36 lines
975 B
Go
36 lines
975 B
Go
package main
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import (
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"log"
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"github.com/deadsy/sdfx/sdf"
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v2 "github.com/deadsy/sdfx/vec/v2"
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)
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func loggedMovement(input sdf.SDF2, displacement sdf.V2, label string) sdf.SDF2 {
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output := sdf.Transform2D(input, sdf.Translate2d(displacement))
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log.Printf("Moving %v by X: %v, Y: %v\n", label, displacement.X, displacement.Y)
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return output
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}
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// trapezoid creates a trapezoid from a vector, base is a v2.Vector, xChange modifies the top half.
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// positive xChange values make the top half larger, negative xChange values make the top half smaller.
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func trapezoid(base v2.Vec, xChange float64) sdf.SDF2 {
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dimensions := v2.VecSet{
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v2.Vec{X: 0, Y: 0},
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v2.Vec{X: -xChange, Y: base.Y},
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v2.Vec{X: base.X + xChange, Y: base.Y},
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v2.Vec{X: base.X, Y: 0},
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}
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trapezoid, err := sdf.Polygon2D(dimensions)
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if err != nil {
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log.Printf("error: %v\nReturning unmodified base.\n", err)
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return sdf.Box2D(base, 0)
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}
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trapezoid = sdf.Center2D(trapezoid)
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return trapezoid
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}
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