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separate background and overlay regions in DrawExtendedAutoTile

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Ell 2021-12-03 20:59:56 +01:00
parent f34d4e3b68
commit 1ed6b019bb
2 changed files with 22 additions and 16 deletions
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5
Demos/AutoTilingDemo.cs
View file

@ -1,5 +1,6 @@
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using MLEM.Extensions;
using MLEM.Graphics;
using MLEM.Startup;
@ -61,7 +62,9 @@ namespace Demos {
AutoTiling.DrawAutoTile(this.SpriteBatch, new Vector2(x + 1, y + 1) * TileSize, this.texture, new Rectangle(0, 0, TileSize, TileSize), ConnectsTo, Color.White);
// when drawing extended auto-tiles, the same rules apply, but the source texture layout is different
AutoTiling.DrawExtendedAutoTile(this.SpriteBatch, new Vector2(x + 8, y + 1) * TileSize, this.texture, new Rectangle(0, TileSize * 2, TileSize, TileSize), ConnectsTo, Color.White, Color.White);
var background = new Rectangle(0, TileSize * 2, TileSize, TileSize);
var overlay = background.OffsetCopy(new Point(TileSize, 0));
AutoTiling.DrawExtendedAutoTile(this.SpriteBatch, new Vector2(x + 8, y + 1) * TileSize, this.texture, background, overlay, ConnectsTo, Color.White, Color.White);
}
}
this.SpriteBatch.End();

33
MLEM/Graphics/AutoTiling.cs
View file

@ -63,10 +63,9 @@ namespace MLEM.Graphics {
/// This method allows for a tiled texture to be drawn in an auto-tiling mode.
/// This allows, for example, a grass patch on a tilemap to have nice looking edges that transfer over into a path without any hard edges between tiles.
///
/// This method is a more complex version of <see cref="DrawAutoTile"/> that overlays separate border textures on a base texture, which also allows for non-rectangular texture areas to be used easily.
/// For auto-tiling in this way to work, the tiles have to be laid out as follows: 17 tiles aligned horizontally within the texture file, with the following information:
/// This method is a more complex version of <see cref="DrawAutoTile"/> that overlays separate border textures on a background texture region, which also allows for non-rectangular texture areas to be used easily.
/// For auto-tiling in this way to work, the overlay sections have to be laid out as follows: 16 sections aligned horizontally within the texture file, with the following information:
/// <list type="number">
/// <item><description>The texture used for filling big areas</description></item>
/// <item><description>The texture used for straight, horizontal borders, with the borders facing away from the center, split up into four parts: top left, then top right, then bottom left, then bottom right</description></item>
/// <item><description>The texture used for outer corners, with the corners facing away from the center, split up into four parts: top left, then top right, then bottom left, then bottom right</description></item>
/// <item><description>The texture used for straight, vertical borders, with the borders facing away from the center, split up into four parts: top left, then top right, then bottom left, then bottom right</description></item>
@ -77,7 +76,8 @@ namespace MLEM.Graphics {
/// <param name="batch">The sprite batch to use for drawing.</param>
/// <param name="pos">The position to draw at.</param>
/// <param name="texture">The texture to use for drawing.</param>
/// <param name="textureRegion">The location of the first texture region, as described in the summary.</param>
/// <param name="backgroundRegion">The location of the background region, or null to skip drawing a background.</param>
/// <param name="overlayRegion">The location of the first overlay region, as described in the summary.</param>
/// <param name="connectsTo">A function that determines whether two positions should connect.</param>
/// <param name="backgroundColor">The color to draw the texture used for filling big areas with.</param>
/// <param name="overlayColor">The color to draw border and corner textures with.</param>
@ -85,12 +85,13 @@ namespace MLEM.Graphics {
/// <param name="scale">The scale to draw with.</param>
/// <param name="layerDepth">The layer depth to draw with.</param>
/// <param name="overlayDepthOffset">An optional depth offset from <paramref name="layerDepth"/> that the overlay should be drawn with</param>
public static void DrawExtendedAutoTile(SpriteBatch batch, Vector2 pos, Texture2D texture, Rectangle textureRegion, ConnectsTo connectsTo, Color backgroundColor, Color overlayColor, Vector2? origin = null, Vector2? scale = null, float layerDepth = 0, float overlayDepthOffset = 0) {
public static void DrawExtendedAutoTile(SpriteBatch batch, Vector2 pos, Texture2D texture, Rectangle? backgroundRegion, Rectangle overlayRegion, ConnectsTo connectsTo, Color backgroundColor, Color overlayColor, Vector2? origin = null, Vector2? scale = null, float layerDepth = 0, float overlayDepthOffset = 0) {
var orig = origin ?? Vector2.Zero;
var sc = scale ?? Vector2.One;
var od = layerDepth + overlayDepthOffset;
var (r1, r2, r3, r4) = CalculateExtendedAutoTile(pos, textureRegion, connectsTo, sc);
batch.Draw(texture, pos, textureRegion, backgroundColor, 0, orig, sc, SpriteEffects.None, layerDepth);
var (r1, r2, r3, r4) = CalculateExtendedAutoTile(pos, overlayRegion, connectsTo, sc);
if (backgroundRegion != null)
batch.Draw(texture, pos, backgroundRegion, backgroundColor, 0, orig, sc, SpriteEffects.None, layerDepth);
if (r1 != Rectangle.Empty)
batch.Draw(texture, pos, r1, overlayColor, 0, orig, sc, SpriteEffects.None, od);
if (r2 != Rectangle.Empty)
@ -102,13 +103,15 @@ namespace MLEM.Graphics {
}
/// <inheritdoc cref="DrawExtendedAutoTile"/>
public static void AddExtendedAutoTile(StaticSpriteBatch batch, Vector2 pos, Texture2D texture, Rectangle textureRegion, ConnectsTo connectsTo, Color backgroundColor, Color overlayColor, Vector2? origin = null, Vector2? scale = null, float layerDepth = 0, float overlayDepthOffset = 0, ICollection<StaticSpriteBatch.Item> items = null) {
public static void AddExtendedAutoTile(StaticSpriteBatch batch, Vector2 pos, Texture2D texture, Rectangle? backgroundRegion, Rectangle overlayRegion, ConnectsTo connectsTo, Color backgroundColor, Color overlayColor, Vector2? origin = null, Vector2? scale = null, float layerDepth = 0, float overlayDepthOffset = 0, ICollection<StaticSpriteBatch.Item> items = null) {
var orig = origin ?? Vector2.Zero;
var sc = scale ?? Vector2.One;
var od = layerDepth + overlayDepthOffset;
var (r1, r2, r3, r4) = CalculateExtendedAutoTile(pos, textureRegion, connectsTo, sc);
var background = batch.Add(texture, pos, textureRegion, backgroundColor, 0, orig, sc, SpriteEffects.None, layerDepth);
items?.Add(background);
var (r1, r2, r3, r4) = CalculateExtendedAutoTile(pos, overlayRegion, connectsTo, sc);
if (backgroundRegion != null) {
var background = batch.Add(texture, pos, backgroundRegion, backgroundColor, 0, orig, sc, SpriteEffects.None, layerDepth);
items?.Add(background);
}
if (r1 != Rectangle.Empty) {
var o1 = batch.Add(texture, pos, r1, overlayColor, 0, orig, sc, SpriteEffects.None, od);
items?.Add(o1);
@ -150,10 +153,10 @@ namespace MLEM.Graphics {
var down = connectsTo(0, 1);
var left = connectsTo(-1, 0);
var right = connectsTo(1, 0);
var xUl = up && left ? connectsTo(-1, -1) ? -1 : 13 : left ? 1 : up ? 9 : 5;
var xUr = up && right ? connectsTo(1, -1) ? -1 : 14 : right ? 2 : up ? 10 : 6;
var xDl = down && left ? connectsTo(-1, 1) ? -1 : 15 : left ? 3 : down ? 11 : 7;
var xDr = down && right ? connectsTo(1, 1) ? -1 : 16 : right ? 4 : down ? 12 : 8;
var xUl = up && left ? connectsTo(-1, -1) ? -1 : 12 : left ? 0 : up ? 8 : 4;
var xUr = up && right ? connectsTo(1, -1) ? -1 : 13 : right ? 1 : up ? 9 : 5;
var xDl = down && left ? connectsTo(-1, 1) ? -1 : 14 : left ? 2 : down ? 10 : 6;
var xDr = down && right ? connectsTo(1, 1) ? -1 : 15 : right ? 3 : down ? 11 : 7;
var (w, h) = textureRegion.Size;
return (
xUl < 0 ? Rectangle.Empty : new Rectangle(textureRegion.X + xUl * w, textureRegion.Y, w, h),