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babylon export fiddles for demo 2

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master
wgroeneveld 3 years ago
parent 54b857bd9b
commit ba64bc15c3
8 changed files with 6901 additions and 1486 deletions
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54
demos/demo2-blender-import/converter.js
Unescape View File

@ -1,16 +1,27 @@
/*-----
partially reverse-engineered https://david.blob.core.windows.net/softengine3d/part3/index.html
added compatibility with newer Babylon export formats
try this in your browser:
copy(BABYLON.SceneSerializer.SerializeMesh(BABYLON.MeshBuilder.CreateBox("bla", {}, scene), true, true))
What's possible with the MeshBuilder? See for example https://doc.babylonjs.com/how_to/polyhedra_shapes
------*/
var fs = require('fs');
var jsonObject = JSON.parse(fs.readFileSync('monkey.babylon', 'utf8'));
var args = process.argv.slice(2);
var jsonObject = JSON.parse(fs.readFileSync(args[0], 'utf8'));
var result =
"#include <libgba-sprite-engine/mesh.h>\n" +
"Mesh* createMesh() { \n" +
"\t auto obj = new Mesh();\n";
var meshes = 0;
var vertices = 0;
function addMesh(x, y, z) {
result += `\t obj->add(VectorFx::fromFloat(${x}, ${y}, ${z}));\n`;
meshes++;
vertices++;
}
var faces = 0;
function addFace(a, b, c) {
@ -26,11 +37,18 @@ function done() {
"}\n"
}
// partially reverse-engineered https://david.blob.core.windows.net/softengine3d/part3/index.html
for(var meshIndex = 0; meshIndex < jsonObject.meshes.length; meshIndex++) {
var verticesArray = jsonObject.meshes[meshIndex].vertices;
var indicesArray = jsonObject.meshes[meshIndex].indices;
var uvCount = jsonObject.meshes[meshIndex].uvCount;
const mesh = jsonObject.meshes[meshIndex];
var verticesArray = mesh.vertices;
var indicesArray = mesh.indices;
var uvCount = mesh.uvCount;
if(mesh.geometryId) {
const data = jsonObject.geometries.vertexData.find(v => v.id === mesh.geometryId);
verticesArray = data.positions
indicesArray = data.indices
// also contains .normals and .uvs
}
var verticesStep = 1;
switch(uvCount) {
case 0:
@ -42,6 +60,9 @@ for(var meshIndex = 0; meshIndex < jsonObject.meshes.length; meshIndex++) {
case 2:
verticesStep = 10;
break;
default:
verticesStep = 3;
break;
}
var verticesCount = verticesArray.length / verticesStep;
var facesCount = indicesArray.length / 3;
@ -51,19 +72,30 @@ for(var meshIndex = 0; meshIndex < jsonObject.meshes.length; meshIndex++) {
var y = verticesArray[index * verticesStep + 1];
var z = verticesArray[index * verticesStep + 2];
addMesh(x, y, z);
if(x !== undefined && y !== undefined && z !== undefined) {
addMesh(x, y, z);
} else {
console.log(`WARN; vertices index ${index} with step ${verticesStep} contains invalid data: ${x}, ${y}, ${z}`)
}
}
for(var index = 0; index < facesCount; index++) {
var a = indicesArray[index * 3];
var b = indicesArray[index * 3 + 1];
var c = indicesArray[index * 3 + 2];
addFace(a, b, c);
if(a !== undefined && b !== undefined && c !== undefined) {
addFace(a, b, c);
} else {
console.log(`WARN; indices index ${index} contains invalid data: ${a}, ${b}, ${c}`)
}
}
var position = jsonObject.meshes[meshIndex].position;
var position = mesh.position;
setPosition(position);
}
done();
fs.writeFileSync('src/mesh.cpp', result);
console.log(`mesh.cpp written; ${meshes} meshes and ${faces} faces. GLHF!`)
console.log(`mesh.cpp written; ${vertices} vertices and ${faces} faces. GLHF!`)
if(vertices > 800) {
console.log('WARNING lots of vertices detected, this will not run well...');
}

327
demos/demo2-blender-import/meshes/box.babylon
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@ -0,0 +1,327 @@
{
"geometries": {
"boxes": [],
"spheres": [],
"cylinders": [],
"toruses": [],
"grounds": [],
"planes": [],
"torusKnots": [],
"vertexData": [
{
"id": "78db452a-92d6-428a-badf-e5561ecc884e",
"updatable": false,
"positions": [
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],
"normals": [
0,
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0,
0,
1,
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1,
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1,
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0,
-1,
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0,
0,
-1,
0,
0,
-1,
0,
0,
-1,
0,
0,
-1,
0
],
"uvs": [
1,
1,
0,
1,
0,
0,
1,
0,
1,
1,
0,
1,
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0,
1,
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1,
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],
"indices": [
0,
1,
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0,
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16,
18,
19,
20,
21,
22,
20,
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23
]
}
]
},
"meshes": [
{
"name": "bla",
"id": "bla",
"type": "Mesh",
"position": [
0,
0,
0
],
"rotation": [
0,
0,
0
],
"scaling": [
1,
1,
1
],
"localMatrix": {
"0": 1,
"1": 0,
"2": 0,
"3": 0,
"4": 0,
"5": 1,
"6": 0,
"7": 0,
"8": 0,
"9": 0,
"10": 1,
"11": 0,
"12": 0,
"13": 0,
"14": 0,
"15": 1
},
"isEnabled": true,
"isVisible": true,
"infiniteDistance": false,
"pickable": true,
"receiveShadows": false,
"billboardMode": 0,
"visibility": 1,
"checkCollisions": false,
"isBlocker": false,
"overrideMaterialSideOrientation": null,
"isUnIndexed": false,
"geometryId": "78db452a-92d6-428a-badf-e5561ecc884e",
"subMeshes": [
{
"materialIndex": 0,
"verticesStart": 0,
"verticesCount": 24,
"indexStart": 0,
"indexCount": 36
}
],
"instances": [],
"animations": [],
"ranges": [],
"layerMask": 268435455,
"alphaIndex": 1.7976931348623157e+308,
"hasVertexAlpha": false,
"overlayAlpha": 0.5,
"overlayColor": [
1,
0,
0
],
"applyFog": true
}
]
}

1203
demos/demo2-blender-import/meshes/cylinder.babylon
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0
demos/demo2-blender-import/monkey.babylon → demos/demo2-blender-import/meshes/monkey.babylon
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315
demos/demo2-blender-import/meshes/octahedron.babylon
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@ -0,0 +1,315 @@
{
"geometries": {
"boxes": [],
"spheres": [],
"cylinders": [],
"toruses": [],
"grounds": [],
"planes": [],
"torusKnots": [],
"vertexData": [
{
"id": "c08fbf04-7758-4154-ab43-744f5d69019e",
"updatable": false,
"positions": [
0,
0,
1.414214,
1.414214,
0,
0,
0,
1.414214,
0,
0,
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1.414214,
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-1.414214,
0,
0,
-1.414214,
0,
0,
0,
0,
-1.414214,
0,
-1.414214,
0
],
"normals": [
0.5773502691896258,
0.5773502691896258,
0.5773502691896258,
0.5773502691896258,
0.5773502691896258,
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],
"uvs": [
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],
"indices": [
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]
}
]
},
"meshes": [
{
"name": "oct",
"id": "oct",
"type": "Mesh",
"position": [
0,
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],
"rotation": [
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0,
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],
"scaling": [
1,
1,
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],
"localMatrix": {
"0": 1,
"1": 0,
"2": 0,
"3": 0,
"4": 0,
"5": 1,
"6": 0,
"7": 0,
"8": 0,
"9": 0,
"10": 1,
"11": 0,
"12": 0,
"13": 0,
"14": 0,
"15": 1
},
"isEnabled": true,
"isVisible": true,
"infiniteDistance": false,
"pickable": true,
"receiveShadows": false,
"billboardMode": 0,
"visibility": 1,
"checkCollisions": false,
"isBlocker": false,
"overrideMaterialSideOrientation": null,
"isUnIndexed": false,
"geometryId": "c08fbf04-7758-4154-ab43-744f5d69019e",
"subMeshes": [
{
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"verticesStart": 0,
"verticesCount": 24,
"indexStart": 0,
"indexCount": 24
}
],
"instances": [],
"animations": [],
"ranges": [],
"layerMask": 268435455,
"alphaIndex": 1.7976931348623157e+308,
"hasVertexAlpha": false,
"overlayAlpha": 0.5,
"overlayColor": [
1,
0,
0
],
"applyFog": true
}
]
}

1
demos/demo2-blender-import/meshes/sphere.babylon
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4145
demos/demo2-blender-import/meshes/torus.babylon
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2342
demos/demo2-blender-import/src/mesh.cpp
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