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PO"Infinite" world problems
 

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  1. PO"Infinite" world problems
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    <p>I'm creating a minecraft like voxel engine thing in xna, and have started about implementing "infinite" world but have ran into a few problems. One such problem is that the following line always seems to apply the oppisite (eg if the player moved X+ REGION_SIZE_X it would assign Direction.X_DECREASING instead of the expected Direction.X_INCREASING).</p> <pre><code> Thread regionLoader; public void CheckPlayer() { Direction direction = Direction.MAX; float distancetraveledx = player.Origin.X - player.Position.X; float distancetraveledy = player.Origin.Y - player.Position.Y; float distancetraveledz = player.Origin.Z - player.Position.Z; if (distancetraveledx &gt; Variables.REGION_SIZE_X) { direction = Direction.XIncreasing; player.Position = new Vector3(player.Origin.X, player.Position.Y, player.Position.Z); } else if (distancetraveledx &lt; -Variables.REGION_SIZE_X) { direction = Direction.XDecreasing; player.Position = new Vector3(player.Origin.X, player.Position.Y, player.Position.Z); } else if (distancetraveledz &gt; Variables.REGION_SIZE_Z) { direction = Direction.ZIncreasing; player.Position = new Vector3(player.Position.X, player.Position.Y, player.Origin.Z); } else if (distancetraveledz &lt; -Variables.REGION_SIZE_Z) { direction = Direction.ZDecreasing; player.Position = new Vector3(player.Position.X, player.Position.Y, player.Origin.Z); } if (direction != Direction.MAX) { regionManager.direction = direction; regionLoader = new Thread(new ThreadStart(regionManager.ShiftRegions)); regionLoader.Start(); } } </code></pre> <p>So what this is doing is checking if the player has moved REGION_SIZE from it's origin and if it has, reset the component of the position which has moved over that boundary.</p> <p>This then calls the following function:</p> <pre><code> public void ShiftRegions() { // Future and current arrays are to avoid moving elements twice (or maybe I am thinking about it in the wrong way...) future_regions = new Region[(int)Variables.RENDER_DISTANCE, (int)Variables.RENDER_DISTANCE, (int)Variables.RENDER_DISTANCE]; for (short j = 0; j &lt; future_regions.GetLength(0); j++) { for (short m = 0; m &lt; future_regions.GetLength(1); m++) { for (short i = 0; i &lt; future_regions.GetLength(2); i++) { future_regions[j, m, i] = new Region(world, new Vector3i(new Vector3(j, m, i))); switch (direction) { // This appears to work as XDecreasing case Direction.XIncreasing: // If it is not at the back if (j != future_regions.GetLength(0) - 1) { // Make the regions look like they are scrolling backward future_regions[j, m, i] = regions[j + 1, m, i]; future_regions[j, m, i].Index = new Vector3i((uint)j, (uint)m, (uint)i); // In the next call the vertex buffer will be regenerated thus placing the "blocks" in the correct position future_regions[j, m, i].Dirty = true; } // If it is the front most region to which the player is traveling ing if (j == 0) { // New the region setting the Generated flags to false thus allowing it to be regenerated future_regions[j, m, i] = new Region(world, new Vector3i(new Vector3(j, m, i))); } // If it is at the back of the regions if (j == future_regions.GetLength(0) - 1) { //store region } break; case Direction.XDecreasing: break; } } } } generator.build(ref future_regions); direction = Direction.MAX; this.regions = future_regions; } </code></pre> <p>This actually moves the regions which causes the scrolling effect and the new regions which appear at the front. Which doesn't seem to work.</p> <p>I was thinking istead of actually "moving" the regions i could just assign different offsets and move in the world matrix but when I do so i just get a blue screen...</p> <p>Here is the rest of the code:</p> <p>Generator class function:</p> <pre><code> public virtual void build(ref Region[,,] regions) { for (short j = 0; j &lt; regions.GetLength(0); j++) { for (short m = 0; m &lt; regions.GetLength(1); m++) { for (short i = 0; i &lt; regions.GetLength(2); i++) { OutputBuffer.Add("Generating..."); if (regions[j, m, i].Generated == false) { regions[j, m, i].Dirty = true; regions[j, m, i].Generated = true; for (short x = 0; x &lt; Variables.REGION_SIZE_X; x++) { for (short y = 0; y &lt; Variables.REGION_SIZE_Y; y++) { for (short z = 0; z &lt; Variables.REGION_SIZE_Z; z++) { regions[j, m, i].Blocks[x, y, z] = new Block(); Vector3i relativeBlock = new Vector3i(new Vector3(x + Variables.REGION_SIZE_X * j, y + Variables.REGION_SIZE_Y * m, z + Variables.REGION_SIZE_Z * i)); if (x == 0 || x == 16 || x == 32 || z == 0 || z == 16 || z == 32 || y == 0 || y == 16 || y == 32) { regions[j, m, i].Blocks[x, y, z].BlockType = BlockType.dirt; } else { regions[j, m, i].Blocks[x, y, z].BlockType = BlockType.grass; } } } } } } } } } </code></pre> <p>and the code that checks if the region's buffers need to be rebuilt:</p> <pre><code> public void Update(World world) { this.world = world; for (short j = 0; j &lt; regions.GetLength(0); j++) { for (short m = 0; m &lt; regions.GetLength(1); m++) { for (short i = 0; i &lt; regions.GetLength(2); i++) { if (regions[j, m, i].Dirty &amp;&amp; regions[j, m, i].Generated) { regions[j, m, i].BuildVertexBuffers(); } } } } } </code></pre> <p>By the way, if Dirty is set to true this means that the buffers need to be regenerated.</p> <p>Any ideas why this is not creating new regions at the front and why it is not scrolling properly?</p> <p>EDIT: I was just thinking logically and that my idea with the changing the regions position in the array will not change it's world position, and like I said above with transforming them to the correct positions instead of copying them - that seems like the most logical step. Well the thing is I may have to copy some to different places in the regions array because the array may become spaghetti in no time if you just transform them...</p> <p>Thanks, Darestium</p>
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    1. USDarestium
    1. USDarestium
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    1. COBecause of the amount of code in your question, you might have more luck getting an answer on http://codereview.stackexchange.com.
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      1. USMatthew Strawbridge
    2. COThanks, ill have to try that out :)
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      1. PO"Infinite" world problems
      1. USDarestium
 

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