57 lines
1.1 KiB
Go
57 lines
1.1 KiB
Go
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package vec4
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import (
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"zworld/plugin/math"
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"zworld/plugin/math/random"
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"zworld/plugin/math/vec2"
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"zworld/plugin/math/vec3"
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)
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// New returns a new vec4 from its components
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func New(x, y, z, w float32) T {
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return T{x, y, z, w}
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}
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// Extend a vec3 to a vec4 by adding a W component
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func Extend(v vec3.T, w float32) T {
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return T{v.X, v.Y, v.Z, w}
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}
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// Extend2 a vec2 to a vec4 by adding the Z and W components
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func Extend2(v vec2.T, z, w float32) T {
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return T{v.X, v.Y, z, w}
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}
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// Dot returns the dot product of two vectors.
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func Dot(a, b T) float32 {
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return a.X*b.X + a.Y*b.Y + a.Z*b.Z + a.W*b.W
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}
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// Random vector, not normalized.
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func Random(min, max T) T {
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return T{
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random.Range(min.X, max.X),
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random.Range(min.Y, max.Y),
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random.Range(min.Z, max.Z),
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random.Range(min.W, max.W),
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}
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}
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func Min(a, b T) T {
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return T{
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X: math.Min(a.X, b.X),
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Y: math.Min(a.Y, b.Y),
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Z: math.Min(a.Z, b.Z),
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W: math.Min(a.W, b.W),
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}
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}
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func Max(a, b T) T {
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return T{
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X: math.Max(a.X, b.X),
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Y: math.Max(a.Y, b.Y),
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Z: math.Max(a.Z, b.Z),
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W: math.Max(a.W, b.W),
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}
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}
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