Revision d456b075
Added by Leszek Koltunski about 4 years ago
| src/main/java/org/distorted/library/mesh/MeshPolygon.java | ||
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| 36 | 36 |
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| 37 | 37 |
private int remainingVert; |
| 38 | 38 |
private int numVertices; |
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private int extraIndex, extraVertices; |
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| 39 | 40 |
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private float[] mBandQuot; |
| 41 | 42 |
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/////////////////////////////////////////////////////////////////////////////////////////////////// |
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// polygonVertices>=3 , polygonBands>=2 |
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private void computeNumberOfVertices(int numPolygonVertices, int numPolygonBands)
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private void computeNumberOfVertices() |
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{
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numVertices = (numPolygonVertices*numPolygonBands+2)*(numPolygonBands-1) - 1; |
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numVertices = (mNumPolygonVertices*mNumPolygonBands+2)*(mNumPolygonBands-1) - 1; |
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numVertices+= 2*mNumPolygonVertices*(2*extraIndex*extraVertices); |
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remainingVert = numVertices; |
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} |
| 50 | 53 |
|
| ... | ... | |
| 67 | 70 |
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/////////////////////////////////////////////////////////////////////////////////////////////////// |
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private int addVertex(int vertex, int polyBand, int polyVertex, int polyEndVer, int index, float[] attribs1, float[] attribs2)
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private float getQuot(int index, int band, boolean isExtra)
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{
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remainingVert--;
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int num = mNumPolygonBands-1-band;
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float quot = polyBand<mNumPolygonBands-1 ? (float)index / (mNumPolygonBands-1-polyBand) : 1.0f; |
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if( num>0 ) |
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{
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if( isExtra ) |
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{
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int extra = extraIndex-band+extraVertices; |
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if( index < extra ) |
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{
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float quot = ((float)extraIndex-band)/(extra*num); |
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return index*quot; |
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} |
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else if( index > num+2*extraVertices-extra ) |
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{
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float quot = ((float)extraIndex-band)/(extra*num); |
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return (1.0f-((float)extraIndex-band)/num) + (index-num-2*extraVertices+extra)*quot; |
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} |
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else |
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{
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return ((float)(index-extraVertices))/num; |
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} |
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} |
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float vx,vy,vz; |
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return (float)index/num; |
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} |
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return 1.0f; |
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} |
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/////////////////////////////////////////////////////////////////////////////////////////////////// |
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private int addVertex(int vertex, int polyBand, int polyVertex, int polyEndVer, float quot, float[] attribs1, float[] attribs2) |
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{
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remainingVert--; |
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float vx,vy,vz; |
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float Xfirst= mPolygonVertices[2*polyVertex ]; |
| 79 | 113 |
float Yfirst= mPolygonVertices[2*polyVertex+1]; |
| 80 | 114 |
float Xlast = mPolygonVertices[2*polyEndVer ]; |
| ... | ... | |
| 131 | 165 |
} |
| 132 | 166 |
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int numPairs = mNumPolygonBands-1-polyBand; |
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boolean isExtra = polyBand<extraIndex; |
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if( isExtra ) |
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{
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numPairs += 2*extraVertices; |
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} |
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int polyEndVer = polyVertex==mNumPolygonVertices-1 ? 0 : polyVertex+1; |
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float quot1, quot2; |
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for(int index=0; index<numPairs; index++) |
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{
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vertex = addVertex(vertex,polyBand+1,polyVertex,polyEndVer,index ,attribs1,attribs2); |
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vertex = addVertex(vertex,polyBand ,polyVertex,polyEndVer,index+1,attribs1,attribs2); |
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quot1 = getQuot(index ,polyBand+1, isExtra); |
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quot2 = getQuot(index+1,polyBand , isExtra); |
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vertex = addVertex(vertex,polyBand+1,polyVertex,polyEndVer,quot1,attribs1,attribs2); |
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vertex = addVertex(vertex,polyBand ,polyVertex,polyEndVer,quot2,attribs1,attribs2); |
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| 140 | 185 |
} |
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return vertex; |
| ... | ... | |
| 160 | 205 |
/////////////////////////////////////////////////////////////////////////////////////////////////// |
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/** |
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* Create a polygon of any shape and varying elevations from the edges towards the center. |
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* Optionally make it more dense at the vertices. |
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* |
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* @param verticesXY 2N floats - packed description of polygon vertices. N pairs (x,y). |
| 165 | 211 |
* @param bands 2K floats; K pairs of two floats each describing a single band. |
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* From (1.0,Z[0]) (outer edge, its Z elevation) to (0.0,Z[K]) (the center, |
| 167 | 213 |
* its elevation). The polygon is split into such concentric bands. |
| 168 | 214 |
* Must be band[2*i] > band[2*(i+1)] ! |
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* @param exIndex This and the next parameter describe how to make the mesh denser at the |
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* polyVertices. If e.g. exIndex=3 and exVertices=2, then 3 triangles of the |
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* outermost band (and 2 traingles of the next band, and 1 triange of the third |
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* band) get denser - the 3 triangles become 3+2 = 5. |
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* @param exVertices See above. |
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*/ |
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public MeshPolygon(float[] verticesXY, float[] bands) |
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public MeshPolygon(float[] verticesXY, float[] bands, int exIndex, int exVertices)
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{
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super(); |
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mPolygonVertices = verticesXY; |
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mPolygonBands = bands; |
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mNumPolygonVertices = mPolygonVertices.length /2; |
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mNumPolygonBands = mPolygonBands.length /2; |
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mPolygonVertices = verticesXY; |
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mPolygonBands = bands; |
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mNumPolygonVertices= mPolygonVertices.length /2; |
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mNumPolygonBands = mPolygonBands.length /2; |
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extraIndex = exIndex; |
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extraVertices = exVertices; |
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computeNumberOfVertices(mNumPolygonVertices,mNumPolygonBands);
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computeNumberOfVertices(); |
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computeCache(); |
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float[] attribs1= new float[VERT1_ATTRIBS*numVertices]; |
| ... | ... | |
| 190 | 243 |
setAttribs(attribs1,attribs2); |
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} |
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/////////////////////////////////////////////////////////////////////////////////////////////////// |
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/** |
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* Create a polygon of any shape and varying elevations from the edges towards the center. |
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* Equivalent of the previous with exIndex=0 or exVertices=0. |
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*/ |
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public MeshPolygon(float[] verticesXY, float[] bands) |
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{
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this(verticesXY,bands,0,0); |
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} |
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/////////////////////////////////////////////////////////////////////////////////////////////////// |
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/** |
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* Copy constructor. |
Also available in: Unified diff
Add an extra option to MeshPolygon: making triangles located around the vertices of the polygon smaller.