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mazerenderer.js
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mazerenderer.js
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//////////////////////////////////////////////////////////////////////////////
// mazerenderer.js
//////////////////////////////////////////////////////////////////////////////
// Contains functions for drawing the maze in the canvas element defined in
// index.html
//////////////////////////////////////////////////////////////////////////////
function renderMaze(mazeCanvas)
{
var ctx = mazeCanvas.getContext("2d");
var tileWidth = mazeCanvas.width/MAZE_SIZE;
var tileHeight = mazeCanvas.height/MAZE_SIZE;
ctx.strokeStyle = WALL_COLOUR;
ctx.lineWidth = 2;
//loop through cells of the maze and draw lines
for(var x = 0; x<MAZE_SIZE; x++)
{
for(var y = 0; y<MAZE_SIZE; y++)
{
//render NS wall
if(walls_ns[x][y])
{
//calculate the start coords of this NS line
var nsStartX = (x * tileWidth) + tileWidth;
var nsStartY = (y * tileHeight);
//calculate the end coords of this NS line
var nsEndX = (x * tileWidth) + tileWidth;
var nsEndY = (y * tileHeight) + tileHeight;
//render this NS line
ctx.beginPath();
ctx.moveTo(nsStartX,nsStartY);
ctx.lineTo(nsEndX,nsEndY);
ctx.closePath();
ctx.stroke();
}
//render EW wall
if(walls_ew[x][y])
{
//calculate the start coords of this EW line
var ewStartX = x * tileWidth;
var ewStartY = y * tileHeight + tileHeight;
//calculate the end coords of this EW line
var ewEndX = x * tileWidth + tileWidth;
var ewEndY = y * tileHeight + tileHeight;
//render this EW wall
ctx.beginPath();
ctx.moveTo(ewStartX,ewStartY);
ctx.lineTo(ewEndX,ewEndY);
ctx.closePath();
ctx.stroke();
}
}
}
//render the goal in the bottom-right corner
var goalX = GOAL_CELL.x * tileWidth;
var goalY = GOAL_CELL.y * tileHeight;
var goalWidth = tileWidth*0.7;
var goalHeight = tileHeight*0.7;
ctx.fillStyle=GOAL_COLOUR;
ctx.fillRect(goalX + (tileWidth * 0.15), //x
goalY + (tileHeight * 0.15), //y
goalWidth, goalHeight);
}