90 lines
1.6 KiB
Go
90 lines
1.6 KiB
Go
package entity
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import (
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"log"
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"github.com/veandco/go-sdl2/sdl"
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)
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type penguin struct {
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worldPosition *sdl.Point
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currentAnimation *entityAnimation
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animationStep int32
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facingRight bool
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}
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func NewPenguin(renderer *sdl.Renderer) *penguin {
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position := sdl.Point{}
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p := penguin{
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worldPosition: &position,
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currentAnimation: penguinAnimations[PENGUIN_DEFAULT],
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animationStep: 0,
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facingRight: true,
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}
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return &p
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}
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func (p *penguin) Draw() error {
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step := p.animationStep / p.currentAnimation.speed
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err := p.currentAnimation.Draw(step, p.worldPosition)
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if err != nil {
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return err
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}
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p.animationStep = 1 + p.animationStep
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return nil
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}
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func (p *penguin) SetPosition(point *sdl.Point) {
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p.worldPosition = point
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}
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func (p *penguin) SetAnimation(name string) {
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a, exists := penguinAnimations[name]
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if !exists {
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log.Printf("animation does not exist: %v", name)
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a = penguinAnimations[PENGUIN_DEFAULT]
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}
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if a != p.currentAnimation {
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p.animationStep = 0
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}
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p.currentAnimation = a
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}
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func (p *penguin) MoveRight() {
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p.worldPosition.X += 1
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p.SetAnimation(PENGUIN_WALK_RIGHT)
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p.facingRight = true
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}
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func (p *penguin) MoveLeft() {
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p.worldPosition.X -= 1
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p.SetAnimation(PENGUIN_WALK_LEFT)
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p.facingRight = false
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}
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func (p *penguin) MoveUp() {
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// (0,0) is the top left, so negative y moves up
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p.worldPosition.Y -= 1
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}
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func (p *penguin) MoveDown() {
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// positive y moves down
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p.worldPosition.Y += 1
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}
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func (p *penguin) StopMove() {
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if p.facingRight {
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p.SetAnimation(PENGUIN_STATIONARY_RIGHT)
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} else {
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p.SetAnimation(PENGUIN_STATIONARY_LEFT)
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}
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}
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