WGSL support for batching

src/platform/graphics/webgpu/webgpu-shader-processor-wgsl.js

@@ -196,7 +196,7 @@ class UniformLine {
 //     var<storage, read_write> storageBuffer : Buffer;
 //     var storageTexture : texture_storage_2d<rgba8unorm, write>;
 //     var videoTexture : texture_external;
-// eslint-disable-next-line
+
 const TEXTURE_REGEX = /^\s*var\s+(\w+)\s*:\s*(texture_\w+)(?:<(\w+)>)?;\s*$/;
 // eslint-disable-next-line
 const STORAGE_TEXTURE_REGEX = /^\s*var\s+([\w\d_]+)\s*:\s*(texture_storage_2d|texture_storage_2d_array)<([\w\d_]+),\s*(\w+)>\s*;\s*$/;

src/scene/shader-lib/chunks-wgsl/chunks-wgsl.js

@@ -165,7 +165,7 @@ import shadowPCF3PS from './lit/frag/lighting/shadowPCF3.js';
 import shadowPCF5PS from './lit/frag/lighting/shadowPCF5.js';
 // import shadowPCSSPS from './lit/frag/lighting/shadowPCSS.js';
 // import shadowSoftPS from './lit/frag/lighting/shadowSoft.js';
-// import skinBatchVS from './common/vert/skinBatch.js';
+import skinBatchVS from './common/vert/skinBatch.js';
 import skinVS from './common/vert/skin.js';
 import skyboxPS from './skybox/frag/skybox.js';
 import skyboxVS from './skybox/vert/skybox.js';
@@ -376,7 +376,7 @@ const shaderChunksWGSL = {
     shadowPCF5PS,
     // shadowPCSSPS,
     // shadowSoftPS,
-    // skinBatchVS,
+    skinBatchVS,
     skinVS,
     skyboxPS,
     skyboxVS,

src/scene/shader-lib/chunks-wgsl/common/vert/skinBatch.js

@@ -0,0 +1,26 @@
+export default /* wgsl */`
+attribute vertex_boneIndices: f32;
+
+var texture_poseMap: texture_2d<f32>;
+
+fn getBoneMatrix(indexFloat: f32) -> mat4x4f {
+
+    let width = i32(textureDimensions(texture_poseMap).x);
+    let index: i32 = i32(indexFloat + 0.5) * 3;
+    let iy: i32 = index / width;
+    let ix: i32 = index % width;
+
+    // read elements of 4x3 matrix
+    let v1: vec4f = textureLoad(texture_poseMap, vec2i(ix + 0, iy), 0);
+    let v2: vec4f = textureLoad(texture_poseMap, vec2i(ix + 1, iy), 0);
+    let v3: vec4f = textureLoad(texture_poseMap, vec2i(ix + 2, iy), 0);
+
+    // transpose to 4x4 matrix
+    return mat4x4f(
+        v1.x, v2.x, v3.x, 0,
+        v1.y, v2.y, v3.y, 0,
+        v1.z, v2.z, v3.z, 0,
+        v1.w, v2.w, v3.w, 1.0
+    );
+}
+`;