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effect.go
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effect.go
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package main
import (
"bytes"
"errors"
"io"
"math"
"math/rand"
"os"
"strconv"
"sync"
"time"
)
var (
EffectZeroDurationError = errors.New("zero duration not accepted")
EffectConfigurationError = errors.New("configuration error")
effectShakeTf1 = ElasticTimeFuncGenerator(1, 1.5)
effectShakeTf2 = ElasticTimeFuncGenerator(1.5, 2)
weatherSprite = NewContentSprite([]byte("/"))
weatherSpriteDone = NewContentSprite([]byte("+"))
)
type EffectManager struct {
render Renderer
update *Updater
shakeSeq []float64
shakeMaxAmplitude float64
shakeDuration time.Duration
shakeFrame int
weatherMap []*WeatherEffect
m sync.Mutex
}
func (receiver *EffectManager) ApplyGlobalShake(power float64, duration time.Duration) error {
if duration <= 0 {
return EffectZeroDurationError
}
receiver.m.Lock()
defer receiver.m.Unlock()
seqCount := int(math.Max(float64(duration)/float64(CYCLE), 1.0)) //real cycle > CYCLE
shFrame := receiver.shakeFrame
frameLen := len(receiver.shakeSeq)
if DEBUG_SHAKE {
logger.Printf("set shake for %d frame with power %f \n", seqCount, power)
}
totalSeqCount := float64(seqCount)
shakeAmplitude := receiver.shakeMaxAmplitude * power
for i := shFrame; i < frameLen-1 && seqCount > 0; i += 2 {
tf := effectShakeTf1(float64(seqCount)/totalSeqCount) * shakeAmplitude
tf2 := effectShakeTf2(float64(seqCount)/totalSeqCount) * shakeAmplitude
receiver.shakeSeq[i] = math.Max(math.Min(tf+receiver.shakeSeq[i], receiver.shakeMaxAmplitude), -receiver.shakeMaxAmplitude)
receiver.shakeSeq[i+1] = math.Max(math.Min(tf2+receiver.shakeSeq[i+1], receiver.shakeMaxAmplitude), -receiver.shakeMaxAmplitude)
if DEBUG_SHAKE {
logger.Printf("amplify shake wave, new values is : %f %f\n", receiver.shakeSeq[i], receiver.shakeSeq[i+1])
}
seqCount--
}
for seqCount > 0 {
tf := effectShakeTf1(float64(seqCount)/totalSeqCount) * shakeAmplitude
tf2 := effectShakeTf2(float64(seqCount)/totalSeqCount) * shakeAmplitude
receiver.shakeSeq = append(receiver.shakeSeq, tf, tf2)
if DEBUG_SHAKE {
logger.Printf("shake wave, values is : %f %f\n", tf, tf2)
}
seqCount--
}
receiver.shakeDuration = time.Duration(math.Max(float64(receiver.shakeDuration), float64(duration)))
return nil
}
func (receiver *EffectManager) ApplyGlobalWeather(name string, power float64, duration time.Duration) error {
w := receiver.render.(*Render).output.Width() //todo refactor
h := receiver.render.(*Render).output.Height()
totalSpace := w * h
realSpace := int(float64(totalSpace) * power)
rate := totalSpace / realSpace
if rate <= 0 {
return EffectConfigurationError
}
for i := 1; i < totalSpace; i = i + rate {
effect, _ := NewWeatherEffect(&Point{
X: float64(totalSpace % i),
Y: float64(totalSpace / i),
}, w, h)
effect.Sprite = weatherSprite
effect.EndSprite = weatherSpriteDone
receiver.weatherMap = append(receiver.weatherMap, effect)
receiver.render.Add(effect)
receiver.update.Add(effect)
}
return nil
}
func (receiver *EffectManager) CancelAllEffects() error {
receiver.m.Lock()
defer receiver.m.Unlock()
receiver.shakeDuration = 0
receiver.shakeFrame = 0
receiver.shakeSeq = receiver.shakeSeq[0:0]
receiver.render.SetOffset(0, 0)
return nil
}
func (receiver *EffectManager) Execute(timeLeft time.Duration) {
receiver.m.Lock()
defer receiver.m.Unlock()
if receiver.shakeDuration > 0 {
receiver.render.SetOffset(int(receiver.shakeSeq[receiver.shakeFrame]), int(receiver.shakeSeq[receiver.shakeFrame+1]))
receiver.shakeFrame += 2
receiver.shakeDuration -= timeLeft
} else {
receiver.shakeDuration = 0
receiver.shakeFrame = 0
receiver.shakeSeq = receiver.shakeSeq[0:0]
receiver.render.SetOffset(0, 0)
}
//todo other effects
}
func NewEffectManager(r Renderer, u *Updater) (*EffectManager, error) {
return &EffectManager{
render: r,
update: u,
shakeSeq: make([]float64, 0, 256),
weatherMap: make([]*WeatherEffect, 0, 256),
shakeMaxAmplitude: 3,
shakeDuration: 0,
shakeFrame: 0,
}, nil
}
func EffectAnimNormalizeNewLine(path string, length int) {
for i := 0; i < length; i++ {
path := "./sprite/" + path + "_" + strconv.Itoa(i)
byte, err := os.ReadFile(path)
if err == nil {
writer, err := os.OpenFile(path, os.O_TRUNC|os.O_WRONLY, 0665)
if err != nil {
logger.Println(err)
}
if seed != 0 {
rand.Seed(seed)
}
EffectNormalizeNewLine(bytes.NewBuffer(byte), writer)
writer.Close()
}
}
}
func EffectAnimDisappear(path string, length int, seed int64) {
for i := 0; i < length; i++ {
path := "./sprite/" + path + "_" + strconv.Itoa(i)
byte, err := os.ReadFile(path)
if err == nil {
writer, err := os.OpenFile(path, os.O_TRUNC|os.O_WRONLY, 0665)
if err != nil {
logger.Println(err)
}
if seed != 0 {
rand.Seed(seed)
}
EffectDisappear(bytes.NewBuffer(byte), writer, 1.0/(float64(length-i)+0.1))
writer.Close()
}
}
}
func EffectAnimInterference(path string, length int, power float64) {
for i := 0; i < length; i++ {
path := "./sprite/" + path + "_" + strconv.Itoa(i)
byte, err := os.ReadFile(path)
if err == nil {
writer, err := os.OpenFile(path, os.O_TRUNC|os.O_WRONLY, 0665)
if err != nil {
logger.Println(err)
}
EffectDisappear(bytes.NewBuffer(byte), writer, power)
writer.Close()
}
}
}
func EffectAnimVerFlip(path string, length int) {
for i := 0; i < length; i++ {
path := "./sprite/" + path + "_" + strconv.Itoa(i)
byte, err := os.ReadFile(path)
if err == nil {
writer, err := os.OpenFile(path, os.O_TRUNC|os.O_WRONLY, 0665)
if err != nil {
logger.Println(err)
}
if seed != 0 {
rand.Seed(seed)
}
EffectVerFlip(bytes.NewBuffer(byte), writer)
writer.Close()
}
}
}
func EffectDisappear(reader io.Reader, writer io.Writer, power float64) {
buf := make([]byte, 1, 1)
for {
rLen, _ := reader.Read(buf)
if rLen < 1 {
break
}
if buf[0] == 32 || buf[0] == 10 {
//nope
} else if rand.Float64() < power {
buf[0] = 32
}
writer.Write(buf)
}
}
func EffectNormalizeNewLine(reader io.Reader, writer io.Writer) {
buf := make([]byte, 256, 256)
all := make([]byte, 0)
for {
rLen, err := reader.Read(buf)
all = append(all, buf[0:rLen]...)
if err == io.EOF {
break
}
}
parted := bytes.Split(all, []byte{13, 10})
partLen := len(parted)
for i := 0; i < partLen/2; i++ {
parted[i], parted[partLen-1-i] = parted[partLen-1-i], parted[i]
}
writer.Write(bytes.Join(parted, []byte{10}))
}
func EffectHorFlip(reader io.Reader, writer io.Writer) {
buf := make([]byte, 256, 256)
all := make([]byte, 0)
for {
rLen, err := reader.Read(buf)
all = append(all, buf[0:rLen]...)
if err == io.EOF {
break
}
}
parted := bytes.Split(all, []byte{10})
partLen := len(parted)
for i := 0; i < partLen/2; i++ {
parted[i], parted[partLen-1-i] = parted[partLen-1-i], parted[i]
}
writer.Write(bytes.Join(parted, []byte{10}))
}
func EffectVerFlip(reader io.Reader, writer io.Writer) {
buf := make([]byte, 256, 256)
all := make([]byte, 0)
parted := make([][]byte, 0)
for {
rLen, err := reader.Read(buf)
if rLen > 0 {
all = append(all, buf[0:rLen]...)
parted = bytes.Split(all, []byte{10})
pLen := len(parted)
if pLen > 1 {
if all[len(all)-1] != 10 {
all = parted[pLen-1]
parted = parted[:pLen-1]
} else {
all = all[0:0]
}
for _, writeBuff := range parted {
wbLen := len(writeBuff)
for i := 0; i < wbLen/2; i++ {
writeBuff[i], writeBuff[wbLen-1-i] = writeBuff[wbLen-1-i], writeBuff[i]
}
writer.Write(writeBuff)
writer.Write([]byte{10})
}
}
}
if err == io.EOF {
break
}
}
if lAll := len(all); lAll > 0 {
for i := 0; i < lAll/2; i++ {
all[i], all[lAll-1-i] = all[lAll-1-i], all[i]
}
writer.Write(all)
}
}