节点等距图映射渲染第二层问题
我正在以节点构建等距地图图像,并且我陷入了第二层渲染,我不知道如何在y轴上调整项目
到目前为止是我的代码:
let i = 0;
for (let layer of map) {
const xTiles = layer.length;
const yTiles = layer[0].length;
for (let Xi = xTiles - 1; Xi >= 0; Xi--) {
for (let Yi = 0; Yi < yTiles; Yi++) {
const imgIndex = layer[Xi][Yi];
if (imgIndex == null || imgIndex == -1) {
continue;
}
const tile = tiles[imgIndex];
const offX = (Xi * tileColOffset / 2 + Yi * tileColOffset / 2 + originX) + (i * ((tileColOffset - tile.width) / 2));
const offY = (Yi * tileRowOffset / 2 - Xi * tileRowOffset / 2 + originY) - (i * ((tileRowOffset / 2)));
ctx.drawImage(tile, offX, offY);
}
}
i++;
}
我可以将精灵置于x上轴但不在y上,可能是因为精灵的高度不同。上面的代码重现此
您可以看到较高的精灵非常居中,但小精灵不是。有建议吗?
谢谢!
I'm building an isometric map tile image in Node and I'm stuck at the second layer rendering, I can't figure out how to adjust items in the y axis
Here's my code so far:
let i = 0;
for (let layer of map) {
const xTiles = layer.length;
const yTiles = layer[0].length;
for (let Xi = xTiles - 1; Xi >= 0; Xi--) {
for (let Yi = 0; Yi < yTiles; Yi++) {
const imgIndex = layer[Xi][Yi];
if (imgIndex == null || imgIndex == -1) {
continue;
}
const tile = tiles[imgIndex];
const offX = (Xi * tileColOffset / 2 + Yi * tileColOffset / 2 + originX) + (i * ((tileColOffset - tile.width) / 2));
const offY = (Yi * tileRowOffset / 2 - Xi * tileRowOffset / 2 + originY) - (i * ((tileRowOffset / 2)));
ctx.drawImage(tile, offX, offY);
}
}
i++;
}
I can center the sprite on the x axis but not on the y one, probably because sprites have different heights. The code above reproduces this
As you can see the taller sprites are quite centered, but the small ones are not. Any suggestion?
Thanks!
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刚刚发现我必须计算地面砖的半高度与精灵高度之间的差:
Just found out that I have to calculate the difference between the half height of the ground tile and the height of the sprite: