velocity - 和发动机路径修正速度

Question

我有以下代码，让 Sprite 可以使用 Andengine 遵循路径。我需要改变 Sprite 沿着 path() 移动的速度(velocity)。有谁知道如何改变沿路径的速度？

private void follow_path5(final AnimatedSprite tSprite,int i) {
    final Path path = new Path(5)
    .to(20, startY)
    .to(416.0f, startY)
    .to(20.0f, startY)
    .to(416.0f,startY)
    .to(20.0f,startY);

    // Add the proper animation when a waypoint of the path is passed.
    tSprite.registerEntityModifier(new PathModifier(30.0f, path, null, new IPathModifierListener() {
        @Override
        public void onPathStarted(final PathModifier pPathModifier, final IEntity pEntity) {

        }

        @Override
        public void onPathWaypointStarted(final PathModifier pPathModifier, final IEntity pEntity, final int pWaypointIndex) {

            switch(pWaypointIndex) {
            case 0: case 1: case 2: case 3:
                final long[] frameDurations = new long[3];
                Arrays.fill(frameDurations, 500);
                tSprite.animate(frameDurations, 2, 4, true);

                break;

            case 4: case 5: case 6: case 7:
                final long[] frameDurations1 = new long[3];
                Arrays.fill(frameDurations1, 500);
                tSprite.animate(frameDurations1, 5, 7, true);

                break;

            case 8: case 9: case 10: case 11:
                final long[] frameDurations2 = new long[3];
                Arrays.fill(frameDurations2, 500);
                tSprite.animate(frameDurations2, 2, 4, true);

                break;

            case 12: case 13: case 14:
                final long[] frameDurations3 = new long[3];
                Arrays.fill(frameDurations3, 500);
                tSprite.animate(frameDurations3, 5, 7, true);

                break;
            }
        }

        @Override
        public void onPathWaypointFinished(final PathModifier pPathModifier, final IEntity pEntity, final int pWaypointIndex) {

        }

        @Override
        public void onPathFinished(final PathModifier pPathModifier, final IEntity pEntity) {
        }}));
    scene.attachChild(asprVamp[i]);
}

Answer 1

您只能给出移动的持续时间，每个路径修饰符 1。因此，如果您希望在不同的路径点有不同的速度，则必须创建不同的路径修改器。