/
transform.go
205 lines (178 loc) · 4 KB
/
transform.go
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package main
import (
"math"
"sync"
"time"
"github.com/veandco/go-sdl2/gfx"
"github.com/veandco/go-sdl2/sdl"
)
type ITransform interface {
Start()
Update(now int64)
Draw(render *sdl.Renderer)
IsRuning() bool
}
type TransformBase struct {
duration int64 //多少ms完成
startTime int64 //开始时间
}
func (tb *TransformBase) Start() {
tb.startTime = time.Now().UnixNano() / 1e6
}
func (tb *TransformBase) IsRuning() bool {
return time.Now().UnixNano()/1e6 < tb.duration+tb.startTime
}
type PosTransform struct {
TransformBase
start sdl.Point
end sdl.Point
pos sdl.Point
}
func (pt *PosTransform) Update(now int64) {
r := float32(now-pt.startTime) / float32(pt.duration)
pt.pos.X = int32(float32(pt.start.X) + float32(pt.end.X-pt.start.X)*r)
pt.pos.Y = int32(float32(pt.start.Y) + float32(pt.end.Y-pt.start.Y)*r)
}
type ImagePosTransform struct {
PosTransform
ip *ImagePair
rect sdl.Rect
center sdl.Point
angle float64
}
func NewImagePosTransform(path string, center sdl.Point, angle float64, rect *sdl.Rect, start, end sdl.Point, duration int64) ITransform {
// seelog.Debug("NewImagePosTransform")
ip := GetAssetsMgr().GetImagePair(path)
if rect == nil {
rect = &sdl.Rect{0, 0, ip.surface.W, ip.surface.H}
}
t := &ImagePosTransform{
PosTransform: PosTransform{
TransformBase: TransformBase{
duration: duration,
},
start: start,
end: end,
},
ip: ip,
rect: *rect,
center: center,
angle: angle * 360 / (math.Pi * 2),
}
return t
}
func (ipt *ImagePosTransform) Draw(render *sdl.Renderer) {
// seelog.Debug("ImagePosTransform pos;", ipt.pos, " center:", ipt.center, " angle:", ipt.angle)
render.CopyEx(ipt.ip.texture,
nil,
&sdl.Rect{ipt.pos.X, ipt.pos.Y, ipt.rect.W, ipt.rect.H},
ipt.angle,
&ipt.center,
sdl.FLIP_NONE)
}
type TransformMgr struct {
lst []ITransform
mutex sync.Mutex
}
var _TransformMgr *TransformMgr
func GetTransformMgr() *TransformMgr {
if _TransformMgr == nil {
_TransformMgr = &TransformMgr{}
}
return _TransformMgr
}
func (tm *TransformMgr) AddTransform(trans ITransform) {
tm.mutex.Lock()
defer tm.mutex.Unlock()
tm.lst = append(tm.lst, trans)
trans.Start()
}
func (tm *TransformMgr) Update() {
tm.mutex.Lock()
defer tm.mutex.Unlock()
now := time.Now().UnixNano() / 1e6
for i := 0; i < len(tm.lst); {
t := tm.lst[i]
if !t.IsRuning() {
for j := i; j < len(tm.lst)-1; j++ {
tm.lst[j] = tm.lst[j+1]
}
tm.lst = tm.lst[0 : len(tm.lst)-1]
} else {
t.Update(now)
i++
}
}
}
func (tm *TransformMgr) Draw(render *sdl.Renderer) {
tm.mutex.Lock()
defer tm.mutex.Unlock()
for _, t := range tm.lst {
t.Draw(render)
}
}
type TextPosTransform struct {
PosTransform
text string
r uint8
g uint8
b uint8
}
func NewTextPosTransform(text string,
r, g, b uint8,
start, end sdl.Point,
duration int64) *TextPosTransform {
t := &TextPosTransform{
PosTransform: PosTransform{
TransformBase: TransformBase{
duration: duration,
},
start: start,
end: end,
},
text: text,
r: r,
g: g,
b: b,
}
return t
}
func (tpt *TextPosTransform) Draw(render *sdl.Renderer) {
gfx.StringRGBA(render, tpt.pos.X, tpt.pos.Y, tpt.text, tpt.r, tpt.g, tpt.b, 255)
}
type UserEffectText struct {
TextPosTransform
uv *UserView
}
func NewUserEffectText(uv *UserView,
text string,
r, g, b uint8,
start, end sdl.Point,
duration int64) *UserEffectText {
t := &UserEffectText{
TextPosTransform: TextPosTransform{
PosTransform: PosTransform{
TransformBase: TransformBase{
duration: duration,
},
start: start,
end: end,
},
text: text,
r: r,
g: g,
b: b,
},
uv: uv,
}
return t
}
func (uet *UserEffectText) Draw(render *sdl.Renderer) {
x, y := uet.uv.us.GetUserViewPos()
xOffset, zOffset := uet.uv.um.model.GetOffset()
x -= float32(xOffset)
y -= float32(zOffset)
xStart := int32(x) + uet.pos.X - uet.start.X
yStart := int32(y) + uet.pos.Y - uet.start.Y
gfx.StringRGBA(render, xStart, yStart, uet.text, uet.r, uet.g, uet.b, 255)
}