From af04cbe3592656cf6981232550a460f1b10e2560 Mon Sep 17 00:00:00 2001
From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Wed, 31 Oct 2018 14:24:38 +0100
Subject: view: refactor generic parts of MapView into a TileView

---
 src/view/MapView.ts | 80 +++++++++++++++--------------------------------------
 1 file changed, 22 insertions(+), 58 deletions(-)

(limited to 'src/view/MapView.ts')

diff --git a/src/view/MapView.ts b/src/view/MapView.ts
index 1061196..a5af8f7 100644
--- a/src/view/MapView.ts
+++ b/src/view/MapView.ts
@@ -1,74 +1,38 @@
 import MapState from '../model/state/MapState';
-import {TileMap} from './MapLoader';
+import { TileMap } from './MapLoader';
 import Renderer from './renderer/Renderer';
+import { TileView, TileViewBuilder } from './tile';
 
 export default class MapView {
-	private readonly vertexBuffer: WebGLBuffer;
-	private readonly textureBuffer: WebGLBuffer;
+	private static addTile(builder: TileViewBuilder, tileMap: TileMap, x: number, y: number, tile: string) {
+		if (tile === ' ')
+			return;
+
+		const tilePos = tileMap.tiles.get(tile);
+		if (!tilePos)
+			throw new Error('invalid tile specifier in map data');
+
+		builder.addTile([x, y, x + 1, y + 1], tilePos);
+	}
+
+	private readonly tileView: TileView;
 
 	constructor(
-		private readonly r: Renderer,
-		private readonly map: MapState,
-		private readonly tileMap: TileMap,
+		r: Renderer,
+		map: MapState,
+		tileMap: TileMap,
 	) {
-		const vertexData: number[] = [];
-		const textureData: number[] = [];
+		const builder = new TileViewBuilder(r, tileMap.texture);
 
 		for (let x = 0; x < map.data.width; x++)
 			for (let y = 0; y < map.data.height; y++)
 				for (const layer of map.data.layers)
-					this.addTile(vertexData, textureData, x, y, layer[y][x]);
-
-		const gl = r.getContext();
+					MapView.addTile(builder, tileMap, x, y, layer[y][x]);
 
-		this.vertexBuffer = r.createBuffer();
-		gl.bindBuffer(gl.ARRAY_BUFFER, this.vertexBuffer);
-		gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(vertexData), gl.STATIC_DRAW);
-
-		this.textureBuffer = r.createBuffer();
-		gl.bindBuffer(gl.ARRAY_BUFFER, this.textureBuffer);
-		gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(textureData), gl.STATIC_DRAW);
+		this.tileView = builder.build();
 	}
 
-	public draw(): void {
-		const gl = this.r.getContext();
-
-		gl.clear(gl.COLOR_BUFFER_BIT);
-
-		gl.activeTexture(gl.TEXTURE0);
-		gl.bindTexture(gl.TEXTURE_2D, this.tileMap.texture);
-		gl.uniform1i(this.r.getSamplerLoc(), 0);
-
-		gl.bindBuffer(gl.ARRAY_BUFFER, this.vertexBuffer);
-		gl.vertexAttribPointer(this.r.getVertexPosLoc(), 2, gl.FLOAT, false, 0, 0);
-
-		gl.bindBuffer(gl.ARRAY_BUFFER, this.textureBuffer);
-		gl.vertexAttribPointer(this.r.getTextureCoordLoc(), 2, gl.FLOAT, false, 0, 0);
-
-		gl.drawArrays(gl.TRIANGLES, 0, 6 * this.map.data.width * this.map.data.height);
-	}
-
-	private pushTile(buf: number[], coords: [number, number, number, number]) {
-		const [x1, y1, x2, y2] = coords;
-
-		buf.push(x1); buf.push(y1);
-		buf.push(x2); buf.push(y1);
-		buf.push(x1); buf.push(y2);
-
-		buf.push(x1); buf.push(y2);
-		buf.push(x2); buf.push(y1);
-		buf.push(x2); buf.push(y2);
-	}
-
-	private addTile(vertexData: number[], textureData: number[], x: number, y: number, tile: string) {
-		if (tile === ' ')
-			return;
-
-		const tilePos = this.tileMap.tiles.get(tile);
-		if (!tilePos)
-			throw new Error('invalid tile specifier in map data');
-
-		this.pushTile(vertexData, [x, y, x + 1, y + 1]);
-		this.pushTile(textureData, tilePos);
+	public render(): void {
+		this.tileView.render();
 	}
 }
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