GPv3: Array modifier

@@ -0,0 +152,4 @@
+    std::optional<blender::Bounds<float3>> bounds = filtered_curves.bounds_min_max();
+    if (bounds.has_value()) {
+      size = bounds.value().max - bounds.value().min;
+      /* Need a minimum size (for flat drawings). */

@@ -0,0 +161,4 @@
+    float3x3 rand;
+    for (int j = 0; j < 3; j++) {
+      const uint3 primes(2, 3, 7);
+      double3 offset(0.0, 0.0, 0.0);

@@ -0,0 +180,4 @@
+      }
+    }
+    /* Calculate Random matrix. */
+    float3 loc, rot;

@@ -0,0 +192,4 @@
+  float4x4 current_offset = float4x4::identity();
+  for (const int elem_id : IndexRange(1, mmd.count)) {
+    float4x4 mat, mat_offset;
+    get_array_matrix(ob, mmd, elem_id, mat, mat_offset);

@@ -0,0 +103,4 @@
+    offset = float3(0.0f);
+  }
+
+  const float4x4 r_mat = math::from_loc_rot_scale<float4x4, float3, 3>(offset, rot, scale);

@@ -0,0 +111,4 @@
+    if (mmd.flag & MOD_GREASE_PENCIL_ARRAY_USE_OFFSET) {
+      mat_offset[3] += mmd.offset;
+    }
+    obinv = math::invert(float4x4(ob.object_to_world));

@@ -0,0 +115,4 @@
+
+    return mat_offset * obinv * float4x4(mmd.object->object_to_world);
+  }
+  else {

@@ -0,0 +162,4 @@
+    }
+  }
+
+  auto get_rand_matrix = [&](const int elem_id) {

@@ -0,0 +241,4 @@
+     */
+    bke::CurvesGeometry copy = bke::CurvesGeometry(src_curves);
+
+    drawing.strokes_for_write() = create_array_copies(*ctx.object, mmd, src_curves, copy);

@@ -0,0 +247,4 @@
+    bke::CurvesGeometry masked_curves = bke::curves_copy_curve_selection(
+        src_curves, curves_mask, {});
+
+    drawing.strokes_for_write() = create_array_copies(*ctx.object, mmd, src_curves, masked_curves);