dev-038 → dev-040 changes — GX-TXT Native 3D CORE API

Scope of the dev-38 → dev-40 continuation

The Native 3D foundation remains ABI v1. dev-38/039/040 add capabilities and functions without replacing the established object/render/field/animation model. dev-40’s public engine header has 16 function additions relative to dev-37; the animation and field headers are unchanged over that comparison.

dev-038 — connected-surface wrapping

Curved image charts propagate over edge-connected source triangles through unfolded transport.
New status and seam queries expose chart/rendered counts, stop reasons and explicit transported-coordinate seams.
The Viewer Provider’s visible Navigation Cube delegates hit testing and orientation to CORE.

dev-039 — particle clouds and positional lighting

Introduces scene-owned gx3de_particle_cloud with copied positions, global/per-particle radius and color, global opacity, transform and visibility.
Introduces gx3de_positional_light as an override of an enabled directional slot.
Current renderer semantics remain geometric; no physical volumetric attenuation or per-particle opacity is implied.

dev-040 — sampled scientific density

Adds gx3de_scientific_color_array_set/get for normalized point-associated RGB/RGBA.
Direct color has priority over scalar coloring; clearing restores the pre-existing scalar role without destroying it.
Final alpha composes object opacity, scientific opacity array and direct RGBA alpha.
Sphere-glyph safety cap rises to 100,000 instances and uses lower tessellation above 20,000, still constrained by display triangle budget.
Scientific point/glyph density remains a normal scientific object and is distinct from gx3de_particle_cloud.

Exact functions added since dev-37

Function	Area
`gx3de_curved_texture_seams_get`	Textures
`gx3de_curved_texture_status_get`	Textures
`gx3de_particle_cloud_count_get`	Particle clouds
`gx3de_particle_cloud_create`	Particle clouds
`gx3de_particle_cloud_destroy`	Particle clouds
`gx3de_particle_cloud_particles_set`	Particle clouds
`gx3de_particle_cloud_style_get`	Particle clouds
`gx3de_particle_cloud_style_set`	Particle clouds
`gx3de_particle_cloud_transform_get`	Particle clouds
`gx3de_particle_cloud_transform_set`	Particle clouds
`gx3de_particle_cloud_visible_get`	Particle clouds
`gx3de_particle_cloud_visible_set`	Particle clouds
`gx3de_scientific_color_array_get`	Scientific data
`gx3de_scientific_color_array_set`	Scientific data
`gx3de_view_positional_light_get`	Views
`gx3de_view_positional_light_set`	Views

Compatibility consequence

A consumer compiled for the older ABI should capability-check the new families instead of assuming them. Because ABI version remains 1 and additions are capability-gated, older functionality remains addressable through the same public header model. In a runtime that lacks a dev-40 capability, fall back to scalar/object color, directional lights or ordinary mesh/scientific presentation as appropriate.