static boolean getNormal(Point3f p1, Point3f p2, Point3f p3, Vector3f normal) {
Vector3f v1 = new Vector3f();
Vector3f v2 = new Vector3f();
// Must compute normal
v1.sub(p2, p1);
v2.sub(p2, p3);
normal.cross(v1, v2);
normal.negate();
float length = normal.length();
if (length > 0) {
length = 1 / length;
normal.x *= length;
normal.y *= length;
normal.z *= length;
return true;
}
return false;
}
// Triangulate glyph with 'unicode' if not already done.
GeometryArrayRetained triangulateGlyphs(GlyphVector gv, char c) {
Character ch = new Character(c);
GeometryArrayRetained geo = geomHash.get(ch);
if (geo == null) {
// Font Y-axis is downwards, so send affine transform to flip it.
Rectangle2D bnd = gv.getVisualBounds();
AffineTransform aTran = new AffineTransform();
double tx = bnd.getX() + 0.5 * bnd.getWidth();
double ty = bnd.getY() + 0.5 * bnd.getHeight();
aTran.setToTranslation(-tx, -ty);
aTran.scale(1.0, -1.0);
aTran.translate(tx, -ty);
Shape shape = gv.getOutline();
PathIterator pIt = shape.getPathIterator(aTran, tessellationTolerance);
int flag = -1, numPoints = 0, i, j, k, num = 0, vertCnt;
UnorderList coords = new UnorderList(100, Point3f.class);
float tmpCoords[] = new float[6];
float lastX = .0f, lastY = .0f;
float firstPntx = Float.MAX_VALUE, firstPnty = Float.MAX_VALUE;
IntVector contours = new IntVector();
float maxY = -Float.MAX_VALUE;
int maxYIndex = 0, beginIdx = 0, endIdx = 0, start = 0;
boolean setMaxY = false;
while (!pIt.isDone()) {
Point3f vertex = new Point3f();
flag = pIt.currentSegment(tmpCoords);
if (flag == PathIterator.SEG_CLOSE) {
if (num > 0) {
if (setMaxY) {
// Get Previous point
beginIdx = start;
endIdx = numPoints - 1;
}
contours.add(num);
num = 0;
}
} else if (flag == PathIterator.SEG_MOVETO) {
vertex.x = tmpCoords[0];
vertex.y = tmpCoords[1];
lastX = vertex.x;
lastY = vertex.y;
if ((lastX == firstPntx) && (lastY == firstPnty)) {
pIt.next();
continue;
}
setMaxY = false;
coords.add(vertex);
firstPntx = lastX;
firstPnty = lastY;
if (num > 0) {
contours.add(num);
num = 0;
}
num++;
numPoints++;
// skip checking of first point,
// since the last point will repeat this.
start = numPoints;
} else if (flag == PathIterator.SEG_LINETO) {
vertex.x = tmpCoords[0];
vertex.y = tmpCoords[1];
// Check here for duplicate points. Code
// later in this function can not handle
// duplicate points.
if ((vertex.x == lastX) && (vertex.y == lastY)) {
pIt.next();
continue;
}
if (vertex.y > maxY) {
maxY = vertex.y;
maxYIndex = numPoints;
setMaxY = true;
}
lastX = vertex.x;
lastY = vertex.y;
coords.add(vertex);
num++;
numPoints++;
}
pIt.next();
}
// No data(e.g space, control characters)
// Two point can't form a valid contour
if (numPoints == 0) {
return null;
}
// Determine font winding order use for side triangles
Point3f p1 = new Point3f(), p2 = new Point3f(), p3 = new Point3f();
boolean flip_side_orient = true;
Point3f vertices[] = (Point3f[]) coords.toArray(false);
if (endIdx - beginIdx > 0) {
// must be true unless it is a single line
// define as "MoveTo p1 LineTo p2 Close" which is
// not a valid font definition.
if (maxYIndex == beginIdx) {
p1.set(vertices[endIdx]);
} else {
p1.set(vertices[maxYIndex - 1]);
}
p2.set(vertices[maxYIndex]);
if (maxYIndex == endIdx) {
p3.set(vertices[beginIdx]);
} else {
p3.set(vertices[maxYIndex + 1]);
}
if (p3.x != p2.x) {
if (p1.x != p2.x) {
// Use the one with smallest slope
if (Math.abs((p2.y - p1.y) / (p2.x - p1.x)) > Math.abs((p3.y - p2.y) / (p3.x - p2.x))) {
flip_side_orient = (p3.x > p2.x);
} else {
flip_side_orient = (p2.x > p1.x);
}
} else {
flip_side_orient = (p3.x > p2.x);
}
} else {
// p1.x != p2.x, otherwise all three
// point form a straight vertical line with
// the middle point the highest. This is not a
// valid font definition.
flip_side_orient = (p2.x > p1.x);
}
}
// Build a Tree of Islands
int startIdx = 0;
IslandsNode islandsTree = new IslandsNode(-1, -1);
for (int cIdx = 0; cIdx < contours.size; cIdx++) {
endIdx = startIdx + contours.data[cIdx];
islandsTree.insert(new IslandsNode(startIdx, endIdx), vertices);
startIdx = endIdx;
}
coords = null; // Free memory
contours = null;
// Compute islandCounts[][] and outVerts[][]
UnorderList islandsList = new UnorderList(10, IslandsNode.class);
islandsTree.collectOddLevelNode(islandsList, 0);
IslandsNode nodes[] = (IslandsNode[]) islandsList.toArray(false);
int islandCounts[][] = new int[islandsList.arraySize()][];
Point3f outVerts[][] = new Point3f[islandCounts.length][];
int nchild, sum;
IslandsNode node;
for (i = 0; i < islandCounts.length; i++) {
node = nodes[i];
nchild = node.numChild();
islandCounts[i] = new int[nchild + 1];
islandCounts[i][0] = node.numVertices();
sum = 0;
sum += islandCounts[i][0];
for (j = 0; j < nchild; j++) {
islandCounts[i][j + 1] = node.getChild(j).numVertices();
sum += islandCounts[i][j + 1];
}
outVerts[i] = new Point3f[sum];
startIdx = 0;
for (k = node.startIdx; k < node.endIdx; k++) {
outVerts[i][startIdx++] = vertices[k];
}
for (j = 0; j < nchild; j++) {
endIdx = node.getChild(j).endIdx;
for (k = node.getChild(j).startIdx; k < endIdx; k++) {
outVerts[i][startIdx++] = vertices[k];
}
}
}
islandsTree = null; // Free memory
islandsList = null;
vertices = null;
int[] contourCounts = new int[1];
ArrayList<GeometryArray> triangData = new ArrayList<GeometryArray>();
Point3f q1 = new Point3f(), q2 = new Point3f(), q3 = new Point3f();
Vector3f n1 = new Vector3f(), n2 = new Vector3f();
numPoints = 0;
for (i = 0; i < islandCounts.length; i++) {
numPoints += outVerts[i].length;
}
final GeometryService gs = newGeometryService();
int vertOffset = gs.triangulateIslands(islandCounts, outVerts, contourCounts, triangData);
// Multiply by 2 since we create 2 faces of the font
// Second term is for side-faces along depth of the font
if (fontExtrusion == null) vertCnt = vertOffset;
else {
if (fontExtrusion.shape == null) vertCnt = vertOffset * 2 + numPoints * 6;
else {
vertCnt = vertOffset * 2 + numPoints * 6 * (fontExtrusion.pnts.length - 1);
}
}
// XXXX: Should use IndexedTriangleArray to avoid
// duplication of vertices. To create triangles for
// side faces, every vertex is duplicated currently.
TriangleArray triAry =
new TriangleArray(vertCnt, GeometryArray.COORDINATES | GeometryArray.NORMALS);
boolean flip_orient[] = new boolean[islandCounts.length];
boolean findOrient;
// last known non-degenerate normal
Vector3f goodNormal = new Vector3f();
int currCoordIndex = 0;
for (j = 0; j < islandCounts.length; j++) {
GeometryArray ga = triangData.get(j);
vertOffset = ga.getVertexCount();
findOrient = false;
// Create the triangle array
for (i = 0; i < vertOffset; i += 3, currCoordIndex += 3) {
// Get 3 points. Since triangle is known to be flat, normal
// must be same for all 3 points.
ga.getCoordinate(i, p1);
ga.getNormal(i, n1);
ga.getCoordinate(i + 1, p2);
ga.getCoordinate(i + 2, p3);
if (!findOrient) {
// Check here if triangles are wound incorrectly and need
// to be flipped.
if (!getNormal(p1, p2, p3, n2)) {
continue;
}
if (n2.z >= EPS) {
flip_orient[j] = false;
} else if (n2.z <= -EPS) {
flip_orient[j] = true;
} else {
continue;
}
findOrient = true;
}
if (flip_orient[j]) {
// New Triangulator preserves contour orientation. If contour
// input is wound incorrectly, swap 2nd and 3rd points to
// sure all triangles are wound correctly for j3d.
q1.x = p2.x;
q1.y = p2.y;
q1.z = p2.z;
p2.x = p3.x;
p2.y = p3.y;
p2.z = p3.z;
p3.x = q1.x;
p3.y = q1.y;
p3.z = q1.z;
n1.x = -n1.x;
n1.y = -n1.y;
n1.z = -n1.z;
}
if (fontExtrusion != null) {
n2.x = -n1.x;
n2.y = -n1.y;
n2.z = -n1.z;
triAry.setCoordinate(currCoordIndex, p1);
triAry.setNormal(currCoordIndex, n2);
triAry.setCoordinate(currCoordIndex + 1, p3);
triAry.setNormal(currCoordIndex + 1, n2);
triAry.setCoordinate(currCoordIndex + 2, p2);
triAry.setNormal(currCoordIndex + 2, n2);
q1.x = p1.x;
q1.y = p1.y;
q1.z = p1.z + fontExtrusion.length;
q2.x = p2.x;
q2.y = p2.y;
q2.z = p2.z + fontExtrusion.length;
q3.x = p3.x;
q3.y = p3.y;
q3.z = p3.z + fontExtrusion.length;
triAry.setCoordinate(currCoordIndex + vertOffset, q1);
triAry.setNormal(currCoordIndex + vertOffset, n1);
triAry.setCoordinate(currCoordIndex + 1 + vertOffset, q2);
triAry.setNormal(currCoordIndex + 1 + vertOffset, n1);
triAry.setCoordinate(currCoordIndex + 2 + vertOffset, q3);
triAry.setNormal(currCoordIndex + 2 + vertOffset, n1);
} else {
triAry.setCoordinate(currCoordIndex, p1);
triAry.setNormal(currCoordIndex, n1);
triAry.setCoordinate(currCoordIndex + 1, p2);
triAry.setNormal(currCoordIndex + 1, n1);
triAry.setCoordinate(currCoordIndex + 2, p3);
triAry.setNormal(currCoordIndex + 2, n1);
}
}
if (fontExtrusion != null) {
currCoordIndex += vertOffset;
}
}
// Now add side triangles in both cases.
// Since we duplicated triangles with different Z, make sure
// currCoordIndex points to correct location.
if (fontExtrusion != null) {
if (fontExtrusion.shape == null) {
boolean smooth;
// we'll put a crease if the angle between the normals is
// greater than 44 degrees
float threshold = (float) Math.cos(44.0 * Math.PI / 180.0);
float cosine;
// need the previous normals to check for smoothing
Vector3f pn1 = null, pn2 = null;
// need the next normals to check for smoothing
Vector3f n3 = new Vector3f(), n4 = new Vector3f();
// store the normals for each point because they are
// the same for both triangles
Vector3f p1Normal = new Vector3f();
Vector3f p2Normal = new Vector3f();
Vector3f p3Normal = new Vector3f();
Vector3f q1Normal = new Vector3f();
Vector3f q2Normal = new Vector3f();
Vector3f q3Normal = new Vector3f();
for (i = 0; i < islandCounts.length; i++) {
for (j = 0, k = 0, num = 0; j < islandCounts[i].length; j++) {
num += islandCounts[i][j];
p1.x = outVerts[i][num - 1].x;
p1.y = outVerts[i][num - 1].y;
p1.z = 0.0f;
q1.x = p1.x;
q1.y = p1.y;
q1.z = p1.z + fontExtrusion.length;
p2.z = 0.0f;
q2.z = p2.z + fontExtrusion.length;
for (int m = 0; m < num; m++) {
p2.x = outVerts[i][m].x;
p2.y = outVerts[i][m].y;
q2.x = p2.x;
q2.y = p2.y;
if (getNormal(p1, q1, p2, n1)) {
if (!flip_side_orient) {
n1.negate();
}
goodNormal.set(n1);
break;
}
}
for (; k < num; k++) {
p2.x = outVerts[i][k].x;
p2.y = outVerts[i][k].y;
p2.z = 0.0f;
q2.x = p2.x;
q2.y = p2.y;
q2.z = p2.z + fontExtrusion.length;
if (!getNormal(p1, q1, p2, n1)) {
n1.set(goodNormal);
} else {
if (!flip_side_orient) {
n1.negate();
}
goodNormal.set(n1);
}
if (!getNormal(p2, q1, q2, n2)) {
n2.set(goodNormal);
} else {
if (!flip_side_orient) {
n2.negate();
}
goodNormal.set(n2);
}
// if there is a previous normal, see if we need to smooth
// this normal or make a crease
if (pn1 != null) {
cosine = n1.dot(pn2);
smooth = cosine > threshold;
if (smooth) {
p1Normal.x = (pn1.x + pn2.x + n1.x);
p1Normal.y = (pn1.y + pn2.y + n1.y);
p1Normal.z = (pn1.z + pn2.z + n1.z);
normalize(p1Normal);
q1Normal.x = (pn2.x + n1.x + n2.x);
q1Normal.y = (pn2.y + n1.y + n2.y);
q1Normal.z = (pn2.z + n1.z + n2.z);
normalize(q1Normal);
} // if smooth
else {
p1Normal.x = n1.x;
p1Normal.y = n1.y;
p1Normal.z = n1.z;
q1Normal.x = n1.x + n2.x;
q1Normal.y = n1.y + n2.y;
q1Normal.z = n1.z + n2.z;
normalize(q1Normal);
} // else
} // if pn1 != null
else {
pn1 = new Vector3f();
pn2 = new Vector3f();
p1Normal.x = n1.x;
p1Normal.y = n1.y;
p1Normal.z = n1.z;
q1Normal.x = (n1.x + n2.x);
q1Normal.y = (n1.y + n2.y);
q1Normal.z = (n1.z + n2.z);
normalize(q1Normal);
} // else
// if there is a next, check if we should smooth normal
if (k + 1 < num) {
p3.x = outVerts[i][k + 1].x;
p3.y = outVerts[i][k + 1].y;
p3.z = 0.0f;
q3.x = p3.x;
q3.y = p3.y;
q3.z = p3.z + fontExtrusion.length;
if (!getNormal(p2, q2, p3, n3)) {
n3.set(goodNormal);
} else {
if (!flip_side_orient) {
n3.negate();
}
goodNormal.set(n3);
}
if (!getNormal(p3, q2, q3, n4)) {
n4.set(goodNormal);
} else {
if (!flip_side_orient) {
n4.negate();
}
goodNormal.set(n4);
}
cosine = n2.dot(n3);
smooth = cosine > threshold;
if (smooth) {
p2Normal.x = (n1.x + n2.x + n3.x);
p2Normal.y = (n1.y + n2.y + n3.y);
p2Normal.z = (n1.z + n2.z + n3.z);
normalize(p2Normal);
q2Normal.x = (n2.x + n3.x + n4.x);
q2Normal.y = (n2.y + n3.y + n4.y);
q2Normal.z = (n2.z + n3.z + n4.z);
normalize(q2Normal);
} else { // if smooth
p2Normal.x = n1.x + n2.x;
p2Normal.y = n1.y + n2.y;
p2Normal.z = n1.z + n2.z;
normalize(p2Normal);
q2Normal.x = n2.x;
q2Normal.y = n2.y;
q2Normal.z = n2.z;
} // else
} else { // if k+1 < num
p2Normal.x = (n1.x + n2.x);
p2Normal.y = (n1.y + n2.y);
p2Normal.z = (n1.z + n2.z);
normalize(p2Normal);
q2Normal.x = n2.x;
q2Normal.y = n2.y;
q2Normal.z = n2.z;
} // else
// add pts for the 2 tris
// p1, q1, p2 and p2, q1, q2
if (flip_side_orient) {
triAry.setCoordinate(currCoordIndex, p1);
triAry.setNormal(currCoordIndex, p1Normal);
currCoordIndex++;
triAry.setCoordinate(currCoordIndex, q1);
triAry.setNormal(currCoordIndex, q1Normal);
currCoordIndex++;
triAry.setCoordinate(currCoordIndex, p2);
triAry.setNormal(currCoordIndex, p2Normal);
currCoordIndex++;
triAry.setCoordinate(currCoordIndex, p2);
triAry.setNormal(currCoordIndex, p2Normal);
currCoordIndex++;
triAry.setCoordinate(currCoordIndex, q1);
triAry.setNormal(currCoordIndex, q1Normal);
currCoordIndex++;
} else {
triAry.setCoordinate(currCoordIndex, q1);
triAry.setNormal(currCoordIndex, q1Normal);
currCoordIndex++;
triAry.setCoordinate(currCoordIndex, p1);
triAry.setNormal(currCoordIndex, p1Normal);
currCoordIndex++;
triAry.setCoordinate(currCoordIndex, p2);
triAry.setNormal(currCoordIndex, p2Normal);
currCoordIndex++;
triAry.setCoordinate(currCoordIndex, q1);
triAry.setNormal(currCoordIndex, q1Normal);
currCoordIndex++;
triAry.setCoordinate(currCoordIndex, p2);
triAry.setNormal(currCoordIndex, p2Normal);
currCoordIndex++;
}
triAry.setCoordinate(currCoordIndex, q2);
triAry.setNormal(currCoordIndex, q2Normal);
currCoordIndex++;
pn1.x = n1.x;
pn1.y = n1.y;
pn1.z = n1.z;
pn2.x = n2.x;
pn2.y = n2.y;
pn2.z = n2.z;
p1.x = p2.x;
p1.y = p2.y;
p1.z = p2.z;
q1.x = q2.x;
q1.y = q2.y;
q1.z = q2.z;
} // for k
// set the previous normals to null when we are done
pn1 = null;
pn2 = null;
} // for j
} // for i
} else { // if shape
int m, offset = 0;
Point3f P2 = new Point3f(), Q2 = new Point3f(), P1 = new Point3f();
Vector3f nn = new Vector3f(),
nn1 = new Vector3f(),
nn2 = new Vector3f(),
nn3 = new Vector3f();
Vector3f nna = new Vector3f(), nnb = new Vector3f();
float length;
boolean validNormal = false;
// fontExtrusion.shape is specified, and is NOT straight line
for (i = 0; i < islandCounts.length; i++) {
for (j = 0, k = 0, offset = num = 0; j < islandCounts[i].length; j++) {
num += islandCounts[i][j];
p1.x = outVerts[i][num - 1].x;
p1.y = outVerts[i][num - 1].y;
p1.z = 0.0f;
q1.x = p1.x;
q1.y = p1.y;
q1.z = p1.z + fontExtrusion.length;
p3.z = 0.0f;
for (m = num - 2; m >= 0; m--) {
p3.x = outVerts[i][m].x;
p3.y = outVerts[i][m].y;
if (getNormal(p3, q1, p1, nn1)) {
if (!flip_side_orient) {
nn1.negate();
}
goodNormal.set(nn1);
break;
}
}
for (; k < num; k++) {
p2.x = outVerts[i][k].x;
p2.y = outVerts[i][k].y;
p2.z = 0.0f;
q2.x = p2.x;
q2.y = p2.y;
q2.z = p2.z + fontExtrusion.length;
getNormal(p1, q1, p2, nn2);
p3.x = outVerts[i][(k + 1) == num ? offset : (k + 1)].x;
p3.y = outVerts[i][(k + 1) == num ? offset : (k + 1)].y;
p3.z = 0.0f;
if (!getNormal(p3, p2, q2, nn3)) {
nn3.set(goodNormal);
} else {
if (!flip_side_orient) {
nn3.negate();
}
goodNormal.set(nn3);
}
// Calculate normals at the point by averaging normals
// of two faces on each side of the point.
nna.x = (nn1.x + nn2.x);
nna.y = (nn1.y + nn2.y);
nna.z = (nn1.z + nn2.z);
normalize(nna);
nnb.x = (nn3.x + nn2.x);
nnb.y = (nn3.y + nn2.y);
nnb.z = (nn3.z + nn2.z);
normalize(nnb);
P1.x = p1.x;
P1.y = p1.y;
P1.z = p1.z;
P2.x = p2.x;
P2.y = p2.y;
P2.z = p2.z;
Q2.x = q2.x;
Q2.y = q2.y;
Q2.z = q2.z;
for (m = 1; m < fontExtrusion.pnts.length; m++) {
q1.z = q2.z = fontExtrusion.pnts[m].x;
q1.x = P1.x + nna.x * fontExtrusion.pnts[m].y;
q1.y = P1.y + nna.y * fontExtrusion.pnts[m].y;
q2.x = P2.x + nnb.x * fontExtrusion.pnts[m].y;
q2.y = P2.y + nnb.y * fontExtrusion.pnts[m].y;
if (!getNormal(p1, q1, p2, n1)) {
n1.set(goodNormal);
} else {
if (!flip_side_orient) {
n1.negate();
}
goodNormal.set(n1);
}
if (flip_side_orient) {
triAry.setCoordinate(currCoordIndex, p1);
triAry.setNormal(currCoordIndex, n1);
currCoordIndex++;
triAry.setCoordinate(currCoordIndex, q1);
triAry.setNormal(currCoordIndex, n1);
currCoordIndex++;
} else {
triAry.setCoordinate(currCoordIndex, q1);
triAry.setNormal(currCoordIndex, n1);
currCoordIndex++;
triAry.setCoordinate(currCoordIndex, p1);
triAry.setNormal(currCoordIndex, n1);
currCoordIndex++;
}
triAry.setCoordinate(currCoordIndex, p2);
triAry.setNormal(currCoordIndex, n1);
currCoordIndex++;
if (!getNormal(p2, q1, q2, n1)) {
n1.set(goodNormal);
} else {
if (!flip_side_orient) {
n1.negate();
}
goodNormal.set(n1);
}
if (flip_side_orient) {
triAry.setCoordinate(currCoordIndex, p2);
triAry.setNormal(currCoordIndex, n1);
currCoordIndex++;
triAry.setCoordinate(currCoordIndex, q1);
triAry.setNormal(currCoordIndex, n1);
currCoordIndex++;
} else {
triAry.setCoordinate(currCoordIndex, q1);
triAry.setNormal(currCoordIndex, n1);
currCoordIndex++;
triAry.setCoordinate(currCoordIndex, p2);
triAry.setNormal(currCoordIndex, n1);
currCoordIndex++;
}
triAry.setCoordinate(currCoordIndex, q2);
triAry.setNormal(currCoordIndex, n1);
currCoordIndex++;
p1.x = q1.x;
p1.y = q1.y;
p1.z = q1.z;
p2.x = q2.x;
p2.y = q2.y;
p2.z = q2.z;
} // for m
p1.x = P2.x;
p1.y = P2.y;
p1.z = P2.z;
q1.x = Q2.x;
q1.y = Q2.y;
q1.z = Q2.z;
nn1.x = nn2.x;
nn1.y = nn2.y;
nn1.z = nn2.z;
} // for k
offset = num;
} // for j
} // for i
} // if shape
} // if fontExtrusion
geo = (GeometryArrayRetained) triAry.retained;
geomHash.put(ch, geo);
}
return geo;
}