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| math [2019/07/05 22:38] – [VectorToAngles] korshun | math [2019/08/26 21:16] – korshun |
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| ''int ipow(int x, int y)'' | ''int ipow(int x, int y)'' |
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| Returns x^y. Uses a simple multiplication loop. | Returns x<sup>y</sup>. Uses a simple multiplication loop. |
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| ==== fpow ==== | ==== fpow ==== |
| ''fixed fpow(fixed x, fixed y)'' | ''fixed fpow(fixed x, fixed y)'' |
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| returns x^y. Supports powers below ''1.0''. Uses a simple loop with ''FixedMul'' or ''FixedDiv'', depending on whether the power is below ''1.0''. | returns x<sup>y</sup>. Supports powers below ''1.0''. Uses a simple loop with ''FixedMul'' or ''FixedDiv'', depending on whether the power is below ''1.0''. |
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| ===== Vector math ===== | ===== Vector math ===== |
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| ==== VectorLength3D ==== | ==== Length ==== |
| ''fixed VectorLength3D(fixed x, fixed y, fixed z)'' | |
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| A 3D version of [[zdoom>VectorLength]]. Returns the length of the 3D vector. | * 2D: [[zdoom>VectorLength]] |
| | * 3D: ''fixed VectorLength3D(fixed x, fixed y, fixed Z)'' |
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| | ''VectorLength3D'' is implemented efficiently as ''VectorLength(VectorLength(x, y), z)''. |
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| | ==== Dot product ==== |
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| ==== dot ==== | |
| * 2D: ''fixed dot2(fixed x1, fixed y1, fixed x2, fixed y2)'' | * 2D: ''fixed dot2(fixed x1, fixed y1, fixed x2, fixed y2)'' |
| * 3D: ''fixed dot3(fixed x1, fixed y1, fixed z1, fixed x2, fixed y2, fixed z2)'' | * 3D: ''fixed dot3(fixed x1, fixed y1, fixed z1, fixed x2, fixed y2, fixed z2)'' |
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| Returns the [[wp>dot product]] of two vectors. Shorthand for writing out ''FixedMul(x1, x2) + FixedMul(y1, y2) + ...''. | These functions return the [[wp>dot product]] of two vectors. They are shorthands for writing out ''FixedMul(x1, x2) + FixedMul(y1, y2) + ...''. |
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| | ==== Normalization ==== |
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| ==== normalize ==== | |
| * 2D: ''fixed, fixed normalize2d(fixed x, fixed y)'' | * 2D: ''fixed, fixed normalize2d(fixed x, fixed y)'' |
| * 3D: ''fixed, fixed, fixed normalize3d(fixed x, fixed y, fixed z)'' | * 3D: ''fixed, fixed, fixed normalize3d(fixed x, fixed y, fixed z)'' |
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| [[wp>Normalized vector|Normalizes]] the vector and returns the result using [[multiple return values]]. | These functions [[wp>Normalized vector|Normalize]] the input vector and return the result using [[multiple return values]]. |
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| === Example usage === | === Example usage === |
