001package votorola.s.gwt.scene.dum; // Copyright 2010, Michael Allan. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Votorola Software"), to deal in the Votorola Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicence, and/or sell copies of the Votorola Software, and to permit persons to whom the Votorola Software is furnished to do so, subject to the following conditions: The preceding copyright notice and this permission notice shall be included in all copies or substantial portions of the Votorola Software. THE VOTOROLA SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE VOTOROLA SOFTWARE OR THE USE OR OTHER DEALINGS IN THE VOTOROLA SOFTWARE. 002 003import java.util.HashMap; 004import votorola.s.gwt.scene.*; 005import votorola.s.gwt.scene.axial.TriaxialScoping; 006import votorola.s.gwt.scene.feed.*; 007import votorola.s.gwt.stage.poll.*; 008import votorola.g.hold.*; 009 010 011/** A dummy implementation of a scene that situates polls in three dimensions according to 012 * two different hashes of the poll name. The dummy scene uses {@linkplain 013 * TriaxialScoping triaxial scoping}, q.v. for the format of the 's' scoping switch. 014 */ 015public final class DummyScene implements Scene, Hold 016{ 017 018 019 /** Constructs a DummyScene. Call {@linkplain #release release}() when done with it. 020 */ 021 public DummyScene() 022 { 023 for( final String pollName: Dummy.POLL_NAME_ARRAY ) 024 { 025 polls.put( /*key*/pollName, new MappedPoll( pollName )); 026 } 027 } 028 029 030 031 // ```````````````````````````````````````````````````````````````````````````````````` 032 // init for early use 033 034 035 private Spool spool = new Spool1(); 036 037 038 039 // ------------------------------------------------------------------------------------ 040 041 042 /** Tests whether the specified poll is within the current scope of this scene. 043 */ 044 boolean inScope( final MappedPoll poll ) 045 { 046 final float x = poll.x(); 047 if( x < scoping.xMin() || x > scoping.xMax() ) return false; 048 049 final float y = poll.y(); 050 if( y < scoping.yMin() || y > scoping.yMax() ) return false; 051 052 final float z = poll.z(); 053 if( z < scoping.zMin() || z > scoping.zMax() ) return false; 054 055 return true; 056 } 057 058 059 060 /** All known polls, keyed by poll name. 061 * 062 * @see Dummy#POLL_NAME_ARRAY 063 */ 064 HashMap<String,MappedPoll> polls() { return polls; } 065 066 067 private final HashMap<String,MappedPoll> polls = new HashMap<String,MappedPoll>(); 068 069 070 071 /** The scoping model for this scene. 072 */ 073 TriaxialScoping scoping() { return scoping; } 074 075 076 private final TriaxialScoping scoping = new TriaxialScoping( spool ); 077 078 079 080 // - H o l d -------------------------------------------------------------------------- 081 082 083 public void release() { spool.unwind(); } 084 085 086 087 // - S c e n e ------------------------------------------------------------------------ 088 089 090 public boolean inScope( final BiteJS bite ) 091 { 092 final PollJS poll = bite.poll(); 093 if( poll == null ) return false; 094 095 final String pollName = poll.name(); 096 if( pollName == null ) return false; 097 098 final MappedPoll pollM = polls.get( pollName ); 099 if( pollM == null ) return false; 100 101 return inScope( pollM ); 102 } 103 104 105 106 // ==================================================================================== 107 108 109 /** A poll together with its mapping particulars. 110 */ 111 static final class MappedPoll 112 { 113 114 private MappedPoll( String _name ) 115 { 116 name = _name; 117 x = hash( name, 29 ); 118 y = hash( name, 999331 ); 119 z = hash( name, 443 ); 120 } 121 122 123 private float hash( final String s, final int prime ) 124 { 125 int i = 0; 126 for( int c = s.length() - 1; c >= 0; --c ) 127 { 128 i = i * prime + s.charAt(c); 129 i |= 0; // truncate to 32 bits when running in browser, where int is actually double 130 } 131 132 float f = Math.abs( i/(float)Integer.MAX_VALUE ); 133 // if( f < 0f ) f = 0f; 134 // else if( f >= 1f) f = Math.nextAfter( 1f, 0d ); // exclude 1.0 135 //// 'nextAfter' not available in client, but this is also valid: 136 if( f < 0f || f >= 1f ) f = 0f; 137 return f; 138 } 139 140 141 // -------------------------------------------------------------------------------- 142 143 144 /** The name of this mapped poll. 145 * 146 * @see <a href='pol.xht#poll-id-service' target='_top'>http://reluk.ca/project/_/outcast/pol.xht#poll-id-service</a> 147 */ 148 public String name() { return name; } 149 150 private final String name; 151 152 153 /** The x-axis hash of the poll name. 154 * 155 * @return a number between 0.0 inclusive and 1.0 exclusive. 156 */ 157 float x() { return x; } 158 159 private final float x; 160 161 162 /** The y-axis hash of the poll name. 163 * 164 * @return a number between 0.0 inclusive and 1.0 exclusive. 165 */ 166 float y() { return y; } 167 168 private final float y; 169 170 171 /** The z-axis hash of the poll name. 172 * 173 * @return a number between 0.0 inclusive and 1.0 exclusive. 174 */ 175 float z() { return z; } 176 177 private final float z; 178 179 180 // - O b j e c t ------------------------------------------------------------------ 181 182 183 public @Override String toString() 184 { 185 return "mapped poll " + name + "(" + x + "," + y + "," + z + ")"; 186 } 187 188 189 190 } 191 192 193 194}