Doni/ModelHandle
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Write separate buffer view for all accessors.

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This commit is contained in:
Viktor Kovacs 2021-03-28 15:48:08 +02:00
parent e86486e314
commit a35bceadea
1 changed files with 30 additions and 26 deletions
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56
source/export/exportergltf.js
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@ -115,12 +115,14 @@ OV.ExporterGltf = class extends OV.ExporterBase
});
let mainJsonString = JSON.stringify (mainJson, null, 4);
let glbSize = 12 + 8 + mainJsonString.length + 8 + mainBuffer.byteLength;
let mainJsonBufferLength = mainJsonString.length;
let mainBinaryBufferLength = mainBuffer.byteLength;
for (let i = 0; i < textureBuffers.length; i++) {
let textureBuffer = textureBuffers[i];
glbSize += textureBuffer.byteLength;
mainBinaryBufferLength += textureBuffer.byteLength;
}
let glbSize = 12 + 8 + mainJsonBufferLength + 8 + mainBinaryBufferLength;
let glbWriter = new OV.BinaryWriter (glbSize, true);
glbWriter.WriteUnsignedInteger32 (0x46546C67);
@ -130,7 +132,7 @@ OV.ExporterGltf = class extends OV.ExporterBase
glbWriter.WriteUnsignedInteger32 (mainJsonString.length);
glbWriter.WriteUnsignedInteger32 (0x4E4F534A);
for (let i = 0; i < mainJsonString.length; i++) {
glbWriter.WriteUnsignedCharacter8 (mainJsonString.charCodeAt (i));
glbWriter.WriteUnsignedCharacter8 (mainJsonString.charCodeAt (i));
}
glbWriter.WriteUnsignedInteger32 (mainBufferSize);
@ -204,6 +206,16 @@ OV.ExporterGltf = class extends OV.ExporterBase
GetMainJson (meshDataArr)
{
function AddBufferView (mainJson, offset, length)
{
mainJson.bufferViews.push ({
buffer : 0,
byteOffset : offset,
byteLength : length,
});
return offset + length;
}
let mainJson = {
asset : {
version : '2.0'
@ -236,10 +248,15 @@ OV.ExporterGltf = class extends OV.ExporterBase
let primitives = meshData.buffer.primitives;
for (let primitiveIndex = 0; primitiveIndex < primitives.length; primitiveIndex++) {
let primitive = primitives[primitiveIndex];
let bufferViewIndex = mainJson.bufferViews.length;
let accessorIndex = mainJson.accessors.length;
let accessorOffset = 0;
let bufferViewIndex = mainJson.bufferViews.length;
let bufferViewOffset = meshData.offsets[primitiveIndex];
bufferViewOffset = AddBufferView (mainJson, bufferViewOffset, primitive.indices.length * this.components.index.size);
bufferViewOffset = AddBufferView (mainJson, bufferViewOffset, primitive.vertices.length * this.components.number.size);
bufferViewOffset = AddBufferView (mainJson, bufferViewOffset, primitive.normals.length * this.components.number.size);
bufferViewOffset = AddBufferView (mainJson, bufferViewOffset, primitive.uvs.length * this.components.number.size);
let accessorIndex = mainJson.accessors.length;
let jsonPrimitive = {
attributes : {
POSITION : accessorIndex + 1,
@ -250,48 +267,35 @@ OV.ExporterGltf = class extends OV.ExporterBase
material : primitive.material
};
mainJson.bufferViews.push ({
buffer : 0,
byteOffset : meshData.offsets[primitiveIndex],
byteLength : meshData.sizes[primitiveIndex]
});
mainJson.accessors.push ({
bufferView : bufferViewIndex,
byteOffset : accessorOffset,
byteOffset : 0,
componentType : this.components.index.type,
count : primitive.indices.length,
type : 'SCALAR'
});
accessorOffset += primitive.indices.length * this.components.index.size;
mainJson.accessors.push ({
bufferView : bufferViewIndex,
byteOffset : accessorOffset,
bufferView : bufferViewIndex + 1,
byteOffset : 0,
componentType : this.components.number.type,
count : primitive.vertices.length / 3,
type : 'VEC3'
});
accessorOffset += primitive.vertices.length * this.components.number.size;
mainJson.accessors.push ({
bufferView : bufferViewIndex,
byteOffset : accessorOffset,
bufferView : bufferViewIndex + 2,
byteOffset : 0,
componentType : this.components.number.type,
count : primitive.normals.length / 3,
type : 'VEC3'
});
accessorOffset += primitive.normals.length * this.components.number.size;
if (primitive.uvs.length > 0) {
mainJson.accessors.push ({
bufferView : bufferViewIndex,
byteOffset : accessorOffset,
bufferView : bufferViewIndex + 3,
byteOffset : 0,
componentType : this.components.number.type,
count : primitive.uvs.length / 2,
type : 'VEC2'
});
accessorOffset += primitive.uvs.length * this.components.number.size;
jsonPrimitive.attributes.TEXCOORD_0 = accessorIndex + 3;
}