rotating flip flags

Sources/Voxelotl/Math/Extent.swift

@@ -1,6 +1,15 @@
+import Foundation
+
 public struct Extent<T: AdditiveArithmetic & Hashable>: Hashable {
   public var left: T, top: T, right: T, bottom: T
 
+  public init(left: T, top: T, right: T, bottom: T) {
+    self.left   = left
+    self.top    = top
+    self.right  = right
+    self.bottom = bottom
+  }
+
   @inline(__always) public var topLeft: Point<T> { .init(left, top) }
   @inline(__always) public var topRight: Point<T> { .init(right, top) }
   @inline(__always) public var bottomLeft: Point<T> { .init(left, bottom) }
@@ -24,6 +33,14 @@ public extension Extent where T: SIMDScalar {
     self.right  = to.x
     self.bottom = to.y
   }
+
+  @inline(__always) static func + (lhs: Self, rhs: SIMD2<T>) -> Self {
+    .init(
+      left:   lhs.left + rhs.x,
+      top:    lhs.top + rhs.y,
+      right:  lhs.right + rhs.x,
+      bottom: lhs.bottom + rhs.y)
+  }
 }
 
 public extension Extent where T: AdditiveArithmetic {
@@ -44,3 +61,52 @@ public extension Extent where T: Numeric {
       bottom: lhs.bottom * rhs.h)
   }
 }
+
+public extension Extent where T: BinaryInteger {
+  init<O: BinaryInteger>(_ other: Extent<O>) {
+    self.left   = T(other.left)
+    self.top    = T(other.top)
+    self.right  = T(other.right)
+    self.bottom = T(other.bottom)
+  }
+  init<O: BinaryFloatingPoint>(_ other: Extent<O>) {
+    self.left   = T(other.left)
+    self.top    = T(other.top)
+    self.right  = T(other.right)
+    self.bottom = T(other.bottom)
+  }
+}
+
+public extension Extent where T: FloatingPoint {
+  init<O: BinaryInteger>(_ other: Extent<O>) {
+    self.left   = T(other.left)
+    self.top    = T(other.top)
+    self.right  = T(other.right)
+    self.bottom = T(other.bottom)
+  }
+
+  @inline(__always) static func / (lhs: Self, rhs: T) -> Self {
+    .init(
+      left:   lhs.left / rhs,
+      top:    lhs.top / rhs,
+      right:  lhs.right / rhs,
+      bottom: lhs.bottom / rhs)
+  }
+}
+
+public extension Extent where T: BinaryFloatingPoint {
+  init<O: BinaryFloatingPoint>(_ other: Extent<O>) {
+    self.left   = T(other.left)
+    self.top    = T(other.top)
+    self.right  = T(other.right)
+    self.bottom = T(other.bottom)
+  }
+}
+
+@inlinable public func floor<T: FloatingPoint>(_ extent: Extent<T>) -> Extent<T> {
+  .init(
+    left:   floor(extent.left),
+    top:    floor(extent.top),
+    right:  floor(extent.right),
+    bottom: floor(extent.bottom))
+}

Sources/Voxelotl/Renderer/Sprite.swift

@@ -6,8 +6,8 @@ public struct Sprite {
     }
 
     public static let none: Self = Self(rawValue: 0)
-    public static let x: Self    = Self(rawValue: 1 << 0)
+    public static let horz: Self = Self(rawValue: 1 << 0)
-    public static let y: Self    = Self(rawValue: 1 << 1)
+    public static let vert: Self = Self(rawValue: 1 << 1)
     public static let diag: Self = Self(rawValue: 1 << 2)
   }
 
@@ -21,3 +21,15 @@ public struct Sprite {
   var flip: Flip
   var color: Color<Float>
 }
+
+public extension Sprite.Flip {
+  var clockwise: Self {
+    [Self](arrayLiteral: [ .vert, .diag ], [ .horz, .vert, .diag ], .diag,
+      [ .horz, .diag ], .horz, .none, [ .horz, .vert ], .vert)[Int(self.rawValue)]
+  }
+
+  var counterClockwise: Self {
+    [Self](arrayLiteral: [ .horz, .diag ], .diag, [ .horz, .vert, .diag ],
+      [ .vert, .diag ], .vert, [ .horz, .vert ], .none, .horz)[Int(self.rawValue)]
+  }
+}

Sources/Voxelotl/Renderer/SpriteBatch.swift

@@ -64,7 +64,7 @@ public struct SpriteBatch {
       let bias = origin / SIMD2(size)
       self.drawQuad(texture, .positions(position, size * scale, angle, bias), texCoord, color: color)
     } else {
-      self.drawQuad(texture, .positions(position - origin, size * scale), texCoord, color: color)
+      self.drawQuad(texture, .positions(position - origin * scale, size * scale), texCoord, color: color)
     }
   }
 
@@ -83,7 +83,7 @@ public struct SpriteBatch {
       let bias = SIMD2(origin) / SIMD2(size)
       self.drawQuad(texture, .positions(position, size * scale, angle, bias), texCoord, color: color)
     } else {
-      self.drawQuad(texture, .positions(position, size * scale), texCoord, color: color)
+      self.drawQuad(texture, .positions(position - origin * scale, size * scale), texCoord, color: color)
     }
   }
 
@@ -345,12 +345,11 @@ fileprivate extension SpriteBatch.Quad {
     v10: SIMD2<Float>(0, 0), v11: SIMD2<Float>(1, 0))
 
   static func texcoords(_ flip: Sprite.Flip) -> Self {
-    let flipX = flip.contains(.x), flipY = flip.contains(.y)
+    let flipX = flip.contains(.horz), flipY = flip.contains(.vert), flipD = flip.contains(.diag)
-    //TODO: diag
     return .init(
       v00: .init(flipX ? 1 : 0, flipY ? 0 : 1),
-      v01: .init(flipX ? 0 : 1, flipY ? 0 : 1),
+      v01: flipD ? .init(flipX ? 1 : 0, flipY ? 1 : 0) : .init(flipX ? 0 : 1, flipY ? 0 : 1),
-      v10: .init(flipX ? 1 : 0, flipY ? 1 : 0),
+      v10: flipD ? .init(flipX ? 0 : 1, flipY ? 0 : 1) : .init(flipX ? 1 : 0, flipY ? 1 : 0),
       v11: .init(flipX ? 0 : 1, flipY ? 1 : 0))
   }
 
@@ -363,14 +362,17 @@ fileprivate extension SpriteBatch.Quad {
   }
 
   static func texcoords(_ texSize: Size<Int>, _ source: Rect<Float>, _ flip: Sprite.Flip) -> Self {
-    let flipX = flip.contains(.x), flipY = flip.contains(.y)
+    let flipX = flip.contains(.horz), flipY = flip.contains(.vert), flipD = flip.contains(.diag)
     let invSize = 1 / Size<Float>(texSize)
     let st = Extent(source) * invSize
-    //TODO: diag
     return .init(
       v00: .init(flipX ? st.right : st.left, flipY ? st.bottom : st.top),
-      v01: .init(flipX ? st.left : st.right, flipY ? st.bottom : st.top),
+      v01: flipD
-      v10: .init(flipX ? st.right : st.left, flipY ? st.top : st.bottom),
+        ?  .init(flipX ? st.right : st.left, flipY ? st.top : st.bottom)
+        :  .init(flipX ? st.left : st.right, flipY ? st.bottom : st.top),
+      v10: flipD
+        ?  .init(flipX ? st.left : st.right, flipY ? st.bottom : st.top)
+        :  .init(flipX ? st.right : st.left, flipY ? st.top : st.bottom),
       v11: .init(flipX ? st.left : st.right, flipY ? st.top : st.bottom))
   }
 }

Sources/Voxelotl/SpriteTestGame.swift

@@ -6,18 +6,7 @@ internal class SpriteTestGame: GameDelegate {
   private var player = TestPlayer(position: .one * 10)
   private var texture: RendererTexture2D!
   private var wireShark: RendererTexture2D!
-
+  private var level = TestLevel()
-  private static let levelWidth = 40, levelHeight = 23
-  private var level: [UInt8]
-
-  init() {
-    self.level = .init(repeating: 0, count: Self.levelWidth * Self.levelHeight)
-    for i in 0..<Self.levelWidth { self.level[i + (Self.levelHeight - 1) * Self.levelWidth] = 1 }
-    for i in 0..<Self.levelWidth { self.level[i + (Self.levelHeight - 2) * Self.levelWidth] = 1 }
-    for i in 17...20 { self.level[10 + (i) * Self.levelWidth] = 1 }
-    for i in 17...20 { self.level[14 + (i) * Self.levelWidth] = 1 }
-    for i in 11...13 { self.level[i + (17) * Self.levelWidth] = 1 }
-  }
 
   func create(_ renderer: Renderer) {
     self.spriteBatch = renderer.createSpriteBatch()
@@ -29,10 +18,38 @@ internal class SpriteTestGame: GameDelegate {
   }
 
   func update(_ time: GameTime) {
+    let dt = Float(time.delta)
+
+    self.player.velocity.x = 0
     if let pad = GameController.current?.state {
-      self.player.position += pad.leftStick.radialDeadzone(min: 0.1, max: 1) * 1000 * Float(time.delta)
+      self.player.velocity.x = pad.leftStick.x.axisDeadzone(0.1, 0.8) * 660
+      if pad.pressed(.start) {
+        self.player.position = .one * 10
+      }
+      if pad.pressed(.east) && player.onGround {
+        self.player.velocity.y = -1000
+      } else if pad.released(.east) && self.player.velocity.y < -550 {
+        self.player.velocity.y = -550
+      }
     }
-    self.player.rotate += Float(time.delta)
+    if Keyboard.down(.left) {
+      self.player.velocity.x = -660
+    } else if Keyboard.down(.right) {
+      self.player.velocity.x = 660
+    }
+    if Keyboard.pressed(.up) && player.onGround {
+      self.player.velocity.y = -1000
+    } else if Keyboard.released(.up) && self.player.velocity.y < -550 {
+      self.player.velocity.y = -550
+    }
+
+    if Mouse.down(.left) {
+      self.level.set(SIMD2(Mouse.position / TestLevel.cellScale, rounding: .down), true)
+    } else if Mouse.down(.right) {
+      self.level.set(SIMD2(Mouse.position / TestLevel.cellScale, rounding: .down), false)
+    }
+
+    self.player.update(deltaTime: dt, level: self.level)
   }
 
   func draw(_ renderer: Renderer, _ time: GameTime) {
@@ -41,27 +58,28 @@ internal class SpriteTestGame: GameDelegate {
     // Draw background
     self.spriteBatch.draw(self.texture,
       source: .init(
-        origin: .init(scalar: fmod(player.rotate, 32)),
+        origin: .init(scalar: fmod(Float(time.total), 32)),
         size:   (spriteBatch.viewport?.size ?? Size<Float>(renderer.frame.size)) * 0.01),
       destination: nil,
-      angle: sin(player.rotate) * .pi * 0.1, center: nil,
       color: .init(renderer.clearColor).setAlpha(0.7))
 
     // Draw level
     let scale: Float = 64
-    for y in 0..<Self.levelHeight {
+    for y in 0..<TestLevel.levelHeight {
-      for x in 0..<Self.levelWidth {
+      for x in 0..<TestLevel.levelWidth {
-        if level[x + Self.levelWidth * y] == 1 {
+        if self.level.get(.init(x, y)) {
           self.spriteBatch.draw(self.texture, destination: .init(origin: Point(Point(x, y)) * scale, size: .init(scalar: scale)))
         }
       }
     }
 
-    // Draw wireshark (controllable)
+    // Draw wireshark
+    var shorkFlip: Sprite.Flip = fmod(self.player.rotate, 0.25) < 0.125 ? .none : .horz
+    if self.player.velocity.y > 0 {
+      shorkFlip = self.player.velocity.x < 0 ? shorkFlip.counterClockwise : shorkFlip.clockwise
+    }
     self.spriteBatch.draw(self.wireShark,
-      position: player.position,
+      position: self.player.position, scale: 0.2, origin: .init(250, 275 * 2), flip: shorkFlip)
-      scale: .init(sin(player.rotate * 5), cos(player.rotate * 3)),
-      angle: player.rotate, origin: .init(250, 275))
 
     // Sliding door test
     let doorAngle = max(sin(player.rotate * 2.6) - 0.75, 0) * .pi
@@ -78,7 +96,7 @@ internal class SpriteTestGame: GameDelegate {
       mpos /= SIMD2(Size<Float>(renderer.frame.size))
       mpos *= SIMD2(self.spriteBatch.viewport!.size)
     }
-    let inter = 0.5 + sin(player.rotate * 10) * 0.5
+    let inter = 0.5 + sin(Float(time.total) * 10) * 0.5
     let color = Color<Float>.green.mix(.white, 0.3)
     let mesh = Mesh<VertexPosition2DTexcoordColor, UInt16>.init(vertices: [
       .init(position: mpos, texCoord: .zero, color: .one),
@@ -91,13 +109,95 @@ internal class SpriteTestGame: GameDelegate {
     } else {
       self.spriteBatch.draw(self.texture, vertices: mesh.vertices[..<3])
     }
+
     self.spriteBatch.end()
   }
 }
 
+fileprivate struct TestLevel {
+  public static let levelWidth = 40, levelHeight = 23
+  public static let cellScale: Float = 64
+
+  private var data: [UInt8]
+
+  init() {
+    self.data = .init(repeating: 0, count: Self.levelWidth * Self.levelHeight)
+    for i in 0..<Self.levelWidth { self.data[i + (Self.levelHeight - 1) * Self.levelWidth] = 1 }
+    for i in 0..<Self.levelWidth { self.data[i + (Self.levelHeight - 2) * Self.levelWidth] = 1 }
+    for i in 17...20 { self.data[10 + i * Self.levelWidth] = 1 }
+    for i in 17...20 { self.data[14 + i * Self.levelWidth] = 1 }
+    for i in 11...13 { self.data[i + 17 * Self.levelWidth] = 1 }
+  }
+
+  mutating func set(_ p: SIMD2<Int>, _ to: Bool) {
+    if p.x >= 0 && p.y >= 0 && p.x < Self.levelWidth && p.y < Self.levelHeight {
+      self.data[p.x + Self.levelWidth * p.y] = to ? 1 : 0
+    }
+  }
+
+  func get(_ p: Point<Int>) -> Bool {
+    if p.x < 0 || p.y < 0 || p.x >= Self.levelWidth || p.y >= Self.levelHeight {
+      return false
+    }
+    return self.data[p.x + Self.levelWidth * p.y] == 1
+  }
+
+  func check(_ p: SIMD2<Float>) -> Bool {
+    let p = SIMD2<Int>(p / TestLevel.cellScale, rounding: .down)
+    return self.get(Point<Int>(p.x, p.y))
+  }
+
+  func check(_ rect: Extent<Float>) -> Bool {
+    let p = Extent<Int>(floor(rect / Self.cellScale))
+    return self.get(p.topLeft) || self.get(p.topRight) || self.get(p.bottomLeft) || self.get(p.bottomRight)
+  }
+}
+
 fileprivate struct TestPlayer {
+  static private let rect = Extent<Float>(left: -30, top: -63, right: 30, bottom: 0)
+
   var position: SIMD2<Float>
+  var velocity: SIMD2<Float> = .zero
   var rotate: Float = 0
+
+  private var _onGround = false
+  var onGround: Bool { self._onGround }
+
+  init(position: SIMD2<Float>) {
+    self.position = position
+  }
+
+  mutating func update(deltaTime dt: Float, level: TestLevel) {
+    self.velocity.y += 1500 * dt
+    if abs(self.velocity.y) > 3000 {
+      self.velocity.y = .init(signOf: self.velocity.y, magnitudeOf: 3000)
+    }
+
+    if self.velocity.x != 0 {
+      self.position.x += self.velocity.x * dt
+      if level.check(Self.rect + self.position) {
+        let offset = self.velocity.x < 0 ? Self.rect.left : Self.rect.right
+        self.position.x = round((self.position.x + offset) / TestLevel.cellScale) * TestLevel.cellScale - offset
+        self.position.x -= .init(signOf: self.velocity.x, magnitudeOf: .ulpOfOne * 12000);
+        self.velocity.x = 0
+      }
+    }
+    if self.velocity.y != 0 {
+      self.position.y += self.velocity.y * dt
+      if level.check(Self.rect + (self.position)) {
+        let offset = self.velocity.y < 0 ? Self.rect.top : Self.rect.bottom
+        self.position.y = round((self.position.y + offset) / TestLevel.cellScale) * TestLevel.cellScale - offset
+        self.position.y -= .init(signOf: self.velocity.y, magnitudeOf: .ulpOfOne * 12000);
+        self.velocity.y = 0
+      }
+    }
+
+    if self.velocity.x != 0 {
+      self.rotate += abs(self.velocity.x) / 1000 * dt
+    }
+
+    self._onGround = level.check(Self.rect + self.position + .init(0, .ulpOfOne * 24000))
+  }
 }
 
 fileprivate extension Color {