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GAMES101复习:线性代数
2022-07-25 15:23:00 【老闫在努力】
目录
1.4 笛卡尔坐标系:可用坐标来表示向量和长度,图形学默认列向量
2.1.6 衡量两个向量有多近;分解向量;判断两向量是否在同一方向(前面和后面)
2.2.3 图形学中应用:判断一向量是否在另一向量的左侧/右侧
1.向量的基础知识
1.1 向量的表示
1.2 向量的标准化(长度)

1.3 向量加法:首尾相连三角形法则

1.4 笛卡尔坐标系:可用坐标来表示向量和长度,图形学默认列向量

2. 向量乘法
2.1 点乘:
2.1.1 结果是一个数;
2.1.2 获得夹角余弦;

2.1.3 满足交换律;

2.1.4 笛卡尔坐标系

2.1.5 投影到另一个向量

2.1.6 衡量两个向量有多近;分解向量;判断两向量是否在同一方向(前面和后面)

2.2 叉乘
判断一个点是否在三角形内部,即光栅化时判断像素点是否在三角形内部
2.2.1 结果是一个向量:垂直于两向量、右手定则

2.2.2 笛卡尔坐标系

2.2.3 图形学中应用:判断一向量是否在另一向量的左侧/右侧

2.3 直角坐标系

3. 矩阵
3.1 矩阵的转置:
3.2 单位矩阵

3.3 点乘和叉乘的矩阵表示法:

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