如何将Perlin杂讯功能（libnoise）映射到图块阵列？

Question

The Perlin.GetValue(x, y, z) method of libnoise (using the C# port) returns 0's if the input values are integers. How could I go about mapping a 2D array of tiles--as the indices of an array are integers--to the values of the noise? This makes little sense to me as even 3D terrain eventually rests upon whole integer values. For those who are generating such 3D landscapes, are these positions in the terrain always restrained to being a value of 0?

EDIT: I should mention that I am using a chunk system, so I loop through each chunk's [32, 32] array of tiles to get the Perlin noise values. I was hoping that by adding the offset of the chunk in world space to the [x, y] value of the tile in the array I could have continuous terrain. Regardless, I tried something like this and still got zero from the noise function:

double temp = generator.GetValue((x + offsetX) / ChunkSize, (y + offsetY) / ChunkSize, 0);

EDIT 2: I output the values of the noise functions to 32x32 textures and put them next to each other. Noise is being produced but it isn't continuous despite adjusting the input of the x and y values for the offset of the chunk.

EDIT 3: Problem solved. My offset values were set to pixel coordinates instead of tile/chunk coordinates. I was multiplying the index of the chunk by the chunk size times the tile size instead of just the chunk size (which is in tiles).

Answer 1

Perlin.GetValue(x, y, z)的输入值是双精度值，并且在技术上不限于0.0-1.0范围，但是我建议您采用所有数组索引并将它们除以该维度中的数组长度，以便都落在0.0-1.0的范围内，您应该得到不错的噪声值，如果噪声太大，则可以通过缩放来调整噪声，例如，如果索引在0.0到2.0之间缩放可能会产生更平滑的噪声。