mirror of
https://github.com/unanmed/ginka-generator.git
synced 2026-05-14 04:41:12 +08:00
50 lines
1.9 KiB
Python
50 lines
1.9 KiB
Python
import numpy as np
|
||
|
||
def blend_alpha(bg, fg, alpha):
|
||
""" 使用 alpha 通道混合前景图块和背景图 """
|
||
for c in range(3): # 只混合 RGB 三个通道
|
||
bg[:, :, c] = (1 - alpha) * bg[:, :, c] + alpha * fg[:, :, c]
|
||
return bg
|
||
|
||
def matrix_to_image_cv(map_matrix, tile_set, tile_size=32):
|
||
"""
|
||
使用OpenCV加速的版本（适合大尺寸地图）
|
||
:param map_matrix: [H, W] 的numpy数组
|
||
:param tile_set: 字典 {tile_id: cv2图像（BGR格式）}
|
||
:param tile_size: 图块边长（像素）
|
||
"""
|
||
H, W = map_matrix.shape # 获取地图尺寸
|
||
canvas = np.zeros((H * tile_size, W * tile_size, 3), dtype=np.uint8) # 画布（黑色背景）
|
||
|
||
# 遍历地图矩阵
|
||
for row in range(H):
|
||
for col in range(W):
|
||
tile_index = str(map_matrix[row, col]) # 获取当前坐标的图块类型
|
||
x, y = col * tile_size, row * tile_size # 计算像素位置
|
||
|
||
# 先绘制地面（0）
|
||
if '0' in tile_set:
|
||
canvas[y:y+tile_size, x:x+tile_size] = tile_set['0'][:, :, :3] # 仅填充 RGB
|
||
|
||
if tile_index == '11':
|
||
if row == 0:
|
||
tile_index = '11_1'
|
||
elif row == W - 1:
|
||
tile_index = '11_3'
|
||
elif col == 0:
|
||
tile_index = '11_2'
|
||
elif col == H - 1:
|
||
tile_index = '11_4'
|
||
|
||
# 叠加其他透明图块
|
||
if tile_index in tile_set and tile_index != 0:
|
||
tile_rgba = tile_set[tile_index]
|
||
tile_rgb = tile_rgba[:, :, :3] # 提取 RGB
|
||
alpha = tile_rgba[:, :, 3] / 255.0 # 归一化 alpha
|
||
|
||
# 混合当前图块到背景
|
||
canvas[y:y+tile_size, x:x+tile_size] = blend_alpha(
|
||
canvas[y:y+tile_size, x:x+tile_size], tile_rgb, alpha
|
||
)
|
||
|
||
return canvas |