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Mirror Modifier: Add offsets for mirrored UVs 

The mirror modifier now has two fields that specify a -1 to 1 offset for
the U and V axes when mirroring their coordinates.

D1844 by @circuitfox
This commit is contained in:
Campbell Barton 2017-03-30 12:39:51 +11:00
parent 66ef0b8834
commit 31e6249256
Notes: blender-bot 2023-02-14 08:13:33 +01:00 
Referenced by issue #52226, Option not to flip U/V axis with mirror modifier
Referenced by issue #47436, Mirror Modifier: UV-mirror offset option
4 changed files with 25 additions and 2 deletions
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8
release/scripts/startup/bl_ui/properties_data_modifier.py
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@ -569,6 +569,14 @@ class DATA_PT_modifiers(ModifierButtonsPanel, Panel):
col.prop(md, "use_mirror_u", text="U")
col.prop(md, "use_mirror_v", text="V")
col = layout.column(align=True)
if md.use_mirror_u:
col.prop(md, "mirror_offset_u")
if md.use_mirror_v:
col.prop(md, "mirror_offset_v")
col = layout.column()
if md.use_mirror_merge is True:

1
source/blender/makesdna/DNA_modifier_types.h
View File

@ -277,6 +277,7 @@ typedef struct MirrorModifierData {
short axis DNA_DEPRECATED; /* deprecated, use flag instead */
short flag;
float tolerance;
float uv_offset[2];
struct Object *mirror_ob;
} MirrorModifierData;

14
source/blender/makesrna/intern/rna_modifier.c
View File

@ -1526,6 +1526,20 @@ static void rna_def_modifier_mirror(BlenderRNA *brna)
RNA_def_property_ui_text(prop, "Mirror V", "Mirror the V texture coordinate around the 0.5 point");
RNA_def_property_update(prop, 0, "rna_Modifier_update");
prop = RNA_def_property(srna, "mirror_offset_u", PROP_FLOAT, PROP_FACTOR);
RNA_def_property_float_sdna(prop, NULL, "uv_offset[0]");
RNA_def_property_range(prop, -1, 1);
RNA_def_property_ui_range(prop, -1, 1, 2, 4);
RNA_def_property_ui_text(prop, "U Offset", "Amount to offset mirrored UVs from the 0.5 point on the U axis");
RNA_def_property_update(prop, 0, "rna_Modifier_update");
prop = RNA_def_property(srna, "mirror_offset_v", PROP_FLOAT, PROP_FACTOR);
RNA_def_property_float_sdna(prop, NULL, "uv_offset[1]");
RNA_def_property_range(prop, -1, 1);
RNA_def_property_ui_range(prop, -1, 1, 2, 4);
RNA_def_property_ui_text(prop, "V Offset", "Amount to offset mirrored UVs from the 0.5 point on the V axis");
RNA_def_property_update(prop, 0, "rna_Modifier_update");
prop = RNA_def_property(srna, "merge_threshold", PROP_FLOAT, PROP_DISTANCE);
RNA_def_property_float_sdna(prop, NULL, "tolerance");
RNA_def_property_range(prop, 0, FLT_MAX);

4
source/blender/modifiers/intern/MOD_mirror.c
View File

@ -274,8 +274,8 @@ static DerivedMesh *doMirrorOnAxis(MirrorModifierData *mmd,
int j = maxLoops;
dmloopuv += j; /* second set of loops only */
for (; j-- > 0; dmloopuv++) {
if (do_mirr_u) dmloopuv->uv[0] = 1.0f - dmloopuv->uv[0];
if (do_mirr_v) dmloopuv->uv[1] = 1.0f - dmloopuv->uv[1];
if (do_mirr_u) dmloopuv->uv[0] = 1.0f - dmloopuv->uv[0] + mmd->uv_offset[0];
if (do_mirr_v) dmloopuv->uv[1] = 1.0f - dmloopuv->uv[1] + mmd->uv_offset[1];
}
}
}