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Add import_gltf plugin

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This commit is contained in:
luboslenco
2019-12-24 19:41:14 +01:00
parent 1761eb38d9
commit e0f79fe80d
6 changed files with 59 additions and 192 deletions
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Assets/plugins/import_gltf.js
+55
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Assets/plugins/import_gltf.wasm
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Sources/arm/format/GltfParser.hx
-174
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@@ -1,174 +0,0 @@
package arm.format;
class GltfParser {
public var posa: kha.arrays.Int16Array = null;
public var nora: kha.arrays.Int16Array = null;
public var texa: kha.arrays.Int16Array = null;
public var inda: kha.arrays.Uint32Array = null;
public var scalePos = 1.0;
public var scaleTex = 1.0;
public var name = "";
public function new(blob: kha.Blob) {
// Prototype only, will collapse on anything more complex
var format: TGLTF = haxe.Json.parse(blob.toString());
var mesh = format.meshes[0];
var prim = mesh.primitives[0];
var a = format.accessors[prim.indices];
var v = format.bufferViews[a.bufferView];
var buf = format.buffers[v.buffer];
var bytes: haxe.io.Bytes = null;
var tag = "data:application/octet-stream;base64,";
if (StringTools.startsWith(buf.uri, tag)) {
bytes = haxe.crypto.Base64.decode(buf.uri.substr(tag.length));
}
else {
// uri points to external blob
}
if (bytes == null) return;
var b = kha.Blob.fromBytes(bytes);
var elemSize = v.byteLength / a.count;
switch (elemSize) {
case 1: inda = readU8Array(format, b, a);
case 2: inda = readU16Array(format, b, a);
default: inda = readU32Array(format, b, a);
}
var posa32 = readF32Array(format, b, format.accessors[prim.attributes.POSITION]);
var nora32 = readF32Array(format, b, format.accessors[prim.attributes.NORMAL]);
var texa32 = prim.attributes.TEXCOORD_0 != null ? readF32Array(format, b, format.accessors[prim.attributes.TEXCOORD_0]) : null;
// Pack positions to (-1, 1) range
var hx = 0.0;
var hy = 0.0;
var hz = 0.0;
for (i in 0...Std.int(posa32.length / 3)) {
var f = Math.abs(posa32[i * 3]);
if (hx < f) hx = f;
f = Math.abs(posa32[i * 3 + 1]);
if (hy < f) hy = f;
f = Math.abs(posa32[i * 3 + 2]);
if (hz < f) hz = f;
}
scalePos = Math.max(hx, Math.max(hy, hz));
var inv = 1 / scalePos;
// Pack into 16bit
var verts = Std.int(posa32.length / 3);
posa = new kha.arrays.Int16Array(verts * 4);
nora = new kha.arrays.Int16Array(verts * 2);
texa = texa32 != null ? new kha.arrays.Int16Array(verts * 2) : null;
for (i in 0...verts) {
posa[i * 4 ] = Std.int(posa32[i * 3 ] * 32767 * inv);
posa[i * 4 + 1] = Std.int(posa32[i * 3 + 1] * 32767 * inv);
posa[i * 4 + 2] = Std.int(posa32[i * 3 + 2] * 32767 * inv);
posa[i * 4 + 3] = Std.int(nora32[i * 3 + 2] * 32767);
nora[i * 2 ] = Std.int(nora32[i * 3 ] * 32767);
nora[i * 2 + 1] = Std.int(nora32[i * 3 + 1] * 32767);
if (texa != null) {
texa[i * 2 ] = Std.int(texa32[i * 2 ] * 32767);
texa[i * 2 + 1] = Std.int(texa32[i * 2 + 1] * 32767);
}
}
}
function readU8Array(format: TGLTF, b: kha.Blob, a: TAccessor): kha.arrays.Uint32Array {
var v = format.bufferViews[a.bufferView];
var ar = new kha.arrays.Uint32Array(v.byteLength);
var pos = v.byteOffset;
var i = 0;
while (pos < v.byteOffset + v.byteLength) {
ar[i] = b.readU8(pos);
pos += 1;
i++;
}
return ar;
}
function readU16Array(format: TGLTF, b: kha.Blob, a: TAccessor): kha.arrays.Uint32Array {
var v = format.bufferViews[a.bufferView];
var ar = new kha.arrays.Uint32Array(Std.int(v.byteLength / 2));
var pos = v.byteOffset;
var i = 0;
while (pos < v.byteOffset + v.byteLength) {
ar[i] = b.readU16LE(pos);
pos += 2;
i++;
}
return ar;
}
function readU32Array(format: TGLTF, b: kha.Blob, a: TAccessor): kha.arrays.Uint32Array {
var v = format.bufferViews[a.bufferView];
var ar = new kha.arrays.Uint32Array(Std.int(v.byteLength / 4));
var pos = v.byteOffset;
var i = 0;
while (pos < v.byteOffset + v.byteLength) {
ar[i] = b.readU32LE(pos);
pos += 4;
i++;
}
return ar;
}
function readF32Array(format: TGLTF, b: kha.Blob, a: TAccessor): kha.arrays.Float32Array {
var v = format.bufferViews[a.bufferView];
var ar = new kha.arrays.Float32Array(Std.int(v.byteLength / 4));
var pos = v.byteOffset;
var i = 0;
while (pos < v.byteOffset + v.byteLength) {
ar[i] = b.readF32LE(pos);
pos += 4;
i++;
}
return ar;
}
}
typedef TGLTF = {
var accessors: Array<TAccessor>;
var bufferViews: Array<TBufferView>;
var buffers: Array<TBuffer>;
var meshes: Array<TMesh>;
}
typedef TAccessor = {
var bufferView: Int;
var componentType: Int;
var count: Int;
var max: Array<Float>;
var min: Array<Float>;
var type: String;
}
typedef TBufferView = {
var buffer: Int;
var byteLength: Int;
var byteOffset: Int;
var target: Int;
}
typedef TBuffer = {
var byteLength: Int;
var uri: String;
}
typedef TMesh = {
var name: String;
var primitives: Array<TPrimitive>;
}
typedef TPrimitive = {
var attributes: TAttributes;
var indices: Int;
}
typedef TAttributes = {
var POSITION: Null<Int>;
var NORMAL: Null<Int>;
var TANGENT: Null<Int>;
var TEXCOORD_0: Null<Int>;
}
Sources/arm/io/ImportGltf.hx
-16
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@@ -1,16 +0,0 @@
package arm.io;
import kha.Blob;
import iron.data.Data;
import arm.format.GltfParser;
class ImportGltf {
public static function run(path: String) {
Data.getBlob(path, function(b: Blob) {
var obj = new GltfParser(b);
ImportMesh.makeMesh(obj, path);
Data.deleteBlob(path);
});
}
}
Sources/arm/io/ImportMesh.hx
+3 -1
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@@ -40,7 +40,9 @@ class ImportMesh {
else {
var ext = path.substr(path.lastIndexOf(".") + 1);
var importer = Path.meshImporters.get(ext);
importer(path, function() {});
importer(path, function(mesh: Dynamic) {
ImportMesh.makeMesh(mesh, path);
});
}
if (Context.mergedObject != null) {
Sources/arm/sys/Path.hx
+1 -1
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@@ -14,7 +14,7 @@ class Path {
public static var meshFormats = ["obj", "fbx", "stl", "blend"];
public static var textureFormats = ["jpg", "jpeg", "png", "tga", "bmp", "psd", "gif", "hdr"];
public static var meshImporters = new Map<String, String->(Void->Void)->Void>();
public static var meshImporters = new Map<String, String->(Dynamic->Void)->Void>();
public static var textureImporters = new Map<String, String->(kha.Image->Void)->Void>();
public static function data(): String {