Examples of Vector2

aspect.util.Vector2
A vector quantity with 2 components. This class also contains static utility methods for performing mathematical operations on 2-component vectors. Instances are mutable, so copy() should be used whenever a separate copy is needed. @author MillerV
be.demmel.jgws.packets.Vector2
ca.eandb.jmist.math.Vector2
The difference between two points in two dimensional space. This class is immutable. @author Brad Kimmel
com.ardor3d.math.Vector2
Vector2 represents a point or vector in a two dimensional system. This implementation stores its data in double-precision.
com.badlogic.gdx.math.Vector2
Encapsulates a 2D vector. Allows chaining methods by returning a reference to itself @author badlogicgames@gmail.com
com.forgeessentials.util.vector.Vector2
com.ngt.jopenmetaverse.shared.types.Vector2
gwlpr.protocol.util.Vector2
A 2 dimensional vector. @author _rusty
gwt.g2d.client.math.Vector2
gwt.g2d.shared.math.Vector2
Represents a 2D point or vector. @author hao1300@gmail.com
micdoodle8.mods.galacticraft.api.vector.Vector2
Vector2 Class is used for defining objects in a 2D space. @author Calclavia
mikera.vectorz.Vector2
Specialised 2D vector @author Mike
org.bitbucket.kchau.longshot.util.Vector2
org.cmj.flowy.simulation.math.Vector2
Simple 2-Dimensional vector class. @author Chris Martin
org.graphstream.ui.geom.Vector2
universalelectricity.api.vector.Vector2
Vector2 Class is used for defining objects in a 2D space. @author Calclavia
wecui.util.Vector2
A 2-dimensional vector represented by float-precision x,y coordinates Note, this is the Immutable form of Vector2. All operations will construct a new Vector2.

Examples of mikera.vectorz.Vector2

     * If the eigenvalues are all known, real, and the same this can be used to check them.
     */
    public void testEigenvalues( SymmetricQRAlgorithmDecomposition alg , double expected ) {


        for( int i = 0; i < alg.getNumberOfEigenvalues(); i++ ) {
            Vector2 c = alg.getEigenvalue(i);


            assertTrue(c.y==0);


            assertEquals(expected,c.x,1e-8);
        }

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Examples of org.bitbucket.kchau.longshot.util.Vector2

  
  public MovableObject()
  {
    /** Default MovableObject has allocated velocity and accel
     * vectors with a position of 0,0.*/
    velocity = new Vector2();
    acceleration = new Vector2();
    this.x = 0;
    this.y = 0;
  }

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Examples of org.cmj.flowy.simulation.math.Vector2

    /**
     * Updates the pressures and densities of all particles in the supplied list.
     * @param particles The particles whose densities and pressures are to be updated.
     */
    private void updatePressureAndDensities(final List<FluidParticle> particles) {
        final Vector2 distance = new Vector2();
        for (int i = particles.size() - 1; i >= 0; --i) {
            final FluidParticle particle = particles.get(i);
            particle.density = 0.0f;
            final List<Integer> neighbours = theGrid.GetNeighbourIndex(particle);
            for (int j = neighbours.size()-1; j>=0; --j  ) {

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Examples of org.cmj.flowy.simulation.math.Vector2

    private void updateForces(final List<FluidParticle> particles, final Vector2 globalForce) {
        
        // Optimise slightly by precomputing a few things needed in our calculations. 
        final float halfMass = Constants.PARTICLE_MASS / 2.0f;
        final float massViscosityProduct = Constants.PARTICLE_MASS * theViscosity;
        final Vector2 distance = new Vector2();


        for (int i = particles.size()-1; i >= 0 ; --i) {


            final FluidParticle particle = particles.get(i);


            // Add global force to every particle
            particle.force.add(globalForce);


            // Get neighbours for each of the particles
            final List<Integer> neighbours = theGrid.GetNeighbourIndex(particle);


            for (final int neighbourIndex : neighbours) {


                // Prevent double tests
                if (neighbourIndex > i) {


                    final FluidParticle neighbour = particles.get(neighbourIndex);


                    if (neighbour.density > Constants.FLOAT_EPSILON) {


                        distance.x = particle.position.x - neighbour.position.x;
                        distance.y = particle.position.y - neighbour.position.y;


                        // Pressure
                        float scalar = halfMass * (particle.pressure + neighbour.pressure) / neighbour.density;


                        Vector2 force = theSKPressure.CalculateGradient(distance);
                        force.multiply(scalar);
                        particle.force.subtract(force);
                        neighbour.force.add(force);


                        // Viscosity
                        scalar = massViscosityProduct * theSKViscosity.CalculateLaplacian(distance)
                                 / neighbour.density;


                        force = Vector2.Subtract(neighbour.velocity, particle.velocity);


                        force.multiply(scalar);


                        particle.force.add(force);
                        neighbour.force.subtract(force);       
                    }
                }

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Examples of org.cmj.flowy.simulation.math.Vector2

     */
    private void checkParticleDistance(final List<FluidParticle> particles) {
        final float minDist = 0.5f * theCellSpacing;
        final float minDistSq = minDist * minDist;


        final Vector2 particleSeparation = new Vector2();


        for (int i = particles.size() -1; i >=0; --i) {


            final FluidParticle particle = particles.get(i);


            final List<Integer> neighbours = theGrid.GetNeighbourIndex(particle);


            for (int j=neighbours.size()-1; j>=0; --j) {
                final int neighbourIndex = neighbours.get(j);
                // Prevent double tests
                if (neighbourIndex > i) {
                    final FluidParticle neighbour = particles.get(neighbourIndex);
                    particleSeparation.x = neighbour.position.x - particle.position.x;
                    particleSeparation.y = neighbour.position.y - particle.position.y;
                    final float particleSeparationSquared = particleSeparation.getLengthSqaured();
                    if (particleSeparationSquared < minDistSq) {
                        if (particleSeparationSquared > Constants.FLOAT_EPSILON) {
                            final float distLen = particleSeparation.getLength();
                            particleSeparation.multiply(0.5f * (distLen - minDist) / distLen);
                            neighbour.position.subtract(particleSeparation);
                            neighbour.oldPosition.subtract(particleSeparation);
                            particle.position.add(particleSeparation);
                            particle.oldPosition.add(particleSeparation);
                        }

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Examples of org.cmj.flowy.simulation.math.Vector2


        final int particlesToEmit = Constants.NUMBER_OF_PARTICLES;


        for (int i = 0; i < particlesToEmit; ++i) {


            final Vector2 particleVelocity = getEmittedParticleVelocity();


            final Vector2 particlePosition = new Vector2(thePosition.x, thePosition.y);


            // Calc Oldpos (for right velocity) using simple euler
            // oldPos = this.Position - vel * m_time;
            Vector2 oldParticlePosition = Vector2.Mult(particleVelocity, (float) theTimeSinceLastEmission);
            oldParticlePosition = Vector2.Subtract(thePosition, oldParticlePosition);


            particles.add(new FluidParticle(particlePosition,
                                            oldParticlePosition,
                                            particleVelocity,

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Examples of org.cmj.flowy.simulation.math.Vector2

        return particles;
    }


    private Vector2 getEmittedParticleVelocity() {
        float dist = (float) RAND.nextDouble() * theDistribution - theDistribution * 0.5f;
        Vector2 normal = theDirection.PerpendicularRight();
        normal = Vector2.Mult(normal, dist);
        Vector2 particleVelocity = Vector2.Add(theDirection, normal);
        particleVelocity.normalize();
        float velLen = (float) RAND.nextDouble() * (theMaxVelocity - theMinVelocity) + theMinVelocity;
        particleVelocity.multiply(velLen);
        return particleVelocity;
    }

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Examples of org.cmj.flowy.simulation.math.Vector2

     */
    public FluidParticle(final Vector2 position, final Vector2 oldPosition, final Vector2 velocity, final float mass) {
        this.mass = mass;
        this.position = position;
        this.oldPosition = oldPosition;
        this.force = new Vector2();
        this.velocity = velocity;
        this.density = Constants.DENSITY_OFFSET;
        theSolver = new VerletSolver(0.01f);
        updatePressure();
    }

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Examples of org.cmj.flowy.simulation.math.Vector2

   * @param mass The mass of the particle
   * @param timeStep The time (in seconds) over which the position etc has changed
   */
  public void solve(final Vector2 position, final Vector2 positionOld, final Vector2 velocity, final Vector2 force, final float mass, final float timeStep)
    {
    final Vector2 acceleration = Vector2.Divide(force, mass);  
        this.solve(position, positionOld, velocity, acceleration, timeStep);
    }

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Examples of org.cmj.flowy.simulation.math.Vector2

      float origPosY = position.y;
      
      // Position = Position + (1.0f - Damping) * (Position - PositionOld) +
    // dt * dt * a;
    acceleration.multiply(timeStep * timeStep);
    Vector2 temp = Vector2.Subtract(position, positionOld);
    temp.multiply(1.0f - theDamping);
    temp.add(acceleration);
    position.add(temp);
    positionOld.x = origPosX;
    positionOld.y = origPosY;
    
    // calculate velocity
    // Velocity = (Position - PositionOld) / dt;
    temp = Vector2.Subtract(position, positionOld);
    temp.divide(timeStep);
    velocity.setFromVector(temp);
  }

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