82 lines
2.0 KiB
Go
82 lines
2.0 KiB
Go
package animation
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import (
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"fmt"
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"math"
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"strings"
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)
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// WaveAnimation 波浪动画
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type WaveAnimation struct {
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BaseAnimation
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Amplitude float64 // 波浪振幅
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Frequency float64 // 波浪频率
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Direction string // 波浪方向 ("horizontal" 或 "vertical")
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}
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// NewWaveAnimation 创建一个波浪动画
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func NewWaveAnimation(targetID string, amplitude, frequency float64, direction string, duration float64, repeatCount int) *WaveAnimation {
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return &WaveAnimation{
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BaseAnimation: BaseAnimation{
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Type: Wave, // 波浪动画类型
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Duration: duration,
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RepeatCount: repeatCount,
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Delay: 0,
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TargetID: targetID,
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Attributes: make(map[string]string),
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},
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Amplitude: amplitude,
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Frequency: frequency,
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Direction: direction,
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}
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}
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// GenerateSVG 生成波浪动画的SVG代码
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func (a *WaveAnimation) GenerateSVG() string {
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var sb strings.Builder
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// 生成波浪路径
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path := a.generateWavePath()
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// 创建一个animateMotion元素
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sb.WriteString(fmt.Sprintf("<animateMotion href=\"#%s\" ", a.TargetID))
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sb.WriteString(fmt.Sprintf("path=\"%s\" ", path))
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sb.WriteString(fmt.Sprintf("dur=\"%gs\" ", a.Duration))
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if a.RepeatCount < 0 {
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sb.WriteString("repeatCount=\"indefinite\" ")
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} else if a.RepeatCount > 0 {
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sb.WriteString(fmt.Sprintf("repeatCount=\"%d\" ", a.RepeatCount))
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}
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if a.Delay > 0 {
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sb.WriteString(fmt.Sprintf("begin=\"%gs\" ", a.Delay))
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}
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sb.WriteString("/>\n")
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return sb.String()
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}
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// generateWavePath 生成波浪路径
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func (a *WaveAnimation) generateWavePath() string {
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var path strings.Builder
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path.WriteString("M0,0 ")
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// 生成正弦波路径
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points := 20 // 路径点数量
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for i := 0; i <= points; i++ {
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x := float64(i) / float64(points) * 100 // 0-100 范围
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// 计算正弦波 y 值
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y := a.Amplitude * math.Sin(a.Frequency*x*math.Pi/180)
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if a.Direction == "horizontal" {
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path.WriteString(fmt.Sprintf("L%g,%g ", x, y))
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} else { // vertical
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path.WriteString(fmt.Sprintf("L%g,%g ", y, x))
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}
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}
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return path.String()
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}
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