src/net/habraun/sd/SimpleNarrowPhase.scala

   1 /*
   2         Copyright (c) 2009 Hanno Braun <hanno@habraun.net>
   3
   4         Licensed under the Apache License, Version 2.0 (the "License");
   5         you may not use this file except in compliance with the License.
   6         You may obtain a copy of the License at
   7
   8                 http://www.apache.org/licenses/LICENSE-2.0
   9
  10         Unless required by applicable law or agreed to in writing, software
  11         distributed under the License is distributed on an "AS IS" BASIS,
  12         WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13         See the License for the specific language governing permissions and
  14         limitations under the License.
  15 */
  16
  17
  18
  19 package net.habraun.sd
  20
  21
  22
  23 import collision._
  24 import math._
  25
  26
  27
  28 class SimpleNarrowPhase extends NarrowPhase {
  29
  30         var testCircleCircle: CircleCircleTest = new ContinuousCircleCircleTest
  31         var testCircleLineSegment: CircleLineSegmentTest = new ContinuousCircleLineSegmentTest
  32
  33
  34
  35         def inspectCollision(delta: Double, b1: Body, b2: Body) = b1.shape match {
  36                 case s1: Circle =>
  37                         b2.shape match {
  38                                 case s2: Circle =>
  39                                         val c1 = s1
  40                                         val c2 = s2
  41                                         val p1 = b1.position
  42                                         val p2 = b2.position
  43                                         val v1 = b1.velocity
  44                                         val v2 = b2.velocity
  45
  46                                         for (r <- testCircleCircle(c1, c2, p1, p2, v1 * delta, v2 * delta)) yield {
  47                                                 Collision(r.t, Contact(b1, b2, r.normal, -r.normal, r.contact))
  48                                         }
  49
  50                                 case s2: LineSegment =>
  51                                         val c = s1
  52                                         val ls = s2
  53                                         val pc = b1.position
  54                                         val pls = b2.position
  55                                         val vc = b1.velocity * delta
  56                                         val vls = b2.velocity * delta
  57
  58                                         for (r <- testCircleLineSegment(c, ls, pc, pls, vc, vls)) yield {
  59                                                 Collision(r.t, Contact(b1, b2, r.normal, -r.normal, r.contact))
  60                                         }
  61
  62                                 case _ =>
  63                                         None
  64                         }
  65
  66                 case s1: LineSegment =>
  67                         b2.shape match {
  68                                 case s2: Circle =>
  69                                         val c = s2
  70                                         val ls = s1
  71                                         val pc = b2.position
  72                                         val pls = b1.position
  73                                         val vc = b2.velocity * delta
  74                                         val vls = b1.velocity * delta
  75
  76                                         for (r <- testCircleLineSegment(c, ls, pc, pls, vc, vls)) yield {
  77                                                 Collision(r.t, Contact(b1, b2, r.normal, -r.normal, r.contact))
  78                                         }
  79
  80                                 case s2: LineSegment =>
  81                                         None
  82
  83                                 case _ =>
  84                                         None
  85                         }
  86
  87                 case _ =>
  88                         None
  89         }
  90 }