我正在尝试在 JavaScript 中绘制 tetrominos,但遇到了一些麻烦。我认为我的代码 this.blocks = i.blocks[b][c] 不正确,但可能更多。现在我的眼睛开始疼了,我决定寻求帮助。this.blocks = i.blocks[b][c] 因为 this.blocks 不能存储数组而不起作用?还是有其他问题。感谢您的帮助。
这是 jsfiddle 链接:http: //jsfiddle.net/8aS9E/
这是代码:
var canvas = document.getElementById("canvas");
var ctx = canvas.getContext("2d");
canvas.height = window.innerHeight;
canvas.width = window.innerWidth;
var h = canvas.height;
var w = canvas.width;
var gridWidth = w / 4;
var gridHeight = h;
var cols = gridWidth / 10; //width, columns
var rows = cols; //height, rows
window.addEventListener("keydown", test, true);
var b = 0;
var c = 0;
var gravity = 0;
var id;
var type = 2;
var color;
var x = gridWidth * 2;
var y = -30;
var position;
var velocityY;
var tetrominoId = 0;
var i = { id: 'i', size: 4,
blocks: [[0, 1, 0, 0],
[0, 1, 0, 0],
[0, 1, 0, 0],
[0, 1, 0, 0]],
color: 'cyan' };
function tetromino(id, type, color, position, y, velocityY){
this.id = i.id;
this.blocks = i.blocks[b][c];
this.color = i.color;
this.x = x;
this.y = y;
this.velocityY = 1;
}
var tetrominoList = [];
function addTetromino(type, color, position, x, y, velocityY){
tetrominoList[tetrominoId] = new tetromino(tetrominoId, type, color, x, y, velocityY);
tetrominoId++;
}
function tetrominoDraw(){
tetrominoList.forEach(function(tetromino){
for(b = 0; b < 4; b++){
for(c = 0; c < 4; c++){
ctx.fillStyle = tetromino.color;
ctx.fillRect(
gridWidth * 2 + tetromino.blocks[b][c] *
b * cols, tetromino.blocks[b][c] * c * rows + gravity + y,
cols, rows
);
ctx.fill();
}
}
}
});
}
谢谢!