flow: lights and normals

app/context/assets.js

@@ -10,6 +10,9 @@ const loading = {};
 export function useAsset(source) {
   const [assets, setAssets] = useContext(context);
   useEffect(() => {
+    if (!source) {
+      return undefined;
+    }
     if (!assets[source]) {
       if (!loading[source]) {
         (loading[source] = Assets.load(source)).then((asset) => {
@@ -21,5 +24,5 @@ export function useAsset(source) {
       }
     }
   }, [assets, setAssets, source]);
-  return assets[source];
+  return source ? assets[source] : undefined;
 }

app/react-components/pixi/extensions.js

@@ -1,10 +1,12 @@
 import {ExtensionType} from '@pixi/core';
 import {Layer, Stage as LayerStage} from '@pixi/layers';
 
-let AmbientLight, diffuseGroup, normalGroup, lightGroup;
-if ('undefined' !== typeof window) {
-  ({AmbientLight, diffuseGroup, normalGroup, lightGroup} = await import('@pixi/lights'));
-}
+import {
+  AmbientLight,
+  diffuseGroup,
+  normalGroup,
+  lightGroup,
+} from './lights.js';
 
 export const ApplicationStageLayers = {
   type: ExtensionType.Application,
@@ -26,6 +28,7 @@ export const ApplicationStageLights = {
       stage.addChild(new Layer(diffuseGroup));
       stage.addChild(new Layer(normalGroup));
       stage.addChild(new Layer(lightGroup));
+      // stage.addChild(new AmbientLight(0x2244ff, 0.1));
       stage.addChild(new AmbientLight(0xffffff, 1));
     },
   },

app/react-components/pixi/light.jsx

@@ -9,6 +9,11 @@ const LightInternal = PixiComponent('Light', {
   create({x, y}) {
     const light = new PointLight(0xffffff, 1);
     light.position.set(x, y);
+    // light.shader.program.fragmentSrc = light.shader.program.fragmentSrc.replace(
+    //   'float D = length(lightVector)',
+    //   'float D = length(lightVector) / 2.0',
+    // );
+    // light.falloff = [1, 10, 100]
     return light;
   },
   applyProps(light, oldProps, {x, y}) {

app/react-components/pixi/lights.js

@@ -0,0 +1,7 @@
+let AmbientLight, diffuseGroup, normalGroup, lightGroup;
+
+if ('undefined' !== typeof window) {
+  ({AmbientLight, diffuseGroup, normalGroup, lightGroup} = await import('@pixi/lights'));
+}
+
+export {AmbientLight, diffuseGroup, normalGroup, lightGroup};

app/react-components/pixi/sprite.jsx

@@ -1,27 +1,84 @@
 import {Sprite as PixiSprite} from '@pixi/react';
+import {useEffect, useState} from 'react';
 
 import {useAsset} from '@/context/assets.js';
 
-export default function Sprite({entity, ...rest}) {
-  const asset = useAsset(entity.Sprite.source);
+import {diffuseGroup, normalGroup} from './lights.js';
+
+function textureFromAsset(asset, animation, frame) {
   if (!asset) {
-    return false;
+    return undefined;
   }
   let texture;
   if (asset.data.animations) {
-    texture = asset.animations[entity.Sprite.animation][entity.Sprite.frame];
+    texture = asset.animations[animation][frame];
   }
   else {
     texture = asset.textures[''];
   }
+  return texture;
+}
+
+export default function Sprite({entity, ...rest}) {
+  const [mounted, setMounted] = useState();
+  const [normals, setNormals] = useState();
+  const [normalsMounted, setNormalsMounted] = useState();
+  const {anchor, animation, frame, scale, source} = entity.Sprite;
+  const asset = useAsset(source);
+  const normalsAsset = useAsset(normals);
+  useEffect(() => {
+    if (!asset) {
+      return;
+    }
+    const {normals} = asset.data.meta;
+    if (normals) {
+      const {pathname} = new URL(
+        source.split('/').slice(0, -1).concat(normals).join('/'),
+        'http://example.org',
+      );
+      setNormals(pathname);
+    }
+  }, [asset, source]);
+  const texture = textureFromAsset(
+    asset,
+    animation,
+    frame,
+  );
+  const normalsTexture = textureFromAsset(
+    normalsAsset,
+    animation,
+    frame,
+  );
+  if (mounted) {
+    mounted.parentGroup = diffuseGroup;
+  }
+  if (normalsMounted) {
+    normalsMounted.parentGroup = normalGroup;
+  }
   return (
-    <PixiSprite
-      anchor={entity.Sprite.anchor}
-      scale={entity.Sprite.scale}
-      texture={texture}
-      x={Math.round(entity.Position.x)}
-      y={Math.round(entity.Position.y)}
-      {...rest}
-    />
+    <>
+      {texture && (
+        <PixiSprite
+          anchor={anchor}
+          ref={setMounted}
+          scale={scale}
+          texture={texture}
+          x={Math.round(entity.Position.x)}
+          y={Math.round(entity.Position.y)}
+          {...rest}
+        />
+      )}
+      {normalsTexture && (
+        <PixiSprite
+          anchor={anchor}
+          ref={setNormalsMounted}
+          scale={scale}
+          texture={normalsTexture}
+          x={Math.round(entity.Position.x)}
+          y={Math.round(entity.Position.y)}
+          {...rest}
+        />
+      )}
+    </>
   );
 }

app/react-components/pixi/tile-layer.jsx

@@ -8,14 +8,10 @@ import {CompositeTilemap} from '@pixi/tilemap';
 import {CHUNK_SIZE} from '@/constants.js';
 import {useAsset} from '@/context/assets.js';
 
-let diffuseGroup, normalGroup;
-if ('undefined' !== typeof window) {
-  ({diffuseGroup, normalGroup} = await import('@pixi/lights'));
-}
-
+import {diffuseGroup, normalGroup} from './lights.js';
 
 const TileLayerInternal = PixiComponent('TileLayer', {
-  create: ({group, stage, tileLayer}) => {
+  create: ({group, tileLayer}) => {
     const container = new Container();
     const cy = Math.ceil(tileLayer.area.y / CHUNK_SIZE);
     const cx = Math.ceil(tileLayer.area.x / CHUNK_SIZE);
@@ -85,7 +81,7 @@ const TileLayerInternal = PixiComponent('TileLayer', {
 });
 
 export default function TileLayer(props) {
-  const {renderer, stage} = useApp();
+  const {renderer} = useApp();
   const {tileLayer} = props;
   const asset = useAsset(tileLayer.source);
   const normalsAsset = useAsset([tileLayer.source.slice(0, -'.json'.length), 'normals.json'].join('.'));
@@ -99,14 +95,12 @@ export default function TileLayer(props) {
         asset={asset}
         group={diffuseGroup}
         renderer={renderer}
-        stage={stage}
       />
       <TileLayerInternal
         {...props}
         asset={normalsAsset}
         group={normalGroup}
         renderer={renderer}
-        stage={stage}
       />
     </>
   );

public/assets/shit-shack/shit-shack.normals.json

@@ -0,0 +1 @@
+{"frames":{"":{"frame":{"x":0,"y":0,"w":110,"h":102},"spriteSourceSize":{"x":0,"y":0,"w":110,"h":102},"sourceSize":{"w":110,"h":102}}},"meta":{"format":"RGBA8888","image":"./shit-shack.normals.png","scale":1,"size":{"w":110,"h":102}}}