How Can We Generate More Realistic Island Shapes in Map Generation Beyond Perlin Noise?

Gradient Circles for Map Generator

Perlin noise is commonly used in map generation, but creating realistic island shapes using circles with gradients can lead to unnatural edges. This issue arises due to a lack of proper handling during the noise calculation.

Alternative Approach: Diamond and Square Algorithm

Diamond and square algorithm is suggested as an alternative method for island generation. Here's the general approach:

1. Configure Generation Properties:
Define elevation ranges, sea level, vegetation, rock/dirt types, slope parameters, etc.

2. Create Terrain Height Map (zed[][]):
Use a modified Diamond and square algorithm. Initialize with lowest elevation in corners and adjust for island-like terrains.

3. Create Surface Map (typ[][]):
Based on terrain elevation, assign surface types (e.g., water, sand, vegetation, rock). Add slope-based features (e.g., rocks).

Implementation Notes:

• The output typically produces a single large hill on the island. To create multiple hills, generate multiple terrain maps and take their average.
• Lighting can be added to enhance visual quality.
• River formation can be implemented by identifying the highest peak, initializing a river there, and recursively finding the lowest neighbor not marked as a river until reaching water or a map boundary.

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