In Unity3d, vector3.dot means to find the dot product of two vectors; Vector3.cross represents the cross product of two vectors.The result of the dot product calculation is a numerical value, and the result of the cross
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Author: Beiyu http://www.cnblogs.com/beiyuoi/.
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Preface
I personally summarized the concept and application of dot product cross product qwq.
Update record
20160521-Point product/Cross Product define basic application properties
Defined in mathematics, dotproduct (scalarproduct)Scalar Product, Point product, and point Multiplication) Is a binary operation that accepts two vectors on the real number R and returns a real number scalar. It is the standard inner product of Euclidean space. Two vectors A = [a1, a2 ,..., An] and B = [b1, b2 ,..., The dot
, and then the area for each triangle, the area, in the case of precision requirements, do not use Helen-Qin formula, Helen Formula may be more serious in terms of accuracy loss, and the computational capacity is very large. The most suitable method to solve the polygon area is the vector product method. Vertex is P k (K=1,2,3...N) polygon with vertex coordinates (x1,y1", (x2,y2), (X3,y3) ... (Xn,yn). In computational geometry, we know that the are
First, the cosine theorem is proved:Having an edge of a, B, c, the corresponding angle is a_angle, B _angle, c_angleThe following relationship can be found as a diagonal line from the point to the corresponding edge:(1)A = B * cos c_angle + c * cos B _angle(2)B = a * cos c_angle + c * cos a_angle(3)C = a * cos B _angle + B * cos a_angleFor (1) *:A ^ 2 = a * B * cos c_angle + a * c * cos B _angleThere are also:B ^ 2 = B * a * cos c_angle + B * c * cos a_angleC ^ 2 = c * a * cos B _angle + c * B *
Total time limit:
1000ms
Memory Limit:
65536kB
Describe
In linear algebra and computational geometry, the vector dot product is a very important operation.
Given two n-dimensional vectors a= (a1,a2,..., an) and b= (B1,b2,..., bn), find dot produc
1.Cameraforwardvector = Gameobject.find ("Forwardpoint"). Transform.position-camera.main.transform.position;Point2cameravector =kk.position-camera.main.transform.position;Float Hh=mathf.acos (Vector3.dot (cameraforwardvector.normalized, point2cameravector.normalized)) * MATHF.RAD2DEG;Debug.logerror (HH);if (hh>=0hh{Display the data information of the device, which is obtained from the database or local txt.Showinfostate = Showinfostate.load;Roam.move_
09: Vector dot Product calculation
Total time limit:
1000ms
Memory Limit:
65536kB
Describe
In linear algebra and computational geometry, the vector dot product is a very important operation.
Given two n-dimensional
Use vector dot product to rotate the model around the center
How to rotate a model around the center in a 3D space? This problem sounds easy, but after my practice, I found it quite difficult. In the initial stages of studying OpenGL and DirectX, I believe this problem still hurts everyone's brains. How can this function be implemented? I think you may need to go back and review our high school knowledge. T
Total time limit:
1000ms
Memory Limit:
65536kB
Describe
In linear algebra and computational geometry, the vector dot product is a very important operation.
Given two n-dimensional vectors a= (a1,a2,..., an) and b= (B1,b2,..., bn), find dot pr
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