Add function to export animation mesh data

game.go

@@ -31,6 +31,7 @@ import (
 	"time"
 	"unsafe"
 
+	"github.com/goplus/spx/internal/anim"
 	"github.com/goplus/spx/internal/audiorecord"
 	"github.com/goplus/spx/internal/coroutine"
 	"github.com/goplus/spx/internal/engine"
@@ -1351,3 +1352,20 @@ func (p *Game) GetWidget(name string) Widget {
 	}
 	return nil
 }
+
+func Gopt_ParseSkeletonAnimData(resource interface{}, sprite string, animName string) (*anim.AnimExportData, error) {
+	fs, err := resourceDir(resource)
+	if err != nil {
+		panic(err)
+	}
+	var baseDir = "sprites/" + sprite + "/"
+	var conf spriteConfig
+	err = loadJson(&conf, fs, baseDir+"index.json")
+	if err != nil {
+		return nil, err
+	}
+	animator := anim.NewAnimator(fs, baseDir, conf.Animator, conf.Avatar)
+	data, err := anim.GetExportData(animator, animName)
+	fmt.Println("Animation Frame Count ", len(data.Frames))
+	return data, err
+}

internal/anim/anim.go

@@ -56,6 +56,11 @@ type IAnimator interface {
 	Draw(screen *ebiten.Image)
 	Play(clipName string) *common.AnimClipState
 	GetClipState(clipName string) *common.AnimClipState
+	GetFrameData() *common.AnimExportFrame
+}
+
+type AnimExportData struct {
+	Frames []common.AnimExportFrame
 }
 
 const (
@@ -115,6 +120,20 @@ func NewAnimator(fs spxfs.Dir, spriteDir string, animatorPath string, avatarPath
 	return animator
 }
 
+func GetExportData(pself IAnimator, animName string) (*AnimExportData, error) {
+	data := &AnimExportData{}
+	if pself.GetClipState(animName) == nil {
+		return data, errors.New("can not find animation clip " + animName)
+	}
+	state := pself.Play(animName)
+	data.Frames = make([]common.AnimExportFrame, state.FrameCount)
+	for i := 0; i < state.FrameCount; i++ {
+		pself.Update()
+		data.Frames[i] = *pself.GetFrameData()
+	}
+	return data, nil
+}
+
 func NewAnim(name string, fps float64, totalframe int, isLoop bool) *Anim {
 	this := &Anim{}
 

internal/anim/common/animator.go

@@ -5,10 +5,14 @@ import (
 	"github.com/hajimehoshi/ebiten/v2"
 )
 
-type AnimFrameExportData struct {
+type AnimExportFrame struct {
+	Meshes []AnimExportMesh
+}
+
+type AnimExportMesh struct {
 	Indices  []uint16         `json:"Indices"`
-	Vertices []math32.Vector3 `json:"Vertices"`
 	Uvs      []math32.Vector2 `json:"Uvs"`
+	Vertices []math32.Vector3 `json:"Vertices"`
 }
 
 type Avatar struct {

internal/anim/skeleton/animator.go

@@ -130,6 +130,20 @@ func (pself *Animator) Update() {
 	}
 }
 
+func (pself *Animator) GetFrameData() *common.AnimExportFrame {
+	retVal := &common.AnimExportFrame{}
+	retVal.Meshes = make([]common.AnimExportMesh, len(pself.Mesh.SkinMesh))
+	for k := 0; k < len(pself.RederOrder); k++ {
+		i := pself.RederOrder[k]
+		item := common.AnimExportMesh{}
+		item.Indices = pself.Mesh.SkinMesh[i].Indices
+		item.Uvs = pself.Mesh.SkinMesh[i].Uvs
+		item.Vertices = pself.LogicVertices[i]
+		retVal.Meshes[i] = item
+	}
+	return retVal
+}
+
 func (pself *Animator) drawBone(screen *ebiten.Image) {
 	for i := 0; i < len(pself.RenderBones); i++ {
 		pos := pself.RenderBones[i]

internal/anim/vertex/animator.go

@@ -106,3 +106,8 @@ func (pself *Animator) Update() {
 		RenderVerteies[j].DstY = float32(pos.Y)
 	}
 }
+
+func (pself *Animator) GetFrameData() *common.AnimExportFrame {
+	// TODO (jiepengtan): implement this
+	return nil
+}