ModelBuffer tracks more blob info;

src/modules/data/modelData.h

@@ -103,9 +103,11 @@ typedef union {
 } AttributeData;
 
 typedef struct {
-  char* data;
+  uint32_t blob;
+  size_t offset;
   size_t size;
   size_t stride;
+  char* data;
 } ModelBuffer;
 
 typedef struct {

src/modules/data/modelData_gltf.c

@@ -507,8 +507,8 @@ ModelData* lovrModelDataInitGltf(ModelData* model, Blob* source, ModelDataIO* io
       size_t offset = 0;
       for (int k = (token++)->size; k > 0; k--) {
         gltfString key = NOM_STR(json, token);
-        if (STR_EQ(key, "buffer")) { buffer->data = model->blobs[NOM_INT(json, token)]->data; }
-        else if (STR_EQ(key, "byteOffset")) { offset = NOM_INT(json, token); }
+        if (STR_EQ(key, "buffer")) { buffer->blob = NOM_INT(json, token); }
+        else if (STR_EQ(key, "byteOffset")) { buffer->offset = NOM_INT(json, token); }
         else if (STR_EQ(key, "byteLength")) { buffer->size = NOM_INT(json, token); }
         else if (STR_EQ(key, "byteStride")) { buffer->stride = NOM_INT(json, token); }
         else { token += NOM_VALUE(json, token); }
@@ -516,10 +516,10 @@ ModelData* lovrModelDataInitGltf(ModelData* model, Blob* source, ModelDataIO* io
 
       // If this is the glb binary data, increment the offset to account for the file header
       if (buffer->data && buffer->data == source->data && glb) {
-        offset += binOffset;
+        buffer->offset += binOffset;
       }
 
-      buffer->data = (char*) buffer->data + offset;
+      buffer->data = (char*) model->blobs[buffer->blob]->data + buffer->offset;
     }
   }
 

src/modules/data/modelData_obj.c

@@ -256,12 +256,14 @@ ModelData* lovrModelDataInitObj(ModelData* model, Blob* source, ModelDataIO* io)
   model->blobs[1] = lovrBlobCreate(indexBlob.data, indexBlob.length * sizeof(int), "obj index data");
 
   model->buffers[0] = (ModelBuffer) {
+    .blob = 0,
     .data = model->blobs[0]->data,
     .size = model->blobs[0]->size,
     .stride = 8 * sizeof(float)
   };
 
   model->buffers[1] = (ModelBuffer) {
+    .blob = 1,
     .data = model->blobs[1]->data,
     .size = model->blobs[1]->size,
     .stride = sizeof(int)

src/modules/headset/headset_openvr.c

@@ -675,8 +675,19 @@ static ModelData* openvr_newModelData(Device device, bool animated) {
     memcpy(vertices, renderModels[i]->rVertexData, vertexCount * vertexSize);
     memcpy(indices, renderModels[i]->rIndexData, indexCount * sizeof(uint16_t));
 
-    model->buffers[2 * i + 0] = (ModelBuffer) { .data = (char*) vertices, .size = vertexCount * vertexSize, .stride = vertexSize };
-    model->buffers[2 * i + 1] = (ModelBuffer) { .data = (char*) indices, .size = indexCount * sizeof(uint16_t), .stride = sizeof(uint16_t) };
+    model->buffers[2 * i + 0] = (ModelBuffer) {
+      .blob = 0,
+      .size = vertexCount * vertexSize,
+      .stride = vertexSize
+      .data = (char*) vertices
+    };
+
+    model->buffers[2 * i + 1] = (ModelBuffer) {
+      .blob = 1,
+      .size = indexCount * sizeof(uint16_t),
+      .stride = sizeof(uint16_t),
+      .data = (char*) indices
+    };
 
     vertices += vertexCount * vertexSize / sizeof(float);
     indices += indexCount;

src/modules/headset/headset_vrapi.c

@@ -480,36 +480,48 @@ static struct ModelData* vrapi_newModelData(Device device, bool animated) {
   model->blobs[1] = lovrBlobCreate(inverseBindMatrices, model->jointCount * 16 * sizeof(float), "Hand Mesh Inverse Bind Matrices");
 
   model->buffers[0] = (ModelBuffer) {
+    .blob = 0,
+    .offset = (char*) mesh->vertexPositions - (char*) mesh,
     .data = (char*) mesh->VertexPositions,
     .size = sizeof(mesh->VertexPositions),
     .stride = sizeof(mesh->VertexPositions[0])
   };
 
   model->buffers[1] = (ModelBuffer) {
+    .blob = 0,
+    .offset = (char*) mesh->vertexNormals - (char*) mesh,
     .data = (char*) mesh->VertexNormals,
     .size = sizeof(mesh->VertexNormals),
     .stride = sizeof(mesh->VertexNormals[0]),
   };
 
   model->buffers[2] = (ModelBuffer) {
+    .blob = 0,
+    .offset = (char*) mesh->vertexUV0 - (char*) mesh,
     .data = (char*) mesh->VertexUV0,
     .size = sizeof(mesh->VertexUV0),
     .stride = sizeof(mesh->VertexUV0[0]),
   };
 
   model->buffers[3] = (ModelBuffer) {
+    .blob = 0,
+    .offset = (char*) mesh->BlendIndices - (char*) mesh,
     .data = (char*) mesh->BlendIndices,
     .size = sizeof(mesh->BlendIndices),
     .stride = sizeof(mesh->BlendIndices[0]),
   };
 
   model->buffers[4] = (ModelBuffer) {
+    .blob = 0,
+    .offset = (char*) mesh->BlendWeights - (char*) mesh,
     .data = (char*) mesh->BlendWeights,
     .size = sizeof(mesh->BlendWeights),
     .stride = sizeof(mesh->BlendWeights[0]),
   };
 
   model->buffers[5] = (ModelBuffer) {
+    .blob = 0,
+    .offset = (char*) mesh->Indices - (char*) mesh,
     .data = (char*) mesh->Indices,
     .size = sizeof(mesh->Indices),
     .stride = sizeof(mesh->Indices[0])