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game.js
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game.js
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// The dimensions of the three-dimensional buffer used to store a slice
// of the world map.
var HEIGHT = 20;
var WIDTH = 90;
var DEPTH = 90;
// The three-dimensional center of the buffer area.
var z_center = HEIGHT / 2;
var x_center = WIDTH / 2;
var y_center = DEPTH / 2;
// Available levels
var INTRO = 0;
var CUBE_FRAME = 1;
var FIGURE_EIGHT = 2;
var MOVING_MAP = 3;
var PENROSE = 4;
var TESTER = 5;
var WETLANDS = 6;
var RECTANGLES = 7;
var SPINNING_SECTORS = 8;
// Enumeration of block types.
var EMPTY = 0;
var SOLID_BLOCK = 1;
var PLAYER = 2;
var STREET_LIGHT = 3;
var WAVE = 4;
var INVISIBLE_BLOCK = 5;
var INVISIBLE_SCAFFOLDING = 6;
var MAX_FUEL = 10
///////////////////////////////////////////////////
// //
// The things that follow aren't constants. //
// They should be moved out of the global scope. //
// //
///////////////////////////////////////////////////
// Debug message to show above the main scene.
var debug_message = "";
// 3D buffer storing block data
var blocks;
// The two-dimensional offset of the three-dimensional center from the
// two-dimensional rendered position of the [0,0,0].
var render_x = -3 * x_center + 2 * y_center;
var render_y = -2 * z_center + y_center;
// Uncropped dimensions of the two-dimensional buffer used to store renderings
// of the 3D scene. This may have roughness around the edges.
var VIEWPORT_HEIGHT, VIEWPORT_WIDTH;
// Reference coordinate from which to render all 3D objects.
var RENDERING_BASEPOINT_X, RENDERING_BASEPOINT_Y;
// Fine-grained offset of rendering from the rendering basepoint, used to enable
// sub-block-sized motion
var render_x_offset = 0;
var render_z_offset = 0;
// These offsets are the offset of the world coordinates from the buffer slice coordinates.
var offsetZ = 0;
var offsetX = 30;
var offsetY = 20;
function getFlagInfo(level, z, x, y){
if (level.map_id === INTRO) {
if (x < 40) {
return {message: ["Welcome!", "Arrows keys to move,", "spacebar to jetpack."],
finished: false};
} else {
return {message:["Congratulations,", "you made it!"], finished:true};
}
}
if (level.map_id === CUBE_FRAME) {
if (Math.abs(x) < 100 && Math.abs(y) < 100) {
let seed = Math.abs((x + y)%3);
if (seed == 0) {
return {message: ["You'll have to look", "a little further", "than this!"],
finished: false};
}
if (seed == 1) {
return {message: ["I hear you need", "to go far out..."],
finished: false};
}
if (seed == 2) {
return {message: ["Not here!"],
finished: false};
}
} else {
return {message: ["You made it!"],
finished: true};
}
}
if (level.map_id === FIGURE_EIGHT) {
let flag_number;
if (y > 0) {
flag_number = 2;
}
else if (x > 5) {
flag_number = 1;
} else {
flag_number = 3;
}
let difference_code = (((flag_number - level.figureEightState) % 3) + 3) % 3;
if (difference_code == 1) {
level.figureEightState += 1;
}
// if (difference_code == 2) {
// level.figureEightState -= 1;
// }
if (level.figureEightState >= 10) {
return {message:["You made it!", "(" + level.figureEightState + " / 10)"], finished:true};
}
if (difference_code != 2) {
return {message:["Keep going!", "(" + level.figureEightState + " / 10)"], finished:false};
}
if (difference_code == 2) {
return {message:["Wrong flag!", "(" + level.figureEightState + " / 10)"], finished:false};
}
}
return {message:["Finish!"], finished:true}
};
// Modify buffer sizes and change rendering parameters according to the provided dimensions.
function handle2DBufferDimensionChange(w, h){
if (VIEWPORT_WIDTH == w && VIEWPORT_HEIGHT == h) {
return;
}
VIEWPORT_HEIGHT = h;
VIEWPORT_WIDTH = w;
// Put the middle of the render box in the middle of the display.
RENDERING_BASEPOINT_X = ~~(VIEWPORT_WIDTH / 2 - render_x);
RENDERING_BASEPOINT_Y = ~~(VIEWPORT_HEIGHT / 2 - render_y);
resizeBuffers();
};
function keyForCoord(z, x, y) {
return z.toString() + " " + x.toString() + " " + y.toString();
}
function tileIsVisible(tile) {
return tile != EMPTY && tile != INVISIBLE_BLOCK;
}
function coordinateComparison(a, b) {
return a[1] - b[1] || a[2] - b[2] || a[0] - b[0];
}
// Returns a list of 3D coordinates corresponding to the blocks that will be rendered completely
// into the 2D buffer, sorted so that blocks always appear earlier than any blocks that cover them.
function getSortedCoordinates(blocks){
var coordinates = [];
var X = blocks[0].length;
var Y = blocks[0][0].length;
var Z = blocks.length;
for (var x = 0; x < X; x++) {
for (var y = 0; y < Y; y++) {
for (var z = 0; z < Z; z++) {
var YY = RENDERING_BASEPOINT_Y -2*z + y;
var XX = RENDERING_BASEPOINT_X -3*x + 2*y;
// YY >= 1 is because cropping may move
// Similar for VIEWPORT_HEIGHT - 1
if ( XX -1 >= 0 && XX + 4 < VIEWPORT_WIDTH && YY >= 1 && YY + 3 < VIEWPORT_HEIGHT - 2) {
coordinates.push([z,x,y]);
}
}
}
}
return coordinates;
}
function setAll(lines, value) {
for (var i = 0; i < lines.length; i++) {
for (var j = 0; j < lines[i].length; j++) {
lines[i][j] = value;
}
}
}
function clear(lines) {
setAll(lines, " ");
}
// Fills in |lines| by iterating through |blocks| using |sortedCoordinates|
// - lines: Buffer to which we will render the text
// - level: Container for all the information associated with a given map.
function render(lines, level, found_end_callback) {
var X = RENDERING_BASEPOINT_X + level.horizontal_camera_correction; // rightward shift of basepoint
var Y = RENDERING_BASEPOINT_Y + level.vertical_camera_correction; // downward shift of basepoint
clear(lines);
// Extra coordinates to be injected into the loop. Should be sorted in the
// same way as sortedCoordinates.
var extra_coordinates = [level.playerpos.slice(0)];
var block_index = 0;
var extra_index = 0;
var get_next = level.getFreshIterator();
while (true) {
var c = get_next();
if (c === null) {
return;
}
var z = c[0];
var x = c[1];
var y = c[2];
var depth = x + y + z;
var tile = level.getWorldTile(z, x, y);
if (!tileIsVisible(tile) || tile == INVISIBLE_SCAFFOLDING) {
continue;
}
var hasXNeighbor = level.getWorldTile(z, x-1, y) == SOLID_BLOCK;
var hasYNeighbor = level.getWorldTile(z, x, y-1) == SOLID_BLOCK;
var hasZNeighbor = level.getWorldTile(z-1, x, y) == SOLID_BLOCK;
var hasXZNeighbor = level.getWorldTile(z+1, x-1, y) == SOLID_BLOCK;
var hasXYNeighbor = level.getWorldTile(z, x-1, y+1) == SOLID_BLOCK;
var hasYXNeighbor = level.getWorldTile(z, x+1, y-1) == SOLID_BLOCK;
var hasYZNeighbor = level.getWorldTile(z+1, x, y-1) == SOLID_BLOCK;
var hasZXNeighbor = level.getWorldTile(z-1, x+1, y) == SOLID_BLOCK;
var hasZYNeighbor = level.getWorldTile(z-1, x, y+1) == SOLID_BLOCK;
var hasYZXNeighbor = level.getWorldTile(z+1, x-1, y-1) == SOLID_BLOCK;
var hasYXBehindNeighbor = level.getWorldTile(z, x-1, y-1) == SOLID_BLOCK;
// World coordinates -> "block" coordinates -> Screen coordinates
var YY = Y -2*(z + offsetZ) + (y + offsetY);
var XX = X -3*(x + offsetX) + 2*(y + offsetY);
if (YY < 0 || YY + 3 >= VIEWPORT_HEIGHT || XX <= 1 || XX + 4 > VIEWPORT_WIDTH) {
continue;
}
if (tile == SOLID_BLOCK){
// -101234
// 0 __
// 1 |\__\
// 2 | | |
// 3 \|__|
lines[YY][XX] = (hasYNeighbor && !hasYZNeighbor) ? " " :"_";
lines[YY][XX + 1] = (hasYNeighbor && !hasYZNeighbor) ? (hasYZXNeighbor ? lines[YY][XX + 1] : " ") :(hasYXBehindNeighbor? lines[YY][XX+1]:"_");
if (hasXZNeighbor && !hasYXBehindNeighbor) {
lines[YY][XX + 2] = "|";
} else {
if (hasYNeighbor && !hasYZNeighbor) {
if (!hasYZXNeighbor) {
if (!hasYXBehindNeighbor) {
lines[YY][XX + 2] = "\\";
} else {
lines[YY][XX + 2] = " ";
}
}
} else {
lines[YY][XX + 2] = "_";
}
}
lines[YY + 1][XX - 1] = (hasYNeighbor && !hasYXNeighbor) ? " " :"|";
lines[YY + 1][XX] = "\\";
lines[YY + 1][XX + 1] = "_";
lines[YY + 1][XX + 2] = "_";
lines[YY + 1][XX + 3] = (!hasXZNeighbor) ? "_" : "\\";
if (!hasXZNeighbor && !hasXNeighbor) {
lines[YY + 1][XX + 4] = "\\"
}
lines[YY + 2][XX - 1] = (hasYNeighbor && !hasYXNeighbor) ? " " :"|";
lines[YY + 2][XX] = " ";
lines[YY + 2][XX + 1] = "|";
lines[YY + 2][XX + 2] = " ";
lines[YY + 2][XX + 3] = " ";
if (hasXNeighbor && !hasXYNeighbor){
lines[YY + 2][XX + 4] = " ";
} else{
lines[YY + 2][XX + 4] = "|";
}
lines[YY + 3][XX] = (hasZNeighbor && !hasZXNeighbor) ? " " : "\\";
lines[YY + 3][XX + 1] = "|";
if (hasZNeighbor && !hasZYNeighbor) {
lines[YY + 3][XX + 2] = " ";
lines[YY + 3][XX + 3] = " ";
} else {
lines[YY + 3][XX + 2] = "_";
lines[YY + 3][XX + 3] = "_";
}
if (hasXYNeighbor) {
lines[YY + 3][XX + 4] = "|";
} else if (hasXNeighbor){
if (hasZNeighbor && !hasZYNeighbor) {
lines[YY + 3][XX + 4] = " ";
} else {
lines[YY + 3][XX + 4] = "_";
}
} else {
lines[YY + 3][XX + 4] = "|";
}
} else if (tile == STREET_LIGHT){
var distance = Math.max(Math.abs(level.playerpos[1] - x), Math.abs(level.playerpos[2] - y));
var height = 0;
for (var test_height_offset = 0; test_height_offset < 10; test_height_offset++) {
if (level.getWorldTile(z - test_height_offset, x, y) == STREET_LIGHT) {
height = test_height_offset;
} else {
break;
}
}
var close = distance + height < 10;
var bright = close;// && (Math.sin(new Date().getTime() * 3.14 / 300 - z / 2) > 0.0);
lines[YY + 1][XX + 3] = bright ? "<span style = \"color:white\">!</span>" : "?";
if (bright && level.getWorldTile(z + 1, x, y) != STREET_LIGHT && level.getWorldTile(z + 1, x, y) != PLAYER) {
var flag_info = getFlagInfo(level, z, x, y);
var msg = flag_info.message;
for (var row = 0; row < msg.length; row++) {
for (var col = 0; col < msg[row].length; col++) {
try {
lines[YY + 1 + row][XX + 5 + col] = msg[row][col];
} catch (err) {
// ignore
}
}
}
if (flag_info.finished) {
found_end_callback();
}
}
lines[YY + 2][XX + 3] = bright ? "<span style = \"color:white\">|</span>" : ".";
lines[YY + 3][XX + 3] = bright ? "<span style = \"color:white\">|</span>" : ".";
} else if (tile == WAVE){
lines[YY+2][XX+0] = "~";
lines[YY+2][XX+1] = "~";
lines[YY+2][XX+2] = "~";
}
else {
// Render the player
lines[YY + 2 - level.vertical_player_correction][XX + 0 + 2 - level.horizontal_player_correction] = "<span style = \"color:white\">" + ( (level.pvx - 0.66 * level.pvy) > 0.15 ? "\\" : ((level.pvx - 0.66 * level.pvy) < -0.15 ? "/" : "|")) + "</span>";
}
}
}
function physics(blocks) {
for (var y = 0; y < blocks[0][0].length; y++) {
for (var x = 0; x < blocks[0].length; x++) {
for (var z = 0; z < blocks.length - 1; z++) {
if (blocks[z+1][x][y]==2 && !blocks[z][x][y]) {
blocks[z][x][y] = blocks[z+1][x][y];
blocks[z+1][x][y] = 0;
}
}
}
}
}
var keyStates = {};
function setString(element, lines) {
// element.innerHTML = debug_message;
//element.innerHTML = "";
var partialJoin = [];
// partialJoin.push(debug_message);
skipInitial = 4;
skipEnd = 5;
// if (LEVEL == SPINNING_SECTORS) {
// skipInitial = 16;
// skipEnd = 14;
// }
var leftcut = 0;
var rightcut = 0;
for (var i = skipInitial; i < lines.length-skipEnd; i++) {
partialJoin.push (lines[i].slice(5 + leftcut, VIEWPORT_WIDTH - 4 - rightcut).join(""));
}
element.innerHTML = partialJoin.join("<br>");
// element.innerHTML += "<br>" + (keyStates["W"] ? "^" : "w") + "<br>" +
// (keyStates["A"] ? "<" : "a") +
// (keyStates["S"] ? "v" : "s") +
// (keyStates["D"] ? ">" : "d") +
// "<br>" +
// (keyStates["J"] ? "[JETPACK]":"[ ]") +
// "<br>WASD to move, J to jetpack";
}
function generateBlockArray(height, width, depth) {
blocks = [];
for (var z = 0; z < height; z++) {
layer = [];
for (var x = 0; x < width; x++) {
line = [];
for (var y = 0; y < depth; y++) {
line.push(0);
}
layer.push(line);
}
blocks.push(layer);
}
return blocks;
}
function generateArrayWithEntries(rows, cols, value) {
var lines = []
for (var i = 0; i < rows; i++) {
line = [];
for (var j = 0; j < cols; j++) {
line.push(value)
}
lines.push(line);
}
return lines;
}
function generateLines(rows, cols) {
return generateArrayWithEntries(rows, cols, " ");
}
function generateDepthBuffer(rows, cols) {
return generateArrayWithEntries(rows, cols, -1);
}
var lines, renderBuffer, depthBuffer;
function resizeBuffers() {
console.log("Resizing buffers.");
lines = generateLines(VIEWPORT_HEIGHT, VIEWPORT_WIDTH);
renderBuffer = generateLines(VIEWPORT_HEIGHT, VIEWPORT_WIDTH);
depthBuffer = generateDepthBuffer(VIEWPORT_HEIGHT, VIEWPORT_WIDTH);
}
function getWetlandTile(z, x, y) {
var output = EMPTY;
var height = 0;
if (z < 0) {
output = EMPTY;
}
if (~~(z-height) == 0 ) {
output = SOLID_BLOCK;
} else {
var waterLevel = 3;
var terrainSurface = ( ( Math.sin(x*0.05 + y*0.1) + Math.sin(x*0.05 + y * 0.08) + Math.sin(x*0.1) + Math.sin(y *0.1 ))) + waterLevel;
if (z <= terrainSurface && terrainSurface > waterLevel) {
output = SOLID_BLOCK;
} else if (z == waterLevel) {
// draw water
if (x % 4 == 0 && y % 4 == 0) {
output = WAVE;
}
} /*else if (z < terrainSurface + 2 * (terrainSurface - waterLevel)) {
output = SOLID_BLOCK;
}*/
}
if (z <= 4) {
if ( (~~(x/5)) % 20 == 0 || (~~(y / 5)) % 20 == 0 ) {
X = ~~(x/100);
Y = ~~(y/100);
if (Math.sin(X*X) + Math.cos(Y*Y) > 0) {
output = SOLID_BLOCK;
}
}
}
if (x % WIDTH == 0 && y%DEPTH == 0 && Math.abs(z - height) < 10 ) {
output = STREET_LIGHT;
}
if (z > 60 && Math.abs(Math.abs(x) % 20 - 10 ) + Math.abs(Math.abs(y) % 20 - 10) + Math.abs(z % 20 - 10) < (z-60)/20 ) {
output = SOLID_BLOCK;
}
if (z > 90) {
var a = ((x-10) % 20) == 0;
var b = ((y-10) % 20) == 0;
var c = ((z-10) % 20) == 0;
//if ((a&&(b || c)) || (b&&c)) {
if (a + b + c > 1) {
output = SOLID_BLOCK;
}
}
return output;
}
function getSpinningSectorsTile(z, x, y) {
var output = EMPTY;
if (z == 0) {
return SOLID_BLOCK
}
if (x*x + y*y + z*z < 64 && x*x + y*y + z*z > 16) {
date = new Date()
t = date.getTime()
/*if (Math.abs(z - 2 * Math.sin( (x - y) / 10 + t / 500)) < 0.5) {
output = SOLID_BLOCK
}*/
/*if (Math.abs( (x + y) * Math.cos(t / 500) + (z) * Math.sin(t / 500)) < 1.2) {
output = SOLID_BLOCK
}*/
height = 0;
l = Math.sqrt(x*x + y*y);
dot = x * Math.cos(t/500) + y * Math.sin(t / 500);
if (dot / l > 0.9 || dot / l < -0.9) {
height += 1;
}
/*if (dot / l > 0.7) {
height += SOLID_BLOCK;
}*/
/*if (dot / l < -0.8) {
height -= SOLID_BLOCK;
}*/
if (z <= height && z >= 0) {
output = SOLID_BLOCK;
if (dot / l < 0.4 && dot / l > -0.4) {
output = EMPTY;
}
}
}
if (z==0 && y==0 && x==0) {
output = PLAYER;
}
return output;
}
function getFigureEightWorldTile(z, x, y) {
var tile = getFigureEightWorldTileInternal(z, x, y);
if (tile == INVISIBLE_BLOCK) {
return EMPTY;
}
return tile;
}
function getFigureEightWorldTileInternal(z, x, y) {
if (x < -20 || x > 20 || y < -20 || y > 20 || z < 0) {
return INVISIBLE_BLOCK;
}
if (x <= 18 && y <= 18 && x >= 2 && y >= 2) {
return INVISIBLE_BLOCK;
}
if (-x <= 18 && -y <= 18 && -x >= 2 && -y >= 2) {
return INVISIBLE_BLOCK;
}
if (x >= 2 && y <= -2) {
return INVISIBLE_BLOCK;
}
if (x <= -2 && y >= 2) {
return INVISIBLE_BLOCK;
}
if (z == 0) {
if (x > -2 && y > 18) {
return SOLID_BLOCK;
}
if (x < 2 && y < -18) {
return SOLID_BLOCK;
}
if (x > -2 && x < 2) {
return SOLID_BLOCK;
}
return INVISIBLE_BLOCK;
}
if (z > 0 && z < 5) {
if (x == 0 && y == 19) {
return STREET_LIGHT;
}
if (x == 0 && y == -19) {
return STREET_LIGHT;
}
if (x < -18 && y < -18) {
return SOLID_BLOCK;
}
if (x > 18 && y > 18) {
return SOLID_BLOCK;
}
if (x > -2 && y > 18) {
return EMPTY;
}
if (x < 2 && y < -18) {
return EMPTY;
}
if (x > -2 && x < 2) {
return EMPTY;
}
return INVISIBLE_BLOCK;
}
if (z == 5) {
if (y > -2 && x > 18) {
return SOLID_BLOCK;
}
if (y < 2 && x < -18) {
return SOLID_BLOCK;
}
if (y > -2 && y < 2) {
return SOLID_BLOCK;
}
if (x > -2 && y > 18) {
return EMPTY;
}
if (x < 2 && y < -18) {
return EMPTY;
}
if (x > -2 && x < 2) {
return EMPTY;
}
return INVISIBLE_BLOCK;
}
if (z < 10 && x == 19 && y == 0) {
return STREET_LIGHT;
}
return EMPTY;
}
function getMovingMapTile(z, x, y) {
date = new Date()
t = date.getTime()
if ((x % 10 == 0) && (y % 10 == 0) && x * x + y * y > 40000 && z < 10 && z > 0) {
if (Math.sin(t / 2000 + x / 10 + y / 10) + Math.cos(t / 4000 + x / 10 - y / 7) <= 0.1) {
return STREET_LIGHT;
}
}
if (z != 0) {
return EMPTY;
}
if (x * x + y * y < 25) {
return SOLID_BLOCK;
}
// if ((x % 10 == 0) && (y % 10 == 0)) {
// return SOLID_BLOCK;
// }
if ((x % 10 == 0) || (y % 10 == 0)) {
if (Math.sin(t / 2000 + x / 10 + y / 10) + Math.cos(t / 4000 + x / 10 - y / 7) > 0.1) {
return INVISIBLE_SCAFFOLDING;
}
return SOLID_BLOCK;
}
return EMPTY;
}
function getPenroseTile(z, x, y) {
return getPenroseTileInternal(z, x, y, false);
}
function getPenroseTileAlternative(z, x, y) {
return getPenroseTileInternal(z, x, y, true);
}
function getPenroseTileInternal(z, x, y, use_alternative_map) {
var X = ~~(x/5);
if (X < 1 || x > 51) {
return EMPTY;
}
var Y = ~~(y/5);
if (Y < 1 || Y > 10) {
return EMPTY;
}
if (use_alternative_map) {
if (Y >= 2 && y < 19 && x <= 35 && x > 29) {
if (z == -4) {
return SOLID_BLOCK;
}
return EMPTY;
}
}
if (Y > 1 && Y < 10 && X > 1 && x < 46) {
return EMPTY;
}
var target_height = 0;
if (Y == 1) {
target_height = - (~~(x/4.5)) / 2;
if (x > 35) {
return EMPTY;
}
}
if (X == 1) {
target_height = (y - 5) / 12;
}
if (Y == 10 && x >= 5) {
target_height = 3 + ((x + 1) / 12);
}
if (x >= 46) {
// target_height = 8;
target_height = 7 + (55 - y) / 13;
if (!use_alternative_map && y < 34) {
return EMPTY;
}
if (use_alternative_map && y < 43) {
return EMPTY;
}
}
if (z == ~~target_height) {
return SOLID_BLOCK;
}
return EMPTY;
}
function getRectanglesLevelTile(z, x, y) {
if (z == 0) {
return SOLID_BLOCK;
} else if (z == 1) {
var xxx = Math.abs(x);
var yyy = Math.abs(y);
if ((xxx >= yyy && xxx % 5 == 4) || (yyy >= xxx && yyy % 10 == 5) ) {
return SOLID_BLOCK;
} else {
return EMPTY;
}
} else if (z==playerpos[0] && x==playerpos[1] && y==playerpos[2]) {
return PLAYER;
} else {
return EMPTY;
}
}
function getCubeFrameTile(z, x, y) {
var output = EMPTY;
if (z == 0) {
output = SOLID_BLOCK;
} else{
d = 11
D = 22
// Extra ((... + D) % D) is to handle negative numbers
x = ((((x + d) % D) + D) % D) - d
y = ((((y + d) % D) + D) % D) - d
a = Math.abs(x) == 4;
b = Math.abs(z - 5) == 4;
c = Math.abs(y) == 4;
A = Math.abs(x) <= 4;
B = Math.abs(z - 5) <= 4;
C = Math.abs(y) <= 4;
if (x == y && y == 0 && z > 0 && z < 10) {
output = STREET_LIGHT;
}
if (a && b && C || a && B && c || A && b && c) {
output = SOLID_BLOCK;
}
}
return output;
}
function getIntroTile(z, x, y) {
var val = getIntroTileInternal(z, x, y);
if (val == INVISIBLE_BLOCK) {
return EMPTY;
}
return val;
}
function getIntroTileInternal(z,x,y) {
if (x <= 3) { // earliest section of map
if (Math.abs(x) >= 4 || Math.abs(y) >= 4 || z < 0) {
return INVISIBLE_BLOCK;
}
if (z >= 3 && z <= 9 && x == 0 && y == 0) {
return STREET_LIGHT;
}
if (z <= 2) {
return SOLID_BLOCK;
}
return EMPTY;
} else if (x <= 20) { // first bridge
if (Math.abs(y) > 1) {
return INVISIBLE_BLOCK;
}
if (z == 2) {
return SOLID_BLOCK;
}
if (z < 2) {
return INVISIBLE_BLOCK;
}
return EMPTY;
}
if (x <= 21) { // vertical drop
if (Math.abs(y) > 1) {
return INVISIBLE_BLOCK;
}
if (z <= 2 && z >= -3) {
return SOLID_BLOCK;
}
return EMPTY;
}
if (x <= 35) { // second bridge
if (Math.abs(y) > 1) {
return INVISIBLE_BLOCK;
}
if (z == -3) {
return SOLID_BLOCK;
}
return EMPTY;
}
if (x <= 40) { // perpendicular
if (y < -1) {
return INVISIBLE_BLOCK;
}
if (y > 20) {
return INVISIBLE_BLOCK;
}
if (z == -3) {
return SOLID_BLOCK;
}
return EMPTY;
}
if (y < 28) {
if (x < 80) {
if (y <= 20) {
if (y < 17) {
return INVISIBLE_BLOCK;
}
if (z == -3) {
return SOLID_BLOCK;
}
if (x > 75 && z >= -12 && z <= -3 && y == 20) {
return SOLID_BLOCK;
}
if (z < -3) {
return INVISIBLE_BLOCK;
}
return EMPTY;
}
if (x <= 75) {
return INVISIBLE_BLOCK;
}
if (x > 75 && z == -12) {
return SOLID_BLOCK;
}
return EMPTY;
}
return INVISIBLE_BLOCK;
}
if (y < 34) {
if (x == 78 && y == 31 && z>= -11 && z <= -5) {
return STREET_LIGHT;
}
if (x > 81) {
return INVISIBLE_BLOCK;
}
if (x < 75) {
return INVISIBLE_BLOCK;
}
if (z >= -15 && z <= -12) {
return SOLID_BLOCK;
}
return EMPTY;
}
return INVISIBLE_BLOCK;
}
function getTesterTile(z, x, y) {
d = new Date();
if (x * x + y * y + z * z + 20 * Math.sin(0.004 * d.getTime()) < 25) {
return SOLID_BLOCK;
}
if (Math.abs(x) < 20 && Math.abs(y) < 20 && (Math.abs(x) > 14 || Math.abs(y) > 14 || x == 0)) {
if (z == 2) {
return SOLID_BLOCK;
} else {
return EMPTY;
}
}
return INVISIBLE_BLOCK;
}
// Populates |blocks| with tiles by converting to world coordinates
// and the calculating the tile in world coordinates.
function setWaves(blocks, sortedCoordinates) {
for(var i = 0; i < sortedCoordinates.length; i++) {
c = sortedCoordinates[i];
blocks[c[0]][c[1]][c[2]] = getTile(c[0],c[1],c[2]);
}
}
function tryToMovePlayer(dz, dx, dy) {
if (getTile(playerpos[0] + dz, playerpos[1] + dx, playerpos[2] + dy) % 2 == 0) {
playerpos = [playerpos[0] + dz, playerpos[1] + dx, playerpos[2] + dy];
blocks[playerpos[0]-dz][playerpos[1]-dx][playerpos[2]-dy] = getTile(playerpos[0]-dz,playerpos[1]-dx,playerpos[2]-dy);
z = playerpos[0];
x = playerpos[1];
y = playerpos[2];
blocks[z][x][y] = 2;
}
}
function tileIsSolid(tile) {
return tile == SOLID_BLOCK || tile == INVISIBLE_BLOCK;
}
function autoResize() {
var displayText = document.getElementById('active-text');
w = Math.round(displayText.offsetWidth / 8) + 14;
h = Math.round(displayText.offsetHeight / 16) + 14;
var displayChanged = false;
if (VIEWPORT_WIDTH !== w || VIEWPORT_HEIGHT !== h) {
console.log("Display width was changed from " + VIEWPORT_WIDTH + " to " + w);
displayChanged = true;
}
handle2DBufferDimensionChange(w, h);
return displayChanged;
}
// Note that this involves a reordering.
function toTileCoordinate(x, y, z) {
return [Math.floor(z), Math.floor(x), Math.floor(y)];
}
// Calculate fine 2D vertical correction in render position from 3D float coordinates.
// Note that we consider the various coordinates independently, since combining them
// results in jitter.
function verticalCorrection(x, y, z) {
return Math.floor(2 * (z - Math.floor(z))) - Math.floor((y - Math.floor(y)));
}
// Calculate fine 2D horizontal correction in render position from 3D float coordinates.
// Note that we consider the various coordinates independently, since combining them
// results in jitter.
function horizontalCorrection(x, y , z) {
return Math.floor(3 * (x - Math.floor(x))) - Math.floor(2 * (y - Math.floor(y)));
}
function getMapFetcher(map_id) {
switch (map_id) {
case WETLANDS:
return getWetlandTile;
case SPINNING_SECTORS:
return getSpinningSectorsTile;
case RECTANGLES:
return getRectanglesLevelTile;
case FIGURE_EIGHT:
return getFigureEightWorldTile;
case MOVING_MAP:
return getMovingMapTile;
case PENROSE:
return getPenroseTile;
case CUBE_FRAME:
return getCubeFrameTile;