javax.media.j3d.TriangleStripArrayRetained Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of java3d-core Show documentation
Show all versions of java3d-core Show documentation
Java3D Core And Java3D Util Libraries
The newest version!
/*
* Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Sun designates this
* particular file as subject to the "Classpath" exception as provided
* by Sun in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*
*/
package javax.media.j3d;
import javax.vecmath.Point3d;
import javax.vecmath.Vector3d;
/**
* The TriangleStripArray object draws an array of vertices as a set of
* connected triangle strips. An array of per-strip vertex counts specifies
* where the separate strips appear in the vertex array.
* For every strip in the set,
* each vertex, beginning with the third vertex in the array,
* defines a triangle to be drawn using the current vertex and
* the two previous vertices.
*/
class TriangleStripArrayRetained extends GeometryStripArrayRetained {
TriangleStripArrayRetained() {
this.geoType = GEO_TYPE_TRI_STRIP_SET;
}
@Override
boolean intersect(PickShape pickShape, PickInfo pickInfo, int flags, Point3d iPnt,
GeometryRetained geom, int geomIndex) {
Point3d pnts[] = new Point3d[3];
double sdist[] = new double[1];
double minDist = Double.MAX_VALUE;
double x = 0, y = 0, z = 0;
int i = 0;
int j, end;
pnts[0] = new Point3d();
pnts[1] = new Point3d();
pnts[2] = new Point3d();
int[] vtxIndexArr = new int[3];
switch (pickShape.getPickType()) {
case PickShape.PICKRAY:
PickRay pickRay= (PickRay) pickShape;
while (i < stripVertexCounts.length) {
j = stripStartVertexIndices[i];
end = j + stripVertexCounts[i++];
for(int k=0; k<2; k++) {
vtxIndexArr[k] = j;
getVertexData(j++, pnts[k]);
}
while (j < end) {
vtxIndexArr[2] = j;
getVertexData(j++, pnts[2]);
if (intersectRay(pnts, pickRay, sdist, iPnt)) {
if (flags == 0) {
return true;
}
if (sdist[0] < minDist) {
minDist = sdist[0];
x = iPnt.x;
y = iPnt.y;
z = iPnt.z;
if((flags & PickInfo.CLOSEST_GEOM_INFO) != 0) {
storeInterestData(pickInfo, flags, geom, geomIndex,
vtxIndexArr, iPnt, sdist[0]);
}
}
if((flags & PickInfo.ALL_GEOM_INFO) != 0) {
storeInterestData(pickInfo, flags, geom, geomIndex,
vtxIndexArr, iPnt, sdist[0]);
}
}
pnts[0].set(pnts[1]);
vtxIndexArr[0] = vtxIndexArr[1];
pnts[1].set(pnts[2]);
vtxIndexArr[1] = vtxIndexArr[2];
}
}
break;
case PickShape.PICKSEGMENT:
PickSegment pickSegment = (PickSegment) pickShape;
while (i < stripVertexCounts.length) {
j = stripStartVertexIndices[i];
end = j + stripVertexCounts[i++];
for(int k=0; k<2; k++) {
vtxIndexArr[k] = j;
getVertexData(j++, pnts[k]);
}
while (j < end) {
vtxIndexArr[2] = j;
getVertexData(j++, pnts[2]);
if (intersectSegment(pnts, pickSegment.start,
pickSegment.end, sdist, iPnt)) {
if (flags == 0) {
return true;
}
if (sdist[0] < minDist) {
minDist = sdist[0];
x = iPnt.x;
y = iPnt.y;
z = iPnt.z;
if((flags & PickInfo.CLOSEST_GEOM_INFO) != 0) {
storeInterestData(pickInfo, flags, geom, geomIndex,
vtxIndexArr, iPnt, sdist[0]);
}
}
if((flags & PickInfo.ALL_GEOM_INFO) != 0) {
storeInterestData(pickInfo, flags, geom, geomIndex,
vtxIndexArr, iPnt, sdist[0]);
}
}
pnts[0].set(pnts[1]);
vtxIndexArr[0] = vtxIndexArr[1];
pnts[1].set(pnts[2]);
vtxIndexArr[1] = vtxIndexArr[2];
}
}
break;
case PickShape.PICKBOUNDINGBOX:
BoundingBox bbox = (BoundingBox)
((PickBounds) pickShape).bounds;
while (i < stripVertexCounts.length) {
j = stripStartVertexIndices[i];
end = j + stripVertexCounts[i++];
for(int k=0; k<2; k++) {
vtxIndexArr[k] = j;
getVertexData(j++, pnts[k]);
}
while (j < end) {
vtxIndexArr[2] = j;
getVertexData(j++, pnts[2]);
if (intersectBoundingBox(pnts, bbox, sdist, iPnt)) {
if (flags == 0) {
return true;
}
if (sdist[0] < minDist) {
minDist = sdist[0];
x = iPnt.x;
y = iPnt.y;
z = iPnt.z;
if((flags & PickInfo.CLOSEST_GEOM_INFO) != 0) {
storeInterestData(pickInfo, flags, geom, geomIndex,
vtxIndexArr, iPnt, sdist[0]);
}
}
if((flags & PickInfo.ALL_GEOM_INFO) != 0) {
storeInterestData(pickInfo, flags, geom, geomIndex,
vtxIndexArr, iPnt, sdist[0]);
}
}
pnts[0].set(pnts[1]);
vtxIndexArr[0] = vtxIndexArr[1];
pnts[1].set(pnts[2]);
vtxIndexArr[1] = vtxIndexArr[2];
}
}
break;
case PickShape.PICKBOUNDINGSPHERE:
BoundingSphere bsphere = (BoundingSphere)
((PickBounds) pickShape).bounds;
while (i < stripVertexCounts.length) {
j = stripStartVertexIndices[i];
end = j + stripVertexCounts[i++];
for(int k=0; k<2; k++) {
vtxIndexArr[k] = j;
getVertexData(j++, pnts[k]);
}
while (j < end) {
vtxIndexArr[2] = j;
getVertexData(j++, pnts[2]);
if (intersectBoundingSphere(pnts, bsphere, sdist,
iPnt)) {
if (flags == 0) {
return true;
}
if (sdist[0] < minDist) {
minDist = sdist[0];
x = iPnt.x;
y = iPnt.y;
z = iPnt.z;
if((flags & PickInfo.CLOSEST_GEOM_INFO) != 0) {
storeInterestData(pickInfo, flags, geom, geomIndex,
vtxIndexArr, iPnt, sdist[0]);
}
}
if((flags & PickInfo.ALL_GEOM_INFO) != 0) {
storeInterestData(pickInfo, flags, geom, geomIndex,
vtxIndexArr, iPnt, sdist[0]);
}
}
pnts[0].set(pnts[1]);
vtxIndexArr[0] = vtxIndexArr[1];
pnts[1].set(pnts[2]);
vtxIndexArr[1] = vtxIndexArr[2];
}
}
break;
case PickShape.PICKBOUNDINGPOLYTOPE:
BoundingPolytope bpolytope = (BoundingPolytope)
((PickBounds) pickShape).bounds;
while (i < stripVertexCounts.length) {
j = stripStartVertexIndices[i];
end = j + stripVertexCounts[i++];
for(int k=0; k<2; k++) {
vtxIndexArr[k] = j;
getVertexData(j++, pnts[k]);
}
while (j < end) {
vtxIndexArr[2] = j;
getVertexData(j++, pnts[2]);
if (intersectBoundingPolytope(pnts, bpolytope,
sdist, iPnt)) {
if (flags == 0) {
return true;
}
if (sdist[0] < minDist) {
minDist = sdist[0];
x = iPnt.x;
y = iPnt.y;
z = iPnt.z;
if((flags & PickInfo.CLOSEST_GEOM_INFO) != 0) {
storeInterestData(pickInfo, flags, geom, geomIndex,
vtxIndexArr, iPnt, sdist[0]);
}
}
if((flags & PickInfo.ALL_GEOM_INFO) != 0) {
storeInterestData(pickInfo, flags, geom, geomIndex,
vtxIndexArr, iPnt, sdist[0]);
}
}
pnts[0].set(pnts[1]);
vtxIndexArr[0] = vtxIndexArr[1];
pnts[1].set(pnts[2]);
vtxIndexArr[1] = vtxIndexArr[2];
}
}
break;
case PickShape.PICKCYLINDER:
PickCylinder pickCylinder= (PickCylinder) pickShape;
while (i < stripVertexCounts.length) {
j = stripStartVertexIndices[i];
end = j + stripVertexCounts[i++];
for(int k=0; k<2; k++) {
vtxIndexArr[k] = j;
getVertexData(j++, pnts[k]);
}
while (j < end) {
vtxIndexArr[2] = j;
getVertexData(j++, pnts[2]);
if (intersectCylinder(pnts, pickCylinder, sdist, iPnt)) {
if (flags == 0) {
return true;
}
if (sdist[0] < minDist) {
minDist = sdist[0];
x = iPnt.x;
y = iPnt.y;
z = iPnt.z;
if((flags & PickInfo.CLOSEST_GEOM_INFO) != 0) {
storeInterestData(pickInfo, flags, geom, geomIndex,
vtxIndexArr, iPnt, sdist[0]);
}
}
if((flags & PickInfo.ALL_GEOM_INFO) != 0) {
storeInterestData(pickInfo, flags, geom, geomIndex,
vtxIndexArr, iPnt, sdist[0]);
}
}
pnts[0].set(pnts[1]);
vtxIndexArr[0] = vtxIndexArr[1];
pnts[1].set(pnts[2]);
vtxIndexArr[1] = vtxIndexArr[2];
}
}
break;
case PickShape.PICKCONE:
PickCone pickCone= (PickCone) pickShape;
while (i < stripVertexCounts.length) {
j = stripStartVertexIndices[i];
end = j + stripVertexCounts[i++];
for(int k=0; k<2; k++) {
vtxIndexArr[k] = j;
getVertexData(j++, pnts[k]);
}
while (j < end) {
vtxIndexArr[2] = j;
getVertexData(j++, pnts[2]);
if (intersectCone(pnts, pickCone, sdist, iPnt)) {
if (flags == 0) {
return true;
}
if (sdist[0] < minDist) {
minDist = sdist[0];
x = iPnt.x;
y = iPnt.y;
z = iPnt.z;
if((flags & PickInfo.CLOSEST_GEOM_INFO) != 0) {
storeInterestData(pickInfo, flags, geom, geomIndex,
vtxIndexArr, iPnt, sdist[0]);
}
}
if((flags & PickInfo.ALL_GEOM_INFO) != 0) {
storeInterestData(pickInfo, flags, geom, geomIndex,
vtxIndexArr, iPnt, sdist[0]);
}
}
pnts[0].set(pnts[1]);
vtxIndexArr[0] = vtxIndexArr[1];
pnts[1].set(pnts[2]);
vtxIndexArr[1] = vtxIndexArr[2];
}
}
break;
case PickShape.PICKPOINT:
// Should not happen since API already check for this
throw new IllegalArgumentException(J3dI18N.getString("TriangleStripArrayRetained0"));
default:
throw new RuntimeException ("PickShape not supported for intersection");
}
if (minDist < Double.MAX_VALUE) {
iPnt.x = x;
iPnt.y = y;
iPnt.z = z;
return true;
}
return false;
}
// intersect pnts[] with every triangle in this object
@Override
boolean intersect(Point3d[] pnts) {
int j, end;
Point3d[] points = new Point3d[3];
double dist[] = new double[1];
int i = 0;
points[0] = new Point3d();
points[1] = new Point3d();
points[2] = new Point3d();
switch (pnts.length) {
case 3: // Triangle
while (i < stripVertexCounts.length) {
j = stripStartVertexIndices[i];
end = j + stripVertexCounts[i++];
getVertexData(j++, points[0]);
getVertexData(j++, points[1]);
while (j < end) {
getVertexData(j++, points[2]);
if (intersectTriTri(points[0], points[1], points[2],
pnts[0], pnts[1], pnts[2])) {
return true;
}
points[0].set(points[1]);
points[1].set(points[2]);
}
}
break;
case 4: // Quad
while (i < stripVertexCounts.length) {
j = stripStartVertexIndices[i];
end = j + stripVertexCounts[i++];
getVertexData(j++, points[0]);
getVertexData(j++, points[1]);
while (j < end) {
getVertexData(j++, points[2]);
if (intersectTriTri(points[0], points[1], points[2],
pnts[0], pnts[1], pnts[2]) ||
intersectTriTri(points[0], points[1], points[2],
pnts[0], pnts[2], pnts[3])) {
return true;
}
points[0].set(points[1]);
points[1].set(points[2]);
}
}
break;
case 2: // Line
while (i < stripVertexCounts.length) {
j = stripStartVertexIndices[i];
end = j + stripVertexCounts[i++];
getVertexData(j++, points[0]);
getVertexData(j++, points[1]);
while (j < end) {
getVertexData(j++, points[2]);
if (intersectSegment(points, pnts[0], pnts[1],
dist, null)) {
return true;
}
points[0].set(points[1]);
points[1].set(points[2]);
}
}
break;
case 1: // Point
while (i < stripVertexCounts.length) {
j = stripStartVertexIndices[i];
end = j + stripVertexCounts[i++];
getVertexData(j++, points[0]);
getVertexData(j++, points[1]);
while (j < end) {
getVertexData(j++, points[2]);
if (intersectTriPnt(points[0], points[1], points[2],
pnts[0])) {
return true;
}
points[0].set(points[1]);
points[1].set(points[2]);
}
}
break;
}
return false;
}
@Override
boolean intersect(Transform3D thisToOtherVworld, GeometryRetained geom) {
int i = 0, j, end;
Point3d[] pnts = new Point3d[3];
pnts[0] = new Point3d();
pnts[1] = new Point3d();
pnts[2] = new Point3d();
while (i < stripVertexCounts.length) {
j = stripStartVertexIndices[i];
end = j + stripVertexCounts[i++];
getVertexData(j++, pnts[0]);
getVertexData(j++, pnts[1]);
thisToOtherVworld.transform(pnts[0]);
thisToOtherVworld.transform(pnts[1]);
while (j < end) {
getVertexData(j++, pnts[2]);
thisToOtherVworld.transform(pnts[2]);
if (geom.intersect(pnts)) {
return true;
}
pnts[0].set(pnts[1]);
pnts[1].set(pnts[2]);
}
}
return false;
}
// the bounds argument is already transformed
@Override
boolean intersect(Bounds targetBound) {
int i = 0;
int j, end;
Point3d[] pnts = new Point3d[3];
pnts[0] = new Point3d();
pnts[1] = new Point3d();
pnts[2] = new Point3d();
switch(targetBound.getPickType()) {
case PickShape.PICKBOUNDINGBOX:
BoundingBox box = (BoundingBox) targetBound;
while (i < stripVertexCounts.length) {
j = stripStartVertexIndices[i];
end = j + stripVertexCounts[i++];
getVertexData(j++, pnts[0]);
getVertexData(j++, pnts[1]);
while ( j < end) {
getVertexData(j++, pnts[2]);
if (intersectBoundingBox(pnts, box, null, null)) {
return true;
}
pnts[0].set(pnts[1]);
pnts[1].set(pnts[2]);
}
}
break;
case PickShape.PICKBOUNDINGSPHERE:
BoundingSphere bsphere = (BoundingSphere) targetBound;
while (i < stripVertexCounts.length) {
j = stripStartVertexIndices[i];
end = j + stripVertexCounts[i++];
getVertexData(j++, pnts[0]);
getVertexData(j++, pnts[1]);
while ( j < end) {
getVertexData(j++, pnts[2]);
if (intersectBoundingSphere(pnts, bsphere, null, null)) {
return true;
}
pnts[0].set(pnts[1]);
pnts[1].set(pnts[2]);
}
}
break;
case PickShape.PICKBOUNDINGPOLYTOPE:
BoundingPolytope bpolytope = (BoundingPolytope) targetBound;
while (i < stripVertexCounts.length) {
j = stripStartVertexIndices[i];
end = j + stripVertexCounts[i++];
getVertexData(j++, pnts[0]);
getVertexData(j++, pnts[1]);
while ( j < end) {
getVertexData(j++, pnts[2]);
if (intersectBoundingPolytope(pnts, bpolytope, null, null)) {
return true;
}
pnts[0].set(pnts[1]);
pnts[1].set(pnts[2]);
}
}
break;
default:
throw new RuntimeException("Bounds not supported for intersection "
+ targetBound);
}
return false;
}
// From Graphics Gems IV (pg5) and Graphics Gems II, Pg170
@Override
void computeCentroid() {
Point3d pnt0 = new Point3d();
Point3d pnt1 = new Point3d();
Point3d pnt2 = new Point3d();
Vector3d vec = new Vector3d();
Vector3d normal = new Vector3d();
Vector3d tmpvec = new Vector3d();
double area, totalarea = 0;
int end, replaceIndex, j, i = 0;
centroid.x = 0;
centroid.y = 0;
centroid.z = 0;
while( i < stripVertexCounts.length) {
j = stripStartVertexIndices[i];
end = j + stripVertexCounts[i++];
getVertexData(j++, pnt0);
getVertexData(j++, pnt1);
replaceIndex = 2;
while (j < end) {
area = 0;
switch (replaceIndex) {
case 0:
getVertexData(j++, pnt0);
replaceIndex = 1;
break;
case 1:
getVertexData(j++, pnt1);
replaceIndex = 2;
break;
default:
getVertexData(j++, pnt2);
replaceIndex = 0;
}
// Determine the normal
vec.sub(pnt0, pnt1);
tmpvec.sub(pnt1, pnt2);
// Do the cross product
normal.cross(vec, tmpvec);
normal.normalize();
// If a degenerate triangle, don't include
if (Double.isNaN(normal.x + normal.y + normal.z))
continue;
tmpvec.set(0,0,0);
// compute the area
getCrossValue(pnt0, pnt1, tmpvec);
getCrossValue(pnt1, pnt2, tmpvec);
getCrossValue(pnt2, pnt0, tmpvec);
area = normal.dot(tmpvec);
totalarea += area;
centroid.x += (pnt0.x + pnt1.x + pnt2.x) * area;
centroid.y += (pnt0.y + pnt1.y + pnt2.y) * area;
centroid.z += (pnt0.z + pnt1.z + pnt2.z) * area;
}
}
if (totalarea != 0.0) {
area = 1.0/(3.0 * totalarea);
centroid.x *= area;
centroid.y *= area;
centroid.z *= area;
}
}
@Override
int getClassType() {
return TRIANGLE_TYPE;
}
}