Method LoadSkin

loader/gltf/loader.go:274–312

LoadSkin loads the skin with specified index.

(skinIdx int)

// LoadSkin loads the skin with specified index.
func (g *GLTF) LoadSkin(skinIdx int) (*graphic.Skeleton, error) {

	// Check if provided skin index is valid
	if skinIdx < 0 || skinIdx >= len(g.Skins) {
		return nil, fmt.Errorf("invalid skin index")
	}
	skinData := g.Skins[skinIdx]
	// Return cached if available
	if skinData.cache != nil {
		log.Debug("Fetching Skin %d (cached)", skinIdx)
		return skinData.cache, nil
	}
	log.Debug("Loading Skin %d", skinIdx)

	// Create Skeleton and set it on Rigged mesh
	skeleton := graphic.NewSkeleton()

	// Load inverseBindMatrices
	ibmData, err := g.loadAccessorF32(skinData.InverseBindMatrices, "ibm", []string{MAT4}, []int{FLOAT})
	if err != nil {
		return nil, err
	}

	// Add bones
	for i := range skinData.Joints {
		jointNode, err := g.LoadNode(skinData.Joints[i])
		if err != nil {
			return nil, err
		}
		var ibm math32.Matrix4
		ibmData.GetMatrix4(16*i, &ibm)
		skeleton.AddBone(jointNode.GetNode(), &ibm)
	}

	// Cache skin
	g.Skins[skinIdx].cache = skeleton

	return skeleton, nil
}

// LoadAnimationByName loads the animations with specified name.
// If there are multiple animations with the same name it loads the first occurrence.