////////////////////////////////////////////////////////////////////////////// // // // Wii Opera SDK - Raycasting v1.8.10 2008-12-14 // // (c) 2007-2008 Daniel Gump. All Rights Reserved. // // http://wiioperasdk.com, http://hullbreachonline.com // // hullbreach@hullbreachonline.com // // // // Wii is a trademark of Nintendo Co., Ltd. // // Opera is a trademark of Opera, ASA. // // This software package is not associated with either company // // but was created to support users of both. Its alternative name // // when supporting other products is the HULLBREACH SDK. // // // // Redistribution and use in source and binary forms, with or without // // modification, are permitted provided that the following conditions // // are met: // // * Redistributions of source code must retain the above copyright // // notice, this list of conditions and the following disclaimer. // // * Redistributions in binary form must reproduce the above copyright // // notice, this list of conditions and the following disclaimer in // // the documentation and/or other materials provided with the // // distribution. // // * Neither the names HULLBREACH ONLINE nor WII OPERA SDK nor the names // // of its contributors may be used to endorse or promote products // // derived from this software without specific prior written // // permission. // // * If the explicit purpose of the software is not to support the // // Nintendo Wii or the Opera Web browser, then the names of such must // // not be used in any derived product. The name shall be the // // HULLBREACH SDK with a reference link to http://hullbreachonline. // // // // THIS SOFTWARE IS PROVIDED BY Daniel Gump ''AS IS'' AND ANY EXPRESS OR // // IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED // // WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE // // DISCLAIMED. IN NO EVENT SHALL Daniel Gump BE LIABLE FOR ANY DIRECT, // // INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES // // (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR // // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) // // HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, // // STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING // // IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE // // POSSIBILITY OF SUCH DAMAGE. // ////////////////////////////////////////////////////////////////////////////// function RayCast(){ //Canvas size WIDTH=240; HEIGHT=176; //Player's coordinates X=1.5; Y=1.5; U=0; V=1; PLANEU=1; PLANEV=0; ANGLE=0; ROTATESPEED=.2; MOVESPEED=.2; WALLSCENE=[]; TEXTURES=[]; TELEPORTS=[]; CANVAS=null; SKYFILL='rgb(0,0,0)'; GROUNDFILL='rgb(0,0,0)'; COLLISION=0; } RayCast.prototype.generateScene = function(){ CANVAS.fillStyle=SKYFILL; CANVAS.fillRect(0,0, WIDTH,HEIGHT>>1); CANVAS.fillStyle=GROUNDFILL; CANVAS.fillRect(0,HEIGHT>>1, WIDTH,HEIGHT); //Player location var rayX=X, rayY=Y; //Ray length data var sideDistX, sideDistY; //Stepping data var stepX, stepY; var side, hit; for(var column=WIDTH, camerastep = 2/WIDTH; column>=0; column-=8){ //Ray length var deltaDistX = Math.sqrt(1+((rayV=V+PLANEV*(cameraX = column*camerastep-1))*rayV)/((rayU=U+PLANEU*cameraX)*rayU)); var deltaDistY = Math.sqrt(1+(rayU*rayU)/(rayV*rayV)); //Find initial side dist stepX = stepY = -1; sideDistX = rayX-(mapX=X|0); sideDistY = rayY-(mapY=Y|0); if(rayU>=0){ stepX = 1; sideDistX = 1-sideDistX; } if(rayV>=0){ stepY = 1; sideDistY = 1-sideDistY; } sideDistX*=deltaDistX; sideDistY*=deltaDistY; //Step DDA do{ if(sideDistX>31?-perpWallDist:perpWallDist)))>>1)+(walkBounce=HEIGHT/(10*perpWallDist)); var drawEnd = ((lineHeight+HEIGHT)>>1)-drawStart; var wallX = side?rayX+perpWallDist*rayU:rayY+perpWallDist*rayV; var texX = ((wallX-(wallX|0))*(texture=TEXTURES[WALLSCENE[mapX][mapY]]).width)|0; if((!side && rayU>0) || (side && rayV<0)) texX = (texture.width-texX-1)>>1; var top=0; if(drawStart<0){ top=((1-HEIGHT/(HEIGHT-(drawStart<<1)))*(texture.height>>1))>>1; drawStart=0; drawEnd=HEIGHT; } CANVAS.drawImage(texture, texX,top, 1,(texture.height>>1)-top, column,drawStart, 8,drawEnd); } } RayCast.prototype.loadScene = function(array){ if(WALLSCENE = array.split(';')) for (i=WALLSCENE.length;--i>=0;) WALLSCENE[i] = WALLSCENE[i].split(','); } RayCast.prototype.moveForward = function(){ COLLISION=1; if(!WALLSCENE[(X+U*MOVESPEED)|0][Y|0]){ X+=U*MOVESPEED; COLLISION=0; } if(!WALLSCENE[X|0][(Y+V*MOVESPEED)|0]){ Y+=V*MOVESPEED; COLLISION=0; } } RayCast.prototype.moveBackward = function(){ COLLISION=1; if(!WALLSCENE[(X-U*MOVESPEED)|0][Y|0]){ X-=U*MOVESPEED; COLLISION=0; } if(!WALLSCENE[X|0][(Y-V*MOVESPEED)|0]){ Y-=V*MOVESPEED; COLLISION=0; } } RayCast.prototype.moveLeft = function(){ COLLISION=1; if(!WALLSCENE[(X-V*MOVESPEED)|0][Y|0]){ X-=V*MOVESPEED; COLLISION=0; } if(!WALLSCENE[X|0][(Y+U*MOVESPEED)|0]){ Y+=U*MOVESPEED; COLLISION=0; } } RayCast.prototype.moveRight = function(){ COLLISION=1; if(!WALLSCENE[(X+V*MOVESPEED)|0][Y|0]){ X+=V*MOVESPEED; COLLISION=0; } if(!WALLSCENE[X|0][(Y-U*MOVESPEED)|0]){ Y-=U*MOVESPEED; COLLISION=0; } } RayCast.prototype.checkTeleports = function(){ for(tele=TELEPORTS.length;--tele>=0;){ if(TELEPORTS[tele][0]==.5+(Y|0) && TELEPORTS[tele][1]==.5+(X|0)){ if(TELEPORTS[tele][4]) document.location.href = TELEPORTS[tele][4]; Y = TELEPORTS[tele][2]; X = TELEPORTS[tele][3]; } } } RayCast.prototype.isCollided = function(){ return COLLISION; } RayCast.prototype.setAltitude = function(alt){ ALTITUDE=alt>=-5*HEIGHT?(alt<=5*HEIGHT?alt:5*HEIGHT):-5*HEIGHT; } RayCast.prototype.setDirection = function(angle){ U = Math.sin(ANGLE=angle*0.0174533); V = Math.cos(ANGLE); PLANEU = Math.sin(ANGLE+1.5707963); PLANEV = Math.cos(ANGLE+1.5707963); } RayCast.prototype.setGroundColor = function(r,g,b){ GROUNDFILL="rgb("+(r<0?0:(r>255?255:r|0))+","+(g<0?0:(g>255?255:g|0))+","+(b<0?0:(b>255?255:b|0))+")"; } RayCast.prototype.setLocation = function(x,y){ X=y; Y=x; } RayCast.prototype.setSize = function(w,h){ WIDTH=w; HEIGHT=h; } RayCast.prototype.setSkyColor = function(r,g,b){ SKYFILL="rgb("+(r<0?0:(r>255?255:r|0))+","+(g<0?0:(g>255?255:g|0))+","+(b<0?0:(b>255?255:b|0))+")"; } RayCast.prototype.setTeleports = function(teleports){ TELEPORTS=teleports; } RayCast.prototype.setTextures = function(textures){ TEXTURES=textures; } RayCast.prototype.setWalls = function(Walls){ WALLSCENE = Walls; } RayCast.prototype.initialize = function(canvas){ CANVAS = canvas.getContext("2d"); } RayCaster = new RayCast();