ModelRotation

Represents the rotation of a model in degrees

Overview

The ModelRotation class represents the rotation of a model in degrees, storing pitch (x) and yaw (y) values. It provides utility methods for conversion between degrees, radians, and Minecraft’s packed byte format.

Class Definition

public record ModelRotation(float x, float y)

Parameters:

• x - The pitch (x-rotation) in degrees
• y - The yaw (y-rotation) in degrees

Constants

EMPTY

public static final ModelRotation EMPTY

A rotation of (0, 0), representing no rotation.

INVALID

public static final ModelRotation INVALID

An invalid rotation value (Float.MAX_VALUE, Float.MAX_VALUE) used for initialization or error states.

Methods

pitch()

Returns a new rotation with only the pitch component.

public @NotNull ModelRotation pitch()

Returns: The pitch-only rotation (x, 0)

Example:

ModelRotation rotation = new ModelRotation(45.0f, 90.0f);
ModelRotation pitchOnly = rotation.pitch(); // (45.0, 0.0)

yaw()

Returns a new rotation with only the yaw component.

public @NotNull ModelRotation yaw()

Returns: The yaw-only rotation (0, y)

Example:

ModelRotation rotation = new ModelRotation(45.0f, 90.0f);
ModelRotation yawOnly = rotation.yaw(); // (0.0, 90.0)

radianX()

Returns the pitch in radians.

public float radianX()

Returns: The pitch in radians

Example:

ModelRotation rotation = new ModelRotation(180.0f, 0.0f);
float radians = rotation.radianX(); // ~3.14159 (π)

radianY()

Returns the yaw in radians.

public float radianY()

Returns: The yaw in radians

Example:

ModelRotation rotation = new ModelRotation(0.0f, 90.0f);
float radians = rotation.radianY(); // ~1.5708 (π/2)

packedX()

Returns the pitch packed as a byte in Minecraft protocol format.

public byte packedX()

Returns: The packed pitch value

Note: Minecraft uses packed bytes to represent rotations in network packets, where a full 360° rotation is represented by 256 discrete steps.

packedY()

Returns the yaw packed as a byte in Minecraft protocol format.

public byte packedY()

Returns: The packed yaw value

Usage Example

import kr.toxicity.model.api.tracker.ModelRotation;

// Create a rotation
ModelRotation rotation = new ModelRotation(45.0f, 90.0f);

// Access pitch and yaw
float pitch = rotation.x(); // 45.0
float yaw = rotation.y();   // 90.0

// Convert to radians
float pitchRadians = rotation.radianX();
float yawRadians = rotation.radianY();

// Extract individual components
ModelRotation pitchOnly = rotation.pitch();
ModelRotation yawOnly = rotation.yaw();

// Get packed values for network transmission
byte packedPitch = rotation.packedX();
byte packedYaw = rotation.packedY();

// Use constants
ModelRotation noRotation = ModelRotation.EMPTY;
if (rotation.equals(ModelRotation.INVALID)) {
    // Handle invalid rotation
}

Equality and Hashing

The ModelRotation record uses packed values for equality checks and hash code calculation, ensuring that rotations are compared based on their Minecraft protocol representation rather than raw float values.

See Also

• ModelScaler - For scaling models
• Tracker - For tracking model state