[8bbdfdd] | 1 | #pragma once |
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[9a83ccd] | 2 | #include "math.hfa" |
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| 3 | #include <iostream.hfa> |
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[8bbdfdd] | 4 | |
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| 5 | //---------------------- Vector Types ---------------------- |
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| 6 | // TODO: make generic, as per glm |
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| 7 | |
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[9a83ccd] | 8 | |
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[8bbdfdd] | 9 | struct vec2 { |
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| 10 | float x, y; |
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| 11 | }; |
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| 12 | |
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[9a83ccd] | 13 | void ?{}( vec2 & v, float x, float y) { |
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| 14 | v.[x, y] = [x, y]; |
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| 15 | } |
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| 16 | |
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| 17 | forall( dtype ostype | ostream( ostype ) ) { |
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| 18 | ostype & ?|?( ostype & os, const vec2& v) with (v) { |
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| 19 | if ( sepPrt( os ) ) fmt( os, "%s", sepGetCur( os ) ); |
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| 20 | fmt( os, "<%g,%g>", x, y); |
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| 21 | return os; |
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| 22 | } |
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| 23 | void ?|?( ostype & os, const vec2 v ) { |
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| 24 | (ostype &)(os | v); ends( os ); |
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| 25 | } |
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| 26 | } |
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| 27 | |
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| 28 | vec2 ?-?(const vec2& u, const vec2& v) { |
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| 29 | return [u.x - v.x, u.y - v.y]; |
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| 30 | } |
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[44f41997] | 31 | vec2 ?*?(const vec2& v, float scalar) with (v) { |
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| 32 | return [x * scalar, y * scalar]; |
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| 33 | } |
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| 34 | vec2 ?/?(const vec2& v, float scalar) with (v) { |
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| 35 | return [x / scalar, y / scalar]; |
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| 36 | } |
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[9a83ccd] | 37 | |
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| 38 | /* //---------------------- Geometric Functions ---------------------- */ |
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| 39 | /* // These functions implement the Geometric Functions section of GLSL */ |
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[8bbdfdd] | 40 | |
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[9a83ccd] | 41 | static inline float dot(const vec2& u, const vec2& v) { |
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| 42 | return u.x * v.x + u.y * v.y; |
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[8bbdfdd] | 43 | } |
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| 44 | |
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| 45 | static inline float length(const vec2& v) { |
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| 46 | return sqrt(dot(v, v)); |
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| 47 | } |
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[44f41997] | 48 | |
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| 49 | // Returns the distance betwwen v1 and v2, i.e., length(p0 - p1). |
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| 50 | static inline float distance(const vec2& v1, const vec2& v2) { |
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| 51 | return length(v1 - v2); |
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| 52 | } |
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| 53 | |
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| 54 | static inline vec2 normalize(const vec2& v) { |
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| 55 | // TODO(dkobets) -- show them inversesqrt |
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| 56 | // https://github.com/g-truc/glm/blob/269ae641283426f7f84116f2fe333472b9c914c9/glm/detail/func_exponential.inl |
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| 57 | /* return v * inversesqrt(dot(v, v)); */ |
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| 58 | return v / sqrt(dot(v, v)); |
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| 59 | } |
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