From bf455de35dbffc176e1bad9f53a0aeded2b366ba Mon Sep 17 00:00:00 2001
From: kichikuou <KichikuouChrome@gmail.com>
Date: Wed, 1 Apr 2026 15:28:00 +0900
Subject: [PATCH] SealEngine: Implement MagSpeed functions

mag_speed is a per-plugin integer (default 1) set by SetMagSpeed on
all existing plugins. use_mag_speed is a per-instance flag (default
true) set by SetInstanceUseMagSpeed. When use_mag_speed is true,
motion delta_frame is multiplied by mag_speed.
---
 include/reign.h       |  4 ++++
 src/3d/reign.c        |  4 ++++
 src/hll/ReignEngine.c | 26 ++++++++++++++++++++++----
 3 files changed, 30 insertions(+), 4 deletions(-)

diff --git a/include/reign.h b/include/reign.h
index 853d8a5..6a101f7 100644
--- a/include/reign.h
+++ b/include/reign.h
@@ -149,6 +149,9 @@ struct RE_plugin {
 
 	// TapirEngine
 	bool suspended;
+
+	// SealEngine
+	int mag_speed;
 };
 
 struct RE_instance {
@@ -171,6 +174,7 @@ struct RE_instance {
 	float shadow_volume_bone_radius;
 	bool draw_bump;
 	float fps;
+	bool use_mag_speed;
 	bool motion_blend;
 	float motion_blend_rate;
 	vec3 ambient;
diff --git a/src/3d/reign.c b/src/3d/reign.c
index 7b36dfc..51529d0 100644
--- a/src/3d/reign.c
+++ b/src/3d/reign.c
@@ -49,6 +49,7 @@ static struct RE_instance *create_instance(struct RE_plugin *plugin)
 	instance->shadow_volume_bone_radius = 0.1f;
 	instance->draw_bump = true;
 	instance->fps = 30.0f;
+	instance->use_mag_speed = true;
 	instance->column_height = 1.0f;
 	instance->column_radius = 1.0f;
 	glm_mat4_identity(instance->local_transform);
@@ -240,6 +241,7 @@ struct RE_plugin *RE_plugin_new(enum RE_plugin_version version)
 	plugin->pae_cache = ht_create(32);
 	for (int i = 0; i < RE_NR_BACK_CGS; i++)
 		RE_back_cg_init(&plugin->back_cg[i]);
+	plugin->mag_speed = 1;
 	plugin->fog_type = RE_FOG_NONE;
 	plugin->fog_near = 1.0;
 	plugin->fog_far = 10.0;
@@ -326,6 +328,8 @@ bool RE_build_model(struct RE_plugin *plugin, int elapsed_ms)
 			continue;
 
 		float delta_frame = inst->fps * elapsed_ms / 1000.0;
+		if (inst->use_mag_speed)
+			delta_frame *= plugin->mag_speed;
 		update_motion(inst->motion, delta_frame);
 		update_motion(inst->next_motion, delta_frame);
 
diff --git a/src/hll/ReignEngine.c b/src/hll/ReignEngine.c
index 20e5acb..83bc999 100644
--- a/src/hll/ReignEngine.c
+++ b/src/hll/ReignEngine.c
@@ -2334,7 +2334,13 @@ HLL_LIBRARY(ReignEngine, REIGN_EXPORTS,
 
 HLL_LIBRARY(TapirEngine, REIGN_EXPORTS, TAPIR_EXPORTS);
 
-HLL_QUIET_UNIMPLEMENTED(, void, SealEngine, SetMagSpeed, int MagSpeed);
+static void SealEngine_SetMagSpeed(int mag_speed)
+{
+	for (int i = 0; i < RE_MAX_PLUGINS; i++) {
+		if (plugins[i])
+			plugins[i]->mag_speed = mag_speed;
+	}
+}
 //bool SealEngine_SaveInstance(int PluginNumber, int InstanceNumber, struct string *FileName);
 
 static bool SealEngine_IsExistInstanceData(int plugin, int instance, struct string *filename)
@@ -2437,8 +2443,20 @@ HLL_WARN_UNIMPLEMENTED(false, bool, SealEngine, SetInstanceCircleShadowRadius, i
 //float SealEngine_GetInstanceCircleShadowRadius(int PluginNumber, int InstanceNumber);
 //bool SealEngine_LoadInstanceLightParam(int PluginNumber, int InstanceNumber);
 HLL_WARN_UNIMPLEMENTED(false, bool, SealEngine, StoreInstanceLightParam, int PluginNumber, int InstanceNumber);
-HLL_WARN_UNIMPLEMENTED(false, bool, SealEngine, SetInstanceUseMagSpeed, int PluginNumber, int InstanceNumber, bool UseMagSpeed);
-//bool SealEngine_IsInstanceUseMagSpeed(int PluginNumber, int InstanceNumber);
+static bool SealEngine_SetInstanceUseMagSpeed(int plugin, int instance, bool use_mag_speed)
+{
+	struct RE_instance *ri = get_instance(plugin, instance);
+	if (!ri)
+		return false;
+	ri->use_mag_speed = use_mag_speed;
+	return true;
+}
+
+static bool SealEngine_IsInstanceUseMagSpeed(int plugin, int instance)
+{
+	struct RE_instance *ri = get_instance(plugin, instance);
+	return ri ? ri->use_mag_speed : false;
+}
 //bool SealEngine_CreateInstanceDebugBoneList(int PluginNumber, int InstanceNumber, int BoneInstanceNumber, int OnCursorIndex, int SelectedIndex);
 //bool SealEngine_CreateInstanceDebugBoneCollision(int PluginNumber, int InstanceNumber, int BoneInstanceNumber, int OnCursorIndex, int SelectedIndex);
 //bool SealEngine_GetCameraPos(int PluginNumber, float *X, float *Y, float *Z);
@@ -2559,7 +2577,7 @@ HLL_QUIET_UNIMPLEMENTED(false, bool, SealEngine, IsThreadLoadingMode, int Plugin
 	    HLL_TODO_EXPORT(LoadInstanceLightParam, SealEngine_LoadInstanceLightParam), \
 	    HLL_EXPORT(StoreInstanceLightParam, SealEngine_StoreInstanceLightParam), \
 	    HLL_EXPORT(SetInstanceUseMagSpeed, SealEngine_SetInstanceUseMagSpeed), \
-	    HLL_TODO_EXPORT(IsInstanceUseMagSpeed, SealEngine_IsInstanceUseMagSpeed), \
+	    HLL_EXPORT(IsInstanceUseMagSpeed, SealEngine_IsInstanceUseMagSpeed), \
 	    HLL_TODO_EXPORT(CreateInstanceDebugBoneList, SealEngine_CreateInstanceDebugBoneList), \
 	    HLL_TODO_EXPORT(CreateInstanceDebugBoneCollision, SealEngine_CreateInstanceDebugBoneCollision), \
 	    HLL_TODO_EXPORT(GetCameraPos, SealEngine_GetCameraPos), \