|
| 1 | +package main |
| 2 | + |
| 3 | +import ( |
| 4 | + "flag" |
| 5 | + "github.com/aldernero/gaul" |
| 6 | + "github.com/tdewolff/canvas" |
| 7 | + "log" |
| 8 | + "math" |
| 9 | + "os" |
| 10 | + "runtime/pprof" |
| 11 | + |
| 12 | + "github.com/aldernero/sketchy" |
| 13 | + "github.com/hajimehoshi/ebiten/v2" |
| 14 | +) |
| 15 | + |
| 16 | +var triangles []gaul.Triangle |
| 17 | +var curves1 []gaul.Curve |
| 18 | +var curves2 []gaul.Curve |
| 19 | +var curves3 []gaul.Curve |
| 20 | +var presses int |
| 21 | +var rng gaul.LFSRLarge |
| 22 | + |
| 23 | +func genCurves(num int, triangle gaul.Triangle) ([]gaul.Curve, []gaul.Curve, []gaul.Curve) { |
| 24 | + AB := gaul.Line{P: triangle.A, Q: triangle.B} |
| 25 | + BC := gaul.Line{P: triangle.B, Q: triangle.C} |
| 26 | + CA := gaul.Line{P: triangle.C, Q: triangle.A} |
| 27 | + c1 := make([]gaul.Curve, num) |
| 28 | + c2 := make([]gaul.Curve, num) |
| 29 | + c3 := make([]gaul.Curve, num) |
| 30 | + for i := 0; i < num; i++ { |
| 31 | + p := rng.Float64() |
| 32 | + q := rng.Float64() |
| 33 | + side1 := rng.Uint64n(3) |
| 34 | + side2 := rng.Float64() |
| 35 | + switch side1 { |
| 36 | + case 0: // AB |
| 37 | + if side2 < 0.5 { // BC |
| 38 | + P := AB.Lerp(p) |
| 39 | + Q := BC.Lerp(q) |
| 40 | + c1[i] = gaul.QuadBezier(P, Q, triangle.B) |
| 41 | + c2[i] = gaul.CubicBezier(P, Q, triangle.A, triangle.C) |
| 42 | + c3[i] = gaul.QuarticBezier(P, Q, triangle.B, triangle.A, triangle.C) |
| 43 | + } else { // CA |
| 44 | + P := AB.Lerp(p) |
| 45 | + Q := CA.Lerp(q) |
| 46 | + c1[i] = gaul.QuadBezier(P, Q, triangle.A) |
| 47 | + c2[i] = gaul.CubicBezier(P, Q, triangle.B, triangle.C) |
| 48 | + c3[i] = gaul.QuarticBezier(P, Q, triangle.A, triangle.B, triangle.C) |
| 49 | + } |
| 50 | + case 1: // BC |
| 51 | + if side2 < 0.5 { // CA |
| 52 | + P := BC.Lerp(p) |
| 53 | + Q := CA.Lerp(q) |
| 54 | + c1[i] = gaul.QuadBezier(P, Q, triangle.C) |
| 55 | + c2[i] = gaul.CubicBezier(P, Q, triangle.B, triangle.A) |
| 56 | + c3[i] = gaul.QuarticBezier(P, Q, triangle.C, triangle.B, triangle.A) |
| 57 | + } else { // AB |
| 58 | + P := BC.Lerp(p) |
| 59 | + Q := AB.Lerp(q) |
| 60 | + c1[i] = gaul.QuadBezier(P, Q, triangle.B) |
| 61 | + c2[i] = gaul.CubicBezier(P, Q, triangle.C, triangle.A) |
| 62 | + c3[i] = gaul.QuarticBezier(P, Q, triangle.B, triangle.C, triangle.A) |
| 63 | + } |
| 64 | + case 2: // CA |
| 65 | + if side2 < 0.5 { // AB |
| 66 | + P := CA.Lerp(p) |
| 67 | + Q := AB.Lerp(q) |
| 68 | + c1[i] = gaul.QuadBezier(P, Q, triangle.A) |
| 69 | + c2[i] = gaul.CubicBezier(P, Q, triangle.C, triangle.B) |
| 70 | + c3[i] = gaul.QuarticBezier(P, Q, triangle.A, triangle.C, triangle.B) |
| 71 | + } else { // BC |
| 72 | + P := CA.Lerp(p) |
| 73 | + Q := BC.Lerp(q) |
| 74 | + c1[i] = gaul.QuadBezier(P, Q, triangle.C) |
| 75 | + c2[i] = gaul.CubicBezier(P, Q, triangle.A, triangle.B) |
| 76 | + c3[i] = gaul.QuarticBezier(P, Q, triangle.C, triangle.A, triangle.B) |
| 77 | + |
| 78 | + } |
| 79 | + } |
| 80 | + } |
| 81 | + return c1, c2, c3 |
| 82 | +} |
| 83 | + |
| 84 | +func setup(s *sketchy.Sketch) { |
| 85 | + // Setup logic goes here |
| 86 | + num := int(s.Slider("num")) |
| 87 | + radius := s.Slider("radius") |
| 88 | + W := s.Width() |
| 89 | + H := s.Height() |
| 90 | + xoffset := s.Slider("xoffset") * W |
| 91 | + yoffset := s.Slider("yoffset") * H |
| 92 | + R := radius * W |
| 93 | + rng = gaul.NewLFSRLargeWithSeed(uint64(s.RandomSeed)) |
| 94 | + curves1 = []gaul.Curve{} |
| 95 | + curves2 = []gaul.Curve{} |
| 96 | + curves3 = []gaul.Curve{} |
| 97 | + angle1 := gaul.Pi / 2 |
| 98 | + angle2 := -gaul.Pi / 2 |
| 99 | + triangle2 := gaul.Triangle{ |
| 100 | + A: gaul.Point{ |
| 101 | + X: W/2 + R*math.Cos(angle2-gaul.Tau/3), |
| 102 | + Y: yoffset + R*math.Sin(angle2-gaul.Tau/3), |
| 103 | + }, |
| 104 | + B: gaul.Point{ |
| 105 | + X: W/2 + R*math.Cos(angle2), |
| 106 | + Y: yoffset + R*math.Sin(angle2), |
| 107 | + }, |
| 108 | + C: gaul.Point{ |
| 109 | + X: W/2 + R*math.Cos(angle2+gaul.Tau/3), |
| 110 | + Y: yoffset + R*math.Sin(angle2+gaul.Tau/3), |
| 111 | + }, |
| 112 | + } |
| 113 | + triangle1 := gaul.Triangle{ |
| 114 | + A: gaul.Point{ |
| 115 | + X: W/2 - xoffset + R*math.Cos(angle1-gaul.Tau/3), |
| 116 | + Y: yoffset + R*math.Sin(angle1-gaul.Tau/3), |
| 117 | + }, |
| 118 | + B: gaul.Point{ |
| 119 | + X: W/2 - xoffset + R*math.Cos(angle1), |
| 120 | + Y: yoffset + R*math.Sin(angle1), |
| 121 | + }, |
| 122 | + C: gaul.Point{ |
| 123 | + X: W/2 - xoffset + R*math.Cos(angle1+gaul.Tau/3), |
| 124 | + Y: yoffset + R*math.Sin(angle1+gaul.Tau/3), |
| 125 | + }, |
| 126 | + } |
| 127 | + triangle3 := gaul.Triangle{ |
| 128 | + A: gaul.Point{ |
| 129 | + X: W/2 + xoffset + R*math.Cos(angle1-gaul.Tau/3), |
| 130 | + Y: yoffset + R*math.Sin(angle1-gaul.Tau/3), |
| 131 | + }, |
| 132 | + B: gaul.Point{ |
| 133 | + X: W/2 + xoffset + R*math.Cos(angle1), |
| 134 | + Y: yoffset + R*math.Sin(angle1), |
| 135 | + }, |
| 136 | + C: gaul.Point{ |
| 137 | + X: W/2 + xoffset + R*math.Cos(angle1+gaul.Tau/3), |
| 138 | + Y: yoffset + R*math.Sin(angle1+gaul.Tau/3), |
| 139 | + }, |
| 140 | + } |
| 141 | + triangles = []gaul.Triangle{triangle1, triangle2, triangle3} |
| 142 | + curves1, _, _ = genCurves(num, triangle1) |
| 143 | + _, curves2, _ = genCurves(num, triangle2) |
| 144 | + _, _, curves3 = genCurves(num, triangle3) |
| 145 | +} |
| 146 | + |
| 147 | +func update(s *sketchy.Sketch) { |
| 148 | + // Update logic goes here |
| 149 | + if s.Toggle("next") { |
| 150 | + presses++ |
| 151 | + return |
| 152 | + } |
| 153 | + if s.DidControlsChange { |
| 154 | + setup(s) |
| 155 | + } |
| 156 | +} |
| 157 | + |
| 158 | +func draw(s *sketchy.Sketch, c *canvas.Context) { |
| 159 | + // Drawing code goes here |
| 160 | + c.SetFillColor(canvas.Transparent) |
| 161 | + c.SetStrokeColor(canvas.White) |
| 162 | + c.SetStrokeWidth(0.25) |
| 163 | + if s.Toggle("show triangles") { |
| 164 | + for _, triangle := range triangles { |
| 165 | + triangle.Draw(c) |
| 166 | + } |
| 167 | + } |
| 168 | + for _, curve := range curves1 { |
| 169 | + curve.Draw(c) |
| 170 | + } |
| 171 | + |
| 172 | + for _, curve := range curves2 { |
| 173 | + curve.Draw(c) |
| 174 | + } |
| 175 | + for _, curve := range curves3 { |
| 176 | + curve.Draw(c) |
| 177 | + } |
| 178 | +} |
| 179 | + |
| 180 | +func main() { |
| 181 | + var configFile string |
| 182 | + var prefix string |
| 183 | + var randomSeed int64 |
| 184 | + var cpuprofile = flag.String("pprof", "", "Collect CPU profile") |
| 185 | + flag.StringVar(&configFile, "c", "sketch.json", "Sketch config file") |
| 186 | + flag.StringVar(&prefix, "p", "", "Output file prefix") |
| 187 | + flag.Int64Var(&randomSeed, "s", 0, "Random number generator seed") |
| 188 | + flag.Parse() |
| 189 | + if *cpuprofile != "" { |
| 190 | + f, err := os.Create(*cpuprofile) |
| 191 | + if err != nil { |
| 192 | + log.Fatal(err) |
| 193 | + } |
| 194 | + pprof.StartCPUProfile(f) |
| 195 | + defer pprof.StopCPUProfile() |
| 196 | + } |
| 197 | + s, err := sketchy.NewSketchFromFile(configFile) |
| 198 | + if err != nil { |
| 199 | + log.Fatal(err) |
| 200 | + } |
| 201 | + if prefix != "" { |
| 202 | + s.Prefix = prefix |
| 203 | + } |
| 204 | + s.RandomSeed = randomSeed |
| 205 | + s.Updater = update |
| 206 | + s.Drawer = draw |
| 207 | + s.Init() |
| 208 | + setup(s) |
| 209 | + ebiten.SetWindowSize(int(s.ControlWidth+s.SketchWidth), int(s.SketchHeight)) |
| 210 | + ebiten.SetWindowTitle("Sketchy - " + s.Title) |
| 211 | + ebiten.SetWindowResizingMode(ebiten.WindowResizingModeDisabled) |
| 212 | + ebiten.SetVsyncEnabled(true) |
| 213 | + ebiten.SetTPS(ebiten.SyncWithFPS) |
| 214 | + if err := ebiten.RunGame(s); err != nil { |
| 215 | + log.Fatal(err) |
| 216 | + } |
| 217 | +} |
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