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bloeys
2022-10-01 00:15:51 +04:00
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README.md
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@ -11,9 +11,9 @@ gglm currently has the following:
- Many useful geometric functions (e.g. dot product, cross product, vector reflection etc) - Many useful geometric functions (e.g. dot product, cross product, vector reflection etc)
- 32-bit scalar operations (e.g. sin32, cos32, equality using epsilon, sqrt32 etc) - 32-bit scalar operations (e.g. sin32, cos32, equality using epsilon, sqrt32 etc)
- Useful 32-bit constants (e.g. pi, Deg2Rad, Rad2Deg, float32 epsilon etc) - Useful 32-bit constants (e.g. pi, Deg2Rad, Rad2Deg, float32 epsilon etc)
- Simple 'siwzzle' interfaces that allow you to do things like `.X()` or `.R()` etc. - Simple 'swizzle' interfaces that allow you to do things like `.X()` or `.R()` etc.
- Very easy to use with graphics/native APIs as everything is implemented using arrays - Very easy to use with graphics/native APIs as everything is implemented using arrays
- `.String()` functions on all types for pretty pritning - `.String()` functions on all types for pretty printing
## Installation ## Installation
@ -24,15 +24,7 @@ gglm currently has the following:
```go ```go
import "github.com/bloeys/gglm/gglm" import "github.com/bloeys/gglm/gglm"
func main() { func main() {
//LookAt
camPos := gglm.NewVec3(0, 0, 3)
worldUp := gglm.NewVec3(0, 1, 0)
targetPos := gglm.NewVec3(0, 0, 0)
viewMat := gglm.LookAt(camPos, targetPos, worldUp)
println(viewMat.String())
//Vec2 //Vec2
v1 := &gglm.Vec2{Data: [2]float32{1, 2}} v1 := &gglm.Vec2{Data: [2]float32{1, 2}}
@ -47,6 +39,13 @@ func main() {
//v1 is returned from the function, so we can chain calls that operate on v1 //v1 is returned from the function, so we can chain calls that operate on v1
newX := v1.Add(v2).X() newX := v1.Add(v2).X()
println("newX:", newX) println("newX:", newX)
// LookAt for a right-handed coordinate system
camPos := gglm.NewVec3(0, 0, 3)
worldUp := gglm.NewVec3(0, 1, 0)
targetPos := gglm.NewVec3(0, 0, 0)
viewMat := gglm.LookAtRH(camPos, targetPos, worldUp)
println(viewMat.String())
} }
``` ```