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PORenderer/Sorting optimization
 

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  1. PORenderer/Sorting optimization
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    <p>Okay here is the problem:</p> <ol> <li>i do have a list of Objects that does need to be updated by the time since the last frame</li> <li>the list need to be ordered by the y koordinate of the Object before they get draw</li> </ol> <p>Current i do this with a collection.sort and a simple comperator:</p> <pre><code>figureComperator = new Comparator&lt;Actor&gt;() { @Override public int compare(Actor o1, Actor o2) { return (int) o2.getY() - (int) o1.getY(); } }; </code></pre> <p>The render does look like this:</p> <pre><code>@Override public void render(float delta) { // clearing Gdx.gl.glClearColor(0, 0, 0, 1f); Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT); // act the character act in front this.character.myAct(delta); updateGameCam(); if (this.status == GameStatus.GAME) { // just monster act now this.figureStage.act(); } this.figureStage.getActors().sort(figureComperator); // sort figures // render background this.map.drawBackground(); // draw background // draw figures inclusive character this.figureStage.draw(); //draw all figures this.map.drawForeground(); // foreground // render game HUD and act gameHud this.gameHud.act(delta); this.gameHud.draw(); } </code></pre> <p>So i am looking for a better way to improve the speed of this.</p> <p>I do came across the idea of let the actors sort itself inside of the list(<code>figureStage</code>) while i do update those. But as i do the update forall with the <code>this.figureStage.act();</code> i couldnt do it that easy. </p> <p><strong>So my question is, if there is any solution without having the complexity of an sorting algorithm to always have those objects sorted by its position?</strong></p>
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    1. COCan you keep the actors in a SortedSet so they are always sorted, and never have to be completely re-sorted?
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      1. USJoni
    2. CONot sure because they do change their y-positions on runtime.
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    3. COHow often does that happen?
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