Examples with Point org.poly2tri.geometry.primitives.Point used on opensource projects

Example 6 with Point

use of org.poly2tri.geometry.primitives.Point in project energy3d by concord-consortium.

the class MeshLib method fillMeshWithPolygon.

// private static boolean isAlmost180(final ReadOnlyVector3 p1, final ReadOnlyVector3 p2, final ReadOnlyVector3 p3) {
// return Math.abs(p1.subtract(p2, null).normalizeLocal().smallestAngleBetween(p3.subtract(p1, null).normalizeLocal())) > Math.PI - Math.PI / 180.0;
// }
public static void fillMeshWithPolygon(final Mesh mesh, final PolygonWithHoles polygon, final CoordinateTransform fromXY, final boolean generateNormals, final TPoint o, final TPoint u, final TPoint v, final boolean isWall) {
    /* round all points */
    for (final Point p : polygon.getPoints()) {
        p.set(Util.round(p.getX()), Util.round(p.getY()), Util.round(p.getZ()));
    }
    if (polygon.getHoles() != null) {
        for (final Polygon hole : polygon.getHoles()) {
            for (final Point p : hole.getPoints()) {
                p.set(Util.round(p.getX()), Util.round(p.getY()), Util.round(p.getZ()));
            }
        }
    }
    /* remove holes that collide with polygon or other holes */
    if (polygon.getHoles() != null) {
        // ensure polygon doesn't collide with holes
        final Path2D polygonPath = Util.makePath2D(polygon.getPoints());
        final Map<Polygon, Object> skipHoles = new HashMap<Polygon, Object>();
        for (final Polygon hole : polygon.getHoles()) {
            for (final Point p : hole.getPoints()) {
                if (!polygonPath.contains(new Point2D.Double(p.getX(), p.getY()))) {
                    skipHoles.put(hole, null);
                    break;
                }
            }
        }
        // ensure holes don't collide with each other
        for (int i = 0; i < polygon.getHoles().size(); i++) {
            final Polygon hole1 = polygon.getHoles().get(i);
            if (skipHoles.containsKey(hole1)) {
                continue;
            }
            for (int j = i + 1; j < polygon.getHoles().size(); j++) {
                final Polygon hole2 = polygon.getHoles().get(j);
                if (skipHoles.containsKey(hole2)) {
                    continue;
                }
                boolean found = false;
                for (final Point p : hole2.getPoints()) {
                    if (Util.insidePolygon(p, hole1.getPoints())) {
                        skipHoles.put(hole2, null);
                        found = true;
                        break;
                    }
                }
                if (!found) {
                    final int n1 = hole1.getPoints().size();
                    for (int i1 = 0; i1 < n1; i1++) {
                        final Point l1p1 = hole1.getPoints().get(i1);
                        final Point l1p2 = hole1.getPoints().get((i1 + 1) % n1);
                        final Line2D line1 = new Line2D.Double(l1p1.getX(), l1p1.getY(), l1p2.getX(), l1p2.getY());
                        found = false;
                        final int n2 = hole2.getPoints().size();
                        for (int i2 = 0; i2 < n2; i2++) {
                            final Point l2p1 = hole2.getPoints().get(i2);
                            final Point l2p2 = hole2.getPoints().get((i2 + 1) % n2);
                            final Line2D line2 = new Line2D.Double(l2p1.getX(), l2p1.getY(), l2p2.getX(), l2p2.getY());
                            if (line2.intersectsLine(line1)) {
                                skipHoles.put(hole2, null);
                                found = true;
                                break;
                            }
                        }
                        if (found) {
                            break;
                        }
                    }
                }
            }
        }
        for (final Polygon hole : skipHoles.keySet()) {
            polygon.getHoles().remove(hole);
        }
    }
    try {
        Poly2Tri.triangulate(polygon);
        if (fromXY == null) {
            ArdorMeshMapper.updateTriangleMesh(mesh, polygon);
        } else {
            ArdorMeshMapper.updateTriangleMesh(mesh, polygon, fromXY);
        }
        if (generateNormals) {
            if (fromXY == null) {
                ArdorMeshMapper.updateFaceNormals(mesh, polygon.getTriangles());
            } else {
                ArdorMeshMapper.updateFaceNormals(mesh, polygon.getTriangles(), fromXY);
            }
        }
        if (o != null) {
            ArdorMeshMapper.updateTextureCoordinates(mesh, polygon.getTriangles(), 1.0, o, u, v);
        }
        mesh.getMeshData().updateVertexCount();
        mesh.updateModelBound();
    } catch (final RuntimeException e) {
        System.err.println("Points:");
        for (final Point p : polygon.getPoints()) {
            System.err.println(p);
        }
        System.err.println("Holes:");
        if (polygon.getHoles() != null) {
            for (final Polygon hole : polygon.getHoles()) {
                for (final Point p : hole.getPoints()) {
                    System.err.println(p);
                }
            }
        }
        throw e;
    }
}

Example 7 with Point

use of org.poly2tri.geometry.primitives.Point in project energy3d by concord-consortium.

the class Util method snapToPolygon.

public static Vector2 snapToPolygon(final ReadOnlyVector3 point, final List<ReadOnlyVector3> polygon, final List<ReadOnlyVector3> wallNormals) {
    final Vector2 p = new Vector2(point.getX(), point.getY());
    final Vector2 l1 = new Vector2();
    final Vector2 l2 = new Vector2();
    double shortestDistance = Double.MAX_VALUE;
    Vector2 closestPoint = null;
    ReadOnlyVector3 closestNormal = null;
    final int n = polygon.size();
    for (int i = 0; i < n; i++) {
        final ReadOnlyVector3 pp1 = polygon.get(i);
        l1.set(pp1.getX(), pp1.getY());
        final ReadOnlyVector3 pp2 = polygon.get((i + 1) % n);
        l2.set(pp2.getX(), pp2.getY());
        if (l1.distanceSquared(l2) > MathUtils.ZERO_TOLERANCE) {
            final Vector2 pointOnLine = projectPointOnLine(p, l1, l2, true);
            final double distance = pointOnLine.distanceSquared(p);
            if (distance < shortestDistance) {
                shortestDistance = distance;
                closestPoint = pointOnLine;
                if (wallNormals != null) {
                    if (l1.distanceSquared(closestPoint) <= l2.distanceSquared(pointOnLine)) {
                        closestNormal = wallNormals.get(i);
                    } else {
                        closestNormal = wallNormals.get((i + 1) % n);
                    }
                }
            }
        }
    }
    if (wallNormals != null) {
        closestPoint.addLocal(-closestNormal.getX() / 100.0, -closestNormal.getY() / 100.0);
    }
    return closestPoint;
}

Example 8 with Point

use of org.poly2tri.geometry.primitives.Point in project energy3d by concord-consortium.

the class Util method makePath2D.

public static Path2D makePath2D(final List<? extends Point> polygon) {
    final Path2D path = new Path2D.Double();
    path.moveTo(polygon.get(0).getX(), polygon.get(0).getY());
    for (int i = 1; i < polygon.size(); i++) {
        final Point point = polygon.get(i);
        path.lineTo(point.getX(), point.getY());
    }
    path.closePath();
    return path;
}

Example 9 with Point

use of org.poly2tri.geometry.primitives.Point in project energy3d by concord-consortium.

the class SolarRadiation method computeOnSolarPanel.

// a solar panel typically has 6x10 cells, 6 and 10 are not power of 2 for texture. so we need some special handling here
private void computeOnSolarPanel(final int minute, final ReadOnlyVector3 directionTowardSun, final SolarPanel panel) {
    if (panel.getTracker() != SolarPanel.NO_TRACKER) {
        final Calendar calendar = Heliodon.getInstance().getCalendar();
        calendar.set(Calendar.HOUR_OF_DAY, (int) ((double) minute / (double) SolarRadiation.MINUTES_OF_DAY * 24.0));
        calendar.set(Calendar.MINUTE, minute % 60);
        panel.draw();
    }
    final ReadOnlyVector3 normal = panel.getNormal();
    if (normal == null) {
        throw new RuntimeException("Normal is null");
    }
    int nx = Scene.getInstance().getSolarPanelNx();
    int ny = Scene.getInstance().getSolarPanelNy();
    final Mesh drawMesh = panel.getRadiationMesh();
    final Mesh collisionMesh = (Mesh) panel.getRadiationCollisionSpatial();
    MeshDataStore data = onMesh.get(drawMesh);
    if (data == null) {
        data = initMeshTextureDataOnRectangle(drawMesh, nx, ny);
    }
    final ReadOnlyVector3 offset = directionTowardSun.multiply(1, null);
    final double dot = normal.dot(directionTowardSun);
    double directRadiation = 0;
    if (dot > 0) {
        directRadiation += calculateDirectRadiation(directionTowardSun, normal);
    }
    final double indirectRadiation = calculateDiffuseAndReflectedRadiation(directionTowardSun, normal);
    final FloatBuffer vertexBuffer = drawMesh.getMeshData().getVertexBuffer();
    // (0, 0)
    final Vector3 p0 = new Vector3(vertexBuffer.get(3), vertexBuffer.get(4), vertexBuffer.get(5));
    // (1, 0)
    final Vector3 p1 = new Vector3(vertexBuffer.get(6), vertexBuffer.get(7), vertexBuffer.get(8));
    // (0, 1)
    final Vector3 p2 = new Vector3(vertexBuffer.get(0), vertexBuffer.get(1), vertexBuffer.get(2));
    // this is the longer side (supposed to be y)
    final double d10 = p1.distance(p0);
    // this is the shorter side (supposed to be x)
    final double d20 = p2.distance(p0);
    final Vector3 p10 = p1.subtract(p0, null).normalizeLocal();
    final Vector3 p20 = p2.subtract(p0, null).normalizeLocal();
    // generate the heat map first. this doesn't affect the energy calculation, it just shows the distribution of solar radiation on the panel.
    // x and y must be swapped to have correct heat map texture, because nx represents rows and ny columns as we call initMeshTextureDataOnRectangle(mesh, nx, ny)
    double xSpacing = d10 / nx;
    double ySpacing = d20 / ny;
    Vector3 u = p10;
    Vector3 v = p20;
    final int iMinute = minute / Scene.getInstance().getTimeStep();
    for (int x = 0; x < nx; x++) {
        for (int y = 0; y < ny; y++) {
            if (EnergyPanel.getInstance().isCancelled()) {
                throw new CancellationException();
            }
            final Vector3 u2 = u.multiply(xSpacing * (x + 0.5), null);
            final Vector3 v2 = v.multiply(ySpacing * (y + 0.5), null);
            final ReadOnlyVector3 p = drawMesh.getWorldTransform().applyForward(p0.add(v2, null).addLocal(u2)).addLocal(offset);
            final Ray3 pickRay = new Ray3(p, directionTowardSun);
            // assuming that indirect (ambient or diffuse) radiation can always reach a grid point
            double radiation = indirectRadiation;
            if (dot > 0) {
                final PickResults pickResults = new PrimitivePickResults();
                for (final Spatial spatial : collidables) {
                    if (spatial != collisionMesh) {
                        PickingUtil.findPick(spatial, pickRay, pickResults, false);
                        if (pickResults.getNumber() != 0) {
                            break;
                        }
                    }
                }
                if (pickResults.getNumber() == 0) {
                    radiation += directRadiation;
                }
            }
            data.dailySolarIntensity[x][y] += radiation;
        }
    }
    if (panel.isRotated()) {
        // landscape
        nx = panel.getNumberOfCellsInY();
        ny = panel.getNumberOfCellsInX();
    } else {
        // portrait
        nx = panel.getNumberOfCellsInX();
        ny = panel.getNumberOfCellsInY();
    }
    // nx*ny*60: nx*ny is to get the unit cell area of the nx*ny grid; 60 is to convert the unit of timeStep from minute to kWh
    final double a = panel.getPanelWidth() * panel.getPanelHeight() * Scene.getInstance().getTimeStep() / (nx * ny * 60.0);
    // swap the x and y back to correct order
    xSpacing = d20 / nx;
    ySpacing = d10 / ny;
    u = p20;
    v = p10;
    if (cellOutputs == null || cellOutputs.length != nx || cellOutputs[0].length != ny) {
        cellOutputs = new double[nx][ny];
    }
    // calculate the solar radiation first without worrying about the underlying cell wiring and distributed efficiency
    for (int x = 0; x < nx; x++) {
        for (int y = 0; y < ny; y++) {
            if (EnergyPanel.getInstance().isCancelled()) {
                throw new CancellationException();
            }
            final Vector3 u2 = u.multiply(xSpacing * (x + 0.5), null);
            final Vector3 v2 = v.multiply(ySpacing * (y + 0.5), null);
            final ReadOnlyVector3 p = drawMesh.getWorldTransform().applyForward(p0.add(v2, null).addLocal(u2)).addLocal(offset);
            final Ray3 pickRay = new Ray3(p, directionTowardSun);
            // assuming that indirect (ambient or diffuse) radiation can always reach a grid point
            double radiation = indirectRadiation;
            if (dot > 0) {
                final PickResults pickResults = new PrimitivePickResults();
                for (final Spatial spatial : collidables) {
                    if (spatial != collisionMesh) {
                        PickingUtil.findPick(spatial, pickRay, pickResults, false);
                        if (pickResults.getNumber() != 0) {
                            break;
                        }
                    }
                }
                if (pickResults.getNumber() == 0) {
                    radiation += directRadiation;
                }
            }
            cellOutputs[x][y] = radiation * a;
        }
    }
    final double airTemperature = Weather.getInstance().getOutsideTemperatureAtMinute(dailyAirTemperatures[1], dailyAirTemperatures[0], minute);
    double syseff;
    double output;
    // cell temperature
    double tcell;
    // Tcell = Tair + (NOCT - 20) / 80 * R, where the unit of R is mW/cm^2
    final double noctFactor = (panel.getNominalOperatingCellTemperature() - 20.0) * 100.0 / (a * 80.0);
    // now consider cell wiring and distributed efficiency (Nice demo at: https://www.youtube.com/watch?v=UNPJapaZlCU)
    switch(panel.getShadeTolerance()) {
        case // the most ideal assumption that probably doesn't exist in reality (just keep it here in case someone has a breakthrough in the future)
        SolarPanel.HIGH_SHADE_TOLERANCE:
            for (int x = 0; x < nx; x++) {
                for (int y = 0; y < ny; y++) {
                    output = cellOutputs[x][y];
                    tcell = airTemperature + output * noctFactor;
                    syseff = panel.getSystemEfficiency(tcell);
                    panel.getSolarPotential()[iMinute] += output * syseff;
                }
            }
            break;
        case // all the cells are connected in a single series, so the total output is (easily) determined by the minimum
        SolarPanel.NO_SHADE_TOLERANCE:
            double min = Double.MAX_VALUE;
            for (int x = 0; x < nx; x++) {
                for (int y = 0; y < ny; y++) {
                    output = cellOutputs[x][y];
                    tcell = airTemperature + output * noctFactor;
                    syseff = panel.getSystemEfficiency(tcell);
                    output *= syseff;
                    if (output < min) {
                        min = output;
                    }
                }
            }
            panel.getSolarPotential()[iMinute] += min * ny * nx;
            break;
        case // assuming each panel uses a diode bypass to connect two columns of cells
        SolarPanel.PARTIAL_SHADE_TOLERANCE:
            min = Double.MAX_VALUE;
            if (panel.isRotated()) {
                // landscape: nx = 10, ny = 6
                for (int y = 0; y < ny; y++) {
                    if (y % 2 == 0) {
                        // reset min every two columns of cells
                        min = Double.MAX_VALUE;
                    }
                    for (int x = 0; x < nx; x++) {
                        output = cellOutputs[x][y];
                        tcell = airTemperature + output * noctFactor;
                        syseff = panel.getSystemEfficiency(tcell);
                        output *= syseff;
                        if (output < min) {
                            min = output;
                        }
                    }
                    if (y % 2 == 1) {
                        panel.getSolarPotential()[iMinute] += min * nx * 2;
                    }
                }
            } else {
                // portrait: nx = 6, ny = 10
                for (int x = 0; x < nx; x++) {
                    if (x % 2 == 0) {
                        // reset min every two columns of cells
                        min = Double.MAX_VALUE;
                    }
                    for (int y = 0; y < ny; y++) {
                        output = cellOutputs[x][y];
                        tcell = airTemperature + output * noctFactor;
                        syseff = panel.getSystemEfficiency(tcell);
                        output *= syseff;
                        if (output < min) {
                            min = output;
                        }
                    }
                    if (x % 2 == 1) {
                        panel.getSolarPotential()[iMinute] += min * ny * 2;
                    }
                }
            }
            break;
    }
}

Example 10 with Point

use of org.poly2tri.geometry.primitives.Point in project energy3d by concord-consortium.

the class SolarRadiation method computeOnSensor.

private void computeOnSensor(final int minute, final ReadOnlyVector3 directionTowardSun, final Sensor sensor) {
    final int nx = 2, ny = 2;
    // nx*ny*60: nx*ny is to get the unit cell area of the nx*ny grid; 60 is to convert the unit of timeStep from minute to kWh
    final double a = Sensor.WIDTH * Sensor.HEIGHT * Scene.getInstance().getTimeStep() / (nx * ny * 60.0);
    final ReadOnlyVector3 normal = sensor.getNormal();
    if (normal == null) {
        throw new RuntimeException("Normal is null");
    }
    final Mesh drawMesh = sensor.getRadiationMesh();
    final Mesh collisionMesh = (Mesh) sensor.getRadiationCollisionSpatial();
    MeshDataStore data = onMesh.get(drawMesh);
    if (data == null) {
        data = initMeshTextureDataOnRectangle(drawMesh, nx, ny);
    }
    final ReadOnlyVector3 offset = directionTowardSun.multiply(1, null);
    final double dot = normal.dot(directionTowardSun);
    double directRadiation = 0;
    if (dot > 0) {
        directRadiation += calculateDirectRadiation(directionTowardSun, normal);
    }
    final double indirectRadiation = calculateDiffuseAndReflectedRadiation(directionTowardSun, normal);
    final FloatBuffer vertexBuffer = drawMesh.getMeshData().getVertexBuffer();
    // (0, 0)
    final Vector3 p0 = new Vector3(vertexBuffer.get(3), vertexBuffer.get(4), vertexBuffer.get(5));
    // (1, 0)
    final Vector3 p1 = new Vector3(vertexBuffer.get(6), vertexBuffer.get(7), vertexBuffer.get(8));
    // (0, 1)
    final Vector3 p2 = new Vector3(vertexBuffer.get(0), vertexBuffer.get(1), vertexBuffer.get(2));
    // this is the longer side (supposed to be y)
    final Vector3 u = p1.subtract(p0, null).normalizeLocal();
    // this is the shorter side (supposed to be x)
    final Vector3 v = p2.subtract(p0, null).normalizeLocal();
    // x and y must be swapped to have correct heat map texture, because nx represents rows and ny columns as we call initMeshTextureDataOnRectangle(mesh, nx, ny)
    final double xSpacing = p1.distance(p0) / nx;
    final double ySpacing = p2.distance(p0) / ny;
    final int iMinute = minute / Scene.getInstance().getTimeStep();
    for (int x = 0; x < nx; x++) {
        for (int y = 0; y < ny; y++) {
            if (EnergyPanel.getInstance().isCancelled()) {
                throw new CancellationException();
            }
            final Vector3 u2 = u.multiply(xSpacing * (x + 0.5), null);
            final Vector3 v2 = v.multiply(ySpacing * (y + 0.5), null);
            final ReadOnlyVector3 p = drawMesh.getWorldTransform().applyForward(p0.add(v2, null).addLocal(u2)).addLocal(offset);
            final Ray3 pickRay = new Ray3(p, directionTowardSun);
            // assuming that indirect (ambient or diffuse) radiation can always reach a grid point
            double radiation = indirectRadiation;
            if (dot > 0) {
                final PickResults pickResults = new PrimitivePickResults();
                for (final Spatial spatial : collidables) {
                    if (spatial != collisionMesh) {
                        PickingUtil.findPick(spatial, pickRay, pickResults, false);
                        if (pickResults.getNumber() != 0) {
                            break;
                        }
                    }
                }
                if (pickResults.getNumber() == 0) {
                    radiation += directRadiation;
                }
            }
            data.dailySolarIntensity[x][y] += radiation;
            sensor.getSolarPotential()[iMinute] += radiation * a;
        }
    }
}