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a JNI interface to Jolt Physics
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/*
Copyright (c) 2024 Stephen Gold

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
 */
package com.github.stephengold.joltjni;

import com.github.stephengold.joltjni.readonly.Vec3Arg;

/**
 * A {@code VehicleCollisionTester} that uses ray casts.
 *
 * @author Stephen Gold [email protected]
 */
public class VehicleCollisionTesterRay extends VehicleCollisionTester {
    // *************************************************************************
    // constructors

    /**
     * Instantiate a tester for the specified layer.
     *
     * @param objectLayer the index of the desired object layer for collisions
     * (≥0)
     */
    public VehicleCollisionTesterRay(int objectLayer) {
        this(objectLayer, Vec3.sAxisY());
    }

    /**
     * Instantiate a tester with the specified properties.
     *
     * @param objectLayer the index of the desired object layer for collisions
     * (≥0)
     * @param up the "up" direction (in system coordinates, not null,
     * unaffected, default=(0,1,0))
     */
    public VehicleCollisionTesterRay(int objectLayer, Vec3Arg up) {
        this(objectLayer, up, Jolt.degreesToRadians(80.0f));
    }

    /**
     * Instantiate a tester with the specified properties.
     *
     * @param objectLayer the index of the desired object layer for collisions
     * @param up the "up" direction (in system coordinates, not null,
     * unaffected, default=(0,1,0))
     * @param maxSlopeAngle the maximum angle to consider for colliding wheels
     * (in radians, default=4*Pi/9)
     */
    public VehicleCollisionTesterRay(
            int objectLayer, Vec3Arg up, float maxSlopeAngle) {
        float ux = up.getX();
        float uy = up.getY();
        float uz = up.getZ();
        long testerVa = createTester(objectLayer, ux, uy, uz, maxSlopeAngle);
        setVirtualAddress(testerVa, null); // not the owner due to ref counting
    }

    /**
     * Instantiate a tester with the specified native object assigned but not
     * owned.
     *
     * @param testerVa the virtual address of the native object to assign (not
     * zero)
     */
    VehicleCollisionTesterRay(long testerVa) {
        setVirtualAddress(testerVa, null); // not the owner due to ref counting
    }
    // *************************************************************************
    // VehicleCollisionTester methods

    /**
     * Create a counted reference to the native
     * {@code VehicleCollisionTesterRay}.
     *
     * @return a new JVM object with a new native object assigned
     */
    @Override
    public VehicleCollisionTesterRayRef toRef() {
        long testerVa = va();
        long refVa = VehicleCollisionTester.toRef(testerVa);
        VehicleCollisionTesterRayRef result
                = new VehicleCollisionTesterRayRef(refVa, true);

        return result;
    }
    // *************************************************************************
    // native private methods

    native private static long createTester(
            int objectLayer, float ux, float uy, float uz, float maxSlopeAngle);
}