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Published: Aug 19, 2021 License: BSD-2-Clause Imports: 4 Imported by: 29



Package animation



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const (
	STEP        = InterpolationType("STEP")        // The animated values remain constant to the output of the first keyframe, until the next keyframe.
	LINEAR      = InterpolationType("LINEAR")      // The animated values are linearly interpolated between keyframes. Spherical linear interpolation (slerp) is used to interpolate quaternions.

The various interpolation types.


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type Animation

type Animation struct {
	// contains filtered or unexported fields

Animation is a keyframe animation, containing channels. Each channel animates a specific property of an object. Animations can span multiple objects and properties.

func NewAnimation

func NewAnimation() *Animation

NewAnimation creates and returns a pointer to a new Animation object.

func (*Animation) AddChannel

func (anim *Animation) AddChannel(ch IChannel)

AddChannel adds a channel to the animation.

func (*Animation) Loop

func (anim *Animation) Loop() bool

Loop returns whether the animation is looping.

func (*Animation) Name

func (anim *Animation) Name() string

Name returns the animation name.

func (*Animation) Paused

func (anim *Animation) Paused() bool

Paused returns whether the animation is paused.

func (*Animation) Reset

func (anim *Animation) Reset()

Reset resets the animation to the beginning.

func (*Animation) SetLoop

func (anim *Animation) SetLoop(state bool)

SetLoop sets whether the animation is looping.

func (*Animation) SetName

func (anim *Animation) SetName(name string)

SetName sets the animation name.

func (*Animation) SetPaused

func (anim *Animation) SetPaused(state bool)

SetPaused sets whether the animation is paused.

func (*Animation) SetSpeed

func (anim *Animation) SetSpeed(speed float32)

SetSpeed sets the animation speed.

func (*Animation) SetStart

func (anim *Animation) SetStart(v float32)

SetStart sets the initial time offset value.

func (*Animation) Speed

func (anim *Animation) Speed() float32

Speed returns the animation speed.

func (*Animation) Update

func (anim *Animation) Update(delta float32)

Update interpolates and updates the target values for each channel. If the animation is paused, returns false. If the animation is not paused, returns true if the input value is inside the key frames ranges or false otherwise.

type Channel

type Channel struct {
	// contains filtered or unexported fields

A Channel associates an animation parameter channel to an interpolation sampler

func (*Channel) InterpolationTangents

func (c *Channel) InterpolationTangents() (inTangent, outTangent math32.ArrayF32)

InterpolationTangents returns the interpolation tangents

func (*Channel) InterpolationType

func (c *Channel) InterpolationType() InterpolationType

InterpolationType returns the current interpolation type.

func (*Channel) Keyframes

func (c *Channel) Keyframes() math32.ArrayF32

Keyframes returns the keyframe buffer.

func (*Channel) SetBuffers

func (c *Channel) SetBuffers(keyframes, values math32.ArrayF32)

SetBuffers sets the keyframe and value buffers.

func (*Channel) SetInterpolationTangents

func (c *Channel) SetInterpolationTangents(inTangent, outTangent math32.ArrayF32)

SetInterpolationTangents sets the interpolation tangents.

func (*Channel) SetInterpolationType

func (c *Channel) SetInterpolationType(it InterpolationType)

SetInterpolationType sets the interpolation type for this channel.

func (*Channel) Update

func (c *Channel) Update(time float32)

Update finds the keyframe preceding the specified time. Then, calls a stored function to interpolate the relevant values and update the target.

func (*Channel) Values

func (c *Channel) Values() math32.ArrayF32

Values returns the value buffer.

type IChannel

type IChannel interface {
	Update(time float32)
	SetBuffers(keyframes, values math32.ArrayF32)
	Keyframes() math32.ArrayF32
	Values() math32.ArrayF32
	SetInterpolationType(it InterpolationType)

IChannel is the interface for all channel types.

type InterpolationType

type InterpolationType string

InterpolationType specifies the interpolation type.

type MorphChannel

type MorphChannel struct {
	// contains filtered or unexported fields

MorphChannel is the IChannel for morph geometries.

func NewMorphChannel

func NewMorphChannel(mg *geometry.MorphGeometry) *MorphChannel

type NodeChannel

type NodeChannel struct {
	// contains filtered or unexported fields

NodeChannel is the IChannel for all node transforms.

type PositionChannel

type PositionChannel NodeChannel

PositionChannel is the animation channel for a node's position.

func NewPositionChannel

func NewPositionChannel(node core.INode) *PositionChannel

type RotationChannel

type RotationChannel NodeChannel

RotationChannel is the animation channel for a node's rotation.

func NewRotationChannel

func NewRotationChannel(node core.INode) *RotationChannel

type ScaleChannel

type ScaleChannel NodeChannel

ScaleChannel is the animation channel for a node's scale.

func NewScaleChannel

func NewScaleChannel(node core.INode) *ScaleChannel

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