Press n or j to go to the next uncovered block, b, p or k for the previous block.
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* ☶ Gan (Mountain) Stance-Specific Animations
*
* Specialized idle, movement, and guard animations for the Gan (간/Mountain) trigram.
* Embodies immovable defense and patient counter from Hapkido defensive techniques.
*
* **Korean Martial Arts Context:**
* - **무술**: 합기도 방어 기술 (Hapkido Defensive Blocks)
* - **특성**: 부동의 방어 (Immovable Defense), 반격 기술 (Counter Techniques)
* - **철학**: 산의 불변성 (Mountain's Immutability), 바위의 견고함 (Rock's Solidity)
* - **대표 기술**: 반석방어 (Rock Defense/Immovable Counter)
*
* @module systems/animation/catalogs/GanStanceAnimations
* @category Animation
* @korean 간괘자세애니메이션
*/
import { BoneName, type SkeletalAnimation } from "@/types/skeletal";
import { MartialArtsAnimationBuilder } from "../builders/MartialArtsAnimationBuilder";
/**
* Anatomical safety constants for Gan (Mountain) trigram animations
*
* These limits document safe physiological ranges for Korean martial arts movements.
* The constants serve as reference documentation validated by Korean martial arts experts
* and inform the design of all Gan animations to ensure realistic, safe joint mechanics.
*
* Note: These are documentation constants. The actual animation rotations are designed
* to stay well within these limits naturally through authentic Hapkido defensive biomechanics.
*/
export const ANATOMICAL_LIMITS_GAN_STANCE = {
/**
* Maximum safe knee bend for deep rooted stance: 25° (0.44 radians)
*
* Gan stance requires deep, stable leg positioning. Knees bent to ~15-25°
* provide optimal balance between stability and mobility for defensive counters.
*/
MAX_KNEE_BEND_ROOTED: 0.44, // 25° in radians
/**
* Maximum safe elbow bend for solid guard: 120° (2.09 radians)
*
* High solid guard requires elbows bent to create reinforced blocking structure.
* 110-120° provides maximum structural integrity for absorbing attacks.
*/
MAX_ELBOW_BEND_GUARD: 2.09, // 120° in radians
/**
* Maximum safe shoulder elevation for high guard: -35° (-0.61 radians)
*
* High guard positioning with shoulders elevated to protect head and face.
* -30° to -35° elevation creates solid defensive wall without strain.
*/
MAX_SHOULDER_ELEVATION: -0.61, // -35° in radians
} as const;
// ═══════════════════════════════════════════════════════════════════════════
// ☶ GAN IDLE ROOTED ANIMATION (간괘 뿌리 자세)
// ═══════════════════════════════════════════════════════════════════════════
/**
* Gan Idle Rooted Animation
*
* **Korean**: 간괘 뿌리 자세 (Gan-gwae Ppuri Jase)
* **Philosophy**: Mountain's immovability through rooted stillness
*
* Characteristics:
* - Minimal movement emphasizing stability (산의 고요)
* - Deep breathing without upper body motion
* - Weight grounded through entire stance
* - High solid guard position maintained
*
* Animation Cycle:
* - 0ms: Rooted neutral position
* - 1600ms: Deep breath (minimal chest expansion)
* - 3200ms: Return to start (complete cycle)
*
* @korean 간괘뿌리자세
* @duration 3200ms (3.2 second cycle)
* @category Idle Animation
*/
export const GAN_IDLE_ROOTED: SkeletalAnimation =
MartialArtsAnimationBuilder.create(
"gan_idle_rooted",
"간괘 뿌리 자세"
)
.asIdle(3.2, true)
// Keyframe 0ms: Rooted neutral position (baseline)
.at(0)
.rotate(BoneName.PELVIS, 0, 0, 0) // Neutral pelvis - immovable
.rotate(BoneName.SPINE_UPPER, 0, 0, 0) // Neutral spine - solid
.rotate(BoneName.SPINE_LOWER, 0, 0, 0) // Lower spine stable
.rotate(BoneName.KNEE_L, -0.26, 0, 0) // -15° bent for stability
.rotate(BoneName.KNEE_R, -0.26, 0, 0) // -15° bent for stability
.rotate(BoneName.SHOULDER_L, -0.35, 0, -0.44) // -20°, 0°, -25° (high guard)
.rotate(BoneName.SHOULDER_R, -0.35, 0, 0.44) // -20°, 0°, 25° (high guard)
.rotate(BoneName.ELBOW_L, 0, 0, -1.92) // -110° (reinforced structure)
.rotate(BoneName.ELBOW_R, 0, 0, 1.92) // 110° (reinforced structure)
.rotate(BoneName.WRIST_L, 0, 0, 0) // Neutral wrists
.rotate(BoneName.WRIST_R, 0, 0, 0)
.rotate(BoneName.HEAD, 0, 0, 0) // Head steady, focused
.position(BoneName.PELVIS, 0, 0, 0)
.done<MartialArtsAnimationBuilder>()
// Keyframe 1600ms: Deep breath (minimal movement - mountain stillness)
.at(1.6)
.rotate(BoneName.SPINE_UPPER, -0.017, 0, 0) // -1° (tiny chest expansion)
.rotate(BoneName.SPINE_LOWER, 0, 0, 0) // Lower spine remains stable
.rotate(BoneName.SHOULDER_L, -0.366, 0, -0.453) // -21°, 0°, -26° (slight shoulder adjustment)
.rotate(BoneName.SHOULDER_R, -0.366, 0, 0.453) // -21°, 0°, 26°
.rotate(BoneName.ELBOW_L, 0, 0, -1.92) // -110° (maintained guard structure)
.rotate(BoneName.ELBOW_R, 0, 0, 1.92) // 110° (maintained guard structure)
.rotate(BoneName.WRIST_L, 0, 0, 0) // Wrists remain neutral
.rotate(BoneName.WRIST_R, 0, 0, 0)
.rotate(BoneName.KNEE_L, -0.279, 0, 0) // -16° (slightly deeper root)
.rotate(BoneName.KNEE_R, -0.279, 0, 0) // -16°
.rotate(BoneName.HEAD, 0, 0, 0) // Head steady - mountain focus
.position(BoneName.PELVIS, 0, 0, 0) // No movement - mountain doesn't shift
.done<MartialArtsAnimationBuilder>()
// Keyframe 3200ms: Return to start (complete cycle)
.at(3.2)
.rotate(BoneName.SPINE_UPPER, 0, 0, 0)
.rotate(BoneName.SPINE_LOWER, 0, 0, 0) // Stable lower spine
.rotate(BoneName.SHOULDER_L, -0.35, 0, -0.44)
.rotate(BoneName.SHOULDER_R, -0.35, 0, 0.44)
.rotate(BoneName.ELBOW_L, 0, 0, -1.92) // -110° (guard restored)
.rotate(BoneName.ELBOW_R, 0, 0, 1.92) // 110° (guard restored)
.rotate(BoneName.WRIST_L, 0, 0, 0) // Neutral wrists
.rotate(BoneName.WRIST_R, 0, 0, 0)
.rotate(BoneName.KNEE_L, -0.26, 0, 0)
.rotate(BoneName.KNEE_R, -0.26, 0, 0)
.rotate(BoneName.HEAD, 0, 0, 0)
.position(BoneName.PELVIS, 0, 0, 0)
.done<MartialArtsAnimationBuilder>()
.build();
// ═══════════════════════════════════════════════════════════════════════════
// ☶ GAN SHORT ROOT STEP (산의 걸음)
// ═══════════════════════════════════════════════════════════════════════════
/**
* Gan Short Root Step Animation
*
* **Korean**: 산의 걸음 (San-ui Georeum) - Mountain's Walk
* **Technique**: Minimal forward movement maintaining root
*
* Characteristics:
* - Each step reinforces stability (no excess motion)
* - Weight stays low and grounded
* - Guard remains solid throughout
* - No compromise to balance
*
* Animation Phases:
* - 0-133ms: Weight shift preparation (frames 0-2)
* - 133-267ms: Minimal forward step (frames 3-5)
* - 267-400ms: Root reinforcement (frames 6-8)
*
* @korean 산의걸음
* @frames 9 frames (~44ms per frame at 60fps)
* @duration 400ms
* @category Movement Animation
*/
export const GAN_SHORT_ROOT_STEP: SkeletalAnimation =
MartialArtsAnimationBuilder.create(
"gan_short_root_step",
"산의 걸음"
)
.asMovement(0.4, false)
// Phase 1: Weight shift preparation (0ms, frame 0)
.at(0)
.rotate(BoneName.PELVIS, 0.087, 0, 0) // 5° forward tilt (minimal)
.rotate(BoneName.KNEE_R, -0.35, 0, 0) // -20° rear leg prepares
.rotate(BoneName.KNEE_L, -0.26, 0, 0) // -15° front leg ready
.rotate(BoneName.FOOT_L, 0, 0, 0) // Front foot flat
.rotate(BoneName.FOOT_R, 0.087, 0, 0) // 5° rear foot prepares to push
.rotate(BoneName.SHOULDER_L, -0.35, 0, -0.44) // Guard maintained
.rotate(BoneName.SHOULDER_R, -0.35, 0, 0.44)
.rotate(BoneName.ELBOW_L, 0, 0, -1.92)
.rotate(BoneName.ELBOW_R, 0, 0, 1.92)
.rotate(BoneName.HEAD, 0.052, 0, 0) // 3° head slightly forward (aware)
.position(BoneName.PELVIS, 0, 0, 0)
.done<MartialArtsAnimationBuilder>()
// Phase 2: Minimal forward step (200ms, frame 5)
.at(0.2)
.rotate(BoneName.PELVIS, 0.105, 0, 0) // 6° slight forward
.rotate(BoneName.KNEE_R, -0.26, 0, 0) // -15° extending
.rotate(BoneName.KNEE_L, -0.35, 0, 0) // -20° absorbing weight
.rotate(BoneName.FOOT_L, -0.052, 0, 0) // -3° foot plants
.rotate(BoneName.FOOT_R, 0.174, 0, 0) // 10° rear foot pushes off
.rotate(BoneName.SHOULDER_L, -0.35, 0, -0.44) // Guard solid
.rotate(BoneName.SHOULDER_R, -0.35, 0, 0.44)
.rotate(BoneName.ELBOW_L, 0, 0, -1.92) // -110° (maintained)
.rotate(BoneName.ELBOW_R, 0, 0, 1.92) // 110° (maintained)
.rotate(BoneName.HEAD, 0.052, 0, 0) // 3° head tracks forward
.position(BoneName.PELVIS, 0, 0, 0.15) // Minimal forward movement
.done<MartialArtsAnimationBuilder>()
// Phase 3: Root reinforcement (400ms, frame 9)
.at(0.4)
.rotate(BoneName.PELVIS, 0, 0, 0) // Return to neutral
.rotate(BoneName.KNEE_R, -0.26, 0, 0) // -15° rooted
.rotate(BoneName.KNEE_L, -0.26, 0, 0) // -15° rooted
.rotate(BoneName.FOOT_L, 0, 0, 0) // Front foot grounded
.rotate(BoneName.FOOT_R, 0, 0, 0) // Rear foot settled
.rotate(BoneName.SHOULDER_L, -0.35, 0, -0.44) // Guard maintained
.rotate(BoneName.SHOULDER_R, -0.35, 0, 0.44)
.rotate(BoneName.ELBOW_L, 0, 0, -1.92)
.rotate(BoneName.ELBOW_R, 0, 0, 1.92)
.rotate(BoneName.HEAD, 0, 0, 0) // Head returns to neutral focus
.position(BoneName.PELVIS, 0, 0, 0.25) // Short step complete
.done<MartialArtsAnimationBuilder>()
.build();
// ═══════════════════════════════════════════════════════════════════════════
// ☶ GAN DEFENSIVE ANGLE SHIFT (방어 각도 전환)
// ═══════════════════════════════════════════════════════════════════════════
/**
* Gan Defensive Angle Shift Animation
*
* **Korean**: 방어 각도 전환 (Bangeo Gakdo Jeonhwan) - Defensive Angle Transition
* **Technique**: Small angle change for better defensive position
*
* Characteristics:
* - Pivot on one foot maintaining stability
* - Guard remains solid throughout
* - No compromise to balance
* - Repositions for optimal counter angle
*
* Animation Phases:
* - 0-167ms: Begin pivot (frames 0-3)
* - 167-367ms: Angle rotation (frames 4-7)
* - 367-500ms: Settle and root (frames 8-10)
*
* @korean 방어각도전환
* @frames 11 frames (~45ms per frame at 60fps)
* @duration 500ms
* @category Movement Animation
*/
export const GAN_DEFENSIVE_ANGLE_SHIFT: SkeletalAnimation =
MartialArtsAnimationBuilder.create(
"gan_defensive_angle_shift",
"방어 각도 전환"
)
.asMovement(0.5, false)
// Phase 1: Begin pivot (0ms, frame 0)
.at(0)
.rotate(BoneName.PELVIS, 0, -0.174, 0) // 0°, -10° (begin rotation)
.rotate(BoneName.KNEE_L, -0.35, 0, 0) // -20° (pivot foot loads)
.rotate(BoneName.KNEE_R, -0.26, 0, 0) // -15° (support foot stable)
.rotate(BoneName.FOOT_L, 0, -0.087, 0) // 0°, -5° (beginning pivot)
.rotate(BoneName.FOOT_R, 0, 0, 0) // Support foot flat
.rotate(BoneName.SHOULDER_L, -0.35, 0, -0.44) // Guard maintained
.rotate(BoneName.SHOULDER_R, -0.35, 0, 0.44)
.rotate(BoneName.ELBOW_L, 0, 0, -1.92)
.rotate(BoneName.ELBOW_R, 0, 0, 1.92)
.rotate(BoneName.HEAD, 0, -0.087, 0) // 0°, -5° (head begins tracking)
.position(BoneName.PELVIS, 0, 0, 0)
.done<MartialArtsAnimationBuilder>()
// Phase 2: Angle rotation (267ms, frame 6)
.at(0.267)
.rotate(BoneName.PELVIS, 0, -0.349, 0) // 0°, -20° (maximum rotation)
.rotate(BoneName.SPINE_LOWER, 0, -0.262, 0) // 0°, -15° (torso follows)
.rotate(BoneName.SPINE_UPPER, 0, -0.174, 0) // 0°, -10° (upper body stable)
.rotate(BoneName.KNEE_L, -0.35, 0, 0) // -20° (pivot foot)
.rotate(BoneName.KNEE_R, -0.26, 0, 0) // -15° (support foot)
.rotate(BoneName.FOOT_L, 0, -0.262, 0) // 0°, -15° (pivot complete)
.rotate(BoneName.FOOT_R, 0, 0.052, 0) // 0°, 3° (support adjusts)
.rotate(BoneName.HEAD, 0, -0.174, 0) // 0°, -10° (eyes track forward)
.rotate(BoneName.SHOULDER_L, -0.35, 0, -0.44) // Guard maintained
.rotate(BoneName.SHOULDER_R, -0.35, 0, 0.44)
.rotate(BoneName.ELBOW_L, 0, 0, -1.92) // -110° (maintained)
.rotate(BoneName.ELBOW_R, 0, 0, 1.92) // 110° (maintained)
.position(BoneName.PELVIS, -0.05, 0, 0) // Minimal lateral shift
.done<MartialArtsAnimationBuilder>()
// Phase 3: Settle and root (500ms, frame 11)
.at(0.5)
.rotate(BoneName.PELVIS, 0, -0.349, 0) // 0°, -20° (settled angle)
.rotate(BoneName.SPINE_LOWER, 0, -0.262, 0) // 0°, -15°
.rotate(BoneName.SPINE_UPPER, 0, -0.174, 0) // 0°, -10°
.rotate(BoneName.KNEE_L, -0.26, 0, 0) // -15° (rooted)
.rotate(BoneName.KNEE_R, -0.26, 0, 0) // -15° (rooted)
.rotate(BoneName.FOOT_L, 0, -0.262, 0) // 0°, -15° (planted)
.rotate(BoneName.FOOT_R, 0, 0, 0) // Support foot flat and stable
.rotate(BoneName.HEAD, 0, -0.174, 0) // 0°, -10°
.rotate(BoneName.SHOULDER_L, -0.35, 0, -0.44) // Guard solid
.rotate(BoneName.SHOULDER_R, -0.35, 0, 0.44)
.rotate(BoneName.ELBOW_L, 0, 0, -1.92)
.rotate(BoneName.ELBOW_R, 0, 0, 1.92)
.position(BoneName.PELVIS, -0.08, 0, 0) // Final position
.done<MartialArtsAnimationBuilder>()
.build();
// ═══════════════════════════════════════════════════════════════════════════
// ☶ GAN HIGH SOLID GUARD TRANSITION (산 방어 전환)
// ═══════════════════════════════════════════════════════════════════════════
/**
* Gan High Solid Guard Transition Animation
*
* **Korean**: 산 방어 전환 (San Bangeo Jeonhwan) - Mountain Guard Transition
* **Technique**: Transition into Gan's characteristic high solid guard
*
* Characteristics:
* - High guard protecting head and upper body
* - Elbows reinforcing structure
* - Fists positioned for blocking
* - Stance wide and immovable
*
* Animation Phases:
* - 0-167ms: Begin guard transition
* - 167-333ms: Establish high solid guard
*
* @korean 산방어전환
* @duration 333ms
* @category Stance Animation
*/
export const GAN_HIGH_SOLID_GUARD_TRANSITION: SkeletalAnimation =
MartialArtsAnimationBuilder.create(
"gan_high_solid_guard_transition",
"산 방어 전환"
)
.asStance(0.333, false)
// Phase 1: Begin guard transition (0ms)
.at(0)
.rotate(BoneName.SHOULDER_L, -0.262, 0, -0.349) // -15°, 0°, -20° (raising)
.rotate(BoneName.SHOULDER_R, -0.262, 0, 0.349) // -15°, 0°, 20° (raising)
.rotate(BoneName.ELBOW_L, 0, 0, -1.57) // -90° (transitioning)
.rotate(BoneName.ELBOW_R, 0, 0, 1.57) // 90° (transitioning)
.rotate(BoneName.SPINE_UPPER, 0, 0, 0) // Neutral upper spine
.rotate(BoneName.SPINE_LOWER, 0, 0, 0) // Stable lower spine
.rotate(BoneName.PELVIS, 0, 0, 0) // Neutral pelvis
.rotate(BoneName.HEAD, 0.052, 0, 0) // 3° head lifts slightly
.position(BoneName.PELVIS, 0, 0, 0)
.done<MartialArtsAnimationBuilder>()
// Phase 2: Establish high solid guard (333ms)
.at(0.333)
.rotate(BoneName.SHOULDER_L, -0.35, 0, -0.44) // -20°, 0°, -25° (Gan high guard)
.rotate(BoneName.SHOULDER_R, -0.35, 0, 0.44) // -20°, 0°, 25° (Gan high guard)
.rotate(BoneName.ELBOW_L, 0, 0, -1.92) // -110° (reinforced structure)
.rotate(BoneName.ELBOW_R, 0, 0, 1.92) // 110° (reinforced structure)
.rotate(BoneName.WRIST_L, 0, 0, 0) // Neutral wrists for blocking
.rotate(BoneName.WRIST_R, 0, 0, 0)
.rotate(BoneName.SPINE_UPPER, -0.035, 0, 0) // -2° slight chest lift for solid structure
.rotate(BoneName.SPINE_LOWER, 0, 0, 0) // Lower spine stable
.rotate(BoneName.KNEE_L, -0.26, 0, 0) // -15° (stable stance)
.rotate(BoneName.KNEE_R, -0.26, 0, 0) // -15° (stable stance)
.rotate(BoneName.HEAD, 0, 0, 0) // Head neutral, focused
.position(BoneName.PELVIS, 0, 0, 0)
.done<MartialArtsAnimationBuilder>()
.build();
// ═══════════════════════════════════════════════════════════════════════════
// EXPORTS
// ═══════════════════════════════════════════════════════════════════════════
/**
* Map of all Gan stance-specific animations for easy access
* @korean 간괘자세애니메이션맵
*/
export const GAN_STANCE_ANIMATIONS: ReadonlyMap<string, SkeletalAnimation> = new Map([
// Idle & Movement
["gan_idle_rooted", GAN_IDLE_ROOTED],
["gan_short_root_step", GAN_SHORT_ROOT_STEP],
["gan_defensive_angle_shift", GAN_DEFENSIVE_ANGLE_SHIFT],
// Stance Transitions
["gan_high_solid_guard_transition", GAN_HIGH_SOLID_GUARD_TRANSITION],
]);
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