Examples with Point com.jme3.scene.plugins.blender.meshes.Point used on opensource projects

Example 1 with Point

use of com.jme3.scene.plugins.blender.meshes.Point in project jmonkeyengine by jMonkeyEngine.

the class BoundingBox method collideWithRay.

/**
     * @see com.jme.bounding.BoundingVolume#intersectsWhere(com.jme.math.Ray)
     */
private int collideWithRay(Ray ray, CollisionResults results) {
    TempVars vars = TempVars.get();
    try {
        Vector3f diff = vars.vect1.set(ray.origin).subtractLocal(center);
        Vector3f direction = vars.vect2.set(ray.direction);
        //float[] t = {0f, Float.POSITIVE_INFINITY};
        // use one of the tempvars arrays
        float[] t = vars.fWdU;
        t[0] = 0;
        t[1] = Float.POSITIVE_INFINITY;
        float saveT0 = t[0], saveT1 = t[1];
        boolean notEntirelyClipped = clip(+direction.x, -diff.x - xExtent, t) && clip(-direction.x, +diff.x - xExtent, t) && clip(+direction.y, -diff.y - yExtent, t) && clip(-direction.y, +diff.y - yExtent, t) && clip(+direction.z, -diff.z - zExtent, t) && clip(-direction.z, +diff.z - zExtent, t);
        if (notEntirelyClipped && (t[0] != saveT0 || t[1] != saveT1)) {
            if (t[1] > t[0]) {
                float[] distances = t;
                Vector3f point0 = new Vector3f(ray.direction).multLocal(distances[0]).addLocal(ray.origin);
                Vector3f point1 = new Vector3f(ray.direction).multLocal(distances[1]).addLocal(ray.origin);
                CollisionResult result = new CollisionResult(point0, distances[0]);
                results.addCollision(result);
                result = new CollisionResult(point1, distances[1]);
                results.addCollision(result);
                return 2;
            }
            Vector3f point = new Vector3f(ray.direction).multLocal(t[0]).addLocal(ray.origin);
            CollisionResult result = new CollisionResult(point, t[0]);
            results.addCollision(result);
            return 1;
        }
        return 0;
    } finally {
        vars.release();
    }
}

Example 2 with Point

use of com.jme3.scene.plugins.blender.meshes.Point in project jmonkeyengine by jMonkeyEngine.

the class BoundingSphere method collideWithRay.

/*
     * (non-Javadoc)
     *
     * @see com.jme.bounding.BoundingVolume#intersectsWhere(com.jme.math.Ray)
     */
private int collideWithRay(Ray ray, CollisionResults results) {
    TempVars vars = TempVars.get();
    Vector3f diff = vars.vect1.set(ray.getOrigin()).subtractLocal(center);
    float a = diff.dot(diff) - (getRadius() * getRadius());
    float a1, discr, root;
    if (a <= 0.0) {
        // inside sphere
        a1 = ray.direction.dot(diff);
        discr = (a1 * a1) - a;
        root = FastMath.sqrt(discr);
        float distance = root - a1;
        Vector3f point = new Vector3f(ray.direction).multLocal(distance).addLocal(ray.origin);
        CollisionResult result = new CollisionResult(point, distance);
        results.addCollision(result);
        vars.release();
        return 1;
    }
    a1 = ray.direction.dot(diff);
    vars.release();
    if (a1 >= 0.0) {
        return 0;
    }
    discr = a1 * a1 - a;
    if (discr < 0.0) {
        return 0;
    } else if (discr >= FastMath.ZERO_TOLERANCE) {
        root = FastMath.sqrt(discr);
        float dist = -a1 - root;
        Vector3f point = new Vector3f(ray.direction).multLocal(dist).addLocal(ray.origin);
        results.addCollision(new CollisionResult(point, dist));
        dist = -a1 + root;
        point = new Vector3f(ray.direction).multLocal(dist).addLocal(ray.origin);
        results.addCollision(new CollisionResult(point, dist));
        return 2;
    } else {
        float dist = -a1;
        Vector3f point = new Vector3f(ray.direction).multLocal(dist).addLocal(ray.origin);
        results.addCollision(new CollisionResult(point, dist));
        return 1;
    }
}

Example 3 with Point

use of com.jme3.scene.plugins.blender.meshes.Point in project jmonkeyengine by jMonkeyEngine.

the class BoundingSphere method collideWithTri.

private int collideWithTri(Triangle tri, CollisionResults results) {
    TempVars tvars = TempVars.get();
    try {
        // Much of this is based on adaptation from this algorithm:
        // http://realtimecollisiondetection.net/blog/?p=103
        // ...mostly the stuff about eliminating sqrts wherever
        // possible.
        // Math is done in center-relative space.
        Vector3f a = tri.get1().subtract(center, tvars.vect1);
        Vector3f b = tri.get2().subtract(center, tvars.vect2);
        Vector3f c = tri.get3().subtract(center, tvars.vect3);
        Vector3f ab = b.subtract(a, tvars.vect4);
        Vector3f ac = c.subtract(a, tvars.vect5);
        // Check the plane... if it doesn't intersect the plane
        // then it doesn't intersect the triangle.
        Vector3f n = ab.cross(ac, tvars.vect6);
        float d = a.dot(n);
        float e = n.dot(n);
        if (d * d > radius * radius * e) {
            // Can't possibly intersect
            return 0;
        }
        // We intersect the verts, or the edges, or the face...
        // First check against the face since it's the most
        // specific.
        // Calculate the barycentric coordinates of the
        // sphere center
        Vector3f v0 = ac;
        Vector3f v1 = ab;
        // a was P relative, so p.subtract(a) is just -a
        // instead of wasting a vector we'll just negate the
        // dot products below... it's all v2 is used for.
        Vector3f v2 = a;
        float dot00 = v0.dot(v0);
        float dot01 = v0.dot(v1);
        float dot02 = -v0.dot(v2);
        float dot11 = v1.dot(v1);
        float dot12 = -v1.dot(v2);
        float invDenom = 1 / (dot00 * dot11 - dot01 * dot01);
        float u = (dot11 * dot02 - dot01 * dot12) * invDenom;
        float v = (dot00 * dot12 - dot01 * dot02) * invDenom;
        if (u >= 0 && v >= 0 && (u + v) <= 1) {
            // We intersect... and we even know where
            Vector3f part1 = ac;
            Vector3f part2 = ab;
            Vector3f p = center.add(a.add(part1.mult(u)).addLocal(part2.mult(v)));
            CollisionResult r = new CollisionResult();
            Vector3f normal = n.normalize();
            // a is center relative, so -a points to center
            float dist = -normal.dot(a);
            dist = dist - radius;
            r.setDistance(dist);
            r.setContactNormal(normal);
            r.setContactPoint(p);
            results.addCollision(r);
            return 1;
        }
        // Check the edges looking for the nearest point
        // that is also less than the radius.  We don't care
        // about points that are farther away than that.
        Vector3f nearestPt = null;
        float nearestDist = radius * radius;
        Vector3f base;
        Vector3f edge;
        float t;
        // Edge AB
        base = a;
        edge = ab;
        t = -edge.dot(base) / edge.dot(edge);
        if (t >= 0 && t <= 1) {
            Vector3f Q = base.add(edge.mult(t, tvars.vect7), tvars.vect8);
            // distance squared to origin
            float distSq = Q.dot(Q);
            if (distSq < nearestDist) {
                nearestPt = Q;
                nearestDist = distSq;
            }
        }
        // Edge AC
        base = a;
        edge = ac;
        t = -edge.dot(base) / edge.dot(edge);
        if (t >= 0 && t <= 1) {
            Vector3f Q = base.add(edge.mult(t, tvars.vect7), tvars.vect9);
            // distance squared to origin
            float distSq = Q.dot(Q);
            if (distSq < nearestDist) {
                nearestPt = Q;
                nearestDist = distSq;
            }
        }
        // Edge BC
        base = b;
        Vector3f bc = c.subtract(b);
        edge = bc;
        t = -edge.dot(base) / edge.dot(edge);
        if (t >= 0 && t <= 1) {
            Vector3f Q = base.add(edge.mult(t, tvars.vect7), tvars.vect10);
            // distance squared to origin
            float distSq = Q.dot(Q);
            if (distSq < nearestDist) {
                nearestPt = Q;
                nearestDist = distSq;
            }
        }
        // done.       
        if (nearestPt != null) {
            // We have a hit
            float dist = FastMath.sqrt(nearestDist);
            Vector3f cn = nearestPt.divide(-dist);
            CollisionResult r = new CollisionResult();
            r.setDistance(dist - radius);
            r.setContactNormal(cn);
            r.setContactPoint(nearestPt.add(center));
            results.addCollision(r);
            return 1;
        }
        // Finally check each of the triangle corners
        // Vert A
        base = a;
        // distance squared to origin
        t = base.dot(base);
        if (t < nearestDist) {
            nearestDist = t;
            nearestPt = base;
        }
        // Vert B
        base = b;
        // distance squared to origin
        t = base.dot(base);
        if (t < nearestDist) {
            nearestDist = t;
            nearestPt = base;
        }
        // Vert C
        base = c;
        // distance squared to origin
        t = base.dot(base);
        if (t < nearestDist) {
            nearestDist = t;
            nearestPt = base;
        }
        if (nearestPt != null) {
            // We have a hit
            float dist = FastMath.sqrt(nearestDist);
            Vector3f cn = nearestPt.divide(-dist);
            CollisionResult r = new CollisionResult();
            r.setDistance(dist - radius);
            r.setContactNormal(cn);
            r.setContactPoint(nearestPt.add(center));
            results.addCollision(r);
            return 1;
        }
        // Nothing hit... oh, well 
        return 0;
    } finally {
        tvars.release();
    }
}

Example 4 with Point

use of com.jme3.scene.plugins.blender.meshes.Point in project jmonkeyengine by jMonkeyEngine.

the class BoundingBox method distanceToEdge.

public float distanceToEdge(Vector3f point) {
    // compute coordinates of point in box coordinate system
    TempVars vars = TempVars.get();
    Vector3f closest = vars.vect1;
    point.subtract(center, closest);
    // project test point onto box
    float sqrDistance = 0.0f;
    float delta;
    if (closest.x < -xExtent) {
        delta = closest.x + xExtent;
        sqrDistance += delta * delta;
        closest.x = -xExtent;
    } else if (closest.x > xExtent) {
        delta = closest.x - xExtent;
        sqrDistance += delta * delta;
        closest.x = xExtent;
    }
    if (closest.y < -yExtent) {
        delta = closest.y + yExtent;
        sqrDistance += delta * delta;
        closest.y = -yExtent;
    } else if (closest.y > yExtent) {
        delta = closest.y - yExtent;
        sqrDistance += delta * delta;
        closest.y = yExtent;
    }
    if (closest.z < -zExtent) {
        delta = closest.z + zExtent;
        sqrDistance += delta * delta;
        closest.z = -zExtent;
    } else if (closest.z > zExtent) {
        delta = closest.z - zExtent;
        sqrDistance += delta * delta;
        closest.z = zExtent;
    }
    vars.release();
    return FastMath.sqrt(sqrDistance);
}

Example 5 with Point

use of com.jme3.scene.plugins.blender.meshes.Point in project jmonkeyengine by jMonkeyEngine.

the class BoundingBox method computeFromTris.

public void computeFromTris(int[] indices, Mesh mesh, int start, int end) {
    if (end - start <= 0) {
        return;
    }
    TempVars vars = TempVars.get();
    Vector3f vect1 = vars.vect1;
    Vector3f vect2 = vars.vect2;
    Triangle triangle = vars.triangle;
    Vector3f min = vect1.set(Float.POSITIVE_INFINITY, Float.POSITIVE_INFINITY, Float.POSITIVE_INFINITY);
    Vector3f max = vect2.set(Float.NEGATIVE_INFINITY, Float.NEGATIVE_INFINITY, Float.NEGATIVE_INFINITY);
    Vector3f point;
    for (int i = start; i < end; i++) {
        mesh.getTriangle(indices[i], triangle);
        point = triangle.get(0);
        checkMinMax(min, max, point);
        point = triangle.get(1);
        checkMinMax(min, max, point);
        point = triangle.get(2);
        checkMinMax(min, max, point);
    }
    center.set(min.addLocal(max));
    center.multLocal(0.5f);
    xExtent = max.x - center.x;
    yExtent = max.y - center.y;
    zExtent = max.z - center.z;
    vars.release();
}