y2 = attribs1[i2+1];
           float z2 = attribs1[i2+2];
           float dx1 = vx-x1;
           float dy1 = vy-y1;
           float dz1 = vz-z1;
           float dx2 = vx-x2;
           float dy2 = vy-y2;
           float dz2 = vz-z2;
           float cx = dy1*dz2 - dz1*dy2;
           float cy = dz1*dx2 - dx1*dz2;
           float cz = dx1*dy2 - dy1*dx2;
           float len = (float)Math.sqrt(cx*cx + cy*cy + cz*cz);
           attribs1[index  ] = cx/len;
           attribs1[index+1] = cy/len;
           attribs1[index+2] = cz/len;
+          }
+        }
     ///////////////////////////////////////////////////////////////////////////////////////////////////
       private int createBandStrip(int vertex, int polyBand, int polyVertex, int edgeShape, float[] attribs1, float[] attribs2)
+        {
         int initVertex = vertex;
         if( polyVertex==0 )
+          {
           vertex = addVertex(vertex,polyBand,0,1,0,edgeShape,attribs1,attribs2);
-...
           vertex = addVertex(vertex,polyBand  ,polyVertex,polyEndVer,quot2,edgeShape,attribs1,attribs2);
+          }
         if( polyVertex==0 )
+          {
           if( polyBand>0 ) addVertexNormal(initVertex,initVertex+3,initVertex+2,attribs1);
           else             addVertexNormal(initVertex,initVertex+2,initVertex+1,attribs1);
+          }
         else
+          {
           addVertexNormal(initVertex,initVertex-1,initVertex+1,attribs1);
+          }
         boolean lower = (polyVertex>0 || polyBand>0);
         for(int index=initVertex+1; index<vertex-1; index++)
+          {
           addVertexNormal(index,(lower ? index+2 : index-1),index+1,attribs1);
           lower = !lower;
+          }
         addVertexNormal(vertex-1,vertex-2,vertex-3,attribs1);
         return vertex;
+        }

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Distorted Android

Revision d3287c14

Added by Leszek Koltunski 11 months ago