新增 gltf包围盒类

src/render/glTFBoundingBox.cpp

@@ -0,0 +1,52 @@
+#include "glTFBoundingBox.h"
+
+GLTFLOADER_NAMESPACE_BEGIN
+
+
+glTFBoundingBOX::glTFBoundingBOX()
+	: m_isValid(false)
+	, m_Min(glm::vec3(0,0,0))
+	, m_Max(glm::vec3(1,1,1))
+{
+}
+
+glTFBoundingBOX::glTFBoundingBOX(glm::vec3 min, glm::vec3 max)
+	: m_isValid(false)
+	, m_Min(min)
+	, m_Max(max)
+{
+}
+
+glTFBoundingBOX::~glTFBoundingBOX()
+{
+}
+
+glTFBoundingBOX glTFBoundingBOX::getAABB(glm::mat4 matrix)
+{
+	glm::vec3 min = glm::vec3(matrix[3]);
+	glm::vec3 max = min;
+	glm::vec3 v0, v1;
+
+	glm::vec3 right = glm::vec3(matrix[0]);
+	v0 = right * m_Min.x;
+	v1 = right * m_Max.x;
+	min += glm::min(v0, v1);
+	max += glm::max(v0, v1);
+
+	glm::vec3 up = glm::vec3(matrix[1]);
+	v0 = up * m_Min.y;
+	v1 = up * m_Max.y;
+	min += glm::min(v0, v1);
+	max += glm::max(v0, v1);
+
+	glm::vec3 back = glm::vec3(matrix[2]);
+	v0 = back * m_Min.z;
+	v1 = back * m_Max.z;
+	min += glm::min(v0, v1);
+	max += glm::max(v0, v1);
+
+	return glTFBoundingBOX(min, max);
+}
+
+
+GLTFLOADER_NAMESPACE_END

src/render/glTFBoundingBox.h

@@ -0,0 +1,44 @@
+#ifndef GLTFBOUNDINGBOX_H
+#define GLTFBOUNDINGBOX_H
+
+#include "glTFModel_Common.h"
+#include <glm/glm.hpp>
+
+GLTFLOADER_NAMESPACE_BEGIN
+
+class glTFBoundingBOX
+{
+public:
+	glTFBoundingBOX();
+	glTFBoundingBOX(glm::vec3 min, glm::vec3 max);
+	~glTFBoundingBOX();
+
+	glTFBoundingBOX getAABB(glm::mat4 matrix);
+
+private:
+
+	glm::vec3 m_Min;
+	glm::vec3 m_Max;
+	bool m_isValid = false;
+};
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+GLTFLOADER_NAMESPACE_END
+
+#endif // !GLTFBOUNDINGBOX_H
+

src/render/glTFModel.cpp

@@ -29,7 +29,7 @@
 	glTFModel::BoundingBox::BoundingBox(glm::vec3 min, glm::vec3 max) : min(min), max(max) {
 	};
 
-	//Axis-Aligned Bounding Box),¼ò³Æ AABB
+	//Axis-Aligned Bounding Box),简称 AABB
 	glTFModel::BoundingBox glTFModel::BoundingBox::getAABB(glm::mat4 m) {
 		glm::vec3 min = glm::vec3(m[3]);
 		glm::vec3 max = min;

src/render/glTFModel.h

@@ -1,4 +1,4 @@
-#pragma once
+#pragma once
 
 #include <assert.h>
 #include <stdio.h>

src/render/glTFModel_Common.h

@@ -1,4 +1,4 @@
-#pragma once
+#pragma once
 
 /// 命名空间宏
 #define GLTFLOADER_NAMESPACE_BEGIN namespace glTFLoader {