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split up chunk VBO generation into two parts for future async changes

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Gered 2014-03-16 10:17:23 -04:00
parent 73e81949ab
commit 3a2bfb8cdc
1 changed files with 35 additions and 9 deletions
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44
src/main/java/ca/blarg/gdx/tilemap3d/ChunkVertexGenerator.java
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@ -27,20 +27,29 @@ public class ChunkVertexGenerator {
final Color tmpColor = new Color();
final Vector3 tmpOffset = new Vector3();
public GeneratedChunkMeshes generate(TileChunk chunk) {
boolean areVerticesGenerated;
// for async generation of TileMap VBO's... generateVertices() can be called on another thread, but
// createMeshFromVertices() must be called on the render thread (the OpenGL context's thread) because
// it is creating VBOs. thus, why these two methods are now split up from how they were before.
public void generateVertices(TileChunk chunk) {
if (areVerticesGenerated)
throw new IllegalStateException("Previously generated vertices have not yet been turned into meshes.");
TileMap tileMap = chunk.tileMap;
builder.begin(
VertexAttributes.Usage.Position |
VertexAttributes.Usage.Color |
VertexAttributes.Usage.Normal |
VertexAttributes.Usage.TextureCoordinates
VertexAttributes.Usage.Position |
VertexAttributes.Usage.Color |
VertexAttributes.Usage.Normal |
VertexAttributes.Usage.TextureCoordinates
);
alphaBuilder.begin(
VertexAttributes.Usage.Position |
VertexAttributes.Usage.Color |
VertexAttributes.Usage.Normal |
VertexAttributes.Usage.TextureCoordinates
VertexAttributes.Usage.Position |
VertexAttributes.Usage.Color |
VertexAttributes.Usage.Normal |
VertexAttributes.Usage.TextureCoordinates
);
for (int y = 0; y < chunk.getHeight(); ++y) {
@ -79,12 +88,29 @@ public class ChunkVertexGenerator {
}
}
areVerticesGenerated = true;
}
public GeneratedChunkMeshes createMeshFromVertices() {
if (!areVerticesGenerated)
throw new IllegalStateException("Vertices have not yet been generated. Cannot create a mesh.");
GeneratedChunkMeshes output = new GeneratedChunkMeshes();
output.opaqueMesh = builder.end();
output.alphaMesh = alphaBuilder.end();
areVerticesGenerated = false;
return output;
}
// if you're not doing async map generation, then you can (and probably should) still call this as before
public GeneratedChunkMeshes generate(TileChunk chunk) {
generateVertices(chunk);
return createMeshFromVertices();
}
private void handleCubeMesh(int x, int y, int z, Tile tile, TileChunk chunk, CubeTileMesh mesh, TileCoord tileMapPosition, Matrix4 transform, Color color) {
// determine what's next to each cube face
Tile left = chunk.getWithinSelfOrNeighbourSafe(x - 1, y, z);