Entry 39

Fields in the viewer

2026-09-23worldrendertest

Filescrates/piney-viewer/src/mesh.rscrates/piney-viewer/src/main.rs

With the draw rules of 38 in Field::scene, the viewer shows fields: piney-viewer --field SEED[,TYPE[,WEATHER]].

mesh::build_field assembles what the scene lists:

• Ground and cover. Each visible chip's ground tile, and each cover, is a copy of its template model with the listed vertices' z and colour rewritten, placed by its translation.
• Objects. Each object's clump or animation stands at the game's z, and animated objects play (35).
• Object colours. Before anything is emitted, the rigid models of the type's object clumps are lit by object_colours, as many times as lit_clumps lists each clump. This is what WORLD::Init does to the loaded models.
• Water. On lake fields, the field_eff water surface is drawn.
• Fog. The fog row of the type and weather becomes the viewer's fog environment (F toggles it).

The whole 80 x 80 map is drawn at once. The game draws the 12 x 12 chips around the player on a torus.

The background (sky, clouds, mountains) is built too, but the viewer leaves it out. The game centres it on the player. Placed at the map's middle and seen from the viewer's camera above the field, the sky dome covers everything. build_field still takes a flag for it, and the test builds it for every type.

In the window, Left/Right (L1/R1) change the weather, A (Triangle) the field type, skipping type 4, which has no field, and M (Square) the seed, by the game's own RNG.

Checked

Shots of three fields look right:

• seed 12345, type 0: volcanic ground, field_a;
• seed 777, type 2: rolling grassland with a lake, field_c;
• seed 777, type 5, weather 3: snow, field_g.

Objects stand on the ground rather than floating or sinking, which the bilinear guess of 33 did not promise.

every_field_type_builds generates and assembles a field of each of the ten types with its background and water. Every field has more than 10,000 triangles, all vertices finite, all indices in range, and every object's z within the ground's range.