From a706a41dcb9bbcf82e3097103090c259829331e5 Mon Sep 17 00:00:00 2001
From: BromBrom-Hani <190221485+brombrom-hani@users.noreply.github.com>
Date: Sun, 31 May 2026 12:22:36 +0200
Subject: [PATCH 1/2] parts: impl sprite_deform for SetPartsCG

---
 src/parts/parts.c  |  6 ++++--
 src/parts/render.c | 20 +++++++++++++++++++-
 2 files changed, 23 insertions(+), 3 deletions(-)

diff --git a/src/parts/parts.c b/src/parts/parts.c
index 5b8dd9a..22a35f6 100644
--- a/src/parts/parts.c
+++ b/src/parts/parts.c
@@ -1188,12 +1188,13 @@ int PE_GetDelegateIndex(int parts_no)
 	return parts ? parts->delegate_index : -1;
 }
 
-bool PE_SetPartsCG(int parts_no, struct string *cg_name, possibly_unused int sprite_deform, int state)
+bool PE_SetPartsCG(int parts_no, struct string *cg_name, int sprite_deform, int state)
 {
 	if (!parts_state_valid(--state))
 		return false;
 
 	struct parts *parts = parts_get(parts_no);
+	parts->sprite_deform = sprite_deform;
 	if (!cg_name || *(cg_name->text) == '\0') {
 		parts_state_reset(&parts->states[state], PARTS_CG);
 		parts_dirty(parts);
@@ -1204,12 +1205,13 @@ bool PE_SetPartsCG(int parts_no, struct string *cg_name, possibly_unused int spr
 	return parts_cg_set(parts, cg, cg_name);
 }
 
-bool PE_SetPartsCG_by_index(int parts_no, int cg_no, possibly_unused int sprite_deform, int state)
+bool PE_SetPartsCG_by_index(int parts_no, int cg_no, int sprite_deform, int state)
 {
 	if (!parts_state_valid(--state))
 		return false;
 
 	struct parts *parts = parts_get(parts_no);
+	parts->sprite_deform = sprite_deform;
 	if (!cg_no) {
 		parts_state_reset(&parts->states[state], PARTS_CG);
 		parts_dirty(parts);
diff --git a/src/parts/render.c b/src/parts/render.c
index 661fd7c..82866e7 100644
--- a/src/parts/render.c
+++ b/src/parts/render.c
@@ -153,7 +153,25 @@ static void parts_render_cg(struct parts *parts, struct parts_common *common)
 	glm_rotate_z(mw_transform, glm_rad(parts->local.rotation.z), mw_transform);
 	glm_scale(mw_transform, (vec3){ parts->global.scale.x, parts->global.scale.y, 1.0 });
 	glm_translate(mw_transform, (vec3){ common->origin_offset.x, common->origin_offset.y, 0 });
-	glm_scale(mw_transform, (vec3){ common->w, common->h, 1.0 });
+
+	switch (parts->sprite_deform) {
+	// Flip horizontally
+	case 1:
+		glm_translate(mw_transform, (vec3){ common->w, 0.0f, 0.0f });
+		glm_scale(mw_transform, (vec3){ -common->w, common->h, 1.0f });
+		break;
+	// Flip vertically
+	case 2:
+		glm_translate(mw_transform, (vec3){ 0.0f, common->h, 0.0f });
+		glm_scale(mw_transform, (vec3){ common->w, -common->h, 1.0f });
+		break;
+	default:
+		WARNING("Invalid sprite_deform: %d", parts->sprite_deform);
+	// No deform
+	case 0:
+		glm_scale(mw_transform, (vec3){ common->w, common->h, 1.0 });
+		break;
+	}
 
 	Rectangle r = common->surface_area;
 	if (!r.w && !r.h) {

From 12735d5c8c3d3aaf814b7c962d532f585ce9357e Mon Sep 17 00:00:00 2001
From: BromBrom-Hani <190221485+brombrom-hani@users.noreply.github.com>
Date: Mon, 1 Jun 2026 08:32:36 +0200
Subject: [PATCH 2/2] parts: sprite_deform for SetPartsCG string index

Keeps the PE_SetPartsCG_by_string_index consistent with the rest of the SetPartsCG variants
---
 src/parts/parts.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/parts/parts.c b/src/parts/parts.c
index 22a35f6..fd8ec8f 100644
--- a/src/parts/parts.c
+++ b/src/parts/parts.c
@@ -1224,12 +1224,13 @@ bool PE_SetPartsCG_by_index(int parts_no, int cg_no, int sprite_deform, int stat
 
 // XXX: Rance Quest
 bool PE_SetPartsCG_by_string_index(int parts_no, struct string *cg_name,
-		possibly_unused int sprite_deform, int state)
+		int sprite_deform, int state)
 {
 	if (!parts_state_valid(--state))
 		return false;
 
 	struct parts *parts = parts_get(parts_no);
+	parts->sprite_deform = sprite_deform;
 	if (!cg_name) {
 		parts_state_reset(&parts->states[state], PARTS_CG);
 		parts_dirty(parts);