simple player and collisions

src/debug.js

@@ -110,6 +110,15 @@ class Debugging {
     ctx.closePath()
     ctx.stroke()
 
+    // Draw colliders
+    ctx.fillStyle = '#00aaff'
+    let collider = chunk.getLayer('col')
+    for (let i in collider.tiles) {
+      let p = collider.toXY(parseInt(i))
+      if (collider.tiles[i] === 0) continue
+      ctx.fillRect(p.x * chunk.tile, p.y * chunk.tile, chunk.tile, chunk.tile)
+    }
+
     // Chunk index
     ctx.fillStyle = '#fff'
     ctx.fillText(chunk.x + ';' + chunk.y, 5, 16)

src/index.js

@@ -3,6 +3,7 @@ import { canvas, ctx } from './canvas'
 import { TileMap, World } from './tiles'
 import { HeightMap } from './heightmap'
 import Debug from './debug'
+import Player from './player'
 import Input from './input'
 import Viewport from './viewport'
 import RES from './resource'
@@ -12,13 +13,14 @@ let frameTime = 0
 let frameCount = 0
 let fps = 0
 
-let vp = new Viewport(1111, 900)
+let vp = new Viewport(0, 0)
+let p = new Player(800, 1200, 32, 64)
 
 let height = new HeightMap(0, 32, 16, 0)
 let map = new TileMap('assets/ground.png', 32)
 
 const chunkSize = 32
-const tileSize = 12
+const tileSize = 16
 
 // Define dirt tiles
 map.define({
@@ -63,30 +65,8 @@ let world = new World(height, { GROUND: map }, chunkSize, tileSize, 32, 64)
 
 function update (dt) {
   world.update(dt, vp)
-  if (Input.isDown('w')) {
+  p.update(dt, vp, world)
-    vp.y -= 15
+  vp.update(dt, world)
-  } else if (Input.isDown('s')) {
-    vp.y += 15
-  }
-
-  if (Input.isDown('a')) {
-    vp.x -= 15
-  } else if (Input.isDown('d')) {
-    vp.x += 15
-  }
-
-  let full = world.chunkSize * world.tileSize
-  if (vp.x < 0) {
-    vp.x = 0
-  } else if (vp.x + vp.width > world.width * full) {
-    vp.x = (full * world.width) - vp.width
-  }
-
-  if (vp.y < 0) {
-    vp.y = 0
-  } else if (vp.y + vp.height > world.height * full) {
-    vp.y = (full * world.height) - vp.height
-  }
 
   if (Input.mouse['btn0']) {
     let mpin = world.pickMouse(vp, Input.mouse.pos)
@@ -103,6 +83,7 @@ function update (dt) {
 
 function draw () {
   world.draw(vp)
+  p.draw(vp)
   Debug.draw(vp, world, fps)
 }
 

src/input.js

@@ -10,6 +10,7 @@ const specialKeyMap = {
   'pausebreak': 19,
   'capslock': 20,
   'escape': 27,
+  'space': 32,
   'pgup': 33,
   'pgdown': 34,
   'end': 35,

src/player.js

@@ -1,189 +1,69 @@
 import { ctx } from './canvas'
-import { GameObject } from './level'
+import Input from './input'
-import { deg2rad, rad2vec, intersectRect } from './utils'
-import RES from './resource'
 
-const FULL_ROTATION = -85
+class Player {
-const FULL_ROTATION_EDGE = -FULL_ROTATION
+  constructor (x, y, w, h) {
-
-class Hook extends GameObject {
-  constructor (player, x, y, w, h, len) {
-    super(x, y, w, h)
-    this.player = player
-
-    // Return position
-    this.rx = x
-    this.ry = y
-
-    // Hook rotation
-    // Hook rotation direction
-    this.r = 0
-    this.rd = 1
-
-    // Distance from center
-    // Moving direction
-    this.d = 0
-    this.md = -1
-
-    // Travel length
-    this.len = len
-
-    // Attached object
-    this.obj = null
-  }
-
-  draw () {
-    if (this.md !== -1) {
-      // Draw line
-      ctx.beginPath()
-      ctx.moveTo(ctx.oX + this.rx, ctx.oY + this.ry)
-      ctx.lineTo(ctx.oX + this.x, ctx.oY + this.y)
-      ctx.stroke()
-      ctx.closePath()
-    }
-
-    let hookr = deg2rad(360 - this.r)
-    ctx.save()
-    ctx.translate(ctx.oX + this.x, ctx.oY + this.y)
-    ctx.rotate(hookr)
-    ctx.drawImage(RES.loadImage('static/hook_open.png', true), -this.w / 2, -this.h / 2, this.w, this.h)
-    ctx.restore()
-  }
-
-  clear () {
-    this.obj = null
-    this.d = 0
-    this.md = -1
-    this.x = this.rx
-    this.y = this.ry
-  }
-
-  update (level) {
-    if (this.d === 0 && this.r < FULL_ROTATION_EDGE && this.rd === 1) {
-      this.r += 1
-    }
-
-    if (this.d === 0 && this.r > FULL_ROTATION && this.rd === 0) {
-      this.r -= 1
-    }
-
-    if (this.r >= FULL_ROTATION_EDGE && this.rd === 1) {
-      this.r = FULL_ROTATION_EDGE
-      this.rd = 0
-    }
-
-    if (this.r <= FULL_ROTATION && this.rd === 0) {
-      this.r = FULL_ROTATION
-      this.rd = 1
-    }
-
-    if (ctx.mouse.down['btn0'] && this.d === 0 && !this.obj) {
-      this.d = 0
-      this.md = 1
-    }
-
-    if (this.md > -1) {
-      if (this.d > this.len && this.md === 1) {
-        this.md = 0
-      }
-
-      if (this.d <= 2 && this.md === 0) {
-        this.d = 0
-        this.md = -1
-        this.x = this.rx
-        this.y = this.ry
-
-        // Score
-        if (this.obj) {
-          this.player.score(this.obj)
-          this.obj.destroy()
-          this.obj = null
-        }
-        return
-      }
-
-      let dir = rad2vec(deg2rad(90 - this.r))
-      dir.x *= this.d
-      dir.y *= this.d
-
-      this.x = this.rx + dir.x
-      this.y = this.ry + dir.y
-
-      if (this.obj) {
-        this.obj.x = this.x - this.obj.w / 2
-        this.obj.y = this.y
-      }
-
-      // Detect intersection
-      if (this.md === 1) {
-        if (!this.obj) {
-          let firstIntersect
-          for (let i in level.objects) {
-            let obj = level.objects[i]
-            if (obj.physical && intersectRect(obj, this)) {
-              firstIntersect = obj
-              break
-            }
-          }
-
-          if (firstIntersect) {
-            if (firstIntersect.explode) {
-              let obj = firstIntersect.explode(level)
-              this.obj = obj
-              this.md = 0
-              return
-            }
-
-            this.obj = firstIntersect
-            this.md = 0
-            return
-          }
-        }
-
-        if (this.player.superStrength) {
-          this.d += 10
-        } else {
-          this.d += 5
-        }
-      } else {
-        if (this.player.superStrength) {
-          this.d -= 10
-        } else {
-          this.d -= this.obj ? 5 * (1 - this.obj.weight) : 10
-        }
-      }
-    }
-  }
-}
-
-export class Player extends GameObject {
-  constructor (x, y, mh) {
-    super(x, y, 60, 55, '#4d4b4f')
     this.x = x
     this.y = y
 
-    this.hook = new Hook(this, this.x + this.w / 2, this.y + this.h, 20, 20, mh)
+    this.width = w
-    this.hook.r = FULL_ROTATION
+    this.height = h
 
-    this.superStrength = false
+    this.mX = 0
+    this.mY = 0
+
+    this.grounded = false
+
+    this.speed = 5
+    this.gravity = 1
+    this.jumpPower = 20
   }
 
-  score (object) {
+  moveAndSlide (collider) {
-    console.log('Scored', object)
+    // y collision
+    let oldY = this.y
+    this.y += this.mY
+    if (oldY !== this.y && collider.collide(this)) {
+      if (this.y > oldY) this.grounded = true
+      this.y = oldY
+      this.mY = 0
+    } else {
+      this.grounded = false
+    }
+
+    // x collision
+    let oldX = this.x
+    this.x += this.mX
+    if (oldX !== this.x && collider.collide(this)) {
+      this.x = oldX
+      this.mX = 0
+    }
   }
 
-  draw () {
+  update (dt, vp, world) {
-    // Draw player
+    this.mY += this.gravity
-    super.draw()
+    if (Input.isDown('a')) {
+      this.mX = -this.speed
+    } else if (Input.isDown('d')) {
+      this.mX = this.speed
+    } else {
+      this.mX = 0
+    }
 
-    // Draw hook
+    if (this.grounded && (Input.isDown('w') || Input.isDown('space'))) {
-    this.hook.draw()
+      this.mY = -this.jumpPower
+    }
 
-    //
+    this.moveAndSlide(world)
+
+    vp.x = parseInt(this.x - vp.width / 2)
+    vp.y = parseInt(this.y - vp.height / 2)
   }
 
-  update (level) {
+  draw (vp) {
-    if (!level) return
+    ctx.fillStyle = '#f00'
-    this.hook.update(level)
+    ctx.fillRect(this.x - vp.x, this.y - vp.y, this.width, this.height)
   }
 }
+
+export default Player

src/tiles.js

@@ -51,9 +51,8 @@ class TileMap {
 }
 
 class TileLayer {
-  constructor (name, collider = false, size = 16, tileSize = 16) {
+  constructor (name, size = 16, tileSize = 16) {
     this.name = name
-    this.collide = collider
     this.size = size
     this.tile = tileSize
     this.tiles = []
@@ -99,6 +98,61 @@ class TileLayer {
   }
 }
 
+class TilePhysicsLayer extends TileLayer {
+  constructor (size = 16, tileSize = 16) {
+    super('col', size, tileSize)
+  }
+
+  draw () {}
+
+  update (dt) {}
+
+  generateFromTiles (tiles) {
+    this.tiles = []
+    for (let i in tiles.tiles) {
+      let t = tiles.tiles[i]
+      let p = tiles.toXY(parseInt(i))
+      if (t === -1) {
+        this.tiles[i] = 0
+        continue
+      }
+
+      // If this tile has neighbors that are air but its not itself air, it has a collider
+      let l = tiles.tileAtXY(p.x - 1, p.y)
+      let r = tiles.tileAtXY(p.x + 1, p.y)
+      let u = tiles.tileAtXY(p.x, p.y - 1)
+      let d = tiles.tileAtXY(p.x, p.y + 1)
+      if ((l == null || l !== -1) && (r == null || r !== -1) &&
+        (u == null || u !== -1) && (d == null || d !== -1)) {
+        this.tiles[i] = 0
+        continue
+      }
+
+      this.tiles[i] = 1
+    }
+  }
+
+  collide (chunk, obj) {
+    let absPos = chunk.absPos
+    for (let i in this.tiles) {
+      let t = this.tiles[i]
+      if (t === 0) continue
+      let p = this.toXY(parseInt(i))
+      let minX = p.x * chunk.tile + absPos.x
+      let minY = p.y * chunk.tile + absPos.y
+      let maxX = minX + chunk.tile
+      let maxY = minY + chunk.tile
+
+      // Intersection check
+      if (minX > obj.x + obj.width || maxX < obj.x ||
+        minY > obj.y + obj.height || maxY < obj.y) continue
+
+      return { chunk, tile: i }
+    }
+    return false
+  }
+}
+
 class Chunk {
   constructor (ix, iy, size = 16, tileSize = 16) {
     this.x = ix
@@ -114,7 +168,9 @@ class Chunk {
 
   generateMap (tileMap, heightMap) {
     this.layers = []
-    let fgLayer = new TileLayer('fg', true, this.size, this.tile)
+    let bgLayer = new TileLayer('bg', this.size, this.tile)
+    let fgLayer = new TileLayer('fg', this.size, this.tile)
+    let clLayer = new TilePhysicsLayer(this.size, this.tile)
     for (let i = 0; i < this.size * this.size; i++) {
       let tileCoords = fgLayer.toXY(i)
       let tileAbs = this.toAbs(tileCoords)
@@ -137,7 +193,11 @@ class Chunk {
       }
       fgLayer.tiles.push(tileMap.indexOf('STONE'))
     }
+
+    clLayer.generateFromTiles(fgLayer)
+    this.layers.push(bgLayer)
     this.layers.push(fgLayer)
+    this.layers.push(clLayer)
     this.dirty = true
   }
 
@@ -201,6 +261,10 @@ class Chunk {
       // Create cached image
       this.img = cacheFactory.capture()
 
+      // Update collision
+      let cl = this.getLayer('col')
+      if (cl) cl.generateFromTiles(this.getLayer('fg'))
+
       // Don't update again next tick
       this.dirty = false
       this._updated = true
@@ -212,6 +276,12 @@ class Chunk {
       this.layers[i].update(dt)
     }
   }
+
+  collide (obj) {
+    let cl = this.getLayer('col')
+    if (!cl) return null
+    return cl.collide(this, obj)
+  }
 }
 
 class World {
@@ -231,6 +301,7 @@ class World {
     this._unloadTick = 0
     this._lastDrawCount = 0
     this._lastUpdateCount = 0
+    this._collide = []
   }
 
   getChunk (x, y) {
@@ -242,6 +313,7 @@ class World {
   }
 
   update (dt, vp) {
+    this._collide = []
     let posPoint = vp.chunkIn(this.chunkSize * this.tileSize)
     for (let x = posPoint.x - 4; x < posPoint.x + 5; x++) {
       for (let y = posPoint.y - 4; y < posPoint.y + 5; y++) {
@@ -251,8 +323,9 @@ class World {
           let n = new Chunk(x, y, this.chunkSize, this.tileSize)
           n.generateMap(this.tileMaps.GROUND, this.heightMap)
           this.chunks.push(n)
-          break
+          continue
         }
+        this._collide.push(exists)
       }
     }
 
@@ -303,6 +376,15 @@ class World {
       this._lastDrawCount++
     }
   }
+
+  collide (obj) {
+    if (!this._collide.length) return null
+    for (let i in this._collide) {
+      let c = this._collide[i]
+      let collide = c.collide(obj)
+      if (collide) return collide
+    }
+  }
 }
 
 export { TileMap, Chunk, World }

src/viewport.js

@@ -23,6 +23,21 @@ class Viewport {
     let adj = this.adjustCentered
     return { x: Math.floor(adj.x / size), y: Math.floor(adj.y / size) }
   }
+
+  update (dt, world) {
+    let full = world.chunkSize * world.tileSize
+    if (this.x < 0) {
+      this.x = 0
+    } else if (this.x + this.width > world.width * full) {
+      this.x = (full * world.width) - this.width
+    }
+
+    if (this.y < 0) {
+      this.y = 0
+    } else if (this.y + this.height > world.height * full) {
+      this.y = (full * world.height) - this.height
+    }
+  }
 }
 
 export default Viewport