63 lines
1.8 KiB
Plaintext
63 lines
1.8 KiB
Plaintext
sqrtf :: #foreign (value: F32): F32
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cosf :: #foreign (value: F32): F32
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sinf :: #foreign (value: F32): F32
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Vec2I :: struct;; x: S64; y: S64
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Vec2 :: struct;; x: F32; y: F32
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Vec3 :: struct;; x: F32; y: F32; z: F32
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Vec3_Cross :: (a: Vec3, b: Vec3): Vec3
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result := Vec3{
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a.y * b.z - a.z * b.y,
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a.z * b.x - a.x * b.z,
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a.x * b.y - a.y * b.x,
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}
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return result
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Vec3_Normalize :: (a: Vec3): Vec3
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length := Vec3_Length(a)
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result := Vec3{
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a.x / length,
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a.y / length,
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a.z / length,
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}
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return result
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Vec3_Reflect :: (a: Vec3, normal: Vec3): Vec3
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an := Vec3_Dot(a, normal)*2
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result := Vec3_Sub(a, Vec3_MulF32(a, an))
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return result
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Vec3_ConvertToARGB :: (a: Vec3): U32
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a.x = F32_Clamp(0, a.x, 1)
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a.y = F32_Clamp(0, a.y, 1)
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a.z = F32_Clamp(0, a.z, 1)
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r := (a.x * 255)->U32 << 16
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g := (a.y * 255)->U32 << 8
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b := (a.z * 255)->U32 << 0
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result := r | g | b
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return result
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Vec3_Length :: (a: Vec3): F32 ;; return sqrtf(a.x*a.x + a.y*a.y + a.z*a.z)
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Vec3_Negate :: (a: Vec3): Vec3 ;; return Vec3{-a.x, -a.y, -a.z}
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Vec3_Dot :: (a: Vec3, b: Vec3): F32 ;; return a.x*b.x + a.y*b.y + a.z*b.z
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Vec3_Mul :: (a: Vec3, b: Vec3): Vec3 ;; return Vec3{a.x*b.x, a.y*b.y, a.z*b.z}
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Vec3_MulF32 :: (a: Vec3, b: F32) : Vec3 ;; return Vec3{a.x*b, a.y*b, a.z*b}
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Vec3_Add :: (a: Vec3, b: Vec3): Vec3 ;; return Vec3{a.x+b.x, a.y+b.y, a.z+b.z}
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Vec3_Div :: (a: Vec3, b: Vec3): Vec3 ;; return Vec3{a.x/b.x, a.y/b.y, a.z/b.z}
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Vec3_Sub :: (a: Vec3, b: Vec3): Vec3 ;; return Vec3{a.x-b.x, a.y-b.y, a.z-b.z}
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F32_Clamp :: (min: F32, value: F32, max: F32): F32
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if value > max;; return max
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if value < min;; return min
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return value
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F32_ClampBottom :: (min: F32, value: F32): F32
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if value < min;; return min
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return value
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F32_Absolute :: (val: F32): F32
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if val < 0;; return -val
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return val
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