Examples with Point2d maspack.matrix.Point2d used on opensource projects

Example 1 with Point2d

use of maspack.matrix.Point2d in project artisynth_core by artisynth.

the class NURBSCurve2d method evalPoints.

/**
 * Returns a set of points evaluated along the curve at intervals which are
 * evenly spaced with respect to the curve parameter.
 *
 * @param npnts
 * number of points to create
 * @return array of evaluated points
 */
public Point2d[] evalPoints(int npnts) {
    Point2d[] pnts = new Point2d[npnts];
    Point3d pnt3 = new Point3d();
    if (npnts == 1) {
        eval(pnt3, myUstart);
        pnts[0] = new Point2d(pnt3.x, pnt3.y);
    }
    for (int i = 0; i < npnts; i++) {
        eval(pnt3, myUstart + (myUend - myUstart) * i / (npnts - 1));
        pnts[i] = new Point2d(pnt3.x, pnt3.y);
    }
    return pnts;
}

Example 2 with Point2d

use of maspack.matrix.Point2d in project artisynth_core by artisynth.

the class Intersector2d method intersectLineLine.

public int intersectLineLine(Point2d c1, Vector2d v1, Point2d c2, Vector2d v2, ArrayList<Point2d> points) {
    int nAdded = 0;
    Vector2d n1 = new Vector2d(-v1.y, v1.x);
    Vector2d n2 = new Vector2d(-v2.y, v2.x);
    n1.normalize();
    n2.normalize();
    double b1 = c1.dot(n1);
    double b2 = c2.dot(n2);
    // denominator, if zero lines are parallel
    double d = n1.x * n2.y - n1.y * n2.x;
    if (Math.abs(d) < epsilon) {
        d = n1.dot(c2) - b1;
        // distance of c2 to line 1
        d = d / n1.norm();
        if (Math.abs(d) < epsilon) {
            // lines are colinear, so add both
            // add both points
            points.add(c1);
            points.add(c2);
            nAdded = 2;
        } else {
            nAdded = 0;
        }
    } else {
        double x = (n2.y * b1 - n1.y * b2) / d;
        double y = (-n2.x * b1 + n1.x * b2) / d;
        points.add(new Point2d(x, y));
        nAdded++;
    }
    return nAdded;
}

Example 3 with Point2d

use of maspack.matrix.Point2d in project artisynth_core by artisynth.

the class TriangleTessellator method getPoints.

/**
 * The final 2D points in the tessellation
 * @return 2D points
 */
public Point2d[] getPoints() {
    double[] coords = getPointCoords();
    int nump = coords.length / 2;
    Point2d[] pnts = new Point2d[nump];
    for (int i = 0; i < nump; i++) {
        pnts[i] = new Point2d(coords[2 * i], coords[2 * i + 1]);
    }
    return pnts;
}

Example 4 with Point2d

use of maspack.matrix.Point2d in project artisynth_core by artisynth.

the class DicomPlaneTextureContent method getTextureCoordinates.

/**
 * Texture coordinates, starting with the
 * bottom-left corner and working around clockwise.
 *
 * @return texture coordinates
 */
public Point2d[] getTextureCoordinates() {
    Point2d[] out = new Point2d[4];
    int w = res.x - 1;
    int h = res.y - 1;
    double tx1 = (double) rect.x() / w;
    double tx2 = ((double) rect.x() + rect.width() - 1) / w;
    double ty1 = (double) rect.y() / h;
    double ty2 = ((double) rect.y() + rect.height() - 1) / h;
    out[0] = new Point2d(tx1, ty1);
    out[1] = new Point2d(tx1, ty2);
    out[2] = new Point2d(tx2, ty2);
    out[3] = new Point2d(tx2, ty1);
    return out;
}

Example 5 with Point2d

use of maspack.matrix.Point2d in project artisynth_core by artisynth.

the class DicomTextureContent method getTextureCoordinates.

/**
 * Texture coordinates for a given plane ({@link #COL_ROW_PLANE},
 * {@link #ROW_SLICE_PLANE}, or {@link #COL_SLICE_PLANE}), starting with the
 * bottom-left corner and working around clockwise.
 *
 * @return texture coordinates
 */
public Point2d[] getTextureCoordinates(int plane) {
    Point2d[] out = new Point2d[4];
    Rectangle rect = rects[plane];
    int w = textureWidth - 1;
    int h = textureHeight - 1;
    double tx1 = (double) rect.x() / w;
    double tx2 = ((double) rect.x() + rect.width() - 1) / w;
    double ty1 = (double) rect.y() / h;
    double ty2 = ((double) rect.y() + rect.height() - 1) / h;
    out[0] = new Point2d(tx1, ty1);
    out[1] = new Point2d(tx1, ty2);
    out[2] = new Point2d(tx2, ty2);
    out[3] = new Point2d(tx2, ty1);
    return out;
}