Press n or j to go to the next uncovered block, b, p or k for the previous block.
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* ☷ Gon (Earth) Stance-Specific Animations
*
* Specialized idle, movement, and guard animations for the Gon (곤/Earth) trigram.
* Embodies grounding power and takedown mastery from Ssireum wrestling techniques.
*
* **Korean Martial Arts Context:**
* - **무술**: 씨름 던지기 기술 (Ssireum Throwing Techniques)
* - **특성**: 던지기와 넘어뜨리기 (Throws and Takedowns), 지면 제어 (Ground Control)
* - **철학**: 땅의 포용력 (Earth's Embracing Power), 대지의 안정성 (Ground Stability)
* - **대표 기술**: 대지포옹 (Earth Embrace/Grounding Takedown)
*
* @module systems/animation/catalogs/GonStanceAnimations
* @category Animation
* @korean 곤괘자세애니메이션
*/
import { BoneName, type SkeletalAnimation } from "@/types/skeletal";
import { MartialArtsAnimationBuilder } from "../builders/MartialArtsAnimationBuilder";
/**
* Anatomical safety constants for Gon (Earth) trigram animations
*
* These limits ensure joint rotations remain within safe physiological ranges
* while maintaining powerful, grounded animation for Gon's throwing techniques.
*/
export const ANATOMICAL_LIMITS_GON_STANCE = {
/**
* Maximum safe knee bend for deep stances: 130° (2.27 radians)
*
* Deep knee bends for Ssireum stance require 110-130° flexion.
* This maintains low center of gravity while preventing joint strain.
*/
MAX_KNEE_BEND: 2.27, // 130° in radians
/**
* Maximum safe hip flexion for throws: 110° (1.92 radians)
*
* Hip flexion for lifting and throwing motions. Safe range for
* power generation without risking lower back strain.
*/
MAX_HIP_FLEXION: 1.92, // 110° in radians
/**
* Maximum safe ankle dorsiflexion: 20° (0.35 radians)
*
* Ankle flexibility for maintaining balance during throws and sweeps.
* Conservative limit for stable weight transfer.
*/
MAX_ANKLE_DORSIFLEX: 0.35, // 20° in radians
} as const;
// ═══════════════════════════════════════════════════════════════════════════
// ☷ GON IDLE GROUNDED ANIMATION (곤괘 대지 자세)
// ═══════════════════════════════════════════════════════════════════════════
/**
* Gon Idle Ssireum Stance Animation
*
* **Korean**: 곤괘 씨름 자세 (Gon-gwae Ssireum Jase)
* **Philosophy**: Earth's grounding power through low center of gravity
*
* Specialized Ssireum wrestling idle stance that differs from the general
* Gon idle animation (`stance_gon` in StanceIdleAnimations.ts). This animation
* emphasizes deeper grounding, lower center of gravity, and wrestling-specific
* hand positioning for grappling readiness.
*
* **When to use**:
* - Use `GON_IDLE_SSIREUM_STANCE` for active combat scenarios requiring
* wrestling/grappling readiness with very low center of gravity
* - Use `stance_gon` idle for general Gon stance with standard posture
*
* Characteristics:
* - Very low center of gravity with wide stance
* - Hands positioned low for grappling readiness
* - Hips back, knees deeply bent
* - Weight feels heavy and earthbound
* - Breathing emphasizes settling deeper
*
* Animation Cycle:
* - 0ms: Low grounded neutral position
* - 1700ms: Deep breath settling (sink deeper)
* - 3400ms: Return to neutral (complete cycle)
*
* @korean 곤괘씨름자세
* @duration 3400ms (3.4 second cycle)
* @category Idle Animation
*/
export const GON_IDLE_SSIREUM_STANCE: SkeletalAnimation =
MartialArtsAnimationBuilder.create(
"gon_idle_ssireum_stance",
"곤괘 씨름 자세"
)
.asIdle(3.4, true)
// Keyframe 0ms: Low grounded neutral
.at(0)
.rotate(BoneName.PELVIS, -0.35, 0, 0) // -20° (hips back and low)
.rotate(BoneName.SPINE_LOWER, 0, 0, 0) // Neutral lower spine
.rotate(BoneName.SPINE_UPPER, 0.26, 0, 0) // 15° (torso forward for balance)
.rotate(BoneName.HIP_L, 0, 0, 0) // Hips neutral
.rotate(BoneName.HIP_R, 0, 0, 0)
.rotate(BoneName.KNEE_L, -0.87, 0, 0) // -50° (deep knee bend)
.rotate(BoneName.KNEE_R, -0.87, 0, 0) // -50° (deep knee bend)
.rotate(BoneName.FOOT_L, 0.35, 0, 0) // 20° (weight on full foot)
.rotate(BoneName.FOOT_R, 0.35, 0, 0) // 20° (weight on full foot)
.rotate(BoneName.SHOULDER_L, 0.52, 0.26, -0.35) // 30°, 15°, -20° (hands low)
.rotate(BoneName.SHOULDER_R, 0.52, -0.26, 0.35) // 30°, -15°, 20°
.rotate(BoneName.ELBOW_L, 0, 0, -1.4) // -80° (arms bent ready to grab)
.rotate(BoneName.ELBOW_R, 0, 0, 1.4) // 80°
.rotate(BoneName.HEAD, 0, 0, 0) // Head neutral, aware
.position(BoneName.PELVIS, 0, -0.1, 0) // Lowered pelvis position
.done<MartialArtsAnimationBuilder>()
// Keyframe 1700ms: Deep breath settling (sink deeper)
.at(1.7)
.rotate(BoneName.PELVIS, -0.38, 0, 0) // -22° (settle deeper)
.rotate(BoneName.SPINE_UPPER, 0.28, 0, 0) // 16° (lean forward slightly more)
.rotate(BoneName.KNEE_L, -0.91, 0, 0) // -52° (sink lower)
.rotate(BoneName.KNEE_R, -0.91, 0, 0) // -52°
.rotate(BoneName.SHOULDER_L, 0.56, 0.30, -0.38) // 32°, 17°, -22° (hands settle)
.rotate(BoneName.SHOULDER_R, 0.56, -0.30, 0.38) // 32°, -17°, 22°
.position(BoneName.PELVIS, 0, -0.12, 0) // Lower pelvis slightly
.done<MartialArtsAnimationBuilder>()
// Keyframe 3400ms: Return to start
.at(3.4)
.rotate(BoneName.PELVIS, -0.35, 0, 0) // -20°
.rotate(BoneName.SPINE_UPPER, 0.26, 0, 0) // 15°
.rotate(BoneName.KNEE_L, -0.87, 0, 0) // -50°
.rotate(BoneName.KNEE_R, -0.87, 0, 0) // -50°
.rotate(BoneName.SHOULDER_L, 0.52, 0.26, -0.35) // Return to start
.rotate(BoneName.SHOULDER_R, 0.52, -0.26, 0.35)
.position(BoneName.PELVIS, 0, -0.1, 0)
.done<MartialArtsAnimationBuilder>()
.build();
// ═══════════════════════════════════════════════════════════════════════════
// ☷ GON HEAVY GROUNDING STEP (곤괘 땅 밟기)
// ═══════════════════════════════════════════════════════════════════════════
/**
* Gon Heavy Grounding Step Animation
*
* **Korean**: 땅 밟기 (Ttang Bapgi)
* **Philosophy**: Each step plants firmly with earthbound power
*
* Characteristics:
* - Forward movement with heavy grounded feel
* - Each step plants firmly before lifting
* - Center of gravity stays low throughout
* - Arms ready for grappling engagement
*
* Animation Keyframes (4 keyframes spanning 267ms; ~16 interpolated frames when rendered at 60fps):
* - 0ms: Start position (low stance)
* - 90ms: Weight shift to left leg
* - 180ms: Right foot lifts and steps forward
* - 267ms: Right foot plants firmly
*
* @korean 땅밟기
* @duration 267ms
* @category Movement Animation
*/
export const GON_HEAVY_GROUNDING_STEP: SkeletalAnimation =
MartialArtsAnimationBuilder.create(
"gon_heavy_grounding_step",
"땅 밟기"
)
.asMovement(0.267, false)
// Keyframe 0ms: Start position (low stance)
.at(0)
.rotate(BoneName.PELVIS, -0.35, 0, 0) // -20° (hips back)
.rotate(BoneName.KNEE_L, -0.87, 0, 0) // -50° (deep bend)
.rotate(BoneName.KNEE_R, -0.87, 0, 0) // -50°
.rotate(BoneName.SHOULDER_L, 0.52, 0.26, -0.35) // Arms ready
.rotate(BoneName.SHOULDER_R, 0.52, -0.26, 0.35)
.rotate(BoneName.ELBOW_L, 0, 0, -1.4)
.rotate(BoneName.ELBOW_R, 0, 0, 1.4)
.position(BoneName.PELVIS, 0, -0.1, 0)
.done<MartialArtsAnimationBuilder>()
// Keyframe 90ms: Weight shift to left leg
.at(0.09)
.rotate(BoneName.PELVIS, -0.35, -0.09, 0) // Slight rotation to left
.rotate(BoneName.KNEE_L, -1.05, 0, 0) // -60° (left leg bends more)
.rotate(BoneName.KNEE_R, -0.7, 0, 0) // -40° (right prepares to lift)
.position(BoneName.PELVIS, -0.02, -0.1, 0) // Shift weight left
.done<MartialArtsAnimationBuilder>()
// Keyframe 180ms: Right foot lifts and steps forward
.at(0.18)
.rotate(BoneName.HIP_R, 0.35, 0, 0) // 20° (lift leg)
.rotate(BoneName.KNEE_R, -0.52, 0, 0) // -30° (knee up)
.rotate(BoneName.FOOT_R, 0, 0, 0) // Foot neutral for step
.rotate(BoneName.KNEE_L, -0.96, 0, 0) // -55° (support leg)
.rotate(BoneName.SPINE_UPPER, 0.17, 0, 0) // 10° (lean forward into step)
.position(BoneName.PELVIS, -0.02, -0.08, 0.1) // Move forward
.done<MartialArtsAnimationBuilder>()
// Keyframe 267ms: Right foot plants firmly
.at(0.267)
.rotate(BoneName.PELVIS, -0.35, 0, 0) // Return to neutral
.rotate(BoneName.HIP_R, 0, 0, 0) // Leg down
.rotate(BoneName.KNEE_R, -0.87, 0, 0) // -50° (plant firmly)
.rotate(BoneName.KNEE_L, -0.87, 0, 0) // -50° (equalize)
.rotate(BoneName.FOOT_R, 0.35, 0, 0) // 20° (full weight on foot)
.rotate(BoneName.SPINE_UPPER, 0.26, 0, 0) // 15° (return to forward lean)
.position(BoneName.PELVIS, 0, -0.1, 0.2) // Forward position
.done<MartialArtsAnimationBuilder>()
.build();
// ═══════════════════════════════════════════════════════════════════════════
// ☷ GON SWEEP POSITIONING STEP (곤괘 쓸기 준비)
// ═══════════════════════════════════════════════════════════════════════════
/**
* Gon Sweep Positioning Step Animation
*
* **Korean**: 쓸기 준비 (Sseulgi Junbi)
* **Philosophy**: Lateral movement setting up sweep techniques
*
* Characteristics:
* - Lateral movement to side
* - Lead leg positioned for foot sweep
* - Hands reaching for grappling control
* - Weight shifts for throw setup
*
* Animation Keyframes (4 keyframes spanning 300ms; ~18 interpolated frames when rendered at 60fps):
* - 0ms: Start position (low stance)
* - 100ms: Weight shift to right leg
* - 200ms: Left foot slides laterally
* - 300ms: Positioned for sweep
*
* @korean 쓸기준비
* @duration 300ms
* @category Movement Animation
*/
export const GON_SWEEP_POSITIONING_STEP: SkeletalAnimation =
MartialArtsAnimationBuilder.create(
"gon_sweep_positioning_step",
"쓸기 준비"
)
.asMovement(0.3, false)
// Keyframe 0ms: Start position (low stance)
.at(0)
.rotate(BoneName.PELVIS, -0.35, 0, 0) // -20°
.rotate(BoneName.KNEE_L, -0.87, 0, 0) // -50°
.rotate(BoneName.KNEE_R, -0.87, 0, 0) // -50°
.rotate(BoneName.SHOULDER_L, 0.52, 0.26, -0.35)
.rotate(BoneName.SHOULDER_R, 0.52, -0.26, 0.35)
.rotate(BoneName.ELBOW_L, 0, 0, -1.4)
.rotate(BoneName.ELBOW_R, 0, 0, 1.4)
.position(BoneName.PELVIS, 0, -0.1, 0)
.done<MartialArtsAnimationBuilder>()
// Keyframe 100ms: Weight shift to right leg
.at(0.1)
.rotate(BoneName.PELVIS, -0.35, 0.09, 0) // Rotate right for shift
.rotate(BoneName.KNEE_R, -1.05, 0, 0) // -60° (right leg loads)
.rotate(BoneName.KNEE_L, -0.7, 0, 0) // -40° (left prepares to move)
.rotate(BoneName.SPINE_UPPER, 0.26, 0.09, 0) // Slight rotation
.position(BoneName.PELVIS, 0.02, -0.1, 0) // Shift weight right
.done<MartialArtsAnimationBuilder>()
// Keyframe 200ms: Left foot slides laterally
.at(0.2)
.rotate(BoneName.HIP_L, 0, 0, -0.17) // -10° (abduct slightly)
.rotate(BoneName.KNEE_L, -0.52, 0, 0) // -30° (slide with bent knee)
.rotate(BoneName.FOOT_L, 0, 0, 0) // Neutral for slide
.rotate(BoneName.SHOULDER_L, 0.70, 0.44, -0.26) // 40°, 25°, -15° (reach)
.rotate(BoneName.SHOULDER_R, 0.70, -0.44, 0.26) // Reach forward for grab
.position(BoneName.PELVIS, 0.02, -0.08, -0.15) // Move left
.done<MartialArtsAnimationBuilder>()
// Keyframe 300ms: Positioned for sweep
.at(0.3)
.rotate(BoneName.PELVIS, -0.35, 0, 0) // Return to neutral rotation
.rotate(BoneName.HIP_L, 0, 0, -0.09) // -5° (slight abduction maintained)
.rotate(BoneName.KNEE_L, -0.87, 0, 0) // -50° (plant firmly)
.rotate(BoneName.KNEE_R, -0.87, 0, 0) // -50° (equalize)
.rotate(BoneName.FOOT_L, 0.35, 0, 0) // 20° (ready for sweep)
.rotate(BoneName.SHOULDER_L, 0.70, 0.44, -0.26) // Arms extended for grab
.rotate(BoneName.SHOULDER_R, 0.70, -0.44, 0.26)
.rotate(BoneName.SPINE_UPPER, 0.26, 0, 0) // Forward lean maintained
.position(BoneName.PELVIS, 0, -0.1, -0.2) // Lateral position
.done<MartialArtsAnimationBuilder>()
.build();
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