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Tessellator: process all polygons from GeometryBuffer

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(not just the first)
This commit is contained in:
Hannes Janetzek
2014-01-22 22:51:20 +01:00
parent a0586a1897
commit 36d540da18
3 changed files with 236 additions and 127 deletions
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139
vtm/src/org/oscim/utils/Tessellator.java
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@@ -125,9 +125,6 @@ public class Tessellator {
int[] result = new int[2];
//int numPoints = 0;
//for (int i = 0; i < rings; i++)
// numPoints += index[ipos + i];
int numRings = 0;
int numPoints = 0;
@@ -143,10 +140,6 @@ public class Tessellator {
geom.index, 0,
numRings, result);
//log.debug("got "
// + result[RESULT_VERTICES] + " "
// + result[RESULT_TRIANGLES]);
boolean verticesAdded = false;
if (numPoints < result[RESULT_VERTICES] * 2) {
//log.debug("grow vertices" + geom.pointPos);
@@ -190,82 +183,96 @@ public class Tessellator {
public static int tessellate(GeometryBuffer geom, float scale,
VertexItem outPoints, VertexItem outTris, int vertexOffset) {
int numIndices = 0;
int indexPos = 0;
int pointPos = 0;
int indexEnd = geom.index.length;
int[] result = new int[2];
//int numPoints = 0;
//for (int i = 0; i < rings; i++)
// numPoints += index[ipos + i];
float s = scale;
scale = 1;
int numRings = 0;
int numPoints = 0;
for (int idx = 0; idx < indexEnd && geom.index[idx] > 0; idx++) {
indexPos = idx;
for (int i = 0; i <= geom.indexPos; i++) {
if (geom.index[i] <= 0)
break;
int numRings = 1;
int numPoints = geom.index[idx++];
numRings++;
numPoints += (geom.index[i]) / 2;
}
for (; idx < indexEnd && geom.index[idx] > 0; idx++) {
numRings++;
numPoints += geom.index[idx];
}
if (numRings == 0 || numPoints == 0) {
log.debug("missing " + numPoints + ":" + numRings);
return 0;
}
for (int i = pointPos; i < pointPos + numPoints; i += 2) {
geom.points[i + 0] = (int) (geom.points[i + 0] * s);
geom.points[i + 1] = (int) (geom.points[i + 1] * s);
}
long ctx = Tessellator.tessellate(geom.points, 0,
geom.index, 0,
numRings, result);
long ctx = Tessellator.tessellate(geom.points, pointPos,
geom.index, indexPos,
numRings, result);
if (numPoints >= result[RESULT_VERTICES]) {
// TODO use vertices from geom.points
}
if (outPoints.used == VertexItem.SIZE) {
outPoints = VertexItem.pool.getNext(outPoints);
}
int cnt;
while ((cnt = Tessellator.tessGetVerticesWO(ctx,
outPoints.vertices,
outPoints.used,
scale)) > 0) {
outPoints.used += cnt;
if (outPoints.used == VertexItem.SIZE) {
outPoints = VertexItem.pool.getNext(outPoints);
if (result[RESULT_VERTICES] == 0 || result[RESULT_TRIANGLES] == 0) {
log.debug("ppos " + pointPos + " ipos:" + indexPos +
" rings:" + numRings + " " + Arrays.toString(geom.index));
continue;
}
// no more points to get.
break;
}
int numIndices = 0;
pointPos += numPoints;
if (outTris.used == VertexItem.SIZE)
outTris = VertexItem.pool.getNext(outTris);
while (true) {
int cnt = Tessellator.tessGetIndicesWO(ctx,
outTris.vertices,
outTris.used);
if (cnt <= 0)
break;
// shift by vertexOffset
for (int pos = outTris.used, end = pos + cnt; pos < end; pos++)
outTris.vertices[pos] += vertexOffset;
outTris.used += cnt;
numIndices += cnt;
if (outTris.used < VertexItem.SIZE)
break;
if (outTris.used == VertexItem.SIZE) {
outTris = VertexItem.pool.getNext(outTris);
}
while ((cnt = Tessellator.tessGetIndicesWO(ctx,
outTris.vertices,
outTris.used)) > 0) {
// shift by vertexOffset
for (int pos = outTris.used, end = pos + cnt; pos < end; pos++)
outTris.vertices[pos] += vertexOffset;
outTris.used += cnt;
numIndices += cnt;
if (outTris.used == VertexItem.SIZE) {
outTris = VertexItem.pool.getNext(outTris);
continue;
}
// no more indices to get.
break;
if (outPoints.used == VertexItem.SIZE)
outPoints = VertexItem.pool.getNext(outPoints);
while (true) {
int cnt = Tessellator.tessGetVerticesWO(ctx,
outPoints.vertices,
outPoints.used,
scale);
if (cnt <= 0)
break;
outPoints.used += cnt;
vertexOffset += cnt >> 1;
if (outPoints.used < VertexItem.SIZE)
break;
outPoints = VertexItem.pool.getNext(outPoints);
}
Tessellator.tessFinish(ctx);
if (idx >= indexEnd || geom.index[idx] < 0)
break;
}
Tessellator.tessFinish(ctx);
if (vertexOffset > Short.MAX_VALUE) {
log.debug("too much !!!" + Arrays.toString(geom.index));
}
return numIndices;
}