func (g *Geometry) buildScale() func(float64, float64, float64) *Geometry {
// scale geometry
var m1 math3d.Matrix4
return func(x, y, z float64) *Geometry {
if m1 == nil {
m1 = math3d.NewMatrix4()
}
m1.MakeScale(x, y, z)
g.ApplyMatrix(m1)
return g
}
}
func (g *Geometry) buildRotateY() func(angle float64) *Geometry {
// rotate geometry around world y-axis
var m1 math3d.Matrix4
return func(angle float64) *Geometry {
if m1 == nil {
m1 = math3d.NewMatrix4()
}
m1.MakeRotationY(angle)
g.ApplyMatrix(m1)
return g
}
}
func (g *Geometry) buildTranslate() func(float64, float64, float64) *Geometry {
// translate geometry
var m1 math3d.Matrix4
return func(x, y, z float64) *Geometry {
if m1 == nil {
m1 = math3d.NewMatrix4()
}
m1.MakeTranslation(x, y, z)
g.ApplyMatrix(m1)
return g
}
}