导入场景时，如果没有摄像机，创建一个缺省摄像机

source/utils/CMakeLists.txt

@@ -30,6 +30,19 @@ set(DV_UTILS_SCENE_SOURCE_FILES
 )
 source_group("source/scene" FILES ${DV_UTILS_SCENE_SOURCE_FILES})
 
+#################
+# camera
+#################
+set(DV_UTILS_CAMERA_INCLUDE_FILES
+	include/camera/dvu_default_camera.h
+)
+source_group("include/camera" FILES ${DV_UTILS_CAMERA_INCLUDE_FILES})
+
+set(DV_UTILS_CAMERA_SOURCE_FILES
+	source/camera/dvu_default_camera.cpp
+)
+source_group("source/camera" FILES ${DV_UTILS_CAMERA_SOURCE_FILES})
+
 include_directories(
 	${DV_AUTO_INCLUDE_PATH}
 	${DV_CORE_INCLUDE_PATH}
@@ -43,6 +56,8 @@ add_library(dv_utils SHARED
 	${DV_UTILS_SCENE_SOURCE_FILES}
 	${DV_UTILS_BUFFER_INCLUDE_FILES}
 	${DV_UTILS_BUFFER_SOURCE_FILES}
+	${DV_UTILS_CAMERA_INCLUDE_FILES}
+	${DV_UTILS_CAMERA_SOURCE_FILES}
 )
 
 target_link_libraries(dv_utils 

source/utils/include/camera/dvu_default_camera.h

@@ -0,0 +1,10 @@
+#pragma once
+
+#include "dvu_config.h"
+#include "scene/dvc_scene.h"
+
+DV_UTILS_BEGIN_NAMESPACE
+
+bool DV_UTILS_API create_default_camera(davinci::Scene& scene);
+
+DV_UTILS_END_NAMESPACE

source/utils/source/camera/dvu_default_camera.cpp

@@ -0,0 +1,55 @@
+#include "camera/dvu_default_camera.h"
+#include "scene/dvc_scene_node.h"
+#include "scene/component/dvc_camera_component.h"
+
+#include "math/dvc_matrix4.h"
+#include "math/dvc_vector3.h"
+#include "math/dvc_vector4.h"
+
+DV_UTILS_BEGIN_NAMESPACE
+
+bool create_default_camera(davinci::Scene& scene)
+{
+	//------default camera define
+	static const davinci::fVector4 kDefaultCameraRotation(
+		-0.20997299253940582f, 0.3857799470424652f, 0.09062844514846802f, 0.8937962055206299f);
+	static const davinci::fVector3 kDefaultCameraTranslation(
+		7.358891487121582f, 4.958309173583984f, 6.925790786743164f);
+	static const float kDefaultCameraAspectRatio = 1.7777777777777777f;
+	static const float kDefaultCamaraFov = 0.39959652046304894f;
+	static const float kDefaultCameraNearClip = 0.1f;
+	static const float kDefaultCameraFarClip = 100.f;
+	//-----default camera define
+
+
+	//create camera scene node
+	davinci::SceneNodePtr sceneNode = scene.newSceneNode("__DEFAULT_CAMERA__");
+
+	//transform
+	davinci::fMatrix4 transform = davinci::fMatrix4::IDENTITY;
+
+	//rotation
+	transform = davinci::fMatrix4::makeRotate(kDefaultCameraRotation) * transform;
+
+	//translation
+	transform = davinci::fMatrix4::makeTrans(kDefaultCameraTranslation) * transform;
+	sceneNode->setTransform(transform);
+
+	//camera define
+	davinci::CameraComponent::CameraDefine cameraDefine;
+	cameraDefine.aspect = kDefaultCameraAspectRatio;
+	cameraDefine.fov = kDefaultCamaraFov;
+	cameraDefine.nearClip = kDefaultCameraNearClip;
+	cameraDefine.farClip = kDefaultCameraFarClip;
+
+	//camera component
+	davinci::CameraComponentPtr cameraComponent = std::make_shared<davinci::CameraComponent>(sceneNode);
+	cameraComponent->setCameraDefine(cameraDefine);
+	sceneNode->addComponent(std::dynamic_pointer_cast<davinci::SceneComponent>(cameraComponent));
+
+	//add to scene root node
+	scene.getRootSceneNode()->addChild(sceneNode);
+	return true;
+}
+
+DV_UTILS_END_NAMESPACE

source/utils/source/scene/dvu_load_gltf.cpp

@@ -1,4 +1,8 @@
+//
+// https://registry.khronos.org/glTF/specs/2.0/glTF-2.0.html
+//
 #include "scene/dvu_load_gltf.h"
+#include "camera/dvu_default_camera.h"
 #include "scene/dvc_scene.h"
 #include "scene/dvc_scene_node.h"
 #include "scene/component/dvc_mesh_component.h"
@@ -321,6 +325,15 @@ bool _loadSceneNodes(const tinygltf::Model& gltfModel, davinci::Scene& scene, co
 		{
 			transform = davinci::fMatrix4::makeTrans(gltfNode.translation[0], gltfNode.translation[1], gltfNode.translation[2]) * transform;
 		}
+		if(!gltfNode.matrix.empty())
+		{
+			davinci::fMatrix4 matrix(
+				gltfNode.matrix[0], gltfNode.matrix[1], gltfNode.matrix[2], gltfNode.matrix[3],
+				gltfNode.matrix[4], gltfNode.matrix[5], gltfNode.matrix[6], gltfNode.matrix[7],
+				gltfNode.matrix[8], gltfNode.matrix[9], gltfNode.matrix[10], gltfNode.matrix[11],
+				gltfNode.matrix[12], gltfNode.matrix[13], gltfNode.matrix[14], gltfNode.matrix[15]);
+			transform = matrix.transpose() * transform;
+		}
 		sceneNode->setTransform(transform);
 
 		//add mesh component
@@ -515,6 +528,13 @@ bool load_scene_from_gltf(const char* szSceneFiles, davinci::Scene& scene)
 		return false;
 	}
 
+	//create default camera
+	davinci::SceneNodeConstPtr cameraNode = scene.getNodeWithComponent<davinci::CameraComponent>();
+	if (cameraNode.get()==nullptr)
+	{
+		create_default_camera(scene);
+	}
+
 	return true;
 }