# inverse tangent of 1

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### Tangent spaces (Tangent space) normal mapping (normal Mapping)

// Please specify the source: Http://blog.csdn.net/BonChoix, thank you ~) Tangent spaces (Tangent space) Switching space, same as local space, world space, is one of the many coordinate systems in 3D graphics. One of the most important uses for

### The use of the inversetangent value function atan

The syntax of a atan function function function: Returns the inverse tangent value. The tangent value is equal to the number parameter value because it is an angle. The returned angle value is expressed in radians, and the range is-PI/2 to PI/2.

### Binormal and tangent

Uh, copied it a long time ago. Code ...... // Let p = V1-V0 D3dxvector3 P = V1.pos - V0.pos; // Let q = v2-V0 D3dxvector3 Q = V2.pos - V0.pos; Float S1 = V1.s - V0.s; Float T1 = V1.t - V0.t;

### Highway coordinate elevation calculation software 3.3 release

---restore content starts---Expressway coordinate elevation calculation software descriptionThe highway coordinate elevation calculation software is a very effective procedure which is summed up in many years of construction lofting work. It is a

### Tricks efficient BP (inverse propagation algorithm) in neural network training

Tricks efficient BP (inverse propagation algorithm) in neural network trainingTricks efficient BP(inverse propagation algorithm) in neural network training[Email protected]Http://blog.csdn.net/zouxy09tricks! It's a word that's filled with mystery

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### Tell me about the angles ofinverse trigonometric functions atan, radians and angles.

We are usually in the mathematical calculation is, often use trigonometric and inverse trigonometric functions, the most commonly used inverse trigonometric functions is probably atan, because this is equivalent to a given two points between the

### Poj1375intervals (point to the tangentof the circle)

Link It looks like this is called resolution ry. How to obtain the X coordinate between the intersection of the tangent from the light source to the Circle and the floor can be calculated by angle and distance ,, Angle A, B, and r can be obtained

### Recommended 10 articles for PHP cosh () functions

Returns the inverse hyperbolic sine of a number by the Asinh () function. The ASIN () function returns the inverse of a different value, and the result is a radian value between-PI/2 and PI/2. The Acosh () function returns the inverse hyperbolic

### ASP common mathematical Functions Abs Atn Cos etc detailed details

Name Abs Category Mathematical functions Prototype Abs (number) Parameters Must be selected. The number argument is a valid numeric expression of any type "Return value" Type of same number "Exception/Error" No Description Returns the absolute value

### Zfxengine Development Note Bump Mapping (2)

I_dovelemonDate: 2014/9/13Source: CSDNTopics: Bump Mapping, Tangent Space, Normal map, Height mapIntroductionIn the previous article, I described how to create a normal map from a height diagram. And promises to tell you about the important tools in

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