76 lines
2.0 KiB
Go
76 lines
2.0 KiB
Go
package animation
|
|
|
|
import (
|
|
"fmt"
|
|
"strings"
|
|
)
|
|
|
|
// BlinkAnimation 闪烁动画
|
|
type BlinkAnimation struct {
|
|
BaseAnimation
|
|
BlinkCount int // 闪烁次数
|
|
MinOpacity float64 // 最小透明度
|
|
MaxOpacity float64 // 最大透明度
|
|
}
|
|
|
|
// NewBlinkAnimation 创建一个闪烁动画
|
|
func NewBlinkAnimation(targetID string, minOpacity, maxOpacity float64, blinkCount int, duration float64, repeatCount int) *BlinkAnimation {
|
|
return &BlinkAnimation{
|
|
BaseAnimation: BaseAnimation{
|
|
Type: Blink, // 闪烁动画类型
|
|
Duration: duration,
|
|
RepeatCount: repeatCount,
|
|
Delay: 0,
|
|
TargetID: targetID,
|
|
Attributes: make(map[string]string),
|
|
},
|
|
BlinkCount: blinkCount,
|
|
MinOpacity: minOpacity,
|
|
MaxOpacity: maxOpacity,
|
|
}
|
|
}
|
|
|
|
// GenerateSVG 生成闪烁动画的SVG代码
|
|
func (a *BlinkAnimation) GenerateSVG() string {
|
|
var sb strings.Builder
|
|
|
|
// 创建一个animate元素
|
|
sb.WriteString(fmt.Sprintf("<animate href=\"#%s\" attributeName=\"opacity\" ", a.TargetID))
|
|
|
|
// 根据闪烁次数生成关键帧
|
|
var keyTimes, values []string
|
|
|
|
// 计算关键帧
|
|
for i := 0; i <= a.BlinkCount*2; i++ {
|
|
// 计算关键帧时间点
|
|
keyTime := float64(i) / float64(a.BlinkCount*2)
|
|
keyTimes = append(keyTimes, fmt.Sprintf("%.2f", keyTime))
|
|
|
|
// 计算关键帧值，交替使用最大和最小透明度
|
|
if i%2 == 0 {
|
|
values = append(values, fmt.Sprintf("%.1f", a.MaxOpacity))
|
|
} else {
|
|
values = append(values, fmt.Sprintf("%.1f", a.MinOpacity))
|
|
}
|
|
}
|
|
|
|
// 添加关键帧属性
|
|
sb.WriteString(fmt.Sprintf("keyTimes=\"%s\" ", strings.Join(keyTimes, ";")))
|
|
sb.WriteString(fmt.Sprintf("values=\"%s\" ", strings.Join(values, ";")))
|
|
sb.WriteString(fmt.Sprintf("dur=\"%gs\" ", a.Duration))
|
|
|
|
if a.RepeatCount < 0 {
|
|
sb.WriteString("repeatCount=\"indefinite\" ")
|
|
} else if a.RepeatCount > 0 {
|
|
sb.WriteString(fmt.Sprintf("repeatCount=\"%d\" ", a.RepeatCount))
|
|
}
|
|
|
|
if a.Delay > 0 {
|
|
sb.WriteString(fmt.Sprintf("begin=\"%gs\" ", a.Delay))
|
|
}
|
|
|
|
sb.WriteString("/>\n")
|
|
|
|
return sb.String()
|
|
}
|