d3df5eca0b
Also fix String methods' receivers to be T, not *T, so that
var m f32.Mat32
s := fmt.Sprintf("m=%v", m)
works.
LGTM=crawshaw
R=crawshaw
CC=golang-codereviews
https://golang.org/cl/147490043
48 lines
926 B
Go
48 lines
926 B
Go
// Copyright 2014 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package f32
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import "fmt"
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type Vec4 [4]float32
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func (v Vec4) String() string {
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return fmt.Sprintf("Vec4[% 0.3f, % 0.3f, % 0.3f, % 0.3f]", v[0], v[1], v[2], v[3])
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}
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func (v *Vec4) Normalize() {
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sq := v.Dot(v)
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inv := 1 / Sqrt(sq)
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v[0] *= inv
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v[1] *= inv
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v[2] *= inv
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v[3] *= inv
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}
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func (v *Vec4) Sub(v0, v1 *Vec4) {
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v[0] = v0[0] - v1[0]
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v[1] = v0[1] - v1[1]
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v[2] = v0[2] - v1[2]
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v[3] = v0[3] - v1[3]
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}
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func (v *Vec4) Add(v0, v1 *Vec4) {
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v[0] = v0[0] + v1[0]
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v[1] = v0[1] + v1[1]
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v[2] = v0[2] + v1[2]
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v[3] = v0[3] + v1[3]
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}
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func (v *Vec4) Mul(v0, v1 *Vec4) {
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v[0] = v0[0] * v1[0]
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v[1] = v0[1] * v1[1]
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v[2] = v0[2] * v1[2]
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v[3] = v0[3] * v1[3]
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}
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func (v *Vec4) Dot(v1 *Vec4) float32 {
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return v[0]*v1[0] + v[1]*v1[1] + v[2]*v1[2] + v[3]*v1[3]
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}
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