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/*
* Copyright (c) 2013, 2018, Oracle and/or its affiliates. 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. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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*/
package javafx.scene.shape;
import com.sun.javafx.geom.BaseBounds;
import com.sun.javafx.geom.PickRay;
import com.sun.javafx.geom.Vec3d;
import com.sun.javafx.geom.transform.BaseTransform;
import com.sun.javafx.scene.DirtyBits;
import com.sun.javafx.scene.NodeHelper;
import com.sun.javafx.scene.input.PickResultChooser;
import com.sun.javafx.scene.shape.CylinderHelper;
import com.sun.javafx.scene.shape.MeshHelper;
import com.sun.javafx.sg.prism.NGCylinder;
import com.sun.javafx.sg.prism.NGNode;
import javafx.beans.property.DoubleProperty;
import javafx.beans.property.SimpleDoubleProperty;
import javafx.geometry.Point2D;
import javafx.geometry.Point3D;
import javafx.scene.Node;
import javafx.scene.input.PickResult;
import javafx.scene.transform.Rotate;
/**
* The {@code Cylinder} class defines a 3 dimensional cylinder with the specified size.
* A {@code Cylinder} is a 3D geometry primitive created with a given radius and height.
* It is centered at the origin.
*
* @since JavaFX 8.0
*/
public class Cylinder extends Shape3D {
static {
// This is used by classes in different packages to get access to
// private and package private methods.
CylinderHelper.setCylinderAccessor(new CylinderHelper.CylinderAccessor() {
@Override
public NGNode doCreatePeer(Node node) {
return ((Cylinder) node).doCreatePeer();
}
@Override
public void doUpdatePeer(Node node) {
((Cylinder) node).doUpdatePeer();
}
@Override
public BaseBounds doComputeGeomBounds(Node node,
BaseBounds bounds, BaseTransform tx) {
return ((Cylinder) node).doComputeGeomBounds(bounds, tx);
}
@Override
public boolean doComputeContains(Node node, double localX, double localY) {
return ((Cylinder) node).doComputeContains(localX, localY);
}
@Override
public boolean doComputeIntersects(Node node, PickRay pickRay,
PickResultChooser pickResult) {
return ((Cylinder) node).doComputeIntersects(pickRay, pickResult);
}
});
}
static final int DEFAULT_DIVISIONS = 64;
static final double DEFAULT_RADIUS = 1;
static final double DEFAULT_HEIGHT = 2;
private int divisions = DEFAULT_DIVISIONS;
private TriangleMesh mesh;
{
// To initialize the class helper at the begining each constructor of this class
CylinderHelper.initHelper(this);
}
/**
* Creates a new instance of {@code Cylinder} of radius of 1.0 and height of 2.0.
* Resolution defaults to 15 divisions along X and Z axis.
*/
public Cylinder() {
this(DEFAULT_RADIUS, DEFAULT_HEIGHT, DEFAULT_DIVISIONS);
}
/**
* Creates a new instance of {@code Cylinder} of a given radius and height.
* Resolution defaults to 15 divisions along X and Z axis.
*
* @param radius Radius
* @param height Height
*/
public Cylinder (double radius, double height) {
this(radius, height, DEFAULT_DIVISIONS);
}
/**
* Creates a new instance of {@code Cylinder} of a given radius, height, and
* divisions. Resolution defaults to 15 divisions along X and Z axis.
*
* Note that divisions should be at least 3. Any value less than that will be
* clamped to 3.
*
* @param radius Radius
* @param height Height
* @param divisions Divisions
*/
public Cylinder (double radius, double height, int divisions) {
this.divisions = divisions < 3 ? 3 : divisions;
setRadius(radius);
setHeight(height);
}
/**
* Defines the height or the Y dimension of the Cylinder.
*
* @defaultValue 2.0
*/
private DoubleProperty height;
public final void setHeight(double value) {
heightProperty().set(value);
}
public final double getHeight() {
return height == null ? 2 : height.get();
}
public final DoubleProperty heightProperty() {
if (height == null) {
height = new SimpleDoubleProperty(Cylinder.this, "height", DEFAULT_HEIGHT) {
@Override
public void invalidated() {
NodeHelper.markDirty(Cylinder.this, DirtyBits.MESH_GEOM);
manager.invalidateCylinderMesh(key);
key = null;
NodeHelper.geomChanged(Cylinder.this);
}
};
}
return height;
}
/**
* Defines the radius in the Z plane of the Cylinder.
*
* @defaultValue 1.0
*/
private DoubleProperty radius;
public final void setRadius(double value) {
radiusProperty().set(value);
}
public final double getRadius() {
return radius == null ? 1 : radius.get();
}
public final DoubleProperty radiusProperty() {
if (radius == null) {
radius = new SimpleDoubleProperty(Cylinder.this, "radius", DEFAULT_RADIUS) {
@Override
public void invalidated() {
NodeHelper.markDirty(Cylinder.this, DirtyBits.MESH_GEOM);
manager.invalidateCylinderMesh(key);
key = null;
NodeHelper.geomChanged(Cylinder.this);
}
};
}
return radius;
}
/**
* Retrieves the divisions attribute use to generate this cylinder.
*
* @return the divisions attribute.
*/
public int getDivisions() {
return divisions;
}
/*
* Note: This method MUST only be called via its accessor method.
*/
private void doUpdatePeer() {
if (NodeHelper.isDirty(this, DirtyBits.MESH_GEOM)) {
final NGCylinder peer = NodeHelper.getPeer(this);
final float h = (float) getHeight();
final float r = (float) getRadius();
if (h < 0 || r < 0) {
peer.updateMesh(null);
} else {
if (key == null) {
key = new CylinderKey(h, r, divisions);
}
mesh = manager.getCylinderMesh(h, r, divisions, key);
mesh.updatePG();
peer.updateMesh(mesh.getPGTriangleMesh());
}
}
}
/*
* Note: This method MUST only be called via its accessor method.
*/
private NGNode doCreatePeer() {
return new NGCylinder();
}
/*
* Note: This method MUST only be called via its accessor method.
*/
private BaseBounds doComputeGeomBounds(BaseBounds bounds, BaseTransform tx) {
final float h = (float) getHeight();
final float r = (float) getRadius();
if (r < 0 || h < 0) {
return bounds.makeEmpty();
}
final float hh = h * 0.5f;
bounds = bounds.deriveWithNewBounds(-r, -hh, -r, r, hh, r);
bounds = tx.transform(bounds, bounds);
return bounds;
}
/*
* Note: This method MUST only be called via its accessor method.
*/
private boolean doComputeContains(double localX, double localY) {
double w = getRadius();
double hh = getHeight()*.5f;
return -w <= localX && localX <= w &&
-hh <= localY && localY <= hh;
}
/*
* Note: This method MUST only be called via its accessor method.
*/
private boolean doComputeIntersects(PickRay pickRay, PickResultChooser pickResult) {
final boolean exactPicking = divisions < DEFAULT_DIVISIONS && mesh != null;
final double r = getRadius();
final Vec3d dir = pickRay.getDirectionNoClone();
final double dirX = dir.x;
final double dirY = dir.y;
final double dirZ = dir.z;
final Vec3d origin = pickRay.getOriginNoClone();
final double originX = origin.x;
final double originY = origin.y;
final double originZ = origin.z;
final double h = getHeight();
final double halfHeight = h / 2.0;
final CullFace cullFace = getCullFace();
// Check the open cylinder first
// Coeficients of a quadratic equation desribing intersection with an infinite cylinder
final double a = dirX * dirX + dirZ * dirZ;
final double b = 2 * (dirX * originX + dirZ * originZ);
final double c = originX * originX + originZ * originZ - r * r;
final double discriminant = b * b - 4 * a * c;
double t0, t1, t = Double.POSITIVE_INFINITY;
final double minDistance = pickRay.getNearClip();
final double maxDistance = pickRay.getFarClip();
if (discriminant >= 0 && (dirX != 0.0 || dirZ != 0.0)) {
// the line hits the infinite cylinder
final double distSqrt = Math.sqrt(discriminant);
final double q = (b < 0) ? (-b - distSqrt) / 2.0 : (-b + distSqrt) / 2.0;
t0 = q / a;
t1 = c / q;
if (t0 > t1) {
double temp = t0;
t0 = t1;
t1 = temp;
}
// let's see if the hit is between clipping planes and within the cylinder's height
final double y0 = originY + t0 * dirY;
if (t0 < minDistance || y0 < -halfHeight || y0 > halfHeight || cullFace == CullFace.FRONT) {
final double y1 = originY + t1 * dirY;
if (t1 >= minDistance && t1 <= maxDistance && y1 >= -halfHeight && y1 <= halfHeight) {
if (cullFace != CullFace.BACK || exactPicking) {
// t0 is outside or behind but t1 hits.
// We need to do the exact picking even if the back wall
// is culled because the front facing triangles may
// still be in front of us
t = t1;
}
} // else no hit (but we need to check the caps)
} else if (t0 <= maxDistance) {
// t0 hits the height between clipping planes
t = t0;
} // else no hit (but we need to check the caps)
}
// Now check the caps
// if we already know we are going to do the exact picking,
// there is no need to check the caps
boolean topCap = false, bottomCap = false;
if (t == Double.POSITIVE_INFINITY || !exactPicking) {
final double tBottom = (-halfHeight - originY) / dirY;
final double tTop = (halfHeight - originY) / dirY;
boolean isT0Bottom = false;
if (tBottom < tTop) {
t0 = tBottom;
t1 = tTop;
isT0Bottom = true;
} else {
t0 = tTop;
t1 = tBottom;
}
if (t0 >= minDistance && t0 <= maxDistance && t0 < t && cullFace != CullFace.FRONT) {
final double tX = originX + dirX * t0;
final double tZ = originZ + dirZ * t0;
if (tX * tX + tZ * tZ <= r * r) {
bottomCap = isT0Bottom; topCap = !isT0Bottom;
t = t0;
}
}
if (t1 >= minDistance && t1 <= maxDistance && t1 < t && (cullFace != CullFace.BACK || exactPicking)) {
final double tX = originX + dirX * t1;
final double tZ = originZ + dirZ * t1;
if (tX * tX + tZ * tZ <= r * r) {
topCap = isT0Bottom; bottomCap = !isT0Bottom;
t = t1;
}
}
}
if (Double.isInfinite(t) || Double.isNaN(t)) {
// no hit
return false;
}
if (exactPicking) {
return MeshHelper.computeIntersects(mesh, pickRay, pickResult, this, cullFace, false);
}
if (pickResult != null && pickResult.isCloser(t)) {
final Point3D point = PickResultChooser.computePoint(pickRay, t);
Point2D txCoords;
if (topCap) {
txCoords = new Point2D(
0.5 + point.getX() / (2 * r),
0.5 + point.getZ() / (2 * r));
} else if (bottomCap) {
txCoords = new Point2D(
0.5 + point.getX() / (2 * r),
0.5 - point.getZ() / (2 * r));
} else {
final Point3D proj = new Point3D(point.getX(), 0, point.getZ());
final Point3D cross = proj.crossProduct(Rotate.Z_AXIS);
double angle = proj.angle(Rotate.Z_AXIS);
if (cross.getY() > 0) {
angle = 360 - angle;
}
txCoords = new Point2D(1 - angle / 360, 0.5 + point.getY() / h);
}
pickResult.offer(this, t, PickResult.FACE_UNDEFINED, point, txCoords);
}
return true;
}
static TriangleMesh createMesh(int div, float h, float r) {
// NOTE: still create mesh for degenerated cylinder
final int nPonits = div * 2 + 2;
final int tcCount = (div + 1) * 4 + 1; // 2 cap tex
final int faceCount = div * 4;
float textureDelta = 1.f / 256;
float dA = 1.f / div;
h *= .5f;
float points[] = new float[nPonits * 3];
float tPoints[] = new float[tcCount * 2];
int faces[] = new int[faceCount * 6];
int smoothing[] = new int[faceCount];
int pPos = 0, tPos = 0;
for (int i = 0; i < div; ++i) {
double a = dA * i * 2 * Math.PI;
points[pPos + 0] = (float) (Math.sin(a) * r);
points[pPos + 2] = (float) (Math.cos(a) * r);
points[pPos + 1] = h;
tPoints[tPos + 0] = 1 - dA * i;
tPoints[tPos + 1] = 1 - textureDelta;
pPos += 3; tPos += 2;
}
// top edge
tPoints[tPos + 0] = 0;
tPoints[tPos + 1] = 1 - textureDelta;
tPos += 2;
for (int i = 0; i < div; ++i) {
double a = dA * i * 2 * Math.PI;
points[pPos + 0] = (float) (Math.sin(a) * r);
points[pPos + 2] = (float) (Math.cos(a) * r);
points[pPos + 1] = -h;
tPoints[tPos + 0] = 1 - dA * i;
tPoints[tPos + 1] = textureDelta;
pPos += 3; tPos += 2;
}
// bottom edge
tPoints[tPos + 0] = 0;
tPoints[tPos + 1] = textureDelta;
tPos += 2;
// add cap central points
points[pPos + 0] = 0;
points[pPos + 1] = h;
points[pPos + 2] = 0;
points[pPos + 3] = 0;
points[pPos + 4] = -h;
points[pPos + 5] = 0;
pPos += 6;
// add cap central points
// bottom cap
for (int i = 0; i <= div; ++i) {
double a = (i < div) ? (dA * i * 2) * Math.PI: 0;
tPoints[tPos + 0] = (float) (Math.sin(a) * 0.5f) + 0.5f;
tPoints[tPos + 1] = (float) (Math.cos(a) * 0.5f) + 0.5f;
tPos += 2;
}
// top cap
for (int i = 0; i <= div; ++i) {
double a = (i < div) ? (dA * i * 2) * Math.PI: 0;
tPoints[tPos + 0] = 0.5f + (float) (Math.sin(a) * 0.5f);
tPoints[tPos + 1] = 0.5f - (float) (Math.cos(a) * 0.5f);
tPos += 2;
}
tPoints[tPos + 0] = .5f;
tPoints[tPos + 1] = .5f;
tPos += 2;
int fIndex = 0;
// build body faces
for (int p0 = 0; p0 < div; ++p0) {
int p1 = p0 + 1;
int p2 = p0 + div;
int p3 = p1 + div;
// add p0, p1, p2
faces[fIndex+0] = p0;
faces[fIndex+1] = p0;
faces[fIndex+2] = p2;
faces[fIndex+3] = p2 + 1;
faces[fIndex+4] = p1 == div ? 0 : p1;
faces[fIndex+5] = p1;
fIndex += 6;
// add p3, p2, p1
// *faces++ = SmFace(p3,p1,p2, p3,p1,p2, 1);
faces[fIndex+0] = p3 % div == 0 ? p3 - div : p3;
faces[fIndex+1] = p3 + 1;
faces[fIndex+2] = p1 == div ? 0 : p1;
faces[fIndex+3] = p1;
faces[fIndex+4] = p2;
faces[fIndex+5] = p2 + 1;
fIndex += 6;
}
// build cap faces
int tStart = (div + 1) * 2;
int t1 = (div + 1) * 4;
int p1 = div * 2;
// bottom cap
for (int p0 = 0; p0 < div; ++p0) {
int p2 = p0 + 1;
int t0 = tStart + p0;
int t2 = t0 + 1;
// add p0, p1, p2
faces[fIndex+0] = p0;
faces[fIndex+1] = t0;
faces[fIndex+2] = p2 == div ? 0 : p2;
faces[fIndex+3] = t2;
faces[fIndex+4] = p1;
faces[fIndex+5] = t1;
fIndex += 6;
}
p1 = div * 2 + 1;
tStart = (div + 1) * 3;
// top cap
for (int p0 = 0; p0 < div; ++p0) {
int p2 = p0 + 1 + div;
int t0 = tStart + p0;
int t2 = t0 + 1;
//*faces++ = SmFace(p0+div+1,p1,p2, t0,t1,t2, 2);
faces[fIndex+0] = p0 + div;
faces[fIndex+1] = t0;
faces[fIndex+2] = p1;
faces[fIndex+3] = t1;
faces[fIndex+4] = p2 % div == 0 ? p2 - div : p2;
faces[fIndex+5] = t2;
fIndex += 6;
}
for (int i = 0; i < div * 2; ++i) {
smoothing[i] = 1;
}
for (int i = div * 2; i < div * 4; ++i) {
smoothing[i] = 2;
}
TriangleMesh m = new TriangleMesh(true);
m.getPoints().setAll(points);
m.getTexCoords().setAll(tPoints);
m.getFaces().setAll(faces);
m.getFaceSmoothingGroups().setAll(smoothing);
return m;
}
private static class CylinderKey extends Key {
final double radius, height;
final int divisions;
private CylinderKey(double radius, double height, int divisions) {
this.radius = radius;
this.height = height;
this.divisions = divisions;
}
@Override
public int hashCode() {
long bits = 7L;
bits = 31L * bits + Double.doubleToLongBits(radius);
bits = 31L * bits + Double.doubleToLongBits(height);
bits = 31L * bits + divisions;
return Long.hashCode(bits);
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (!(obj instanceof CylinderKey)) {
return false;
}
CylinderKey other = (CylinderKey) obj;
if (divisions != other.divisions) {
return false;
}
if (Double.compare(radius, other.radius) != 0) {
return false;
}
if (Double.compare(height, other.height) != 0) {
return false;
}
return true;
}
}
}
