package main import ( "log" "github.com/deadsy/sdfx/sdf" v2 "github.com/deadsy/sdfx/vec/v2" ) func loggedMovement(input sdf.SDF2, displacement sdf.V2, label string) sdf.SDF2 { output := sdf.Transform2D(input, sdf.Translate2d(displacement)) log.Printf("Moving %v by X: %v, Y: %v\n", label, displacement.X, displacement.Y) return output } func splitPlane() map[string]sdf.SDF2 { planes := make(map[string]sdf.SDF2) original := topPlane() x, y := original.BoundingBox().Max.X*2, original.BoundingBox().Max.Y*2 cutout := sdf.Box2D(sdf.V2{X: x, Y: y}, 0) cOLeft := sdf.Transform2D(cutout, sdf.Translate2d(sdf.V2{X: x / 2, Y: 0})) cORight := sdf.Transform2D(cutout, sdf.Translate2d(sdf.V2{X: -x / 2, Y: 0})) planes["left"] = sdf.Difference2D(original, cOLeft) planes["right"] = sdf.Difference2D(original, cORight) return planes } // trapezoid creates a trapezoid from a vector, base is a v2.Vector, xChange modifies the top half. // positive xChange values make the top half larger, negative xChange values make the top half smaller. func trapezoid(base v2.Vec, xChange float64) sdf.SDF2 { dimensions := v2.VecSet{ v2.Vec{X: 0, Y: 0}, v2.Vec{X: -xChange, Y: base.Y}, v2.Vec{X: base.X + xChange, Y: base.Y}, v2.Vec{X: base.X, Y: 0}, v2.Vec{X: 0, Y: 0}, } trapezoid, err := sdf.Polygon2D(dimensions) if err != nil { log.Printf("error: %v\nReturning unmodified base.\n", err) return sdf.Box2D(base, 0) } trapezoid = sdf.Center2D(trapezoid) return trapezoid }