Merge pull request #474 from JupiterRider/model_animation

ModelAnimation improvements

examples/models/animation/main.go

@@ -21,8 +21,6 @@
 package main
 
 import (
-	"unsafe"
-
 	rl "github.com/gen2brain/raylib-go/raylib"
 )
 
@@ -76,9 +74,8 @@ func main() {
 		rl.DrawModelEx(model, position, rl.NewVector3(1, 0, 0), -90, rl.NewVector3(1, 1, 1), rl.White)
 		// Draw translation cubes
 		for i := int32(0); i < model.BoneCount; i++ {
-			framePose := unsafe.Slice(anims[0].FramePoses, anims[0].FrameCount)
+			pose := anims[0].GetFramePose(animFrameCount, int(i))
-			trans := unsafe.Slice(framePose[animFrameCount], model.BoneCount)
+			rl.DrawCube(pose.Translation, 0.2, 0.2, 0.2, rl.Red)
-			rl.DrawCube(trans[i].Translation, 0.2, 0.2, 0.2, rl.Red)
 		}
 		rl.DrawGrid(10, 1)
 

examples/models/gltf_loading/main.go

@@ -62,7 +62,7 @@ func main() {
 
 		rl.EndMode3D()
 
-		rl.DrawText("current animation number: "+fmt.Sprint(animIndex), 10, 10, 10, rl.Black)
+		rl.DrawText(fmt.Sprintf("current animation: %s [%d]", animPlaying.GetName(), animIndex), 10, 10, 10, rl.Black)
 		rl.DrawText("UP/DOWN ARROW KEYS CHANGE ANIMATION", 10, 30, 10, rl.Black)
 
 		rl.EndDrawing()

examples/models/m3d_loading/main.go

@@ -19,9 +19,7 @@
 package main
 
 import (
-	"unsafe"
+	rl "github.com/gen2brain/raylib-go/raylib"
-
-	"github.com/gen2brain/raylib-go/raylib"
 )
 
 const (
@@ -116,9 +114,8 @@ func main() {
 		if drawSkeleton {
 			modelBones := model.GetBones()
 			modelPoses := model.GetBindPose()
-			animBones := unsafe.Slice(anims[animID].Bones, anims[animID].BoneCount)
+			anim := anims[animID]
-			animPoses := unsafe.Slice(anims[animID].FramePoses, anims[animID].FrameCount)
+			animBones := anim.GetBones()
-			transforms := unsafe.Slice(animPoses[animFrameCounter], anims[animID].BoneCount)
 			for bone := 0; bone < int(model.BoneCount)-1; bone++ {
 				if !animPlaying || animsCount == 0 {
 					// Display the bind-pose skeleton
@@ -128,9 +125,11 @@ func main() {
 					}
 				} else {
 					// // Display the frame-pose skeleton
-					rl.DrawCube(transforms[bone].Translation, 0.05, 0.05, 0.05, rl.Red)
+					pos := anim.GetFramePose(animFrameCounter, bone).Translation
+					rl.DrawCube(pos, 0.05, 0.05, 0.05, rl.Red)
 					if animBones[bone].Parent >= 0 {
-						rl.DrawLine3D(transforms[bone].Translation, transforms[animBones[bone].Parent].Translation, rl.Red)
+						endPos := anim.GetFramePose(animFrameCounter, int(animBones[bone].Parent)).Translation
+						rl.DrawLine3D(pos, endPos, rl.Red)
 					}
 				}
 			}

raylib/raylib.go

@@ -929,7 +929,29 @@ type ModelAnimation struct {
 	FrameCount int32
 	Bones      *BoneInfo
 	FramePoses **Transform
-	Name       [32]int8
+	Name       [32]uint8
+}
+
+// GetBones returns the bones information (skeleton) of a ModelAnimation as go slice
+func (m ModelAnimation) GetBones() []BoneInfo {
+	return unsafe.Slice(m.Bones, m.BoneCount)
+}
+
+// GetFramePose returns the Transform for a specific bone at a specific frame
+func (m ModelAnimation) GetFramePose(frame, bone int) Transform {
+	framePoses := unsafe.Slice(m.FramePoses, m.FrameCount)
+	return unsafe.Slice(framePoses[frame], m.BoneCount)[bone]
+}
+
+// GetName returns the ModelAnimation's name as go string
+func (m ModelAnimation) GetName() string {
+	var end int
+	for end = range m.Name {
+		if m.Name[end] == 0 {
+			break
+		}
+	}
+	return string(m.Name[:end])
 }
 
 // RayCollision type - ray hit information