所以现在我正在复制相机视口内的图块，并使用以下函数将它们粘贴到 TiledMap 的顶部：
public TiledMapTile[][] copyRegion(TiledMapTileLayer layer, int x, int y, int width, int height) {
TiledMapTile[][] region = new TiledMapTile[width][height];
for (int ix = x; ix < x + width; ix++)
for (int iy = y; iy < y + height; iy++) {
Cell cell = layer.getCell(ix, iy);
if(cell == null)
continue;
region[ix - x][iy - y] = cell.getTile();
}
return region;
}
我的问题是这个双 for 循环，它搜索视口的每个 x 和 y 值，这是数千个循环，这显然是我的问题。在此之前，我将宽度和高度设置为 TiledMapTileLayer 的 layer.getTileHeight 和 layer.getTileWidth 并且运行顺利。这是因为层 x 和 y 的值是由 Tiles 决定的，所以它实际上只检查了大约 100 个切片，这要快得多。我将如何将 2“合并”在一起以仅复制视口内的图块，而不是视口内的 x 和 y 值？
我使用以下方法调用此函数：
clipboard = TileMapCopier.copyRegion(layer, 0, 0, (int) camera.viewportWidth, (int) camera.viewportHeight);
TileMapCopier.pasteRegion(layer, clipboard, 0, layer.getHeight() / 2);
谢谢！
编辑：有人告诉我查看正交平铺地图渲染器如何基于视口进行渲染。我真的不知道该怎么做：P 我还是新手。
@Override
public void renderTileLayer (TiledMapTileLayer layer) {
final Color batchColor = spriteBatch.getColor();
final float color = Color.toFloatBits(batchColor.r, batchColor.g, batchColor.b, batchColor.a * layer.getOpacity());
final int layerWidth = layer.getWidth();
final int layerHeight = layer.getHeight();
final float layerTileWidth = layer.getTileWidth() * unitScale;
final float layerTileHeight = layer.getTileHeight() * unitScale;
final int col1 = Math.max(0, (int)(viewBounds.x / layerTileWidth));
final int col2 = Math.min(layerWidth, (int)((viewBounds.x + viewBounds.width + layerTileWidth) / layerTileWidth));
final int row1 = Math.max(0, (int)(viewBounds.y / layerTileHeight));
final int row2 = Math.min(layerHeight, (int)((viewBounds.y + viewBounds.height + layerTileHeight) / layerTileHeight));
float y = row1 * layerTileHeight;
float xStart = col1 * layerTileWidth;
final float[] vertices = this.vertices;
for (int row = row1; row < row2; row++) {
float x = xStart;
for (int col = col1; col < col2; col++) {
final TiledMapTileLayer.Cell cell = layer.getCell(col, row);
if (cell == null) {
x += layerTileWidth;
continue;
}
final TiledMapTile tile = cell.getTile();
if (tile != null) {
final boolean flipX = cell.getFlipHorizontally();
final boolean flipY = cell.getFlipVertically();
final int rotations = cell.getRotation();
TextureRegion region = tile.getTextureRegion();
float x1 = x;
float y1 = y;
float x2 = x1 + region.getRegionWidth() * unitScale;
float y2 = y1 + region.getRegionHeight() * unitScale;
float u1 = region.getU();
float v1 = region.getV2();
float u2 = region.getU2();
float v2 = region.getV();
vertices[X1] = x1;
vertices[Y1] = y1;
vertices[C1] = color;
vertices[U1] = u1;
vertices[V1] = v1;
vertices[X2] = x1;
vertices[Y2] = y2;
vertices[C2] = color;
vertices[U2] = u1;
vertices[V2] = v2;
vertices[X3] = x2;
vertices[Y3] = y2;
vertices[C3] = color;
vertices[U3] = u2;
vertices[V3] = v2;
vertices[X4] = x2;
vertices[Y4] = y1;
vertices[C4] = color;
vertices[U4] = u2;
vertices[V4] = v1;
if (flipX) {
float temp = vertices[U1];
vertices[U1] = vertices[U3];
vertices[U3] = temp;
temp = vertices[U2];
vertices[U2] = vertices[U4];
vertices[U4] = temp;
}
if (flipY) {
float temp = vertices[V1];
vertices[V1] = vertices[V3];
vertices[V3] = temp;
temp = vertices[V2];
vertices[V2] = vertices[V4];
vertices[V4] = temp;
}
if (rotations != 0) {
switch (rotations) {
case Cell.ROTATE_90: {
float tempV = vertices[V1];
vertices[V1] = vertices[V2];
vertices[V2] = vertices[V3];
vertices[V3] = vertices[V4];
vertices[V4] = tempV;
float tempU = vertices[U1];
vertices[U1] = vertices[U2];
vertices[U2] = vertices[U3];
vertices[U3] = vertices[U4];
vertices[U4] = tempU;
break;
}
case Cell.ROTATE_180: {
float tempU = vertices[U1];
vertices[U1] = vertices[U3];
vertices[U3] = tempU;
tempU = vertices[U2];
vertices[U2] = vertices[U4];
vertices[U4] = tempU;
float tempV = vertices[V1];
vertices[V1] = vertices[V3];
vertices[V3] = tempV;
tempV = vertices[V2];
vertices[V2] = vertices[V4];
vertices[V4] = tempV;
break;
}
case Cell.ROTATE_270: {
float tempV = vertices[V1];
vertices[V1] = vertices[V4];
vertices[V4] = vertices[V3];
vertices[V3] = vertices[V2];
vertices[V2] = tempV;
float tempU = vertices[U1];
vertices[U1] = vertices[U4];
vertices[U4] = vertices[U3];
vertices[U3] = vertices[U2];
vertices[U2] = tempU;
break;
}
}
}
spriteBatch.draw(region.getTexture(), vertices, 0, 20);
}
x += layerTileWidth;
}
y += layerTileHeight;
}
}
}