Java tutorial
/******************************************************************************* * Copyright 2013 See AUTHORS file. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. ******************************************************************************/ package com.badlogic.gdx.maps.tiled.renderers; import static com.badlogic.gdx.graphics.g2d.Batch.C1; import static com.badlogic.gdx.graphics.g2d.Batch.C2; import static com.badlogic.gdx.graphics.g2d.Batch.C3; import static com.badlogic.gdx.graphics.g2d.Batch.C4; import static com.badlogic.gdx.graphics.g2d.Batch.U1; import static com.badlogic.gdx.graphics.g2d.Batch.U2; import static com.badlogic.gdx.graphics.g2d.Batch.U3; import static com.badlogic.gdx.graphics.g2d.Batch.U4; import static com.badlogic.gdx.graphics.g2d.Batch.V1; import static com.badlogic.gdx.graphics.g2d.Batch.V2; import static com.badlogic.gdx.graphics.g2d.Batch.V3; import static com.badlogic.gdx.graphics.g2d.Batch.V4; import static com.badlogic.gdx.graphics.g2d.Batch.X1; import static com.badlogic.gdx.graphics.g2d.Batch.X2; import static com.badlogic.gdx.graphics.g2d.Batch.X3; import static com.badlogic.gdx.graphics.g2d.Batch.X4; import static com.badlogic.gdx.graphics.g2d.Batch.Y1; import static com.badlogic.gdx.graphics.g2d.Batch.Y2; import static com.badlogic.gdx.graphics.g2d.Batch.Y3; import static com.badlogic.gdx.graphics.g2d.Batch.Y4; import com.badlogic.gdx.graphics.Color; import com.badlogic.gdx.graphics.g2d.Batch; import com.badlogic.gdx.graphics.g2d.TextureRegion; import com.badlogic.gdx.maps.tiled.TiledMap; import com.badlogic.gdx.maps.tiled.TiledMapTile; import com.badlogic.gdx.maps.tiled.TiledMapTileLayer; import com.badlogic.gdx.maps.tiled.TiledMapTileLayer.Cell; public class OrthogonalTiledMapRenderer extends BatchTiledMapRenderer { public OrthogonalTiledMapRenderer(TiledMap map) { super(map); } public OrthogonalTiledMapRenderer(TiledMap map, Batch batch) { super(map, batch); } public OrthogonalTiledMapRenderer(TiledMap map, float unitScale) { super(map, unitScale); } public OrthogonalTiledMapRenderer(TiledMap map, float unitScale, Batch batch) { super(map, unitScale, batch); } @Override public void renderTileLayer(TiledMapTileLayer layer) { final Color batchColor = batch.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 = row2 * layerTileHeight; float xStart = col1 * layerTileWidth; final float[] vertices = this.vertices; for (int row = row2; row >= row1; 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 + tile.getOffsetX() * unitScale; float y1 = y + tile.getOffsetY() * unitScale; 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; } } } batch.draw(region.getTexture(), vertices, 0, 20); } x += layerTileWidth; } y -= layerTileHeight; } } }