Added BoneAttachment component

src/Engine/Rendering/BoneAttachmentSystem.cpp

@@ -0,0 +1,71 @@
+#include "Rendering/BoneAttachmentSystem.h"
+
+void BoneAttachmentSystem::UpdateComponent(EntityWrapper& entity, ComponentWrapper& BoneAttachmentComponent, double dt)
+{
+
+    if(!entity.HasComponent("Transform")) {
+        return;
+    }
+
+    auto parent = entity.FirstParentWithComponent("Animation");
+    if (!parent.HasComponent("Model")) {
+        return;
+    }
+    Model* model;
+    try {
+        model = ResourceManager::Load<::Model, true>(parent["Model"]["Resource"]);
+    } catch (const std::exception&) {
+        return;
+    }
+
+
+    Skeleton* skeleton = model->m_RawModel->m_Skeleton;
+    const Skeleton::Animation* animation = skeleton->GetAnimation(parent["Animation"]["Name"]);
+
+    if (!animation) {
+        return;
+    }
+
+    int id = skeleton->GetBoneID(entity["BoneAttachment"]["Name"]);
+
+    if(id == -1) {
+        return;
+    }
+
+    int currentKeyframeIndex = skeleton->GetKeyframe(*animation, parent["Animation"]["Time"]);
+
+    const Skeleton::Animation::Keyframe& currentFrame = animation->Keyframes[currentKeyframeIndex];
+    const Skeleton::Animation::Keyframe& nextFrame = animation->Keyframes[(currentKeyframeIndex + 1) % animation->Keyframes.size()];
+    float alpha = ((double)parent["Animation"]["Time"] - currentFrame.Time) / (nextFrame.Time - currentFrame.Time);
+
+    glm::mat4 boneTransform = skeleton->GetBoneTransform(skeleton->Bones[id], currentFrame, nextFrame, alpha, glm::mat4(1));
+
+
+
+    glm::vec3 scale;
+    glm::quat rotation;
+    glm::vec3 translation;
+    glm::vec3 skew;
+    glm::vec4 perspective;
+    glm::decompose(boneTransform, scale, rotation, translation, skew, perspective);
+
+    glm::vec3 angles;
+    angles.y = asin(-boneTransform[0][2]);
+    if (cos(angles.y) != 0) {
+        angles.x = atan2(boneTransform[1][2], boneTransform[2][2]);
+        angles.z = atan2(boneTransform[0][1], boneTransform[0][0]);
+    } else {
+        angles.x = atan2(-boneTransform[2][0], boneTransform[1][1]);
+        angles.z = 0;
+    }
+
+    if ((bool)entity["BoneAttachment"]["InheritPosition"]) {
+        (glm::vec3&)entity["Transform"]["Position"] = translation + (glm::vec3)entity["BoneAttachment"]["PositionOffset"];
+    }
+    if ((bool)entity["BoneAttachment"]["InheritOrientation"]) {
+        (glm::vec3&)entity["Transform"]["Orientation"] = angles  + (glm::vec3)entity["BoneAttachment"]["OrientationOffset"];
+    }
+    if ((bool)entity["BoneAttachment"]["InheritScale"]) {
+        (glm::vec3&)entity["Transform"]["Scale"] = scale  * (glm::vec3)entity["BoneAttachment"]["ScaleOffset"];
+    }
+}