Primitives: use NoInit constructors for index and vertex arrays.

The NoInit constructor no longer results in an Array with a custom
deleter which would prevent the resulting MeshData from being used in
plugins, and all contents are subsequently overwritten, so there's no
reason to not use it.

src/Magnum/Primitives/Circle.cpp

@@ -60,7 +60,7 @@ Trade::MeshData circle2DSolid(const UnsignedInt segments, const Circle2DFlags fl
     else
         attributes = Trade::meshAttributeDataNonOwningArray(AttributeData2D);
     const std::size_t stride = attributes[0].stride();
-    Containers::Array<char> vertexData{stride*(segments + 2)};
+    Containers::Array<char> vertexData{NoInit, stride*(segments + 2)};
 
     /* Fill positions */
     Containers::StridedArrayView1D<Vector2> positions{vertexData,
@@ -101,7 +101,7 @@ Trade::MeshData circle2DWireframe(const UnsignedInt segments) {
     CORRADE_ASSERT(segments >= 3, "Primitives::circle2DWireframe(): expected at least three segments but got" << segments,
         (Trade::MeshData{MeshPrimitive::LineLoop, 0}));
 
-    Containers::Array<char> vertexData{segments*sizeof(Vector2)};
+    Containers::Array<char> vertexData{NoInit, segments*sizeof(Vector2)};
     auto positions = Containers::arrayCast<Vector2>(vertexData);
 
     /* Points on circle */
@@ -222,7 +222,7 @@ Trade::MeshData circle3DWireframe(const UnsignedInt segments) {
     CORRADE_ASSERT(segments >= 3, "Primitives::circle3DWireframe(): expected at least three segments but got" << segments,
         (Trade::MeshData{MeshPrimitive::LineLoop, 0}));
 
-    Containers::Array<char> vertexData{segments*sizeof(Vector3)};
+    Containers::Array<char> vertexData{NoInit, segments*sizeof(Vector3)};
     auto positions = Containers::arrayCast<Vector3>(vertexData);
 
     /* Points on circle */

src/Magnum/Primitives/Gradient.cpp

@@ -52,7 +52,7 @@ constexpr Trade::MeshAttributeData Attributes2D[]{
 }
 
 Trade::MeshData gradient2D(const Vector2& a, const Color4& colorA, const Vector2& b, const Color4& colorB) {
-    Containers::Array<char> vertexData{sizeof(Vertex2D)*4};
+    Containers::Array<char> vertexData{NoInit, sizeof(Vertex2D)*4};
     auto vertices = Containers::arrayCast<Vertex2D>(vertexData);
     vertices[0].position = { 1.0f, -1.0f};
     vertices[1].position = { 1.0f,  1.0f};
@@ -105,7 +105,7 @@ constexpr Trade::MeshAttributeData Attributes3D[]{
 }
 
 Trade::MeshData gradient3D(const Vector3& a, const Color4& colorA, const Vector3& b, const Color4& colorB) {
-    Containers::Array<char> vertexData{sizeof(Vertex3D)*4};
+    Containers::Array<char> vertexData{NoInit, sizeof(Vertex3D)*4};
     auto vertices = Containers::arrayCast<Vertex3D>(vertexData);
     vertices[0].position = { 1.0f, -1.0f, 0};
     vertices[1].position = { 1.0f,  1.0f, 0};

src/Magnum/Primitives/Grid.cpp

@@ -37,7 +37,7 @@ Trade::MeshData grid3DSolid(const Vector2i& subdivisions, const GridFlags flags)
     const Vector2i faceCount = subdivisions + Vector2i{1};
 
     /* Indices */
-    Containers::Array<char> indexData{std::size_t(faceCount.product()*6)*sizeof(UnsignedInt)};
+    Containers::Array<char> indexData{NoInit, std::size_t(faceCount.product()*6)*sizeof(UnsignedInt)};
     auto indices = Containers::arrayCast<UnsignedInt>(indexData);
     {
         std::size_t i = 0;
@@ -72,7 +72,7 @@ Trade::MeshData grid3DSolid(const Vector2i& subdivisions, const GridFlags flags)
         stride += sizeof(Vector2);
         ++attributeCount;
     }
-    Containers::Array<char> vertexData{stride*vertexCount.product()};
+    Containers::Array<char> vertexData{NoInit, stride*vertexCount.product()};
     Containers::Array<Trade::MeshAttributeData> attributes{attributeCount};
     std::size_t attributeIndex = 0;
     std::size_t attributeOffset = 0;
@@ -143,7 +143,7 @@ Trade::MeshData grid3DWireframe(const Vector2i& subdivisions) {
     const Vector2i vertexCount = subdivisions + Vector2i{2};
     const Vector2i faceCount = subdivisions + Vector2i{1};
 
-    Containers::Array<char> indexData{sizeof(UnsignedInt)*
+    Containers::Array<char> indexData{NoInit, sizeof(UnsignedInt)*
         (vertexCount.y()*(vertexCount.x() - 1)*2 +
         vertexCount.x()*(vertexCount.y() - 1)*2)};
     auto indices = Containers::arrayCast<UnsignedInt>(indexData);
@@ -167,7 +167,7 @@ Trade::MeshData grid3DWireframe(const Vector2i& subdivisions) {
         }
     }
 
-    Containers::Array<char> vertexData{sizeof(Vector3)*vertexCount.product()};
+    Containers::Array<char> vertexData{NoInit, sizeof(Vector3)*vertexCount.product()};
     auto positions = Containers::arrayCast<Vector3>(vertexData);
     {
         std::size_t i = 0;

src/Magnum/Primitives/Icosphere.cpp

@@ -93,7 +93,7 @@ Trade::MeshData icosphereSolid(const UnsignedInt subdivisions) {
     const std::size_t indexCount = Containers::arraySize(Indices)*(std::size_t{1} << subdivisions*2);
     const std::size_t vertexCount = Containers::arraySize(Vertices) + ((indexCount - Containers::arraySize(Indices))/3);
 
-    Containers::Array<char> indexData{indexCount*sizeof(UnsignedInt)};
+    Containers::Array<char> indexData{NoInit, indexCount*sizeof(UnsignedInt)};
     auto indices = Containers::arrayCast<UnsignedInt>(indexData);
     std::memcpy(indices.begin(), Indices, sizeof(Indices));
 

src/Magnum/Primitives/Line.cpp

@@ -42,7 +42,7 @@ constexpr Trade::MeshAttributeData Attributes2D[]{
 }
 
 Trade::MeshData line2D(const Vector2& a, const Vector2& b) {
-    Containers::Array<char> vertexData{sizeof(Vector2)*2};
+    Containers::Array<char> vertexData{NoInit, sizeof(Vector2)*2};
     auto positions = Containers::arrayCast<Vector2>(vertexData);
     positions[0] = a;
     positions[1] = b;
@@ -61,7 +61,7 @@ constexpr Trade::MeshAttributeData Attributes3D[]{
 }
 
 Trade::MeshData line3D(const Vector3& a, const Vector3& b) {
-    Containers::Array<char> vertexData{sizeof(Vector3)*2};
+    Containers::Array<char> vertexData{NoInit, sizeof(Vector3)*2};
     auto positions = Containers::arrayCast<Vector3>(vertexData);
     positions[0] = a;
     positions[1] = b;