Examples with EqualizerConstraint easik.model.constraint.EqualizerConstraint used on opensource projects

Example 6 with EqualizerConstraint

use of easik.model.constraint.EqualizerConstraint in project fql by CategoricalData.

the class EntityNode method getShadowEdges.

/**
 * This method returns the edges that will be "shadowed" in this entity for
 * allowing various types of constraints. The problem arises when we have
 * something like: A -> B -> C, where A is the summand of B, but B has
 * to be specified. In this case, the B to C edge will be returned as a
 * "shadow" edge. We handle this for other constraint types, too. For a
 * good, working, technical example, see the shadowEdges.easik sample
 * sketch.
 *
 * @return a set of edges that will be shadowed by this entity node.
 *
 *         Removing shadow edges completely. Started by Sarah Van der Laan
 *         continued by Federico Mora because a partial solution is worse
 *         than all or nothing
 *
 *         public LinkedHashSet<SketchEdge> getShadowEdges() { return
 *         getShadowEdges(new LinkedHashSet<EntityNode>(5), new
 *         LinkedHashSet<SketchEdge>(5)); }
 */
// Package-only implementation of the above that breaks recursion by
// ignoring
// shadowed nodes that we already know about.
/**
 * @param ignore
 * @param constraintEdges
 *
 * @return
 */
LinkedHashSet<SketchEdge> getShadowEdges(final Collection<EntityNode> ignore, final LinkedHashSet<SketchEdge> constraintEdges) {
    // These are the other entity node that we (potentially) need to shadow:
    final Collection<EntityNode> shadow = new LinkedHashSet<>(10);
    CONSTRAINT: for (final ModelConstraint<SketchFrame, SketchGraphModel, Sketch, EntityNode, SketchEdge> c : getMModel().getConstraints().values()) {
        if (c instanceof SumConstraint) {
            final SumConstraint<SketchFrame, SketchGraphModel, Sketch, EntityNode, SketchEdge> s = (SumConstraint<SketchFrame, SketchGraphModel, Sketch, EntityNode, SketchEdge>) c;
            for (final ModelPath<SketchFrame, SketchGraphModel, Sketch, EntityNode, SketchEdge> path : s.getPaths()) {
                // for this entity, of course):
                if (path.getDomain() == this) {
                    shadow.addAll(path.getEntities());
                    constraintEdges.addAll(path.getEdges());
                    continue CONSTRAINT;
                }
            }
        } else if (c instanceof ProductConstraint) {
            final ProductConstraint<SketchFrame, SketchGraphModel, Sketch, EntityNode, SketchEdge> p = (ProductConstraint<SketchFrame, SketchGraphModel, Sketch, EntityNode, SketchEdge>) c;
            for (final ModelPath<SketchFrame, SketchGraphModel, Sketch, EntityNode, SketchEdge> path : p.getPaths()) {
                // codomains), along each product path
                if (path.getCoDomain() == this) {
                    for (final ModelPath<SketchFrame, SketchGraphModel, Sketch, EntityNode, SketchEdge> prodPath : p.getPaths()) {
                        // But we ignore all of the product path edges,
                        // since they will be automatically generated:
                        constraintEdges.addAll(prodPath.getEdges());
                        final Deque<EntityNode> pathNodes = new LinkedList<>();
                        pathNodes.addAll(prodPath.getEntities());
                        pathNodes.removeLast();
                        shadow.addAll(pathNodes);
                    }
                    continue CONSTRAINT;
                }
            }
        } else if (c instanceof EqualizerConstraint) {
            final EqualizerConstraint<SketchFrame, SketchGraphModel, Sketch, EntityNode, SketchEdge> e = (EqualizerConstraint<SketchFrame, SketchGraphModel, Sketch, EntityNode, SketchEdge>) c;
            // injective *edge* doesn't cause that problem).
            if (e.getSourceEntity() == this) {
                final ModelPath<SketchFrame, SketchGraphModel, Sketch, EntityNode, SketchEdge> projection = e.getProjection();
                shadow.addAll(projection.getEntities());
                // Ignore the projection edge itself:
                constraintEdges.addAll(projection.getEdges());
                continue CONSTRAINT;
            }
        } else if (c instanceof PullbackConstraint) {
            final PullbackConstraint<SketchFrame, SketchGraphModel, Sketch, EntityNode, SketchEdge> pb = (PullbackConstraint<SketchFrame, SketchGraphModel, Sketch, EntityNode, SketchEdge>) c;
            // WPBEDIT CF2012
            for (int i = 0; i < pb.getWidth(); i++) {
                ModelPath<SketchFrame, SketchGraphModel, Sketch, EntityNode, SketchEdge> proj = pb.getProjectionPath(i);
                if (this == proj.getCoDomain()) {
                    for (int j = 0; j < pb.getWidth(); j++) {
                        proj = pb.getProjectionPath(j);
                        Deque<EntityNode> projNodes = new LinkedList<>(proj.getEntities());
                        projNodes.removeLast();
                        shadow.addAll(projNodes);
                        constraintEdges.addAll(proj.getEdges());
                    }
                    continue CONSTRAINT;
                }
            }
        } else if (c instanceof LimitConstraint) {
        // TRIANGLES TODO CF2012 incomplete
        }
    }
    final LinkedHashSet<SketchEdge> shadowEdges = new LinkedHashSet<>(20);
    // All of the ignore entities, plus everything we just found should be
    // ignored by any recursion:
    final Collection<EntityNode> toIgnore = new LinkedHashSet<>(3);
    toIgnore.add(this);
    toIgnore.addAll(ignore);
    toIgnore.addAll(shadow);
    for (final EntityNode node : shadow) {
        // it:
        if ((node == this) || ignore.contains(node)) {
            continue;
        }
        // Otherwise, shadow its non-partial edges, and all of its shadow
        // edges:
        shadowEdges.addAll(node.getShadowEdges(toIgnore, constraintEdges));
        shadowEdges.addAll(node.getNonPartialEdges());
        // Remove edges already
        shadowEdges.removeAll(constraintEdges);
    // involved in the sum
    }
    return shadowEdges;
}