Cleanup: spelling

72 files changed, 112 insertions, 104 deletions

diff --git a/source/blender/blenkernel/intern/DerivedMesh.cc b/source/blender/blenkernel/intern/DerivedMesh.cc
index 4aa7cfae009..9f51ef5292f 100644
--- a/source/blender/blenkernel/intern/DerivedMesh.cc
+++ b/source/blender/blenkernel/intern/DerivedMesh.cc
@@ -359,7 +359,7 @@ void DM_init(DerivedMesh *dm,
   dm->needsFree = 1;
   dm->dirty = (DMDirtyFlag)0;
 
-  /* don't use CustomData_reset(...); because we dont want to touch customdata */
+  /* Don't use CustomData_reset(...); because we don't want to touch custom-data. */
   copy_vn_i(dm->vertData.typemap, CD_NUMTYPES, -1);
   copy_vn_i(dm->edgeData.typemap, CD_NUMTYPES, -1);
   copy_vn_i(dm->faceData.typemap, CD_NUMTYPES, -1);
diff --git a/source/blender/blenkernel/intern/editmesh_tangent.c b/source/blender/blenkernel/intern/editmesh_tangent.c
index 9656c20f0be..d849f4ab37d 100644
--- a/source/blender/blenkernel/intern/editmesh_tangent.c
+++ b/source/blender/blenkernel/intern/editmesh_tangent.c
@@ -341,7 +341,7 @@ void BKE_editmesh_loop_tangent_calc(BMEditMesh *em,
 
     /* map faces to quads */
     if (em->tottri != bm->totface) {
-      /* over alloc, since we dont know how many ngon or quads we have */
+      /* Over allocate, since we don't know how many ngon or quads we have. */
 
       /* map fake face index to looptri */
       face_as_quad_map = MEM_mallocN(sizeof(int) * totface, __func__);
diff --git a/source/blender/blenkernel/intern/fluid.c b/source/blender/blenkernel/intern/fluid.c
index 7fe009d51ca..4c85fda4a37 100644
--- a/source/blender/blenkernel/intern/fluid.c
+++ b/source/blender/blenkernel/intern/fluid.c
@@ -2310,7 +2310,7 @@ static void adaptive_domain_adjust(
                                 z - fds->res_min[2]);
         max_den = (fuel) ? MAX2(density[index], fuel[index]) : density[index];
 
-        /* check high resolution bounds if max density isnt already high enough */
+        /* Check high resolution bounds if max density isn't already high enough. */
         if (max_den < fds->adapt_threshold && fds->flags & FLUID_DOMAIN_USE_NOISE && fds->fluid) {
           int i, j, k;
           /* high res grid index */
diff --git a/source/blender/blenkernel/intern/mesh.c b/source/blender/blenkernel/intern/mesh.c
index e7a16463d87..ddbc7e7d1ef 100644
--- a/source/blender/blenkernel/intern/mesh.c
+++ b/source/blender/blenkernel/intern/mesh.c
@@ -881,7 +881,7 @@ Mesh *BKE_mesh_new_nomain(
       NULL, ID_ME, BKE_idtype_idcode_to_name(ID_ME), LIB_ID_CREATE_LOCALIZE);
   BKE_libblock_init_empty(&mesh->id);
 
-  /* don't use CustomData_reset(...); because we dont want to touch customdata */
+  /* Don't use CustomData_reset(...); because we don't want to touch custom-data. */
   copy_vn_i(mesh->vdata.typemap, CD_NUMTYPES, -1);
   copy_vn_i(mesh->edata.typemap, CD_NUMTYPES, -1);
   copy_vn_i(mesh->fdata.typemap, CD_NUMTYPES, -1);
diff --git a/source/blender/blenkernel/intern/mesh_tangent.c b/source/blender/blenkernel/intern/mesh_tangent.c
index c8f15fef71a..2e22e521a13 100644
--- a/source/blender/blenkernel/intern/mesh_tangent.c
+++ b/source/blender/blenkernel/intern/mesh_tangent.c
@@ -635,7 +635,7 @@ void BKE_mesh_calc_loop_tangent_ex(const MVert *mvert,
 
     /* map faces to quads */
     if (looptri_len != mpoly_len) {
-      /* over alloc, since we dont know how many ngon or quads we have */
+      /* Over allocate, since we don't know how many ngon or quads we have. */
 
       /* map fake face index to looptri */
       face_as_quad_map = MEM_mallocN(sizeof(int) * looptri_len, __func__);
diff --git a/source/blender/blenlib/BLI_endian_switch_inline.h b/source/blender/blenlib/BLI_endian_switch_inline.h
index 70d428147e2..d42126fbe61 100644
--- a/source/blender/blenlib/BLI_endian_switch_inline.h
+++ b/source/blender/blenlib/BLI_endian_switch_inline.h
@@ -22,7 +22,7 @@ extern "C" {
 
 /* only include from header */
 #ifndef __BLI_ENDIAN_SWITCH_H__
-#  error "this file isnt to be directly included"
+#  error "this file isn't to be directly included"
 #endif
 
 /** \file
diff --git a/source/blender/blenlib/BLI_link_utils.h b/source/blender/blenlib/BLI_link_utils.h
index a877860cd8d..e1e4a8dbd4a 100644
--- a/source/blender/blenlib/BLI_link_utils.h
+++ b/source/blender/blenlib/BLI_link_utils.h
@@ -21,7 +21,7 @@
  * \brief Single link-list utility macros. (header only api).
  *
  * Use this api when the structure defines its own ``next`` pointer
- * and a double linked list such as #ListBase isnt needed.
+ * and a double linked list such as #ListBase isn't needed.
  */
 
 #define BLI_LINKS_PREPEND(list, link) \
diff --git a/source/blender/blenlib/intern/BLI_memiter.c b/source/blender/blenlib/intern/BLI_memiter.c
index 428dd1e2ad8..3f255ce0e16 100644
--- a/source/blender/blenlib/intern/BLI_memiter.c
+++ b/source/blender/blenlib/intern/BLI_memiter.c
@@ -58,7 +58,7 @@ typedef intptr_t offset_t;
  * typically we rely on the 'count' to avoid iterating past the end. */
 // #define USE_TERMINATE_PARANOID
 
-/* Currently totalloc isnt used. */
+/* Currently totalloc isn't used. */
 // #define USE_TOTALLOC
 
 /* pad must be power of two */
diff --git a/source/blender/blenlib/intern/BLI_mempool.c b/source/blender/blenlib/intern/BLI_mempool.c
index e5868abbe2c..75f934c1fb8 100644
--- a/source/blender/blenlib/intern/BLI_mempool.c
+++ b/source/blender/blenlib/intern/BLI_mempool.c
@@ -76,7 +76,7 @@
  */
 #define USEDWORD MAKE_ID('u', 's', 'e', 'd')
 
-/* currently totalloc isnt used */
+/* Currently totalloc isn't used. */
 // #define USE_TOTALLOC
 
 /* optimize pool size */
diff --git a/source/blender/blenlib/intern/array_store.c b/source/blender/blenlib/intern/array_store.c
index cc1d6df10f5..b694f9c7fc0 100644
--- a/source/blender/blenlib/intern/array_store.c
+++ b/source/blender/blenlib/intern/array_store.c
@@ -1289,7 +1289,7 @@ static BChunkList *bchunk_list_from_data_merge(const BArrayInfo *info,
 
     BLI_assert(i_prev <= data_len);
     for (size_t i = i_prev; i < data_len;) {
-      /* Assumes exiting chunk isnt a match! */
+      /* Assumes exiting chunk isn't a match! */
 
       const BChunkRef *cref_found = table_lookup(
           info, table, table_len, i_table_start, data, data_len, i, table_hash_array);
@@ -1317,7 +1317,7 @@ static BChunkList *bchunk_list_from_data_merge(const BArrayInfo *info,
           BChunk *chunk_found = cref_found->link;
 
           if (bchunk_data_compare(chunk_found, data, data_len, i_prev)) {
-            /* may be useful to remove table data, assuming we dont have
+            /* May be useful to remove table data, assuming we don't have
              * repeating memory where it would be useful to re-use chunks. */
             i += chunk_found->data_len;
             bchunk_list_append(info, bs_mem, chunk_list, chunk_found);
diff --git a/source/blender/blenlib/intern/array_utils.c b/source/blender/blenlib/intern/array_utils.c
index 17ee0eecc6b..57302f1ff81 100644
--- a/source/blender/blenlib/intern/array_utils.c
+++ b/source/blender/blenlib/intern/array_utils.c
@@ -193,7 +193,7 @@ void _bli_array_binary_or(
  * \param span_step: Indices to iterate over,
  * initialize both values to the array length to initialize iteration.
  * \param r_span_len: The length of the span, useful when \a use_wrap is enabled,
- * where calculating the length isnt a simple subtraction.
+ * where calculating the length isn't a simple subtraction.
  */
 bool _bli_array_iter_span(const void *arr,
                           unsigned int arr_len,
diff --git a/source/blender/blenlib/intern/math_solvers.c b/source/blender/blenlib/intern/math_solvers.c
index 85900dc32a6..131afc19f28 100644
--- a/source/blender/blenlib/intern/math_solvers.c
+++ b/source/blender/blenlib/intern/math_solvers.c
@@ -167,7 +167,7 @@ bool BLI_tridiagonal_solve_cyclic(
     return false;
   }
 
-  /* prepare the noncyclic system; relies on tridiagonal_solve ignoring values */
+  /* Prepare the non-cyclic system; relies on tridiagonal_solve ignoring values. */
   memcpy(b2, b, bytes);
   b2[0] -= a0;
   b2[count - 1] -= cN;
diff --git a/source/blender/bmesh/intern/bmesh_interp.c b/source/blender/bmesh/intern/bmesh_interp.c
index 6857a1f3929..288c5fa8158 100644
--- a/source/blender/bmesh/intern/bmesh_interp.c
+++ b/source/blender/bmesh/intern/bmesh_interp.c
@@ -939,7 +939,7 @@ void BM_data_layer_free(BMesh *bm, CustomData *data, int type)
   data->pool = NULL;
 
   has_layer = CustomData_free_layer_active(data, type, 0);
-  /* assert because its expensive to realloc - better not do if layer isnt present */
+  /* Assert because its expensive to realloc - better not do if layer isn't present. */
   BLI_assert(has_layer != false);
   UNUSED_VARS_NDEBUG(has_layer);
 
@@ -961,7 +961,7 @@ void BM_data_layer_free_n(BMesh *bm, CustomData *data, int type, int n)
   data->pool = NULL;
 
   has_layer = CustomData_free_layer(data, type, 0, CustomData_get_layer_index_n(data, type, n));
-  /* assert because its expensive to realloc - better not do if layer isnt present */
+  /* Assert because its expensive to realloc - better not do if layer isn't present. */
   BLI_assert(has_layer != false);
   UNUSED_VARS_NDEBUG(has_layer);
 
diff --git a/source/blender/bmesh/intern/bmesh_iterators.c b/source/blender/bmesh/intern/bmesh_iterators.c
index c81d4f9b67c..ff6274cff12 100644
--- a/source/blender/bmesh/intern/bmesh_iterators.c
+++ b/source/blender/bmesh/intern/bmesh_iterators.c
@@ -158,7 +158,7 @@ int BMO_iter_as_array(BMOpSlot slot_args[BMO_OP_MAX_SLOTS],
 /**
  * \brief Iterator as Array
  *
- * Allocates a new array, has the advantage that you dont need to know the size ahead of time.
+ * Allocates a new array, has the advantage that you don't need to know the size ahead of time.
  *
  * Takes advantage of less common iterator usage to avoid counting twice,
  * which you might end up doing when #BM_iter_as_array is used.
@@ -410,7 +410,7 @@ int BM_iter_mesh_count_flag(const char itype, BMesh *bm, const char hflag, const
  */
 
 /* see bug T36923 for why we need this,
- * allow adding but not removing, this isnt _totally_ safe since
+ * allow adding but not removing, this isn't _totally_ safe since
  * you could add/remove within the same loop, but catches common cases
  */
 #ifdef DEBUG
diff --git a/source/blender/bmesh/operators/bmo_connect.c b/source/blender/bmesh/operators/bmo_connect.c
index b52c26a65f0..0f0427373d9 100644
--- a/source/blender/bmesh/operators/bmo_connect.c
+++ b/source/blender/bmesh/operators/bmo_connect.c
@@ -58,7 +58,7 @@ static int bm_face_connect_verts(BMesh *bm, BMFace *f, const bool check_degenera
   l_iter = l_first = BM_FACE_FIRST_LOOP(f);
   do {
     if (BMO_vert_flag_test(bm, l_iter->v, VERT_INPUT) &&
-        /* ensure this vertex isnt part of a contiguous group */
+        /* Ensure this vertex isn't part of a contiguous group. */
         ((BMO_vert_flag_test(bm, l_iter->prev->v, VERT_INPUT) == 0) ||
          (BMO_vert_flag_test(bm, l_iter->next->v, VERT_INPUT) == 0))) {
       if (!l_tag_prev) {
diff --git a/source/blender/bmesh/operators/bmo_fill_grid.c b/source/blender/bmesh/operators/bmo_fill_grid.c
index df15778558b..bb07a247a4e 100644
--- a/source/blender/bmesh/operators/bmo_fill_grid.c
+++ b/source/blender/bmesh/operators/bmo_fill_grid.c
@@ -586,8 +586,8 @@ static bool bm_edge_test_cb(BMEdge *e, void *bm_v)
 
 static bool bm_edge_test_rail_cb(BMEdge *e, void *UNUSED(bm_v))
 {
-  /* normally operators dont check for hidden state
-   * but alternative would be to pass slot of rail edges */
+  /* Normally operators don't check for hidden state
+   * but alternative would be to pass slot of rail edges. */
   if (BM_elem_flag_test(e, BM_ELEM_HIDDEN)) {
     return false;
   }
diff --git a/source/blender/bmesh/operators/bmo_removedoubles.c b/source/blender/bmesh/operators/bmo_removedoubles.c
index 361b10520da..8cc0bfadbda 100644
--- a/source/blender/bmesh/operators/bmo_removedoubles.c
+++ b/source/blender/bmesh/operators/bmo_removedoubles.c
@@ -599,7 +599,7 @@ void bmo_collapse_uvs_exec(BMesh *bm, BMOperator *op)
   const short oflag = EDGE_MARK;
   int i;
 
-  /* check flags dont change once set */
+  /* Check flags don't change once set. */
 #ifndef NDEBUG
   int tot_test;
 #endif
diff --git a/source/blender/bmesh/operators/bmo_subdivide.c b/source/blender/bmesh/operators/bmo_subdivide.c
index be996e6ffe4..883420e59f6 100644
--- a/source/blender/bmesh/operators/bmo_subdivide.c
+++ b/source/blender/bmesh/operators/bmo_subdivide.c
@@ -1344,7 +1344,7 @@ void BM_mesh_esubdivide(BMesh *bm,
 {
   BMOperator op;
 
-  /* use_sphere isnt exposed here since its only used for new primitives */
+  /* `use_sphere` isn't exposed here since its only used for new primitives. */
   BMO_op_initf(bm,
                &op,
                BMO_FLAG_DEFAULTS,
diff --git a/source/blender/bmesh/operators/bmo_subdivide_edgering.c b/source/blender/bmesh/operators/bmo_subdivide_edgering.c
index d72960adf89..38a27b811b0 100644
--- a/source/blender/bmesh/operators/bmo_subdivide_edgering.c
+++ b/source/blender/bmesh/operators/bmo_subdivide_edgering.c
@@ -932,7 +932,7 @@ static void bm_edgering_pair_order(BMesh *bm,
     BLI_assert(bm_edgering_pair_order_is_flipped(bm, el_store_a, el_store_b) == false);
   }
   else {
-    /* if we dont share and edge - flip */
+    /* If we don't share and edge - flip. */
     BMEdge *e = BM_edge_exists(((LinkData *)lb_a->first)->data, ((LinkData *)lb_b->first)->data);
     if (e == NULL || !BMO_edge_flag_test(bm, e, EDGE_RING)) {
       BM_edgeloop_flip(bm, el_store_b);
diff --git a/source/blender/bmesh/tools/bmesh_decimate_collapse.c b/source/blender/bmesh/tools/bmesh_decimate_collapse.c
index 92ca8e38737..869856d0c5b 100644
--- a/source/blender/bmesh/tools/bmesh_decimate_collapse.c
+++ b/source/blender/bmesh/tools/bmesh_decimate_collapse.c
@@ -939,7 +939,7 @@ static bool bm_edge_collapse_is_degenerate_topology(BMEdge *e_first)
  * intended for speed over flexibility.
  * can only collapse edges connected to (1, 2) tris.
  *
- * Important - dont add vert/edge/face data on collapsing!
+ * Important - don't add vert/edge/face data on collapsing!
  *
  * \param r_e_clear_other: Let caller know what edges we remove besides \a e_clear
  * \param customdata_flag: Merge factor, scales from 0 - 1 ('v_clear' -> 'v_other')
@@ -1394,7 +1394,7 @@ void BM_mesh_decimate_collapse(BMesh *bm,
        * \note
        * - `eheap_table[e_index_mirr]` is only removed from the heap at the last moment
        *   since its possible (in theory) for collapsing `e` to remove `e_mirr`.
-       * - edges sharing a vertex are ignored, so the pivot vertex isnt moved to one side.
+       * - edges sharing a vertex are ignored, so the pivot vertex isn't moved to one side.
        */
 
       BMEdge *e = BLI_heap_pop_min(eheap);
diff --git a/source/blender/bmesh/tools/bmesh_decimate_dissolve.c b/source/blender/bmesh/tools/bmesh_decimate_dissolve.c
index 2254b46f860..4a024f745ed 100644
--- a/source/blender/bmesh/tools/bmesh_decimate_dissolve.c
+++ b/source/blender/bmesh/tools/bmesh_decimate_dissolve.c
@@ -401,7 +401,7 @@ void BM_mesh_decimate_dissolve_ex(BMesh *bm,
       earray[i] = e_iter;
     }
     /* Remove all edges/verts left behind from dissolving,
-     * NULL'ing the vertex array so we dont re-use. */
+     * NULL'ing the vertex array so we don't re-use. */
     for (i = bm->totedge - 1; i != -1; i--) {
       e_iter = earray[i];
 
diff --git a/source/blender/bmesh/tools/bmesh_decimate_unsubdivide.c b/source/blender/bmesh/tools/bmesh_decimate_unsubdivide.c
index e2741b806c2..0a512fdd592 100644
--- a/source/blender/bmesh/tools/bmesh_decimate_unsubdivide.c
+++ b/source/blender/bmesh/tools/bmesh_decimate_unsubdivide.c
@@ -77,12 +77,12 @@ static bool bm_vert_dissolve_fan_test(BMVert *v)
 
 static bool bm_vert_dissolve_fan(BMesh *bm, BMVert *v)
 {
-  /* collapse under 2 conditions.
+  /* Collapse under 2 conditions:
    * - vert connects to 4 manifold edges (and 4 faces).
    * - vert connects to 1 manifold edge, 2 boundary edges (and 2 faces).
    *
    * This covers boundary verts of a quad grid and center verts.
-   * note that surrounding faces dont have to be quads.
+   * note that surrounding faces don't have to be quads.
    */
 
   BMIter iter;
diff --git a/source/blender/compositor/COM_defines.h b/source/blender/compositor/COM_defines.h
index a42719aaf09..a05ba531bc2 100644
--- a/source/blender/compositor/COM_defines.h
+++ b/source/blender/compositor/COM_defines.h
@@ -94,7 +94,7 @@ typedef enum OrderOfChunks {
   COM_TO_RANDOM = 1,
   /** \brief no ordering */
   COM_TO_TOP_DOWN = 2,
-  /** \brief experimental ordering with 9 hotspots */
+  /** \brief experimental ordering with 9 hot-spots. */
   COM_TO_RULE_OF_THIRDS = 3,
 } OrderOfChunks;
 
diff --git a/source/blender/compositor/intern/COM_WorkScheduler.cc b/source/blender/compositor/intern/COM_WorkScheduler.cc
index f19c54991cd..71f062ed5bf 100644
--- a/source/blender/compositor/intern/COM_WorkScheduler.cc
+++ b/source/blender/compositor/intern/COM_WorkScheduler.cc
@@ -35,7 +35,7 @@
 #include "BKE_global.h"
 
 #if COM_CURRENT_THREADING_MODEL == COM_TM_NOTHREAD
-#  ifndef DEBUG /* test this so we dont get warnings in debug builds */
+#  ifndef DEBUG /* Test this so we don't get warnings in debug builds. */
 #    warning COM_CURRENT_THREADING_MODEL COM_TM_NOTHREAD is activated. Use only for debugging.
 #  endif
 #elif COM_CURRENT_THREADING_MODEL == COM_TM_QUEUE
diff --git a/source/blender/compositor/operations/COM_ColorBalanceLGGOperation.cc b/source/blender/compositor/operations/COM_ColorBalanceLGGOperation.cc
index 934b7e51aee..4b8e1aa0d1b 100644
--- a/source/blender/compositor/operations/COM_ColorBalanceLGGOperation.cc
+++ b/source/blender/compositor/operations/COM_ColorBalanceLGGOperation.cc
@@ -21,7 +21,7 @@
 
 inline float colorbalance_lgg(float in, float lift_lgg, float gamma_inv, float gain)
 {
-  /* 1:1 match with the sequencer with linear/srgb conversions, the conversion isnt pretty
+  /* 1:1 match with the sequencer with linear/srgb conversions, the conversion isn't pretty
    * but best keep it this way, since testing for durian shows a similar calculation
    * without lin/srgb conversions gives bad results (over-saturated shadows) with colors
    * slightly below 1.0. some correction can be done but it ends up looking bad for shadows or
diff --git a/source/blender/datatoc/datatoc.c b/source/blender/datatoc/datatoc.c
index f68d2f8ce13..62b4cee4af0 100644
--- a/source/blender/datatoc/datatoc.c
+++ b/source/blender/datatoc/datatoc.c
@@ -112,7 +112,7 @@ int main(int argc, char **argv)
     fprintf(fpout, "%3d,", getc(fpin));
   }
 
-  /* trailing NULL terminator, this isnt needed in some cases and
+  /* Trailing NULL terminator, this isn't needed in some cases and
    * won't be taken into account by the size variable, but its useful when dealing with
    * NULL terminated string data */
   fprintf(fpout, "0\n};\n\n");
diff --git a/source/blender/draw/engines/overlay/overlay_image.c b/source/blender/draw/engines/overlay/overlay_image.c
index 844a0eb8351..ada07499d1c 100644
--- a/source/blender/draw/engines/overlay/overlay_image.c
+++ b/source/blender/draw/engines/overlay/overlay_image.c
@@ -164,7 +164,7 @@ static struct GPUTexture *image_camera_background_texture_get(CameraBGImage *bgp
 
       BKE_image_user_frame_calc(image, iuser, ctime);
       if (image->source == IMA_SRC_SEQUENCE && !(iuser->flag & IMA_USER_FRAME_IN_RANGE)) {
-        /* Frame is out of range, dont show. */
+        /* Frame is out of range, don't show. */
         return NULL;
       }
 
diff --git a/source/blender/draw/engines/overlay/shaders/antialiasing_frag.glsl b/source/blender/draw/engines/overlay/shaders/antialiasing_frag.glsl
index f24aee56bb2..c204949cc45 100644
--- a/source/blender/draw/engines/overlay/shaders/antialiasing_frag.glsl
+++ b/source/blender/draw/engines/overlay/shaders/antialiasing_frag.glsl
@@ -134,7 +134,8 @@ void main()
     fragColor *= line_coverage(dist, line_kernel);
   }
 
-  /* We dont order fragments but use alpha over/alpha under based on current minimum frag depth. */
+  /* We don't order fragments but use alpha over/alpha under based on current minimum frag depth.
+   */
   neighbor_blend(coverage.x, depths.x, neightbor_col0, depth, fragColor);
   neighbor_blend(coverage.y, depths.y, neightbor_col1, depth, fragColor);
   neighbor_blend(coverage.z, depths.z, neightbor_col2, depth, fragColor);
diff --git a/source/blender/draw/engines/overlay/shaders/armature_stick_vert.glsl b/source/blender/draw/engines/overlay/shaders/armature_stick_vert.glsl
index 99bdbfea2be..0a2598fb6b7 100644
--- a/source/blender/draw/engines/overlay/shaders/armature_stick_vert.glsl
+++ b/source/blender/draw/engines/overlay/shaders/armature_stick_vert.glsl
@@ -15,10 +15,10 @@ in uint flag;
 /* ---- Per instance Attrs ---- */
 in vec3 boneStart;
 in vec3 boneEnd;
-in vec4 wireColor; /* alpha encode if we do wire. If 0.0 we dont. */
-in vec4 boneColor; /* alpha encode if we do bone. If 0.0 we dont. */
-in vec4 headColor; /* alpha encode if we do head. If 0.0 we dont. */
-in vec4 tailColor; /* alpha encode if we do tail. If 0.0 we dont. */
+in vec4 wireColor; /* alpha encode if we do wire. If 0.0 we don't. */
+in vec4 boneColor; /* alpha encode if we do bone. If 0.0 we don't. */
+in vec4 headColor; /* alpha encode if we do head. If 0.0 we don't. */
+in vec4 tailColor; /* alpha encode if we do tail. If 0.0 we don't. */
 
 #define do_wire (wireColor.a > 0.0)
 #define is_head bool(flag & POS_HEAD)
diff --git a/source/blender/draw/engines/workbench/workbench_engine.c b/source/blender/draw/engines/workbench/workbench_engine.c
index bd5b61b26e9..0d7f2e67598 100644
--- a/source/blender/draw/engines/workbench/workbench_engine.c
+++ b/source/blender/draw/engines/workbench/workbench_engine.c
@@ -68,7 +68,7 @@ void workbench_engine_init(void *ved)
     wpd->object_id_tx = DRW_texture_pool_query_fullscreen(GPU_R16UI, &draw_engine_workbench);
   }
   else {
-    /* Dont free because it's a pool texture. */
+    /* Don't free because it's a pool texture. */
     wpd->object_id_tx = NULL;
   }
 
diff --git a/source/blender/draw/intern/draw_common.c b/source/blender/draw/intern/draw_common.c
index 132b5274517..d3a90ccfbd0 100644
--- a/source/blender/draw/intern/draw_common.c
+++ b/source/blender/draw/intern/draw_common.c
@@ -279,7 +279,7 @@ DRWView *DRW_view_create_with_zoffset(const DRWView *parent_view,
 
   float viewdist = rv3d->dist;
 
-  /* special exception for ortho camera (viewdist isnt used for perspective cameras) */
+  /* special exception for ortho camera (`viewdist` isn't used for perspective cameras). */
   if (rv3d->persp == RV3D_CAMOB && rv3d->is_persp == false) {
     viewdist = 1.0f / max_ff(fabsf(winmat[0][0]), fabsf(winmat[1][1]));
   }
diff --git a/source/blender/draw/intern/draw_manager.c b/source/blender/draw/intern/draw_manager.c
index 244b0133e64..2655319bbd4 100644
--- a/source/blender/draw/intern/draw_manager.c
+++ b/source/blender/draw/intern/draw_manager.c
@@ -3092,7 +3092,7 @@ void DRW_opengl_context_destroy(void)
 void DRW_opengl_context_enable_ex(bool UNUSED(restore))
 {
   if (DST.gl_context != NULL) {
-    /* IMPORTANT: We dont support immediate mode in render mode!
+    /* IMPORTANT: We don't support immediate mode in render mode!
      * This shall remain in effect until immediate mode supports
      * multiple threads. */
     BLI_ticket_mutex_lock(DST.gl_context_mutex);
diff --git a/source/blender/editors/curve/editcurve_paint.c b/source/blender/editors/curve/editcurve_paint.c
index 889041daacf..48a36ff276d 100644
--- a/source/blender/editors/curve/editcurve_paint.c
+++ b/source/blender/editors/curve/editcurve_paint.c
@@ -650,7 +650,7 @@ static void curve_draw_exec_precalc(wmOperator *op)
   prop = RNA_struct_find_property(op->ptr, "error_threshold");
   if (!RNA_property_is_set(op->ptr, prop)) {
 
-    /* error isnt set so we'll have to calculate it from the pixel values */
+    /* Error isn't set so we'll have to calculate it from the pixel values. */
     BLI_mempool_iter iter;
     const struct StrokeElem *selem, *selem_prev;
 
diff --git a/source/blender/editors/include/ED_transverts.h b/source/blender/editors/include/ED_transverts.h
index bff31149b75..28955da6ef1 100644
--- a/source/blender/editors/include/ED_transverts.h
+++ b/source/blender/editors/include/ED_transverts.h
@@ -50,9 +50,12 @@ bool ED_transverts_poll(struct bContext *C);
 
 /* currently only used for bmesh index values */
 enum {
-  TM_INDEX_ON = 1,    /* tag to make trans verts */
-  TM_INDEX_OFF = 0,   /* don't make verts */
-  TM_INDEX_SKIP = -1, /* dont make verts (when the index values point to trans-verts) */
+  /** Tag to make trans verts. */
+  TM_INDEX_ON = 1,
+  /** Don't make verts. */
+  TM_INDEX_OFF = 0,
+  /** Don't make verts (when the index values point to trans-verts). */
+  TM_INDEX_SKIP = -1,
 };
 
 /* mode flags: */
diff --git a/source/blender/editors/interface/interface.c b/source/blender/editors/interface/interface.c
index c7f5385eac3..fbd7dcd61f2 100644
--- a/source/blender/editors/interface/interface.c
+++ b/source/blender/editors/interface/interface.c
@@ -4162,7 +4162,7 @@ static void ui_def_but_rna__menu(bContext *UNUSED(C), uiLayout *layout, void *bu
   RNA_property_enum_items_gettexted(
       block->evil_C, &but->rnapoin, but->rnaprop, &item_array, NULL, &free);
 
-  /* we dont want nested rows, cols in menus */
+  /* We don't want nested rows, cols in menus. */
   UI_block_layout_set_current(block, layout);
 
   int totitems = 0;
diff --git a/source/blender/editors/interface/interface_handlers.c b/source/blender/editors/interface/interface_handlers.c
index 81da54ade9e..ee5c3f53f5e 100644
--- a/source/blender/editors/interface/interface_handlers.c
+++ b/source/blender/editors/interface/interface_handlers.c
@@ -2097,7 +2097,7 @@ static void ui_apply_but(
       }
     }
     if (data->select_others.elems_len == 0) {
-      /* dont check again */
+      /* Don't check again. */
       data->select_others.elems_len = -1;
     }
 #endif
@@ -4894,7 +4894,7 @@ static bool ui_numedit_but_NUM(uiButNumber *number_but,
     else {
       /* only scale large int buttons */
       non_linear_range_limit = 129.0f;
-      /* larger for ints, we dont need to fine tune them */
+      /* Larger for ints, we don't need to fine tune them. */
       non_linear_pixel_map = 250.0f;
 
       /* prevent large ranges from getting too out of control */
@@ -7779,7 +7779,7 @@ static int ui_do_button(bContext *C, uiBlock *block, uiBut *but, const wmEvent *
         else if (data->multi_data.init == BUTTON_MULTI_INIT_SETUP) {
           /* --> (BUTTON_MULTI_INIT_ENABLE) */
           const float margin_x = DRAG_MULTINUM_THRESHOLD_DRAG_X / sqrtf(block->aspect);
-          /* check if we're dont setting buttons */
+          /* Check if we're don't setting buttons. */
           if ((data->str &&
                ELEM(data->state, BUTTON_STATE_TEXT_EDITING, BUTTON_STATE_NUM_EDITING)) ||
               ((abs(data->multi_data.drag_lock_x - event->x) > margin_x) &&
diff --git a/source/blender/editors/interface/interface_layout.c b/source/blender/editors/interface/interface_layout.c
index 8f90dc7f801..4430d00f2e3 100644
--- a/source/blender/editors/interface/interface_layout.c
+++ b/source/blender/editors/interface/interface_layout.c
@@ -813,7 +813,7 @@ static void ui_item_enum_expand_exec(uiLayout *layout,
     RNA_property_enum_items_gettexted(block->evil_C, ptr, prop, &item_array, NULL, &free);
   }
 
-  /* we dont want nested rows, cols in menus */
+  /* We don't want nested rows, cols in menus. */
   uiLayout *layout_radial = NULL;
   if (radial) {
     if (layout->root->layout == layout) {
diff --git a/source/blender/editors/interface/interface_region_tooltip.c b/source/blender/editors/interface/interface_region_tooltip.c
index 050a14cf574..244cf7622e0 100644
--- a/source/blender/editors/interface/interface_region_tooltip.c
+++ b/source/blender/editors/interface/interface_region_tooltip.c
@@ -240,7 +240,7 @@ static void ui_tooltip_region_draw_cb(const bContext *UNUSED(C), ARegion *region
       fstyle_mono.uifont_id = blf_mono_font;
 
       UI_fontstyle_set(&fstyle_mono);
-      /* XXX, needed because we dont have mono in 'U.uifonts' */
+      /* XXX, needed because we don't have mono in 'U.uifonts' */
       BLF_size(fstyle_mono.uifont_id, fstyle_mono.points * U.pixelsize, U.dpi);
       rgb_float_to_uchar(drawcol, tip_colors[field->format.color_id]);
       UI_fontstyle_draw(&fstyle_mono, &bbox, field->text, drawcol, &fs_params);
diff --git a/source/blender/editors/interface/interface_templates.c b/source/blender/editors/interface/interface_templates.c
index 08895564a26..42b6e771fe4 100644
--- a/source/blender/editors/interface/interface_templates.c
+++ b/source/blender/editors/interface/interface_templates.c
@@ -2083,11 +2083,11 @@ void uiTemplateConstraints(uiLayout *UNUSED(layout), bContext *C, bool use_bone_
     UI_panels_free_instanced(C, region);
     bConstraint *con = (constraints == NULL) ? NULL : constraints->first;
     for (int i = 0; con; i++, con = con->next) {
-      /* Dont show invalid/legacy constraints. */
+      /* Don't show invalid/legacy constraints. */
       if (con->type == CONSTRAINT_TYPE_NULL) {
         continue;
       }
-      /* Dont show temporary constraints (AutoIK and targetless IK constraints). */
+      /* Don't show temporary constraints (AutoIK and target-less IK constraints). */
       if (con->type == CONSTRAINT_TYPE_KINEMATIC) {
         bKinematicConstraint *data = con->data;
         if (data->flag & CONSTRAINT_IK_TEMP) {
@@ -2116,11 +2116,11 @@ void uiTemplateConstraints(uiLayout *UNUSED(layout), bContext *C, bool use_bone_
     /* Assuming there's only one group of instanced panels, update the custom data pointers. */
     Panel *panel = region->panels.first;
     LISTBASE_FOREACH (bConstraint *, con, constraints) {
-      /* Dont show invalid/legacy constraints. */
+      /* Don't show invalid/legacy constraints. */
       if (con->type == CONSTRAINT_TYPE_NULL) {
         continue;
       }
-      /* Dont show temporary constraints (AutoIK and targetless IK constraints). */
+      /* Don't show temporary constraints (AutoIK and target-less IK constraints). */
       if (con->type == CONSTRAINT_TYPE_KINEMATIC) {
         bKinematicConstraint *data = con->data;
         if (data->flag & CONSTRAINT_IK_TEMP) {
diff --git a/source/blender/editors/mask/mask_ops.c b/source/blender/editors/mask/mask_ops.c
index 14f81520b9a..1a6ac8597ae 100644
--- a/source/blender/editors/mask/mask_ops.c
+++ b/source/blender/editors/mask/mask_ops.c
@@ -1475,8 +1475,8 @@ static int delete_exec(bContext *C, wmOperator *UNUSED(op))
       spline = next_spline;
     }
 
-    /* not essential but confuses users when there are keys with no data!
-     * assume if they delete all data from the layer they also dont care about keys */
+    /* Not essential but confuses users when there are keys with no data!
+     * Assume if they delete all data from the layer they also don't care about keys. */
     if (BLI_listbase_is_empty(&mask_layer->splines)) {
       BKE_mask_layer_free_shapes(mask_layer);
     }
diff --git a/source/blender/editors/mesh/editmesh_knife.c b/source/blender/editors/mesh/editmesh_knife.c
index b5ec3f388a0..df0ca6e3cae 100644
--- a/source/blender/editors/mesh/editmesh_knife.c
+++ b/source/blender/editors/mesh/editmesh_knife.c
@@ -2548,7 +2548,7 @@ static void knifetool_finish_ex(KnifeTool_OpData *kcd)
   EDBM_mesh_normals_update(kcd->em);
   EDBM_update_generic(kcd->ob->data, true, true);
 
-  /* re-tessellating makes this invalid, dont use again by accident */
+  /* Re-tessellating makes this invalid, don't use again by accident. */
   knifetool_free_bmbvh(kcd);
 }
 static void knifetool_finish(wmOperator *op)
diff --git a/source/blender/editors/mesh/editmesh_rip.c b/source/blender/editors/mesh/editmesh_rip.c
index 33797573f2b..222d44f85d8 100644
--- a/source/blender/editors/mesh/editmesh_rip.c
+++ b/source/blender/editors/mesh/editmesh_rip.c
@@ -386,7 +386,7 @@ static void edbm_ripsel_deselect_helper(BMesh *bm,
  * use for rebuilding face-fill
  *
  * \note the method currently used fails for edges with 3+ face users and gives
- *       nasty holes in the mesh, there isnt a good way of knowing ahead of time
+ *       nasty holes in the mesh, there isn't a good way of knowing ahead of time
  *       which loops will be split apart (its possible to figure out but quite involved).
  *       So for now this is a known limitation of current rip-fill option.
  */
diff --git a/source/blender/editors/mesh/editmesh_tools.c b/source/blender/editors/mesh/editmesh_tools.c
index 8bb557509e0..ade21f58232 100644
--- a/source/blender/editors/mesh/editmesh_tools.c
+++ b/source/blender/editors/mesh/editmesh_tools.c
@@ -853,7 +853,7 @@ static BMElem *edbm_add_edge_face_exec__tricky_extend_sel(BMesh *bm)
 }
 static void edbm_add_edge_face_exec__tricky_finalize_sel(BMesh *bm, BMElem *ele_desel, BMFace *f)
 {
-  /* now we need to find the edge that isnt connected to this element */
+  /* Now we need to find the edge that isn't connected to this element. */
   BM_select_history_clear(bm);
 
   /* Notes on hidden geometry:
@@ -896,7 +896,7 @@ static void edbm_add_edge_face_exec__tricky_finalize_sel(BMesh *bm, BMElem *ele_
 
 static int edbm_add_edge_face_exec(bContext *C, wmOperator *op)
 {
-  /* when this is used to dissolve we could avoid this, but checking isnt too slow */
+  /* When this is used to dissolve we could avoid this, but checking isn't too slow. */
   bool changed_multi = false;
   ViewLayer *view_layer = CTX_data_view_layer(C);
   uint objects_len = 0;
@@ -4815,11 +4815,11 @@ static bool edbm_fill_grid_prepare(BMesh *bm, int offset, int *span_p, const boo
 
     if (span_calc) {
       /* calculate the span by finding the next corner in 'verts'
-       * we dont know what defines a corner exactly so find the 4 verts
+       * we don't know what defines a corner exactly so find the 4 verts
        * in the loop with the greatest angle.
        * Tag them and use the first tagged vertex to calculate the span.
        *
-       * note: we may have already checked 'edbm_fill_grid_vert_tag_angle()' on each
+       * NOTE: we may have already checked 'edbm_fill_grid_vert_tag_angle()' on each
        * vert, but advantage of de-duplicating is minimal. */
       struct SortPtrByFloat *ele_sort = MEM_mallocN(sizeof(*ele_sort) * verts_len, __func__);
       LinkData *v_link;
diff --git a/source/blender/editors/object/object_bake_api.c b/source/blender/editors/object/object_bake_api.c
index d64769567f7..f651f5bc3fd 100644
--- a/source/blender/editors/object/object_bake_api.c
+++ b/source/blender/editors/object/object_bake_api.c
@@ -156,8 +156,10 @@ static int bake_modal(bContext *C, wmOperator *UNUSED(op), const wmEvent *event)
   return OPERATOR_PASS_THROUGH;
 }
 
-/* for exec() when there is no render job
- * note: this wont check for the escape key being pressed, but doing so isnt threadsafe */
+/**
+ * for exec() when there is no render job
+ * note: this wont check for the escape key being pressed, but doing so isn't thread-safe.
+ */
 static int bake_break(void *UNUSED(rjv))
 {
   if (G.is_break) {
diff --git a/source/blender/editors/physics/particle_edit.c b/source/blender/editors/physics/particle_edit.c
index 1ee17d0e4b0..0ec8238f741 100644
--- a/source/blender/editors/physics/particle_edit.c
+++ b/source/blender/editors/physics/particle_edit.c
@@ -4731,7 +4731,7 @@ static void brush_edit_apply(bContext *C, wmOperator *op, PointerRNA *itemptr)
            (dx != 0 || dy != 0)) ||
       bedit->first) {
     PEData data = bedit->data;
-    data.context = C; /* TODO(mai): why isnt this set in bedit->data? */
+    data.context = C; /* TODO(mai): why isn't this set in bedit->data? */
 
     view3d_operator_needs_opengl(C);
     selected = (short)count_selected_keys(scene, edit);
diff --git a/source/blender/editors/render/render_internal.c b/source/blender/editors/render/render_internal.c
index 1f59e361526..0b5a8db0115 100644
--- a/source/blender/editors/render/render_internal.c
+++ b/source/blender/editors/render/render_internal.c
@@ -788,8 +788,10 @@ static int render_breakjob(void *rjv)
   return 0;
 }
 
-/* for exec() when there is no render job
- * note: this wont check for the escape key being pressed, but doing so isnt threadsafe */
+/**
+ * For exec() when there is no render job
+ * note: this wont check for the escape key being pressed, but doing so isn't thread-safe.
+ */
 static int render_break(void *UNUSED(rjv))
 {
   if (G.is_break) {
diff --git a/source/blender/editors/sculpt_paint/paint_image_proj.c b/source/blender/editors/sculpt_paint/paint_image_proj.c
index f7c0f7718bb..530689ce049 100644
--- a/source/blender/editors/sculpt_paint/paint_image_proj.c
+++ b/source/blender/editors/sculpt_paint/paint_image_proj.c
@@ -1733,7 +1733,7 @@ static float project_paint_uvpixel_mask(const ProjPaintState *ps,
                     ps->mvert_eval[lt_vtri[1]].co,
                     ps->mvert_eval[lt_vtri[2]].co);
 #else
-      /* don't use because some modifiers dont have normal data (subsurf for eg) */
+      /* Don't use because some modifiers don't have normal data (subsurf for eg). */
       copy_v3_v3(no, (float *)ps->dm->getTessFaceData(ps->dm, tri_index, CD_NORMAL));
 #endif
     }
diff --git a/source/blender/editors/space_buttons/buttons_ops.c b/source/blender/editors/space_buttons/buttons_ops.c
index f135c1ee726..c141789f171 100644
--- a/source/blender/editors/space_buttons/buttons_ops.c
+++ b/source/blender/editors/space_buttons/buttons_ops.c
@@ -217,7 +217,7 @@ static int file_browse_exec(bContext *C, wmOperator *op)
     BLI_path_abs(path, id ? ID_BLEND_PATH(bmain, id) : BKE_main_blendfile_path(bmain));
 
     if (BLI_is_dir(path)) {
-      /* Do this first so '//' isnt converted to '//\' on windows. */
+      /* Do this first so '//' isn't converted to '//\' on windows. */
       BLI_path_slash_ensure(path);
       if (is_relative) {
         BLI_strncpy(path, str, FILE_MAX);
diff --git a/source/blender/editors/space_file/file_ops.c b/source/blender/editors/space_file/file_ops.c
index bd6b15bdf74..856bd5b1bc3 100644
--- a/source/blender/editors/space_file/file_ops.c
+++ b/source/blender/editors/space_file/file_ops.c
@@ -452,7 +452,7 @@ static int file_box_select_modal(bContext *C, wmOperator *op, const wmEvent *eve
       for (idx = sel.last; idx >= 0; idx--) {
         const FileDirEntry *file = filelist_file(sfile->files, idx);
 
-        /* dont highlight readonly file (".." or ".") on box select */
+        /* Don't highlight read-only file (".." or ".") on box select. */
         if (FILENAME_IS_CURRPAR(file->relpath)) {
           filelist_entry_select_set(
               sfile->files, file, FILE_SEL_REMOVE, FILE_SEL_HIGHLIGHTED, CHECK_ALL);
diff --git a/source/blender/editors/space_file/filesel.c b/source/blender/editors/space_file/filesel.c
index 7015ca970a3..038b9c11bca 100644
--- a/source/blender/editors/space_file/filesel.c
+++ b/source/blender/editors/space_file/filesel.c
@@ -639,7 +639,7 @@ int ED_fileselect_layout_numfiles(FileLayout *layout, ARegion *region)
    *
    * - *_item: size of each (row|col), (including padding)
    * - *_view: (x|y) size of the view.
-   * - *_over: extra pixels, to take into account, when the fit isnt exact
+   * - *_over: extra pixels, to take into account, when the fit isn't exact
    *   (needed since you may see the end of the previous column and the beginning of the next).
    *
    * Could be more clever and take scrolling into account,
diff --git a/source/blender/editors/space_text/text_draw.c b/source/blender/editors/space_text/text_draw.c
index 883556948e2..8b8034124d9 100644
--- a/source/blender/editors/space_text/text_draw.c
+++ b/source/blender/editors/space_text/text_draw.c
@@ -923,12 +923,12 @@ static void calc_text_rcts(SpaceText *st, ARegion *region, rcti *scroll, rcti *b
     hlstart = (lhlstart * pix_available) / ltexth;
     hlend = (lhlend * pix_available) / ltexth;
 
-    /* the scrollbar is non-linear sized */
+    /* The scrollbar is non-linear sized. */
     if (pix_bardiff > 0) {
       /* the start of the highlight is in the current viewport */
       if (st->runtime.viewlines && lhlstart >= st->top &&
           lhlstart <= st->top + st->runtime.viewlines) {
-        /* speed the progresion of the start of the highlight through the scrollbar */
+        /* Speed the progression of the start of the highlight through the scrollbar. */
         hlstart = (((pix_available - pix_bardiff) * lhlstart) / ltexth) +
                   (pix_bardiff * (lhlstart - st->top) / st->runtime.viewlines);
       }
@@ -949,7 +949,7 @@ static void calc_text_rcts(SpaceText *st, ARegion *region, rcti *scroll, rcti *b
       /* the end of the highlight is in the current viewport */
       if (st->runtime.viewlines && lhlend >= st->top &&
           lhlend <= st->top + st->runtime.viewlines) {
-        /* speed the progresion of the end of the highlight through the scrollbar */
+        /* Speed the progression of the end of the highlight through the scrollbar. */
         hlend = (((pix_available - pix_bardiff) * lhlend) / ltexth) +
                 (pix_bardiff * (lhlend - st->top) / st->runtime.viewlines);
       }
@@ -1433,7 +1433,7 @@ static void draw_brackets(const SpaceText *st, const TextDrawContext *tdc, ARegi
   find = -b;
   stack = 0;
 
-  /* Don't highlight backets if syntax HL is off or bracket in string or comment. */
+  /* Don't highlight brackets if syntax HL is off or bracket in string or comment. */
   if (!linep->format || linep->format[fc] == FMT_TYPE_STRING ||
       linep->format[fc] == FMT_TYPE_COMMENT) {
     return;
diff --git a/source/blender/editors/space_view3d/view3d_iterators.c b/source/blender/editors/space_view3d/view3d_iterators.c
index 91e629147f4..bdb2c3874db 100644
--- a/source/blender/editors/space_view3d/view3d_iterators.c
+++ b/source/blender/editors/space_view3d/view3d_iterators.c
@@ -571,7 +571,7 @@ void armature_foreachScreenBone(struct ViewContext *vc,
       }
       else {
         screen_co_a[0] = IS_CLIPPED; /* weak */
-        /* screen_co_a[1]: intentionally dont set this so we get errors on misuse */
+        /* screen_co_a[1]: intentionally don't set this so we get errors on misuse */
       }
 
       /* project tail location to screenspace */
@@ -581,7 +581,7 @@ void armature_foreachScreenBone(struct ViewContext *vc,
       }
       else {
         screen_co_b[0] = IS_CLIPPED; /* weak */
-        /* screen_co_b[1]: intentionally dont set this so we get errors on misuse */
+        /* screen_co_b[1]: intentionally don't set this so we get errors on misuse */
       }
 
       if (points_proj_tot) { /* at least one point's projection worked */
@@ -623,7 +623,7 @@ void pose_foreachScreenBone(struct ViewContext *vc,
       }
       else {
         screen_co_a[0] = IS_CLIPPED; /* weak */
-        /* screen_co_a[1]: intentionally dont set this so we get errors on misuse */
+        /* screen_co_a[1]: intentionally don't set this so we get errors on misuse */
       }
 
       /* project tail location to screenspace */
@@ -633,7 +633,7 @@ void pose_foreachScreenBone(struct ViewContext *vc,
       }
       else {
         screen_co_b[0] = IS_CLIPPED; /* weak */
-        /* screen_co_b[1]: intentionally dont set this so we get errors on misuse */
+        /* screen_co_b[1]: intentionally don't set this so we get errors on misuse */
       }
 
       if (points_proj_tot) { /* at least one point's projection worked */
diff --git a/source/blender/editors/space_view3d/view3d_utils.c b/source/blender/editors/space_view3d/view3d_utils.c
index 3ef428cfbaf..e3acda9bffb 100644
--- a/source/blender/editors/space_view3d/view3d_utils.c
+++ b/source/blender/editors/space_view3d/view3d_utils.c
@@ -228,7 +228,7 @@ void ED_view3d_polygon_offset(const RegionView3D *rv3d, const float dist)
 
   float viewdist = rv3d->dist;
 
-  /* special exception for ortho camera (viewdist isnt used for perspective cameras) */
+  /* Special exception for orthographic camera (`viewdist` isn't used for perspective cameras). */
   if (dist != 0.0f) {
     if (rv3d->persp == RV3D_CAMOB) {
       if (rv3d->is_persp == false) {
diff --git a/source/blender/editors/transform/transform_convert_mask.c b/source/blender/editors/transform/transform_convert_mask.c
index d60d34d2c5d..45dc6df4fde 100644
--- a/source/blender/editors/transform/transform_convert_mask.c
+++ b/source/blender/editors/transform/transform_convert_mask.c
@@ -480,7 +480,7 @@ void special_aftertrans_update__mask(bContext *C, TransInfo *t)
     }
   }
 
-  /* TODO - dont key all masks... */
+  /* TODO: don't key all masks. */
   if (IS_AUTOKEY_ON(t->scene)) {
     Scene *scene = t->scene;
 
diff --git a/source/blender/editors/transform/transform_convert_node.c b/source/blender/editors/transform/transform_convert_node.c
index 506e8a2bd9b..12c4d0816ae 100644
--- a/source/blender/editors/transform/transform_convert_node.c
+++ b/source/blender/editors/transform/transform_convert_node.c
@@ -115,7 +115,7 @@ void createTransNodeData(TransInfo *t)
     return;
   }
 
-  /* nodes dont support PET and probably never will */
+  /* Nodes don't support PET and probably never will. */
   t->flag &= ~T_PROP_EDIT_ALL;
 
   /* set transform flags on nodes */
diff --git a/source/blender/editors/transform/transform_mode_bend.c b/source/blender/editors/transform/transform_mode_bend.c
index 038f7d48c66..b3b1860f9ec 100644
--- a/source/blender/editors/transform/transform_mode_bend.c
+++ b/source/blender/editors/transform/transform_mode_bend.c
@@ -97,7 +97,7 @@ static void Bend(TransInfo *t, const int UNUSED(mval[2]))
   snapGrid(t, angle_rad);
 #else
   /* hrmf, snapping radius is using 'angle' steps, need to convert to something else
-   * this isnt essential but nicer to give reasonable snapping values for radius */
+   * this isn't essential but nicer to give reasonable snapping values for radius. */
   if (t->tsnap.mode & SCE_SNAP_MODE_INCREMENT) {
     const float radius_snap = 0.1f;
     const float snap_hack = (t->snap[0] * data->warp_init_dist) / radius_snap;
diff --git a/source/blender/editors/transform/transform_mode_edge_slide.c b/source/blender/editors/transform/transform_mode_edge_slide.c
index dff9ded6b29..16c1c05a6f8 100644
--- a/source/blender/editors/transform/transform_mode_edge_slide.c
+++ b/source/blender/editors/transform/transform_mode_edge_slide.c
@@ -944,7 +944,7 @@ static EdgeSlideData *createEdgeSlideVerts_single_side(TransInfo *t, TransDataCo
   /* over alloc */
   sv_array = MEM_callocN(sizeof(TransDataEdgeSlideVert) * bm->totvertsel, "sv_array");
 
-  /* same loop for all loops, weak but we dont connect loops in this case */
+  /* Same loop for all loops, weak but we don't connect loops in this case. */
   loop_nr = 1;
 
   sv_table = MEM_mallocN(sizeof(*sv_table) * bm->totvert, __func__);
diff --git a/source/blender/editors/transform/transform_mode_timetranslate.c b/source/blender/editors/transform/transform_mode_timetranslate.c
index adebc19c2b9..5ad6d04b4de 100644
--- a/source/blender/editors/transform/transform_mode_timetranslate.c
+++ b/source/blender/editors/transform/transform_mode_timetranslate.c
@@ -97,7 +97,7 @@ static void applyTimeTranslateValue(TransInfo *t, const float deltax)
       /* It is assumed that td->extra is a pointer to the AnimData,
        * whose active action is where this keyframe comes from.
        * (this is only valid when not in NLA)
-       * (also: masks and gpencil dont have animadata)
+       * (also: masks and gpencil don't have animadata)
        */
       AnimData *adt = (t->spacetype != SPACE_NLA) ? td->extra : NULL;
 
diff --git a/source/blender/gpu/opengl/gl_debug_layer.cc b/source/blender/gpu/opengl/gl_debug_layer.cc
index 7d2abfb2cff..a5225f98fd9 100644
--- a/source/blender/gpu/opengl/gl_debug_layer.cc
+++ b/source/blender/gpu/opengl/gl_debug_layer.cc
@@ -53,7 +53,7 @@ using GPUvoidptr = void *;
 
 namespace blender::gpu::debug {
 
-/* List of wrapped functions. We dont have to support all of them.
+/* List of wrapped functions. We don't have to support all of them.
  * Some functions might be declared as `extern` in GLEW. We cannot override them in this case.
  * Keep the list in alphabetical order. */
 
diff --git a/source/blender/makesdna/DNA_mesh_types.h b/source/blender/makesdna/DNA_mesh_types.h
index c2337b28e54..af20a63b907 100644
--- a/source/blender/makesdna/DNA_mesh_types.h
+++ b/source/blender/makesdna/DNA_mesh_types.h
@@ -57,7 +57,7 @@ typedef struct EditMeshData {
   /** lazy initialize (when \a vertexCos is set) */
   float const (*vertexNos)[3];
   float const (*polyNos)[3];
-  /** also lazy init but dont depend on \a vertexCos */
+  /** also lazy init but don't depend on \a vertexCos */
   const float (*polyCos)[3];
 } EditMeshData;
 
diff --git a/source/blender/makesdna/DNA_modifier_types.h b/source/blender/makesdna/DNA_modifier_types.h
index 368b1f93e4a..ca6f1467d9c 100644
--- a/source/blender/makesdna/DNA_modifier_types.h
+++ b/source/blender/makesdna/DNA_modifier_types.h
@@ -637,7 +637,7 @@ typedef struct DecimateModifierData {
 
 enum {
   MOD_DECIM_FLAG_INVERT_VGROUP = (1 << 0),
-  /** for collapse only. dont convert tri pairs back to quads */
+  /** For collapse only. don't convert triangle pairs back to quads. */
   MOD_DECIM_FLAG_TRIANGULATE = (1 << 1),
   /** for dissolve only. collapse all verts between 2 faces */
   MOD_DECIM_FLAG_ALL_BOUNDARY_VERTS = (1 << 2),
diff --git a/source/blender/makesdna/DNA_node_types.h b/source/blender/makesdna/DNA_node_types.h
index acbe9da45fd..c61a39a20f0 100644
--- a/source/blender/makesdna/DNA_node_types.h
+++ b/source/blender/makesdna/DNA_node_types.h
@@ -402,7 +402,7 @@ typedef struct bNodeLink {
 #define NODE_LINK_VALID (1 << 1)
 #define NODE_LINK_TEST (1 << 2)           /* free test flag, undefined */
 #define NODE_LINK_TEMP_HIGHLIGHT (1 << 3) /* Link is highlighted for picking. */
-#define NODE_LINK_MUTED (1 << 4)           /* Link is muted. */
+#define NODE_LINK_MUTED (1 << 4)          /* Link is muted. */
 
 /* tree->edit_quality/tree->render_quality */
 #define NTREE_QUALITY_HIGH 0
diff --git a/source/blender/makesrna/intern/rna_define.c b/source/blender/makesrna/intern/rna_define.c
index 019823a7de3..08f52be4257 100644
--- a/source/blender/makesrna/intern/rna_define.c
+++ b/source/blender/makesrna/intern/rna_define.c
@@ -2093,7 +2093,7 @@ void RNA_def_property_string_default(PropertyRNA *prop, const char *value)
 
       if (value == NULL) {
         CLOG_ERROR(&LOG,
-                   "\"%s.%s\", NULL string passed (dont call in this case).",
+                   "\"%s.%s\", NULL string passed (don't call in this case).",
                    srna->identifier,
                    prop->identifier);
         DefRNA.error = true;
@@ -2102,7 +2102,7 @@ void RNA_def_property_string_default(PropertyRNA *prop, const char *value)
 
       if (!value[0]) {
         CLOG_ERROR(&LOG,
-                   "\"%s.%s\", empty string passed (dont call in this case).",
+                   "\"%s.%s\", empty string passed (don't call in this case).",
                    srna->identifier,
                    prop->identifier);
         DefRNA.error = true;
diff --git a/source/blender/makesrna/intern/rna_mesh.c b/source/blender/makesrna/intern/rna_mesh.c
index ed1024116fb..cf7d1f30dde 100644
--- a/source/blender/makesrna/intern/rna_mesh.c
+++ b/source/blender/makesrna/intern/rna_mesh.c
@@ -1424,7 +1424,7 @@ static int rna_MeshPolygonStringPropertyLayer_data_length(PointerRNA *ptr)
   return me->totpoly;
 }
 
-/* XXX, we dont have proper byte string support yet, so for now use the (bytes + 1)
+/* XXX, we don't have proper byte string support yet, so for now use the (bytes + 1)
  * bmesh API exposes correct python/byte-string access. */
 void rna_MeshStringProperty_s_get(PointerRNA *ptr, char *value)
 {
diff --git a/source/blender/modifiers/intern/MOD_decimate.c b/source/blender/modifiers/intern/MOD_decimate.c
index b28b8fd39fc..03db09a5aec 100644
--- a/source/blender/modifiers/intern/MOD_decimate.c
+++ b/source/blender/modifiers/intern/MOD_decimate.c
@@ -113,7 +113,7 @@ static Mesh *modifyMesh(ModifierData *md, const ModifierEvalContext *ctx, Mesh *
   TIMEIT_START(decim);
 #endif
 
-  /* set up front so we dont show invalid info in the UI */
+  /* Set up front so we don't show invalid info in the UI. */
   updateFaceCount(ctx, dmd, mesh->totpoly);
 
   switch (dmd->mode) {
diff --git a/source/blender/modifiers/intern/MOD_dynamicpaint.c b/source/blender/modifiers/intern/MOD_dynamicpaint.c
index 7f57183ff13..3e607e88cdd 100644
--- a/source/blender/modifiers/intern/MOD_dynamicpaint.c
+++ b/source/blender/modifiers/intern/MOD_dynamicpaint.c
@@ -118,7 +118,7 @@ static Mesh *modifyMesh(ModifierData *md, const ModifierEvalContext *ctx, Mesh *
 {
   DynamicPaintModifierData *pmd = (DynamicPaintModifierData *)md;
 
-  /* dont apply dynamic paint on orco mesh stack */
+  /* Don't apply dynamic paint on ORCO mesh stack. */
   if (!(ctx->flag & MOD_APPLY_ORCO)) {
     Scene *scene = DEG_get_evaluated_scene(ctx->depsgraph);
     return dynamicPaint_Modifier_do(pmd, ctx->depsgraph, scene, ctx->object, mesh);
diff --git a/source/blender/modifiers/intern/MOD_meshcache_pc2.c b/source/blender/modifiers/intern/MOD_meshcache_pc2.c
index ea8cc334dd9..485ea6d6e32 100644
--- a/source/blender/modifiers/intern/MOD_meshcache_pc2.c
+++ b/source/blender/modifiers/intern/MOD_meshcache_pc2.c
@@ -75,7 +75,7 @@ static bool meshcache_read_pc2_head(FILE *fp,
     *err_str = "Invalid frame total";
     return false;
   }
-  /* intentionally dont seek back */
+  /* Intentionally don't seek back. */
 
   return true;
 }
diff --git a/source/blender/python/generic/py_capi_utils.c b/source/blender/python/generic/py_capi_utils.c
index 82e65505147..78f5b9ba2cc 100644
--- a/source/blender/python/generic/py_capi_utils.c
+++ b/source/blender/python/generic/py_capi_utils.c
@@ -293,7 +293,7 @@ const char *PyC_StringEnum_FindIDFromValue(const struct PyC_StringEnumItems *ite
   return NULL;
 }
 
-/* silly function, we dont use arg. just check its compatible with __deepcopy__ */
+/* Silly function, we don't use arg. just check its compatible with `__deepcopy__`. */
 int PyC_CheckArgs_DeepCopy(PyObject *args)
 {
   PyObject *dummy_pydict;
diff --git a/source/blender/python/intern/bpy_gizmo_wrap.c b/source/blender/python/intern/bpy_gizmo_wrap.c
index 774ad95c3eb..686a4d88266 100644
--- a/source/blender/python/intern/bpy_gizmo_wrap.c
+++ b/source/blender/python/intern/bpy_gizmo_wrap.c
@@ -118,7 +118,7 @@ static void gizmo_properties_init(wmGizmoType *gzt)
   {
     /* Picky developers will notice that 'bl_targets' won't work with inheritance
      * get direct from the dict to avoid raising a load of attribute errors
-     * (yes this isnt ideal) - campbell. */
+     * (yes this isn't ideal) - campbell. */
     PyObject *py_class_dict = py_class->tp_dict;
     PyObject *bl_target_properties = PyDict_GetItem(py_class_dict,
                                                     bpy_intern_str_bl_target_properties);
diff --git a/source/blender/windowmanager/WM_api.h b/source/blender/windowmanager/WM_api.h
index 9f70d05cc8a..1a505b91ac5 100644
--- a/source/blender/windowmanager/WM_api.h
+++ b/source/blender/windowmanager/WM_api.h
@@ -727,7 +727,7 @@ enum {
 };
 
 /**
- * Identifying jobs by owner alone is unreliable, this isnt saved,
+ * Identifying jobs by owner alone is unreliable, this isn't saved,
  * order can change (keep 0 for 'any').
  */
 enum {
diff --git a/source/blender/windowmanager/intern/wm_operators.c b/source/blender/windowmanager/intern/wm_operators.c
index 660e502a3d7..e8a41b04d84 100644
--- a/source/blender/windowmanager/intern/wm_operators.c
+++ b/source/blender/windowmanager/intern/wm_operators.c
@@ -561,7 +561,7 @@ char *WM_prop_pystring_assign(bContext *C, PointerRNA *ptr, PropertyRNA *prop, i
   char *lhs = C ? wm_prop_pystring_from_context(C, ptr, prop, index) : NULL;
 
   if (lhs == NULL) {
-    /* fallback to bpy.data.foo[id] if we dont find in the context */
+    /* Fallback to `bpy.data.foo[id]` if we don't find in the context. */
     lhs = RNA_path_full_property_py(CTX_data_main(C), ptr, prop, index);
   }
 
@@ -1149,7 +1149,7 @@ int WM_operator_filesel(bContext *C, wmOperator *op, const wmEvent *UNUSED(event
 bool WM_operator_filesel_ensure_ext_imtype(wmOperator *op, const struct ImageFormatData *im_format)
 {
   char filepath[FILE_MAX];
-  /* dont NULL check prop, this can only run on ops with a 'filepath' */
+  /* Don't NULL check prop, this can only run on ops with a 'filepath'. */
   PropertyRNA *prop = RNA_struct_find_property(op->ptr, "filepath");
   RNA_property_string_get(op->ptr, prop, filepath);
   if (BKE_image_path_ensure_ext_from_imformat(filepath, im_format)) {
diff --git a/source/blender/windowmanager/intern/wm_window.c b/source/blender/windowmanager/intern/wm_window.c
index d75ba7865bd..25232e8e3d5 100644
--- a/source/blender/windowmanager/intern/wm_window.c
+++ b/source/blender/windowmanager/intern/wm_window.c
@@ -701,8 +701,8 @@ void wm_window_ghostwindows_ensure(wmWindowManager *wm)
   if (wm_init_state.size_x == 0) {
     wm_get_screensize(&wm_init_state.size_x, &wm_init_state.size_y);
 
-    /* note!, this isnt quite correct, active screen maybe offset 1000s if PX,
-     * we'd need a wm_get_screensize like function that gives offset,
+    /* NOTE: this isn't quite correct, active screen maybe offset 1000s if PX,
+     * we'd need a #wm_get_screensize like function that gives offset,
      * in practice the window manager will likely move to the correct monitor */
     wm_init_state.start_x = 0;
     wm_init_state.start_y = 0;
@@ -1694,7 +1694,7 @@ void WM_event_remove_timer(wmWindowManager *wm, wmWindow *UNUSED(win), wmTimer *
     LISTBASE_FOREACH (wmEvent *, event, &win->event_queue) {
       if (event->customdata == wt) {
         event->customdata = NULL;
-        event->type = EVENT_NONE; /* timer users customdata, dont want NULL == NULL */
+        event->type = EVENT_NONE; /* Timer users customdata, don't want `NULL == NULL`. */
       }
     }
   }